BEARINGS DESIGN GUIDE
TABLE OF CONTENTS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
INTRODUCTION
1 COLOR
<<< and product manufacturing divisions.
Polygon’s company history
3-10
PMS 1795 RED
REVERSE TEXT
PRODUCT INFORMATION
11-24
POLYLUBE® MRP BEARINGS
11-12
A superb bearing material for agriculture, construction and material handling applications requiring good load
<<< BLACK
capacity, low frictional values, and superior wear characteristics.
POLYLUBE® GLASS TAPE BEARINGS
13-14
An excellent solution for bearing applications where stick/slip is of concern.
<<<
POLYLUBE® IFR BACKED
BEARINGS
REVERSED
15-16
A bearing with optimized structure for resistance to applications with repeated impact fatigue or stress/strain conditions.
POLYLUBE® HIGH TEMPERATURE BEARINGS
17-18
A bearing designed for environments over 500˚F or where thermal expansion stability is critical.
POLYLUBE® GUIDE ROD BEARINGS
19-24
A guide rod bearing for pneumatic cylinder applications where corrosion, high misalignment or edge loading,
low friction and excellent wear characteristics are desired.
POLYLUBE® THRUST BEARINGS
25
Thrust bearings capable of operation in contaminated environments without the need for lubrication or risk of
damage to mating surfaces.
BEARING DESIGN PRINCIPLES
26-33
STANDARD SIZE CHARTS
34-37
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
02
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
INTRODUCTION
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
ABOUT OUR COMPANY
1 COLOR
<<< in 1949 by a chemist working on advanced comPolygon Company was founded
posite materials during World War II at the U.S. Wright-Patterson Air Force base,
and has since grown into an engineered materials company with multiple manufacturing facilities and global distribution and sales offices around the world.
PMS 1795 RED
REVERSE TEXT
Polygon’s original patents for composite self-lubricating bearings in the mid
1960’s stand as a hallmark in the development of journal bearing technology.
Since that time, Polygon’s ongoing research and development activities have
resulted in multiple patents<<<onBLACK
innovative self-lubricating products as well as
proprietary manufacturing capabilities that allow Polygon to project superior
value in the journal bearing marketplace.
First Facility circa 1949.
Corporate research and development activities, including an in-house bearing
test laboratory and Idea Center engine, are located in the company’s corporate
offices and primary manufacturing location in Walkerton, Indiana (approximately
90 miles east of Chicago, Illinois).
<<< REVERSED
POLYGON’S DIVISIONS
FOUR DISTINCT PRODUCT DIVISIONS:
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r#FBSJOHmHSFBTFMFTTDPNQPTJUFCFBSJOHT
First Continuous Fiber Process
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and power distribution.
Today's Indiana Plant
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
03
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
INTRODUCTION
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
WHAT IS A COMPOSITE BEARING?
1 COLOR
<<<
PolyLube® bearings use continuous
fiberglass filaments incorporated into a proprietary epoxy resin matrix for a very high strength bearing that is naturally concentric
with no seam or overlap. This high strength laminate construction allows for a thin
wall (1/16" to 1/8") bearing, reducing the size and weight of the assembly. The
resulting bearing exhibits a very low coefficient of friction coupled with high loadbearing capacity.
PMS 1795 RED
REVERSE TEXT
Polygon is the largest purchaser of PTFE fabrics in the
world.
<<< BLACK
POLYLUBE LINER DESIGN
PolyLube bearings utilize a proprietary design that ensures the anti-friction lining is
locked into the composite material with more than a simple adhesion effect. This
proprietary design also drives excellent resistance to impact fatigue and
cavitation problems.
1PMZ-VCF.31TFSJFTCFBSJOHTIBWFUIFJSMJOFSTBQQMJFEJOBESZNBOVGBDUVSJOH
mode. They are inherently very
resistant to impact because the liner backing has
<<< REVERSED
high strength fiberglass filaments interwoven into the liner backing.
The differences in liner construction can be seen most dramatically during three
periods: first, how coefficient of friction and wear change during the break-in period,
second, how the bearing handles contamination in a dirty or unsealed environment,
and third, long term bearing life. Differences in liner construction can also impact
performance in the following areas:
The PTFE fabric layer is reinforced by a fiber and epoxy
resin composite backing.
PTFE fabric is used in the entire liner of the bearing,
where it is incorporated into the resin structure as
shown in this detail view below.
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journal bearing will exhibit.
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impact the length of time as well as the operating conditions required to have
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outer diameter of the mating surface.
Although not required, a dry lubricant can be used at installation to improve
performance during the break-in period.
PolyLube provides a high percentage of available solid
PTFE for a lifetime of dry pin lubrication.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
04
INTRODUCTION
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GO GREASELESS!
1 COLOR
PolyLube® bearings not only<<<
exhibit excellent load capacities, low frictional values and
resistance to corrosion, they also allow for true self-lubrication.
PMS 1795 RED
REVERSE TEXT
“The PTFE super-filaments
used in the bearing wear surface
exhibit tensile strengths 20 times
WHAT ARE THE DESIRED CHARACTERISTICS OF JOURNAL/PLANE
BEARING MATERIALS?
greater than traditional PTFE resins.”
In general, journal/plane bearing materials should have the following characteristics
in order for the bearing assembly
<<< BLACKto be properly designed:
2. Contamination Resistance. The
contamination is allowed to deflect the
lower modulus bearings and eventually
work its way out of the joint without
damaging the pin.
3. PV Rating. The PV rating should
be easy to understand, and fit most
application environments with a good
match between the bearing pressure
and surface velocity capabilities.
4. Quick Transfer of PTFE Film to Shaft.
The key to self-lubricating bearings is the
SBQJEUSBOTGFSPG15'&GSPNUIFCFBSJOH
ID to the shaft surface during the initial
CSFBLJOQIBTF5IFàMNPG15'&POUIF
shaft functions as a dry lubricant, which
reduces the friction and wear rate.
40,000
5. Fiber Orientation to Minimize Friction.
In a properly designed self-lubricating
bearing, the bearing will exhibit a low
coefficient of friction when the contact
TVSGBDFJTPOUIFFOETPGUIF15'&àCFST
30,000
20,000
ONLY
WHEN
LUBRICATED
Porous
Bronze
Alloyed
Bronze
6. High Percent of PTFE Near the Surface.
*UJTOPUTVGàDJFOUUPTJNQMZIBWF15'&
fibers on the wear surface. A high percent
PG15'& is desirable near the surface of the
bearing to provide an ample amount of dry
lubricant for wear and friction reduction.
JOURNAL BEARING STATIC LOADS
SteelHardened
Backed
Steel
Bronze
REQUIRES
LUBRICATION
ENGINEERED WEAR SURFACES
MATERIAL FAMILY COMPARISONS
Single or Multi-Lubricated Filled
Molded Composites
Sintered Iron-Bronze
Metal Backed, Plastic Lined
Greased Bearings
30% Reinforced Thermoplastics
6
0
PHONE
40
POLYLUBE™
SELF
LUBRICATING
Molded Nylons and Acetals
Single or Multi-Lubricated Filled
Molded Composites
2 fpm
Sintered Iron-Bronze
KEY
Metal Backed, Plastic Lined
Greased Bearings
30% Reinforced Thermoplastics
Metal Backed
20
8 10
Reinforced
Teflon
Filled PTFEs and Unfilled Polyethylenes
PolyLube™ MRP
4
FabricReinforced
Phenolic
MATERIAL
Metal Backed
2
Zinc
Aluminum
JOURNAL BEARING DYNAMIC LOADS
Molded Nylons and Acetals
0
WITH
NO
LUBRICATION
10,000
Cast
Bronze
Filled PTFEs and Unfilled Polyethylenes
ENGINEERED WEAR SURFACES
MATERIAL FAMILY COMPARISONS
GREASED VERSUS GREASELESS JOURNAL
BEARING COMPARISONS
MAX. DYNAMIC CAPACITY-PSI
(LESS THAN 5 SFPM)
1. Truly Self-Lubricating.BOZNBUFSJBMT
claim to offer some level of self-lubrication; however, many (especially sintered
metal structures) lose their self-lubrication properties quickly during operation.
When the lubrication fails, metal-on-metal
contact results. Premature<<<
bearing
REVERSED
failure generally quickly follows.
30
40
50
60
70
BEARING PRESSURE
(psi 1,000’s)
800.918.9261
WEBSITE
PolyLube™ MRP
0
2
4
6
20
8 10
0
polygoncomposites.com
40
30
40
BEARING PRESSURE
(psi 1,000’s)
05
INTRODUCTION
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
WHAT “COMPOSITES PROFESSIONALS” MEANS TO YOU!
1 COLOR
<<< with composite self-lubricating bearings as a
Polygon is the only organization
primary product focus. Other bearing companies only see this product line as a
OFDFTTBSZPGGFSJOHUPTBUJTGZUIF0&.NBSLFU
PMS 1795 RED
REVERSE TEXT
This family of materials is our core competency at Polygon. We hold the first
patents on composite bearing design. We have the experience to better predict the
performance of this type of bearing, can better define what factors drive product
performance, and have a strong manufacturing infrastructure to support your business needs. Our abilities to<<<specify
sizing, assembly, and design parameters are
BLACK
VONBUDIFEJOUIFDPNQPTJUFCFBSJOHJOEVTUSZ8IZ #FDBVTFJUJTDPSFUPXIBUXF
do. The value to you? Polygon Company has the best designed, highest performing
bearing material available, at the best cost in the industry.
The environmental issues around grease are only now
coming to light. With self-lubrication all environmental
contaminants are eliminated
POLYLUBE® LOWERS TOTAL COST OF OPERATION (TCO)
A design engineer must continually
<<< REVERSED search out materials that increase performance
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cost of operation?
Poor lubricant maintenance is one of the most common failure points for bearings.
A properly sealed and lubricated bearing should result in trouble-free field service in
theory. Unfortunately, this is rarely the case. Greased joints may not be maintained
properly, resulting in boundary/mixed lubrication condition and diminished bearing
MJGF#FBSJOHTBSFPGUFOHSFBTFEPOMZUXJDFJOUIFJSMJGF PODFCZUIF0&.BOEPODF
before they are sent back for the warranty claim due to bearing failure from lack of
lubrication. The following items can be eliminated with a truly greaseless bearing:
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Self-lubricating bearings eliminate secondary pin and
housing fabrication required for greased bearings.
“Many materials claim to offer
some level of self-lubrication;
however, many lose their
TOTAL COST OF OWNERSHIP ANALYSIS
8
self-lubrication properties quickly
during operation.”
COST FACTOR
6
4
2
0
ASSEMBLY
COST
HOUSING
FABRICATION
COST
ZIRK
ASSEMBLY
COST
FACTORY
GREASING
GREASED BEARINGS
PHONE
800.918.9261
WEBSITE
UNIT
PURCHASE
PRICE
ONGOING
MAINTENANCE
COST
TOTAL
COST OF
OWNERSHIP
POLYLUBE GREASELESS BEARINGS
polygoncomposites.com
06
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
INTRODUCTION
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
POLYLUBE® LOWERS TOTAL COST OF OPERATION (TCO) – CONTINUED
1 COLOR
The total cost of ownership<<<
for a bearing that must be lubricated is greater than
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found that the cost of purchasing, assembling, and maintaining a greased bearing joint is at a minimum 1.5 times to a maximum of 4 times the cost of a selfMVCSJDBUJOHCFBSJOHKPJOU&RVJQNFOUSFOUBMZBSETBSFJODSFBTJOHMZTFOTJUJWFUPUIF
liability associated with greased bearings.
PMS 1795 RED
REVERSE TEXT
&YUFSOBMMVCSJDBUJPOJTBOVODPOUSPMMBCMFEFTJHOWBSJBCMFGPS0&.FOHJOFFST0ODF
the finished product is shipped
<<< BLACKto the customer they must properly maintain the
bearing assembly. Failure can lead to liability or warranty claims. If proper maintenance is a concern, the best solution is a self-lubricating composite bearing.
Self-lubrication is the ideal solution since it fully lubricates the contact surfaces
requiring absolutely no field or long term maintenance. Dry lubrication does not
attract dust or dirt and results in no environmental grease or oil contamination.
Hex ID and special ID shapes can be incorporated into
the bearing as well.
WHEN TO USE POLYLUBE
<<< BEARINGS
REVERSED
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r 8IFOCFBSJOHOFHMFDUDPVMEMFBEUPQSPEVDUMJBCJMJUZDMBJNTPSQSFNBUVSFGBJMVSF
r 8IFODPOWFOUJPOBMMVCSJDBOUTXJMMOPUGVODUJPOPSDBOOPUCFVTFE BTJOUIFGPPE
processing and pharmaceutical industries).
Polygon’s CNC fabrication equipment allows for special
designs to be economically incorporated.
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r 8IFOXJEFUFNQFSBUVSFSBOHFT QBSUJDVMBSMZBUMPXUFNQFSBUVSFT SFRVJSFCFBSJOH
performance stability.
“One of the most common failures
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r When resistance to chemical, galvanic, or fretting related corrosion is a problem.
for bearing design is when
lubrication is not properly
maintained. PolyLube® bearings
eliminate lubrication maintenance.”
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PHONE
800.918.9261
WEBSITE
polygoncomposites.com
07
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
INTRODUCTION
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
COMPOSITE BEARINGS COMPARED
1 COLOR
<<<
5PEBZT0&.FOHJOFFSIBTNBOZCFBSJOHBMUFSOBUJWFTUPDIPPTFGSPN8IFONBLJOH
a design decision, it can be difficult to weigh material choices for your design.
Consult this application-driven discussion comparing composite bearings to
common alternatives.
PMS 1795 RED
REVERSE TEXT
GREASED BEARINGS
The most obvious difference?
These bearings require perpetual greasing, adding
<<< BLACK
both material and labor costs to the product. When the lubricating film fails due
to contamination, the bearing will prematurely wear. Performance of this bearing is
entirely reliant on the end user properly maintaining and servicing the bearing joint
in question.
MATERIAL
MAX. DYNAMIC
MAXIMUM
CAPACITY-PSI
TEMPERATURE
REVERSED
(LESS
THAN 5 SFPM)
°F
<<<
THERMAL
EXPANSION
10-6 IN./IN./°F
SPECIFIC
GRAVITY
When grease fails these bearings quickly wear through
and produce intimate contact between the shaft and
bearing.
“Performance of a greased bearing
is entirely reliant on the end user
properly maintaining and servicing
the bearing joint.”
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ADDITIONAL PERFORMANCE DIFFERENCES:
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SBOHFTGSPNUPž'
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PHONE
800.918.9261
WEBSITE
polygoncomposites.com
08
INTRODUCTION
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
SINTERED METALLIC BEARINGS
1 COLOR
<<< innate limitations due to their semi-fused nature. The
Sintered metallic bearings have
structure dramatically reduces impact or shock loading capability as well as both the
static and dynamic loading capacities.
PMS 1795 RED
REVERSE TEXT
ADDITIONAL PERFORMANCE DIFFERENCES:
r "UCFTU EZOBNJDDBQBDJUJFTPG 14*
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UIBUJT 14*PSMFTTUIBO4'.XJUIMVCSJDBUJPO
r -PXFSFEJNQBDUPSGBUJHVFTUSFOHUIQSPQFSUJFT
BLACK
<<<
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Sintered structure bearings can’t handle the load of
composite bearings
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FILLED THERMOPLASTIC BEARING MATERIALS
r 4J[JOHQSFEJDUBCJMJUZ*OKFDUJPONPMEJOHMFBETUPIJHIFSTJ[FWBSJBUJPO
r $SFFQm5IFSNPQMBTUJDTXJMMQMBTUJDBMMZEFGPSNPWFSUJNFVOEFSMPBE
r *NQBDU'BUJHVF&WFOHMBTTàMMFEUIFSNPQMBTUJDSFTJOTDBOPOMZHPTPGBSXJUI
<<< REVERSED
resistance to repeated impact.
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humid environments causing binding between pin and bearing.
r The homogeneous construction of filled thermoplastic bearings means the bearing
is being held in the housing with the same material interacting with the pin,
allowing a greater frequency of walking or spinning in the bore.
Filled thermoplastics have no chance in highly loaded
environments.
METAL BACKED BEARINGS
.FUBMCBDLFECFBSJOHNBUFSJBMTIBWFCFFOBOPCWJPVTDIPJDFHJWFOUIFJSGFBUVSF
CFOFàUDPNCJOBUJPOBOEJOJUJBMQVSDIBTFQSJDF)PXFWFS 1PMZ-VCF¡CFBSJOHTBSF
quite often the clear winners when total cost of operation is considered.
ADDITIONAL PERFORMANCE DIFFERENCES:
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contaminate environments.
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FEHFTDBODBVTFJODSFBTFEXFBSPOUIF15'&PWFSMBZ MFBEJOHUPJOUJNBUF
contact between the metal substrate and pin.
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form this maintenance. This adds up to significant costs for the end user over
the life of a product.
Once the overlay is worn through, intimate contact and
failure can quickly result.
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shaft is in intimate contact with the lining.
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premature failure.
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with PolyLube.
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greasing systems all of which are not needed with PolyLube’s permanent lubrication.
r "TXJUIBOZNFUBMTUSVDUVSF UIJTUZQFPGCFBSJOHJTTVCKFDUUPTFWFSFDPSSPTJPO‡
BOJTTVFUIBUDBOPDDVSBTRVJDLMZBTIPVSTJOUPCBTJDJNNFSTJPOUFTUJOH
r 5IFSNPQMBTUJDCFBSJOHTBSFQSPOFUPTXFMMJOHXIFOTVCKFDUFEUPNPJTUVSF
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
Thermoplastics are highly subject to cold flow under loading—something PolyLube® bearings do not struggle with.
09
INTRODUCTION
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
ROLLING ELEMENT BEARINGS
1 COLOR
<<<to handle higher load capacities than rolling element
PolyLube® bearings are able
bearings, particularly with shock loading.
PMS 1795 RED
REVERSE TEXT
ADDITIONAL PERFORMANCE DIFFERENCES:
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profile of the bearing can be reduced by over 50%.
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OFFEMFCFBSJOHXJMMPOMZIBWFPGUIFTUBUJDDBQBDJUZ
<<< BLACK
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failed lubrication media resulting in shaft damage.
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parts, PolyLube is able to have stable and predictable performance over the
life of the application.
Typical metal needle bearings fail under high loading.
r3PMMJOHFMFNFOUCFBSJOHTDBOPOMZCFVTFEJODPOUBNJOBUFEFOWJSPONFOUTJGUIF
costly option of integrated
REVERSED are used.
<<<seals
BREAK-IN AND FILM TRANSFER
The secret to PolyLube’s high load greaseless operation is the use of uniquely woven
15'&TVQFSàMBNFOUTJOUIFCFBSJOHMJOFS5IFZFYIJCJUUFOTJMFTUSFOHUITUXFOUZUJNFT
HSFBUFSUIBO15'&SFTJOTBOEBSFOPUTVCKFDUUPDPMEáPXVOEFSIJHIMPBE/PTFDPOEBSZ
lubrication is necessary due to the film transfer process, even during start-up.
“No external lubrication is required
with PolyLube®— there are no
concerns with failed lubrication
media resulting in shaft damage.”
"TUIFCFBSJOHCFHJOTTFSWJDF UIFMJOFST15'&VOEFSHPFTBQIBTFDIBOHFBOEEJTCVSTes over the mating pin surface, transferring from the inner diameter to the pin's wear
TVSGBDFBOETNPPUIJOHPVUBOZNBDSPTDPQJDTVSGBDFJNQFSGFDUJPOT&TTFOUJBMMZ BTNBMM
BNPVOUPGUIFMJOFSJTXPSOBXBZBOETBDSJàDFEUPDPBUUIFQJOXJUIBMPXGSJDUJPO15'&
film. This wear is often negligible, usually less than 0.001”.
This allows the bearing to have a very low coefficient of friction with minimal long-term
wear, under high loading conditions. Following the break-in period, the wear rate staCJMJ[FT SFNBJOJOHSFMBUJWFMZDPOTUBOUGPSUIFCFBSJOHTMJGF5FTUJOHPGUIF.31CFBSJOH
BU QPVOET XJUIžPTDJMMBUJPOBOHMF SFTVMUFEJOTUBCMFXFBSVOEFSuBU
over 1.5 million cycles.
The elapsed time for break-in is PV (Pressure and Velocity) dependent. The equilibrium
wear rate varies from operation to operation, due to a number of factors including:
loads, speeds, shaft hardness, material, and shaft surface finish. For more specific
guidance on the break-in period to anticipate given your specific application, please
contact a PolyLube application engineer.
1PMZ-VCF.31CFBSJOHTBSFEFTJHOFEUPNJOJNJ[FXFBSIPXFWFS UIFCFBSJOHXFBSJT
dependent on general operating conditions, such as speed, sliding distance and load.
With intermittent rotation or oscillation, radial wear should be negligible over thousands
PGIPVST)BSEDISPNFQMBUJOHHJWFTFYDFMMFOUXFBSQFSGPSNBODFBOEQSPUFDUTUIFTIBGU
GSPNDPSSPTJPO$PBUJOHTTVDIBTDISPNF FMFDUSPMFTTOJDLFM :;%PSOJUSPDBSCPOJ[JOH
are all common treatments for shaft materials used with PolyLube bearings. Some customers have even experienced great results using standard 1018 shaft material.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
10
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
MRP BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
MRP BEARINGS
<<< 1 COLOR
PRODUCT HISTORY
PMS 1795 RED
REVERSE TEXT
5IF.31CFBSJOHXBTCPSOGSPN1PMZHPOTDPOUJOVPVTJNQSPWFNFOUFGGPSUT0SJHJOBM
targets for the bearing were lower cost and lower performance. The actual result
was a decrease in cost due to thorough analysis and value stream mapping of the
manufacturing process and virtually identical performance compared to our legacy
QSPEVDU5IF.31CFBSJOHIBTCFDPNFUIFTUBOEBSEQSPEVDUPGGFSFEGPSCFBSJOH
customers and has supplanted the legacy product.
<<< BLACK
MRP Bearings are available in a wide variety of standard
and custom sizes.
PRODUCT DESCRIPTION
5IF.31IBTBVOJRVFBEEFEMVCSJDBOUFNCFEEFEXJUIJOUIFTVSGBDFPGUIFMJOFS
material to decrease the initial coefficient of friction. This small change was initiated because in certain lightly loaded joints, upon initial actuation, an intermittent
TUJDLTMJQPSOPJTFDPVMECFHFOFSBUFE5IF.31BEESFTTFTUIJTJTTVFCZEFDSFBTing friction and virtually eliminating the typical break in period.
1PMZ-VCF¡.31CFBSJOHTBSFEFTJHOFEUPNJOJNJ[FXFBSIPXFWFS
UIFCFBSJOHXFBS
<<< REVERSED
is affected by the general operating conditions, such as speed, sliding distance and
load. With intermittent rotation or oscillation, radial wear should be negligible over
UIPVTBOETPGIPVST)BSEDISPNFQMBUJOHHJWFTFYDFMMFOUXFBSQFSGPSNBODFBOE
protects the shaft from corrosion. Softer coatings such as cadmium or zinc may
exhibit different wear characteristics but are perfectly suitable for use against the
.31TVSGBDF
Cutaway showing the unique low friction fiber lining
architecture.
CALCULATED INITIAL COF FOR POLYLUBE MRP BEARINGS
4140 Nitrided Shafts
“These issues come together to allow
0.35
COEFFICIENT OF FRICTION
0.30
STATIC COF
Polygon to sell a product better
DYNAMIC COF
matched to customers’ needs.”
0.25
0.20
0.15
0.10
0.05
0.00
MRP 65 Ra
MRP 13 Ra
MRP 13 Ra
PIN SURFACE FINISH
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
11
MRP BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
MRP BEARINGS
1 COLOR
<<< PROPERTIES
MECHANICAL AND PHYSICAL
PMS 1795 RED
REVERSE TEXT
5IF1PMZ-VCF¡.31CFBSJOHDBOXJUITUBOETUBUJDMPBETPGBQQSPYJNBUFMZ 14*BOE 14*VOEFSEZOBNJDMPBEJOH'PSESZSVOOJOHBQQMJDBUJPOT UIF
maximum speed is approximately 10 surface feet per minute. The typical average design pressure for high duty cycle applications is 10,000 PSI.
5IJTCFBSJOHTPQFSBUJOHUFNQFSBUVSFSBOHFJT™ž'.BYJNVNDPOUJOVPVT
PQFSBUJPOBMTVSGBDFUFNQFSBUVSFGPSUIFTUBOEBSEGPSNVMBUJPOJTž' EFQFOEing upon load characteristics.
The bearing has been heat stabilized at these
<<< BLACK
temperatures, so that little dimensional change will occur in the bearing during
PQFSBUJPO*OBGSFFTUBUF UIFDPFGàDJFOUPGFYQBOTJPOPGUIF1PMZ-VCF.31
bearing is 4.8 x 10-6JOJOž' MPXFSUIBOTUFFMBOENPTUNFUBMT
MRP eliminates the maintenance of greased joints.
APPLICATIONS
1PMZ-VCF.31CFBSJOHTBSFUIFCFBSJOHPGDIPJDFJOIJHIMZMPBEFECFBSJOHKPJOUT
where a life cycle of over 500,000 cycles is desired. Testing has shown this
bearing has wear under 0.006"
after 1.6 million cycles. Applications include
<<< REVERSED
material handling equipment, high duty cranes, earth-moving equipment, conTUSVDUJPOFRVJQNFOU BHSJDVMUVSFFRVJQNFOUBOEGPPEQSPDFTTJOHTZTUFNT.31
bearings have extremely low absorption rates and are well designed for wet and
submerged applications.
6MUJNBUF$PNQSFTTJPO4USFOHUI 14* 6OJU-PBE-JNJU 14* 5FNQFSBUVSF3BOHF 4UBOEBSE'PSNVMBUJPO ™ž'
$PFGàDJFOU0G5IFSNBM&YQBOTJPO JOJOž' Y10-6
5IFSNBM$POEVDUJWJUZ #56rJO ISr'Urž' 8BUFS"CTPSQUJPO )PVST 8BUFS"CTPSQUJPO )PVST 4QFDJàD(SBWJUZ
.BYJNVN7FMPDJUZ 4'. MRP at work.
/PUF4QFDJBMSFTJOGPSNVMBUJPOBWBJMBCMFVQUPž'4FFQBHFGPSGVSUIFSEFTJHOTVHHFTUJPOT
PolyLube® is standard in the man-lift industry
where reduced warranty claims are made
possible by eliminating customer greasing.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
12
GLASS TAPE BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GLASS TAPE BEARINGS
PRODUCT DESCRIPTION <<<
1 COLOR
PMS 1795 RED
REVERSE TEXT
5IF1PMZ-VCF¡(MBTT5BQFCFBSJOHJTBNPEFSBUF31.CFBSJOHEFTJHOFEGPSBQQMJDBtions with higher surface velocities or when mixed film conditions are desired.
The Glass Tape bearing is manufactured by a filament winding process that results in
a continuous fiberglass filament backing composition-ensuring excellent mechanical
properties (especially fatigue resistance) are attained. The filament wound fiberglass structure uses a high strength, corrosion resistant epoxy resin as the matrix
material. The high strength<<<
backing
permits the use of a thin wall (1/16" to 1/8")
BLACK
bearing which can often reduce the size and weight of the finished bearing assemCMZ1PMZ-VCF(MBTT5BQFCFBSJOHTXJMMTVQQPSUBEZOBNJDCFBSJOHMPBEPG PSI, while handling high radial and longitudinal stresses with a static bearing
DBQBDJUZPG 14*5IJTGBNJMZPGNBUFSJBMTFYIJCJUTFYDFQUJPOBMEJNFOTJPOBM
TUBCJMJUZBOEQFSGPSNBODFQSFEJDUBCJMJUZPWFSXJEFUFNQFSBUVSFSBOHFT ™ž' PRODUCT SCHEMATIC
Glass Tape bearings combine high load and lowered
friction.
<<< REVERSED
The PolyLube Glass Tape lined bearing is similar in backing construction when
DPNQBSFEUPJUTTJTUFSQSPEVDUUIF.31CFBSJOHUIFEJGGFSFODFJOUIF
construction of the liner material drives the variations in performance. The primary
QFSGPSNBODFWBSJBUJPOCFUXFFOUIF(MBTT5BQFBOEUIF.31CFBSJOHTJTUIF
lower coefficient of friction for the Glass Tape bearing allowing for higher surface
velocities.
)PXFWFS UIF(MBTT5BQFCFBSJOHTBDSJàDFTTPNFDBQBCJMJUJFTXJUIBTMJHIUMZ
lower dynamic load capacity. These differences are driven from fact that the Glass
Tape bearing uses a proprietaryàMMFE15'&SFTJOTUSVDUVSFBTPQQPTFEUPUIFDPOUJOVPVT15'&àMBNFOUTVTFEJOUIF.31QSPEVDU5XPMJOFSUIJDLOFTTFTBSFBWBJMBCMF
XJUIUIFUIJDLMJOFSCFJOHTUBOEBSEBOEBUIJDLMJOFSCFJOHBWBJMBCMF
GPSVOJRVFBQQMJDBUJPOT5IFUIJDLMJOFSJTEFTJHOFEGPSBQQMJDBUJPOTXIFSF
boring the inner diameter might be required in order to achieve tighter tolerances
in an effort to address sizing and minor misalignment conditions.
MECHANICAL AND PHYSICAL PROPERTIES
The PolyLube Glass Tape bearing can withstand static loads of approximately
14*BOE 14*VOEFSEZOBNJDMPBEJOH"UUIFTFMPBEJOHMFWFMT NJOJmum distortion will occur. For dry running applications, the maximum speed is
approximately 80 surface feet per minute.
5IJTCFBSJOHTPQFSBUJOHUFNQFSBUVSFSBOHFJT™ž'.BYJNVNDPOUJOVPVTPQFSBUJPOBMTVSGBDFUFNQFSBUVSFGPSUIFTUBOEBSEGPSNVMBUJPOJTž' EFQFOEJOHVQPO
load characteristics. The bearing has been heat stabilized at these temperatures,
so that little dimensional change will occur in the bearing during operation. In a
free state, the coefficient of expansion of the PolyLube Glass Tape bearing is
4.8 x 10-6JOJOž' MPXFSUIBOTUFFMBOENPTUNFUBMT
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
13
GLASS TAPE BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GLASS TAPE BEARINGS
1 COLOR
<<< PROPERTIES
MECHANICAL AND PHYSICAL
PMS 1795 RED
REVERSE TEXT
Testing performed independently at Rensselaer Department of Mechanical Engineering
6OJU-PBE-JNJU 14* 5FNQFSBUVSF3BOHF 4UBOEBSE'PSNVMBUJPO ™ž'
$PFGàDJFOU0GUIFSNBM&YQBOTJPO JOJOž' Y10-6
5IFSNBM$POEVDUJWJUZ #56rJO ISr'Urž' 8BUFS"CTPSQUJPO )PVST 8BUFS"CTPSQUJPO )PVST Specific Gravity
1.95
.BYJNVN7FMPDJUZ 4'. <<< BLACK
COMPARATIVE PV and COEFFICIENT OF FRICTION TEST RESULTS
RESULTS FOR VARIOUS BEARINGS TESTED BY RENSSELAER
AVG. COEFFICIENT OF FRICTION
6MUJNBUF$PNQSFTTJPO4USFOHUI 14* P=200 psi (constant)
0.25
0.20
0.15
0.10
0.05
0.00
<<< REVERSED
Metal Backed
Bearing
Legacy Era
FW Bearing
PolyLube
Fiber Bearing
PolyLube Glass
Tape Bearing
BEARING MANUFACTURER AND TYPE
Testing performed independently at Rensselaer Department of Mechanical Engineering
COMPARATIVE
PVRESULTS
AND COEFFICIENT OF FRICTION TEST RESULTS
COMPARATIVE PV and COEFFICIENT
OF FRICTION TEST
Testing performed independently at Rensslaer Department of Mechanical Engineering
P=200 psi (constant)
80,000
0.20
0.15
0.10
0.05
0.00
RESULTS FOR VARIOUS BEARINGS TESTED BY RENSSELAER
P=200 psi (constant)
AVERAGE PV LIMIT
AVG. COEFFICIENT OF FRICTION
RESULTS FOR VARIOUS BEARINGS TESTED BY RENSSELAER
0.25
60,000
40,000
20,000
0.00
Metal Backed
Bearing
Legacy Era
FW Bearing
PolyLube
Fiber Bearing
PolyLube Glass
Tape Bearing
Metal Backed
Bearing
BEARING MANUFACTURER AND TYPE
Legacy Era
FW Bearing
PolyLube
Fiber Bearing
PolyLube Glass
Tape Bearing
BEARING MANUFACTURER AND TYPE
APPLICATIONS
AVERAGE PV LIMIT
"QQMJDBUJPOTGPS1PMZ-VCF¡(MBTT5BQF#FBSJOHTSBOHFGSPNHVJEFSPECFBSJOHT
to linear motion components to hydraulic pumps. Swashblock mounted bearings
RESULTS FOR VARIOUS BEARINGS TESTED BY RENSSELAER
are ideal applications P=200
for the
Glass Tape bearing material as long as application
psi (constant)
80,000
considerations are consistent with a mixed film condition.
60,000
The PolyLube bearing offers a more elastic, damage tolerant structure when
40,000
compared
to traditional metallic bearing materials. In addition, the Glass Tape
bearing
exhibits
good cavitation resistance when subjected to high pressure
20,000
fluids during cyclic conditions.
0.00
Metal Backed
Bearing
Legacy Era
FW Bearing
PolyLube
Fiber Bearing
PolyLube Glass
Tape Bearing
BEARING MANUFACTURER AND TYPE
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
14
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
IFR BACKED BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
IFR BACKED BEARINGS
PRODUCT DESCRIPTION
<<< 1 COLOR
PMS 1795 RED
REVERSE TEXT
5IF*'3CBDLJOHJTUZQJDBMMZDPNCJOFEXJUIUIF.31CFBSJOHMJOFSUPJODSFBTF
service life in applications with high edge loading caused by misalignment. The
*'3CBDLFECFBSJOH GPS*NQSPWFE'BUJHVF3FTJTUBODF PGGFSTBQSPQSJFUBSZMBNJnate structure of the bearing backing that increases the bearing’s resistance to
repeated stress/strain conditions.
Several years ago, Polygon Company was approached with a seemingly straight<<< BLACK filament wound composite bearings. At issue
forward application for traditional
was an application that was resulting in bearing failure due to high misalignment from a cantilevered design. The pressure on the bearing was well under
the design threshold (actual applied pressure to the bearing was 10,000 PSI).
In response to this customer’s demand, Polygon Company developed an improved fatigue bearing that in the case of the above application, increased the
life of the bearing by over 50%.
Standard IFR Backed Bearing.
ELASTIC MODULUS (% of maximum)
#FDBVTFDPNQPTJUFàMBNFOUXPVOECFBSJOHTBSFOPUJTPUSPQJDNBUFSJBMTBTBSF
<<< REVERSED
NFUBMT 1PMZHPO$PNQBOZT'&"MBNJOBUFBOBMZTJTGPDVTFEPOPQUJNJ[BUJPOPG
TZTUFNTJOUFSMBNJOBSTIFBS5IF1PMZ-VCF¡*'3CBDLFECFBSJOHPGGFSTBNPSF
than twofold increase in fatigue life over traditional composite bearing
MODULUS OF ELASTICITY AT VARIOUS WIND ANGLES
100
materials.
PRODUCT ADVANTAGES
80
Ex
Ey
Gxy
60
5IF1PMZ-VCF*'3CFBSJOHJTUIFàSTUCFBSJOHXJUITVDIBOPQUJNJ[FESFTJO
system and fiber/laminate architecture.
PRODUCT SCHEMATIC
40
Traditional
Wind Angle
PolyLube
High Strength
Wind Angle
20
Traditional filament wound composite bearings show fatigue failure in the form of
resin shear failure in the traverse direction to the reinforcing fibers. The logical
solution to this problem was to try to cross-tie the reinforcing fibers together with
other reinforcing fibers so as to minimize the shear stresses in the resin.
20
40
60
80
100
WIND ANGLE
STRENGTH PROPERTIES AT VARIOUS WIND ANGLES
80
Ex
Ey
Gxy
60
40
Traditional
Wind Angle
PolyLube
High Strength
Wind Angle
20
20
40
60
80
STRENGTH (% of maximum)
ELASTIC MODULUS (% of maximum)
MODULUS OF ELASTICITY AT VARIOUS WIND ANGLES
100
100
800.918.9261
WEBSITE
80
FxT
FyT
FxC
FyC
Fxy
60
40
Traditional
Wind Angle
20
PolyLube
High Strength
Wind Angle
20
40
60
80
100
WIND ANGLE
WIND ANGLE
PHONE
100
polygoncomposites.com
STRENGTH PROPERTIES AT VARIOUS WIND ANGLES
15
IFR BACKED BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
IFR BACKED BEARINGS
1 COLOR
MECHANICAL AND PHYSICAL<<<PROPERTIES
PMS 1795 RED
REVERSE TEXT
5IF1PMZ-VCF¡*'3CBDLFECFBSJOHDBOXJUITUBOETUBUJDMPBETPGBQQSPYJNBUFMZ
14*BOE 14*VOEFSEZOBNJDMPBEJOH"UUIFTFMPBEJOHMFWFMT minimum distortion will occur. For dry running applications, the maximum speed is
approximately 10 surface feet per minute. The typical average design pressure for
high duty cycle applications is 10,000 PSI.
5IJTCFBSJOHTPQFSBUJOHUFNQFSBUVSFSBOHFJT™ž'.BYJNVNDPOUJOVPVTPQFSB<<< BLACK
UJPOBMTVSGBDFUFNQFSBUVSFGPSUIFTUBOEBSEGPSNVMBUJPOJTž'
EFQFOEJOHVQPO
load characteristics. The bearing has been heat stabilized at these temperatures,
so that little dimensional change will occur in the bearing during operation. In a
GSFFTUBUF UIFDPFGàDJFOUPGFYQBOTJPOPGUIF1PMZ-VCF*'3CFBSJOHJT4.8 x 10-6 in/
JOž' MPXFSUIBOTUFFMBOENPTUNFUBMT
MECHANICAL PROPERTIES
MRP BEARING
IFR BACKED
8,750
9,450
Axial Compressive Strength (Sx psi)
24,750
19,750
Hoop Tensile Strength (Sy psi)
30,750
20,250
Hoop Compressive Strength (Sy psi)
30,800
20,250
Radial (wall) Compression Strength (Sz psi)
30,690
30,690
Axial Modulus of Elasticity (Ex Msi)
1.82
2.1
Hoop Modulus of Elasticity (Ey Msi)
3.71
2.57
Radial (wall) Modulus of Elasticity (Ez Msi)
0.97
0.97
Torsional Shear Modulus of Elasticity (Gxy Msi)
1.12
1.62
Poisson's Ratio (uxy)
0.21
0.36
Poisson's Ratio (uxy)
0.42
0.51
Poisson's Ratio (uxz)
0.3
0.25
<<<
Axial Tensile Strength (Sx psi)
REVERSED
IFR backed bearing are well suited for applications with
large magnitude changes in stresses.
POLYLUBE® IFR BACKED BEARING APPLICATIONS
&YDFMMFOUBQQMJDBUJPOTGPS*'3CBDLFECFBSJOHTJODMVEFCFBSJOHTZTUFNTVTJOHBMMPZFE
bronze, spring-retained, hardened bearings and hardened steel bearings.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
16
HIGH TEMPERATURE BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
HIGH TEMPERATURE BEARINGS
PRODUCT DESCRIPTION
<<< 1 COLOR
PMS 1795 RED
REVERSE TEXT
5IF1PMZ-VCF¡)5CFBSJOHJTBIJHIMPBE MPX31.CFBSJOHEFTJHOFEGPSBQQMJDBtions where self-lubrication is desired, but conventional composite bearings will
not perform high temperatures. This product has been designed to provide excellent performance at elevated temperatures. With a glass transition temperaUVSFPGPWFSž'UIJTFQPYZàMBNFOUXPVOETUSVDUVSFFYIJCJUTTVQFSCQFSGPSmance over extended exposure to elevated temperatures. The bearing material
is focused on applications where the bearing will be exposed to temperatures
<<< BLACK
VQUPž'
Standard High Temperature Bearing.
In addition to its high compressive properties (in both static and dynamic
modes), this bearing material is inherently self-lubricating. The self-lubrication
capability of Polygon’s new material means that the use of expensive high
temperature external lubricants such as polyurea grease, lithium grease, some
bentone greases, as well as advanced ester based oils and complex thickening
systems may no longer be necessary.
<<< REVERSED
5IF1PMZ-VCF)5CFBSJOHDSFBUFTBIJHITUSFOHUI TFMGMVCSJDBUJOHKPVSOBMCFBSJOH
material that can offer performance enhancements over greased systems, as
well as graphite loaded bronze structures, some iron-copper graphites, polysulGPOF 1&&, BOEQPMZNJEFCFBSJOHNBUFSJBMT
PRODUCT SCHEMATIC
5IJTCFBSJOHJTCBTFEPOUIFTBNFàMBNFOUXPVOETUSVDUVSFBTUIF1PMZ-VCF.31
CFBSJOHBOEIBTUIFTBNFXFBSMJOFS5IFSFTVMUJTUIBUUIF)5CFBSJOHIBTBIJHI
TUBUJDBOEEZOBNJDMPBEDBQBDJUZ5IF)5CFBSJOHJTBMTPJOIFSFOUMZTFMGMVCSJDBUJOH
UISPVHIUIFTBNFàMNUSBOTGFSQSPDFTTBTUIF.314FSJFTCFBSJOH
The PolyLube® High Temperature bearing was originated
from development work the company was doing on
high temperature, high RPM, high radially stressed composite materials for ring reinforced commutators. The
end was replacing steel-mica rings with a high strength
composite material.
The result of a higher temperature resin matrix, the same high strength filament
XPVOECBDLJOH BOEUIFTBNFTFMGMVCSJDBUJPOQSPDFTTDPNCJOFUPNBLFUIF)5
bearing an ideal solution for high temperature applications.
“The PolyLube® HT bearing can offer
performance enhancements over
greased systems, as well as
polysulfone, PEEK, and polymide
bearing materials.”
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
17
HIGH TEMPERATURE BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
HIGH TEMPERATURE BEARINGS
1 COLOR
MECHANICAL AND PHYSICAL<<<PROPERTIES
PMS 1795 RED
REVERSE TEXT
PHYSICAL PROPERTIES**
)PPQ4USFOHUI 'y THERMAL PROPERTIES**
QTJ
5FOTJMF4USFOHUI 'U Flexural Strength, Axial (Fbx 1PJTTPOT3BUJP "YJBM
<<< BLACK
LTJ
4QFDJàD)FBU #56MCž' LTJ
$PFGàDJFOUPG5IFSNBM&YQBOTJPO JOJOž' 4IFBS.PEVMVT (xy .TJ
&MBTUJD.PEVMVT &x .TJ
&MBTUJD.PEVMVT 5SBOTWFSTF &y .TJ
6MUJNBUF$PNQSFTTJPO4USFOHUI
QTJ
6OJU-PBE-JNJU
5FNQFSBUVSF3BOHF
QTJ
<<< REVERSED
5IFSNBM$POEVDUJWJUZ #56ISTRGUž'JO )FBU3FTJTUBODF $POUJOVPVT
UP
Y-6
UPž'
**Polygon's proprietary process of fiberglass filament winding results in exceptionally strong structures
to support the PolyLube wear surface. Loading in excess of 30,000 PSI can be tolerated in specific applications. A more general design approach for applications with oscillating pins and angular force vector
change less than 45 degrees should be designed to an average working pressure of 8,000 psi. Polygon
MRP and Fiber bearings will allow pressure spikes as high as 12,000 PSI during approximately 5% of the
operational life.
UPž'
8BUFS"CTPSQUJPOBTXFJHIUQSPEVDFE IPVST 8BUFS"CTPSQUJPOBTXFJHIUQSPEVDFE IPVST
0.16
4QFDJàD(SBWJUZ
.BYJNVN7FMPDJUZ
TGN
APPLICATIONS
1PMZ-VCF¡)JHI5FNQFSBUVSFBQQMJDBUJPOTBSFOPUKVTUGPSFMFWBUFEUFNperature environments but also for applications where the bearing may
need to resist thermal expansion during operation. One example of
this is in snowmobile clutch markets. In these applications, the clutch
TQFFEHPFTGSPNUPWFSZIJHI31.TJONJDSPTFDPOET BOEWJDF
versa). During this cycling, friction is rising because speed is being dramatically increased. As the friction goes up so does the temperature
of the associated components. A high temperature composite bearing
material can resist these expansion phenomena and as a result offer
better long term wear, improved bearing durability, and less seizure opportunity than conventional metal bearing materials.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
PolyLube® hard at work.
18
GUIDE ROD BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
PRODUCT DESCRIPTION
<<< 1 COLOR
PMS 1795 RED
REVERSE TEXT
1PMZ-VCF¡(VJEF3PE#FBSJOHTBSFEFTJHOFEBTSFQMBDFNFOUTGPSUSBEJUJPOBM
NFUBMMJDHVJEFSPECFBSJOHNBUFSJBMT3FQMBDJOHDPOWFOUJPOBMNFUBMMJDHVJEFSPE
bearings with a PolyLube guide rod bearing is a straight-forward change out.
Typical replacement programs where metallic guide rod bearings are replaced
are driven from one or a combination of several of the following factors.
1PMZ-VCF(VJEF3PE#FBSJOHTBSFDPNNPOMZBWBJMBCMFJOUXPGPSNBUTB1PMZ-VCF
<<< BLACK
CFBSJOHVUJMJ[JOHBHMBTTMJOFSPSB1PMZ-VCFCFBSJOHVUJMJ[JOHB15'&GBCSJDMJOFS
The most common PolyLube guide rod bearing in use today is the glass liner
EVFUPUXPQSJNBSZQFSGPSNBODFFOIBODFNFOUTPWFSUIF15'&GBCSJDMJOFE
bearing: the frictional response under start-up conditions and the transfer of
15'&UPUIFXFBSTVSGBDF
COMPARISONS TO COMMON GUIDE ROD BEARING MATERIALS
<<< REVERSED
SINTERED (PM) STRUCTURE BRONZE
4JOUFSFEQPXEFSNFUBM 1. TUSVDUVSFCFBSJOHTSFMZPOBOJOUFSOBMMVCSJDBOUUIBU
is entrapped into the metallic structure as it undergoes the sintering process.
As the bearing is cycled the lubricant migrates to the wear surface as a natural
function of compression and thermal expansion which forces the lubricant to
flow to the area of bearing wear, but also as the bearing itself is worn away and
the lubricant finds itself in contact with the pin material. Several problems exist
for this type of bearing material.
Examples of current Guide Rod Bearings.
“PolyLube® Guide Rod Bearings offer
improved stick-slip properties and a
reduction in shaft scoring.”
First, these bearings have a poor load capacity in either dynamic or static conditions. In linear slide block applications, this load capacity can become increasingly problematic. As the load on the bearing assembly increases, the bearings
will wear to accommodate the emerging load pattern during the bearing’s cycle.
As this process advances, the bearing assembly’s accommodation will translate
into increased slop in the slide block itself, and will ultimately result in a slide
block that is no longer cycling per the manufacturer’s requirements as well as
causing increased seal wear from piston misalignment.
REASONS TO DESIGN WITH POLYLUBE® GUIDE ROD BEARINGS:
r*NQSPWFETUJDLTMJQQSPQFSUJFT
r*ODSFBTFJOMPBEDBQBDJUZPGCFBSJOH
r0QUJNBMGSJDUJPOBMSFTQPOTFEVSJOH
cycling
r&OIBODFEDPSSPTJPOSFTJTUBODF
r4JHOJàDBOUSFEVDUJPOJOTIBGUTDPSJOH
r5PMFSBODFPGNPSFDPTUFGGFDUJWF
shaft finishes
r&YUFOTJPOJOUIFCFBSJOHMJGF
r-PXFSJOXFJHIU
r3FEVDUJPOJOCFBSJOHQSPàMF
r &MJNJOBUFTHBMWBOJDSFBDUJPOT
r(SFBUMZJNQSPWFETJEFMPBE
misalignment capacity
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
19
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
GUIDE ROD BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
1 COLOR
COMPARISONS TO COMMON<<<GUIDE ROD BEARING MATERIALS
SINTERED (PM) STRUCTURE BRONZE – CONTINUED
PMS 1795 RED
REVERSE TEXT
Second, sinter structure bronze bearings have a lubrication mechanism that is
both unreliable and easy to deplete. This means that shaft scoring, high friction,
anEIJHIXFBSBSFBMMBOUJDJQBUFEXJUIUIFTFCFBSJOHNBUFSJBMT1.TUSVDUVSF
bearings must wear in order to continue to transfer lubricant to the wear
surface. In linear slide applications the surface area that must be covered with
lubricant is significantly greaterBLACKthan what is seen in oscillatory or rotational
<<<
movement environments. As such, the frictional response and wear patterns
PG1.TUSVDUVSFCFBSJOHTEFHSBEFNVDINPSFSBQJEMZUIBOIJHIFSQFSGPSNBODF
bearing materials.
Example of a worn metal backed bearing.
COMPARISONS TO COMMON GUIDE ROD BEARING MATERIALS
METAL-BACKED
REVERSED
<<<
This family of bearing materials is divided into two product types: the first is
true ring structure metal backed bearings and the second is split seam
KPVSOBMCFBSJOHT3JOHTUSVDUVSFCFBSJOHTBSFFYQFOTJWFUPNBOVGBDUVSFHJWFO
the means by which the bearing liner is inserted into the bearing ID. The labor
required to complete this process, as well as the necessary secondary labor to
manufacture the bearing to the tolerances required, result in an overly expensive
bearing.
The second type of metal-backed bearing is the more common split seam
journal bearing. This bearing exhibits good frictional response during start up
DPOEJUJPOTCVUJTQSPOFUPFYDFTTJWFXFBS5IF15'&PWFSMBZJTWFSZUIJO UZQJDBMMZ
only 0.001") and is quickly worn away in linear motion applications where the
TVSGBDFBSFBUIBUUIF15'&NVTUCFUSBOTGFSSFEUPJTHSFBUFSUIBOUIFTVSGBDF
area of a conventional rotational or oscillatory application. In addition, start-up
running clearances change very quickly in metal-backed bearings due to the thin
TPGU15'&PWFSMBZPOUPQPGUIFCSPO[FJOUFSTUSVDUVSFCFJOHTDSVCCFEPGGPGUIF
bearing bore surface. Strict running clearances quickly disappear as the liner
wears and tries to stabilize. Depending upon shaft finishes, wear simply accelerates resulting in unwanted clearances and assembly looseness. A PolyLube®
composite self-lubricating bearing offers minimal break-in and reliable self-lubrication through application life.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
“With metal-backed journal
bearings, startup running clearances
change quickly due to the thin and
soft PTFE overlay on top of the
bronze interstructure being scrubbed
off the bearing surface.”
20
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
GUIDE ROD BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
1 COLOR
COMPARISONS TO COMMON<<<GUIDE ROD BEARING MATERIALS
THERMOPLASTIC
PMS 1795 RED
REVERSE TEXT
A common and low cost guide rod bearing material is thermoplastics. These
type of bearing materials share most of the design and performance limitations
UIBU1.TUSVDUVSFNFUBMCFBSJOHTEPCFDBVTFUIFUIFSNPQMBTUJDCFBSJOHNBUFSJBM
JUTFMGJTTJNJMBSJOJUTTUSVDUVSFBTUIBUPGB1.NFUBMMJDCFBSJOH5IFSNPQMBTUJDT
however have two additional problems associated to linear motion environments.
<<< BLACK
First, in applications where the slide velocity is high, a thermoplastic guide rod
bearing does not tolerate the heat generated from such quick response requirements. The most common thermoplastic bearing grade materials will bind on the
shaft and actually begin to break down mechanically as the bearing is cycled.
The amount of lubricant and fillers will play a dynamic role in the relationship
between mechanical and performance degradation as it relates to velocity.
Thermoplastic bushings are prone to cold flow.
Second, thermoplastic bearing materials are prone to cold flow. Under constant
<<< REVERSED
load many thermoplastic guide
rod bearings will exhibit creep. This creep will
result in slop in the bearing assembly and will negatively effect any precision
the slide block is expected to maintain.
BLACK DEBRIS SHAFT DEPOSITION
In some linear motion application environments, a black debris develops on
the distal and proximal ends of the shaft during normal cycling conditions. This
EFCSJTJTDPNNPOMZTFFOXIFOBTJOUFSFE15'&MJOFECFBSJOHJTVTFE
Worn guide rod from a center lined PTFE bearing.
This debris is most commonly the result of a complex interaction between the
pin material itself, the liner selection, and the rate of deceleration of the bearing
assembly. In some linear guide applications, the weight of the bearing assembly itself creates a macro-mechanical edge rolling condition as the assembly
EFDFMFSBUFT'PSBTJOUFSFE15'&MJOFECFBSJOH OPUBGBCSJD15'&MJOFECFBSJOH this deceleration causes parts of the bearing liner to roll as the motion reverses
JUTFMG5IFOBUVSFPGUIFSFTJOUIF15'&JTFOUSBQQFEXJUIJODBODSFBUFUIFQPUFOtial for the resin itself to bind against the shaft. As this phenomena is repeated,
the liner will fatigue and begin to transfer macroscopic portions of the liner onto
UIFTIBGUEVFUPUIFUIJOTPGU15'&PWFSMBZPOUPQPGUIFCSPO[FJOUFSTUSVDUVSF
being scrubbed off of the bearing bore surface. Strict running clearances quickly
disappear as the liner wears and tries to stabilize. Depending upon shaft finishes,
wear simply accelerates resulting in unwanted clearances and assembly looseness. A PolyLube® composite self-lubricating bearing offers minimal break-in and
reliable self-lubrication through application life.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
“In applications where the slide
velocity is high, a thermoplastic
guide rod bearing does not tolerate
the heat generated from such quick
response requirements.”
21
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
GUIDE ROD BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
1 COLOR
<<< – CONTINUED
BLACK DEBRIS SHAFT DEPOSITION
PMS 1795 RED
REVERSE TEXT
This debris deposition is application specific and is not seen in all application
environments. In other application environments, the black debris is seen in
SFMBUJPOUPTJOUFSFE 1. TUSVDUVSFCSPO[FPSCSBTTCFBSJOHT*OUIJTDBTF UIF
black discoloration is not purely a deposition of material onto the shaft, but
rather a scoring effect common to ring structure bearings that have a low
tolerance for missing lubricant or contamination.
<<< BLACK
The solution to an application
where liner debris is being deposited on the shaft
is to alter the bearing’s wear surface to a non-resinous and non-metallic liner.
In these cases, Polygon recommends transfer to one of its PolyLube® fabric
lined CFBSJOHTTVDIBTUIF1PMZ-VCF¡.31PS;4FSJFTCFBSJOHT5IFTFCFBSJOHT
JODPSQPSBUFIJHIUFOBDJUZ15'&àMBNFOUTJOUIFJSDPOUJOVPVTBSDIJUFDUVSF5IJT
JTJODPOUSBTUUP15'&SFTJOPVTTZTUFNTXIJDISFMZPOFJUIFSBTJOUFSFEQPXEFS
GPSNPGUIF15'&QPMZNFSPSUPBOPUIFSSFTJO TVDIBTBDFUBM XJUI15'&àCFST
randomly dispersed within the resin itself.
Polygon cylinder guide rod bushing with machined seal
groove.
<<< REVERSED
5IF1PMZ-VCFCFBSJOHTUIBUIBWFIJHIUFOBDJUZ15'&àMBNFOUTJOUIFJSBSDIJUFDture allow for the bearing assembly to undergo aggressive deceleration condiUJPOTXJUIPVUEFQPTJUJOHUIF15'&PSUIFSFTJODBSSJFSNFEJVNPOUPUIFTIBGU
This is because the wear surface of the fabric lined bearings utilize the filaments themselves without reliance on a resinous impregnation.
POLYLUBE ID SEAL CONFIGURATIONS
Incorporating T-lip wiper seals, radial shaft seals, o-rings or any other similar
JOUFSOBMTFBMJOHTZTUFNJTOPUBQSPCMFNGPS1PMZ-VCF(VJEF3PE#FBSJOHT
Polygon’s internal fabrication capabilities allow for easy and economical
incorporation of ID features required to install common sealing systems.
5XPMJOFSUIJDLOFTTFTBSFBWBJMBCMFJOUIFTUBOEBSE1PMZ-VCF15'&UBQFMJOFE
CFBSJOHDPOàHVSBUJPOUIFUIJDLMJOFSCFJOHTUBOEBSEBOEBUIJDL
liner also being available for applications where seal geometry might require
the introduction of a thicker liner to accommodate a unique ID feature. The
uUIJDLMJOFSDBOBMTPCFVTFEJOBQQMJDBUJPOTXIFSFCPSJOHUIF*%NJHIU
be required in order to achieve tighter tolerances in an effort to address sizing
and minor misalignment conditions.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
Cut-away photo of guide rod bushing with machined
grooves.
“The solution to an application
where liner debris is being deposited
on the shaft is to alter the bearing’s
wear surface to a non-resinous and
non-metallic liner.”
22
GUIDE ROD BEARINGS
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
1 COLOR
<<<
POLYLUBE® FABRICATION CAPABILITIES
PMS 1795 RED
REVERSE TEXT
One common fabrication detail seen on guide rod bearing applications deal
XJUIDPSOFSSBEJVTFTPOJOUFSOBMBOEFYUFSOBMHSPPWFT#FDBVTF1PMZHPOVTFT
a diamond wheel or groove tool to form the grooves we need to have at least
BDPSOFSSBEJVT8IFOUISFBETBSFVTFEUIFSFJTVTVBMMZDMFBSBODF
involved. When assembled with the mating part the bearing could shift to one
side or the other impacting the location of the bearing surface in relation to the
piston shaft. This could have a negative impact on wear.
<<< BLACK
The only other fabrication issue commonly seen on incoming prints is a surface
àOJTIDBMMFEPVUPOUIFJOUFSOBMEJBNFUFS5IJTJTUZQJDBMMZSFMBUFEUPBO0&.T
historical use of machined bronze bearings in the application. Since the bronze
is machined from a solid piece or casting, the surface finish is called out since
it is related to the speeds and feeds of their fabrication process. The wear surface on PolyLube® bearings is not machined so the surface finish call out can
be removed from fabrication requirements.
PolyLube® flanged face guide rod bearing.
<<< REVERSED
1PMZHPOJTDBQBCMFPGIPMEJOHB5*3*%UP0%XJUIJOBOETUSBJHIUEJBNeters to +/-.0005".
“The high strength backing permits
the use of a thin wall (1/16" to 1/18")
MECHANICAL AND PHYSICAL PROPERTIES
1PMZ-VCF(VJEF3PECFBSJOHTBSFNBOVGBDUVSFECZBàMBNFOUXJOEJOHQSPDFTT
that results in a continuous fiberglass filament backing ensuring excellent
mechanical properties (especially fatigue resistance). The filament wound
fiberglass structure uses a high strength, corrosion resistant epoxy resin as the
matrix material. The high strength backing permits the use of a thin wall (1/16"
to 1/8") bearing which can often reduce the size and weight of the finished
bearing assembly. This family of materials exhibits exceptional dimensional
TUBCJMJUZBOEQFSGPSNBODFQSFEJDUBCJMJUZPWFSXJEFUFNQFSBUVSFSBOHFT ™ž' PHONE
800.918.9261
WEBSITE
polygoncomposites.com
which can often reduce the size and
weight of the finished bearing.”
23
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
GUIDE ROD BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
GUIDE ROD BEARINGS
1 COLOR
MECHANICAL AND PHYSICAL<<<PROPERTIES (CONTINUED)
PMS 1795 RED
REVERSE TEXT
5IJTCFBSJOHTPQFSBUJOHUFNQFSBUVSFSBOHFJT™ž'.BYJNVNDPOUJOVPVT
PQFSBUJPOBMTVSGBDFUFNQFSBUVSFGPSUIFTUBOEBSEGPSNVMBUJPOJTž' EFQFOEing upon load characteristics. The bearing has been heat stabilized at these
temperatures, so that little dimensional change will occur in the bearing during
operation. In a free state, the coefficient of expansion of the PolyLube® Guide
3PE#FBSJOHJTY-6JOJOž' MPXFSUIBOTUFFMBOENPTUNFUBMT
All PolyLube® bearings can be machined and used in
guide rod applications
<<< BLACK
GLASS TAPE BEARING
Ultimate Compression Strength (PSI)
70,000
Unit Load Limit (PSI)
7,000
Temperature Range (Standard Formulation)
± 325°F
Coefficient Of Thermal Expansion (in/in/°F)
4.8 x 10¯6
<<< REVERSED
2
J^[hcWb9edZkYj_l_jo8JKš_d%^hš<j
š–<
'$.#($)
Water Absorption (2 Hours)
0.12%
Water Absorption (24 Hours)
0.16%
Specific Gravity
1.95
Polygon has extensive in-house machining capability to
meet application needs.
MRP BEARING
Ultimate Compression Strength (PSI)
70,000
Unit Load Limit (PSI)
30,000
Temperature Range (Standard Formulation)
± 325°F
Coefficient Of Thermal Expansion (in/in/°F)
4.8 x 10¯6
J^[hcWb9edZkYj_l_jo8JKš_d%^hš<j2š–<
'$.#($)
Water Absorption (2 Hours)
0.12%
Water Absorption (24 Hours)
0.16%
Specific Gravity
Machined grooves for seals provide protection in
contaminated environments.
1.87
See MRP for full specifications.
PolyLube bearings bring lifetime greaseless operation to
linear motion applications.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
24
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
POLYGON THRUST BEARINGS
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
POLYGON THRUST BEARINGS
COLOR
PolyLube WTM™ is a material that<<<
has1 been
successful in the harsh environments present during
operation of agricultural implements. The proprietary material used in the WTM thrust bearings
allows Polygon Company to produce a thrust bearing capable of operating maintenance free under
high loads. The thrust bearings are available in sizes ranging from 0.25 inches (6.35 mm) up to 12
inches (305 mm) and can also be manufactured to specific thicknesses to handle the dimensional
constraints of each application.
PMS 1795 RED
REVERSE TEXT
The recommended maximum design pressure for the WTM™ thrust bearings is 6,000 psi for application that will be used in environments relatively free of contamination. Equipment running in more
<<< BLACK
harsh environments should be designed to load the thrust bearing to a maximum pressure of 4,000
psi. For each case, the bearing can operate greaseless and results in a maintenance free joint.
PolyLube WTM™ thrust bearings are well suited for use in
caster applications.
Optimal performance is achieved with roughness averages near 32 microinches for machined
surfaces. Painted and machined surfaces with higher surface finished may be used, but will result in
slightly higher rates of wear. Please contact you PolyLube Sales Engineer or Applications Engineer
to discuss your specific application conditions and mating components.
<<<byREVERSED
Some performance advantages held
the PolyLube WTM™ vs. most thermoplastic materials use
to handle thrust loads are elevated tolerance to contamination, higher design load capacities, low
moisture absorption, and lower thermal expansion. The swelling due to temperature or humidity
will not cause the issues that have been encountered in the past with thermoplastics.
Traditional metallic thrust bearings result in galling and add to the contamination transferred to the
bearing. The PolyLube WTM™ will eliminate the damage that occurs on the mating components
resulting in lower warranty costs. The debris generated from the PolyLube WTM™ will not harm the
corresponding PolyLube MRP bearing used in your equipment.
PolyLube WTM™ thrust bearings require no grease or grease
flushing, making them the perfect companion for PolyLube
MRP journal bearings.
KEY ADVANTAGES
r Permanent lubrication incorporated into the entire bearing structure
r Flexible manufacturing process allows for highly customized sizing
POLYGON WTM™ THRUST BEARINGS
Min ID (Dimension A)
0.5 inches
Max OD (Dimension B)
12 inches
Max ID to OD (Dimension C)
2 inches
Min Thickness (Dimension D)
0.036 inches
Machineability
Fair
Temperature Range
0.26%
Unit Load Limit
800.918.9261
D
C
-100° to 350°F
Water Absorption (24 hours)
PHONE
B
A
Dimension guide
6000 psi
WEBSITE
polygoncomposites.com
25
BEARING DESIGN PRINCIPLES
Versatile high load, low friction composite bearings.
PV CALCULATIONS
PV (Pressure & Velocity) is the most common empirical tool to use when comparing and contrasting bearing performance. “P” is related to pressure or pounds per square inch on the projected
bearing area, while “V” is velocity in feet per minute of the wear surface. Knowing the PV limit of
a bearing, the designer can determine the loads and surface running speeds under which a bearing
can safely operate. Since heat generated by friction is one of the major causes of degradation in
liners, evaluation of the operating conditions of a fiberglass-reinforced, composite journal bearing
requires that you know the approximate temperature generated on or near the actual wear surface.
The temperature rise is also dependent on the running speed and is not a linear function of the PV
product.
As a guideline, Polygon specifies a 25,000 PV average limit for the PolyLube® bearings. Test
results conducted at 15,000 PV gave only 0.002" wear after 10 million cycles, ±25° oscillation run
at 60 cpm and 343 pounds radial load. For special applications, 50,000 PV is possible.
FOR A PRACTICAL ILLUSTRATION OF APPLIED AND DEFINED PV CALCULATIONS,
REFERENCE THIS ILLUSTRATION:
CALCULATING SLEEVE BEARING
PV LIMIT
Example: .750" Shaft @200 rpm
85.0 lb. total load, bearing
length .750”
V = 0.262* x rpm x diameter
= 0.262 x 200 x .750 = 39.3 ft/min
P = total load / projected area (A)**
A = .750 (shaft) x .750 (bearing length)
= .562 in.2
P = 85.0 lbs. / .562 in.2
= 151.2 psi
PV = 151.2 psi x 39.3 ft/min
= 5,942 psi* ft/min
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
26
BEARING DESIGN PRINCIPLES
Versatile high load, low friction composite bearings.
MISALIGNMENT CONDITIONS
Many applications undergo regular stressing of the bearing corners due to a misalignment condition. Should that condition be irregular, the existing PolyLube® series bearings are acceptable. It
is important; however, to understand how misalignment impacts bearing performance and what
conditions are identified and analyzed by Polygon’s PolyLube application engineers. Misalignment
conditions create a non-linear pressure area and significantly increase the edge stresses on the
bearing. As a result, premature fatigue cracking can occur. The schematic below illustrates both conditions. For PolyLube bearings, concerns with edge stress and fatigue cracking become acute as the
effective misalignment increases to 0.015 in/in or 0.86 degrees. Beyond that level, a different backing construction can be used to increase the bearing’s resistance to impact and resulting fatigue.
SHAFT
ANGLE
A
BEARING
PHONE
800.918.9261
EFFECTIVE
MISALIGNMENT
žh
JOJO
žh
JOJO
žh
JOJO
žh
JOJO
SHAFT
ANGLE
A
B
A-A PRESSURE
ANGLE
B
LINEAR
PRESSURE
AREA
B-B PRESSURE
WEBSITE
polygoncomposites.com
BEARING
A
A
B
B
A-A PRESSURE
PARABOLIC
PRESSURE
AREA
B-B PRESSURE
27
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
BEARING DESIGN PRINCIPLES
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
DESIGNING FOR EDGE LOADING
As with liner construction, in order
optimize a composite bearing’s impact resistance, the bearing
<<<to1 COLOR
must also take advantage of the performance drivers that are related to the wind angle of the
fiberglass backing. The fiberglass backing’s orientation off of the neutral axis is a significant driver in
the finished performance of the bearing itself. Most composite bearing companies utilize winding
equipment that produces bearings between a 40 and 55 degree wind angle. For most applications
this is acceptable; however, for applications where repeated high stress/strain is of concern, the
backing can be further optimized by positioning the wind angle closer to a theoretical 90 degree
wind angle. This type of performance optimization is what Polygon does that other companies do
not. Our manufacturing equipment is all precisely computer controlled.
α = WIND ANGLE
PMS 1795 RED
REVERSE TEXT
<<< BLACK
CONTINUOUS FIBERGLASS
FILAMENT WINDING
Illustration of wind angle.
ELASTICELASTIC
MODULUS
MODULUS
(% of maximum)
(% of maximum)
MODULUS OF ELASTICITY AT VARIOUS WIND ANGLES
100
MODULUS OF ELASTICITY AT VARIOUS WIND ANGLES
80
100
Ex
Ey
Gxy
80
60
<<< REVERSED
Ex
Ey
60
40
Traditional
Gxy
Wind Angle
PolyLube
High Strength
Traditional
Wind Angle
Wind Angle
40
20
20
20
40
60
80
100
80
100
PolyLube
High Strength
Wind Angle
WIND ANGLE
20
40
60
WIND ANGLE
STRENGTH
STRENGTH
(% of maximum)
(% of maximum)
STRENGTH PROPERTIES AT VARIOUS WIND ANGLES
100
80
100
STRENGTH PROPERTIES AT VARIOUS WIND ANGLES
FxT
FyT
FxC
FyC
Fxy
FxT
60
80
FyT
FxC
FyC
Traditional
Fxy
Wind Angle
40
60
20
40
20
PolyLube
High Strength
Traditional
Wind
Angle
Wind Angle
20
40
60
80
100
80
100
WIND ANGLE
20
40
60
PolyLube
High Strength
Wind Angle
WIND ANGLE
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
28
BEARING DESIGN PRINCIPLES
<<< 2 COLOR
2009 POLYGON LOGO IDENTITY.
PMS 1795 RED
PMS COOL GRAY 11
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
LOAD CAPACITY
Polygon’s proprietary process of fiberglass
<<< 1 COLOR filament
winding results in exceptionally strong structures
that can support the bearing surface more than
adequately. Loading in excess of 30,000 PSI can be
tolerated in many situations, provided the design
and the conditions of service are fully outlined
and analyzed by a Polygon bearing specialist.
Fatigue is not a limiting factor in the use of
PolyLube® bearings. Frequent laboratory tests
<<< BLACK
have shown that the bearing is often more
fatigue-resistant than the shaft. The typical
average design pressure for high duty cycle
applications is 8,000 PSI.
POLYGON POLYLUBE MRP
PMS 1795 RED
REVERSE TEXT
PV=11,416 CONTINUOUS ROTATION
0.0035
WEAR IN INCHES
0.003
0.0025
0.002
0.0015
0.001
0.0005
25
50
75
100
125
150
175
200
225
250
TIME IN HOURS
MECHANICAL AND PHYSICAL PROPERTIES
BEARING COMPARISON
PV=11,416
CONTINUOUS
POLYLUBE®
MRPROTATION
SERIES
0.0035
WEAR ANALYSIS
0.003
WEAR IN INCHES
The PolyLube MRP bearing can withstand
<<< REVERSEDstatic
loads of approximately 70,000 PSI and dynamic
loads as high as 30,000 PSI. A general design
approach for application with oscillating pins
and angular force vector changes less than 45
degrees should be designed to an average working
pressure of 8,000 PSI. Polygon MRP bearings will
allow pressure spikes as high as 12,000 PSI during
approximately 5% of the operational life. Elastic
deformation will occur at the rate of 0.001" per
1,860 PSI of pressure. Dry running applications can
be operated at speeds as high as 10 surface feet
per minute. Please consult a Polygon Application
Engineer with any questions regarding loading
conditions and bearing performance.
0.0025
0.002
0.0015
0.001
0.0005
50
100
150
TIME IN HOURS
200
250
POLYLUBE F
BEARING WEAR
During the initial break-in period of a PolyLube
bearing, a transfer film is created on the mating
surface. In some operations, as much as 0.001"
of wear may occur during this period, while in
other operations, break-in wear may be negligible. For more detail on the break-in period and
the mechanism by which each bearing achieves
sufficient film transfer, refer to the respective
product inserts.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
29
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
LENGTH
BEARING DESIGN PRINCIPLES
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
OD
ID
FLANGE
THICKNESS
FLANGE
OD
LENGTH
POLYLUBE BEARING
ASSEMBLY
1 COLOR
When a PolyLube® bearing is press<<<
fit into a housing, it creates a highly loaded interference
condition. This is possible because of the elastic properties of the bearing’s backing material.
Press fits on wall thicknesses up to 1/8” have demonstrated that the close-in ratio is one-toone (0.001 press yields a 0.001 close in). The amount of interference between the bearing and
housing is directly proportional to the amount of force needed to install the bearing. Minimizing interference fits will offer a larger array of installation options for OEMs. This is especially
important for applications requiring the installation of new pins and bearings in the field.
Due to thermal lag, the bearing wear surface may be hotter than the adjacent housing, when
heat is generated from running friction. As a result, the installed bearing may expand inward,
<<< BLACK
reducing the shaft clearance.
PMS 1795 RED
REVERSE TEXT
For optimum performance shaft clearances should be increased for dry running applications
with high velocities. Fluid cooling and lubricants will reduce the operating temperatures,
permitting tighter shaft clearances. Heat transfer through the bearing wall is inversely proportional to the wall thickness. The thinner the wall, the greater the transfer of heat. Thermal
YedZkYj_l_jo"\eh[nWcfb["_i'$.je($)8jkš_d%^hš\j2š–<$
ID
T
15˚-28˚
LEAD-IN
CHAMFER
d
R15˚-45˚
O.D. CHAMFER
OR BREAK CORNER
(NO BURRS)
POLYLUBE FLANGE BEARING
D
LENGTH
BULL NOSE RADIUS
Chamfer can be made
with several different
designs.
POLYLUBE
THRUST
WASHER
OD
ID
<<< REVERSED
PolyLube Bearings are typically installed
prior to painting processes to increase installation
efficiency, decreasing costs due to overspray in the bore. E-coat and powder coat processes
with temperatures as high as 500°F may be employed with the bearings already installed. It is
recommended to use a plug in the bearing ID during abrasion and paint processes to maintain
the integrity and frictional response of the bearing.
15˚-28˚
POLYLUBE
BEARING
1/16”
min.
(1.6mm)
Optional
O-ring for
Retention
Op
L
R
T
PIN SELECTION
PolyLube bearing wear is a function of the interaction between the wear materials in the liner
and the pin. The majority of pins used in conjunction with PolyLube bearings are carbon steel.
The grades range from 1018 to 4140. Pin selection is most important for designers to ensure
the shear and tensile strengths are suitable for the specific application. The major properties
of concern for Polygon are the surface finish, hardness, and corrosion resistance. Each of these
pin characteristics contribute to the bearing wear.
d
D
STANDARD BEARING
INSTALLATION
POLYLUBE
THRUST WASHER
SYSTEM LUBRICATION INFORMATION
Since lubrication is inherent in the bearing surface of PolyLube, engineers do not have to worry
about these bearings drying out, causing shaft seizure and costly repairs. Because lubricants are
not required, shaft corrosion should be a consideration during selection.
Optional
O-ring for
Retention
15˚-28˚
1/16” min.
(1.6mm)
Op
L
Lubricants may actually reduce wear rates by up to eight times. Liquid lubricants can carry
away heat and reduce the coefficient of friction. Greases can be used to help prevent corrosion and keep contamination out of the housing when maintained properly. Additional
lubrication can increase the performance characteristics of composite bearings. The major
drawback for using lubricants is forcing the end user to maintain the joint. Lubricants can
often trap contamination which act as a grinding compound to increase wear, adversely
affecting the joint ultimately.
STANDARD BEARING
INSTALLATION
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
30
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
BEARING DESIGN PRINCIPLES
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
SURFACE FINISH
1 COLOR
The optimum pin surface finish is <<<
a roughness
average of 32 microinches. The mechanism allowing the bearing to operate in a dry condition is the transfer of the PTFE from the bearing to the
pin. The peaks and valleys of the surface finish determine how much PTFE is transferred and if
it will remain imbedded into the pin. During the break-in period, the bearing liner is shearing
some of the peaks and filling the valleys with PTFE. The typical amount of bearing break-in wear
running with 32 in Ra pin is approximately 0.001 inches. Following the PTFE transfer, the wear
rate will stabilize to an approximate rate of 0.001 inches/35,000 cycles. The rate of wear given
is intended to be a guide and will be affected based on load, speed, hardness, surface finish,
contamination, and oscillation angles.
PMS 1795 RED
REVERSE TEXT
<<< BLACK
Polygon has many applications currently using pins rougher than the recommended surface
finish. Pins with surface finishes higher than recommended will experience both a higher initial
coefficient of friction and a longer break-in period due to the additional PTFE needed to fill
the deeper valleys. After the break-in period has been completed, the rate of wear and the
coefficient of friction will behave similarly to the steady state experienced using the optimum
pin finish. The trade-off to the cost savings for using a rougher pin is additional clearance after
the break-in period. Some of the more extreme examples of higher surface finish pins are cold
<<< REVERSED
drawn 1018. The surface finish of these
pins range from 50 – 120 microinches R.A.
Pins with too smooth a surface finish will adversely affect the bearing. The problem with using
pins smoother than 16 in Ra, is the inability for the surface finish to hold the transferred PTFE.
The result is a continuous break-in period leading to a faster rate of bearing wear compared to
joints using pins with the recommended surface finishes. It is better for the PolyLube® bearings
to have pins with a surface finish greater than 32 microinches R.A. than a surface finish lower
than 16 microinches R.A.
Compatibility with rougher pin finishes
allows the PolyLube MRP bearing to
decrease pin costs. 16 µin pins vs 125 µin
result in only 0.003 inches additional
wear over the life of most applications.
HARDNESS
Pin hardness requirements are dependent upon the operating conditions of the equipment.
Softer pin materials, such as stainless steel, may be used when contamination is expected to
be very low or the bearing is suitably protected with a seal or due to location. Empirical and
laboratory data confirm the compatibility of the various PolyLube liners with softer steel grades
such as, 304, 316 and 1018, based on absence of pin wear.
Applications operating in moderate to highly contaminated environments will require pins with
greater surface hardness. Polygon recommends a pin surface hardness of 50 Rockwell C. A hard
surface will be less likely to score when contamination is rolled in the contact area between the
pin and bearing. Pin wear is caused by aggressive contamination rather than materials contained
in the PolyLube bearing liners.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
31
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
BEARING DESIGN PRINCIPLES
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
CORROSION RESISTANCE
1 COLOR
Pin corrosion will affect the surface
of the pin as well as the running clearance. As a pin
<<<finish
corrodes, there are a number of consequences to the operation of the joint. The three main
problems introduced into the joint are increased pin OD, rougher surface finish, and oxide
material contamination. The increased pin diameter could result in an interference fit and
increased torque needed to turn the pin. The increased roughness of the pin surface will serve
to additionally increase the torque required to operate the joint as well as increase the rate
of wear. The addition of contaminates, in the form of the metal oxide, will further degrade
the pin and bearing. Protecting the pin and bearing from contamination will lead to long term
predictable wear regardless of the frequency of operation of the equipment.
PMS 1795 RED
REVERSE TEXT
<<< BLACK
Polygon recommends a corrosion resistant surface treatment for pins used in dry running applications. Many years of success have been experienced with customers using Hard Chrome,
Electroless Nickel, and Nitrocarborization. Pins with these surface treatments will have
hardness in excess of the Polygon recommendations for moderate to highly contaminated environments. Thickness or depth of the treatment should be determined based on the chosen
materials. Typical values are 0.0005 inches for both thickness and white layer depths. These
values are not intended as recommendations, only as examples to allow designers a value to
<<< REVERSED
begin a conversation with pin suppliers.
Softer surface treatments are also in use with Polygon bearings. Yellow Zinc Dichromate (YZD)
is a cost effective alternative to the previous treatments given. YZD can be thought of as metal
paint. The coating will be removed in the contact area by the bearing very quickly. The break-in
period between the bearing and the base material will begin after the YZD has been worn
away. There will be some added wear resulting from worn away YZD acting as contamination.
Equipment seasonal in nature will also have a possibility of pin corrosion at the contact area.
The transferred PTFE will act as a corrosion inhibitor if a sufficient amount has been transferred
during the first season operation. The main purpose most designers state when using YZD is
corrosion protection for the surface not in contact with the bearing. The result is a decrease in
the migration of metal oxide particles into the joint compared to an untreated pin.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
PolyLube® is well suited to the high loads and the constant
corrosion found in agriculture.
PolyLube polymer structure handles corrosive liquids as well.
32
<<< 2 COLOR
PMS 1795 RED
PMS COOL GRAY 11
BEARING DESIGN PRINCIPLES
2009 POLYGON LOGO IDENTITY.
DO NOT: use any other colors than what is listed,
unless you get permission from Jim Shobert.
Versatile high load, low friction composite bearings.
DO NOT: use this logo with any fades or 3-D effects.
DO NOT: use any outlines or drop shadows.
ELECTRICAL PROPERTIES
Polygon also produces epoxy fiberglass
tubes to the UL-FW-G-10 specification. PolyLube®
<<< 1 COLOR
bearings exhibit similar electrical properties. The bearing wall provides dielectric strengths in
excess of 400 volts/mil.
PMS 1795 RED
REVERSE TEXT
FABRICATION GUIDELINES
The most common type of fabrication customers have questions about is how to cut composite bearing materials. Depending on how critical the squareness (perpendicularity) of the
<<< aBLACK
cut needs to be, on smaller bearings
standard chop saw can be used. The typical tolerance
for perpendicularity is 0.005" off the chop saw. Polygon recommends a diamond plated blade
tipped with 120 grit diamonds. A rougher grit (80) can be used but that will often times result
in a poorer surface finish. Polygon also recommends having the blade turning at between 15003000 rpm with a water-soluble coolant flooding the tube as it is being cut. This coolant will
allow the tube to be cut without burning the end, will extend the life of the diamond blade,
and will reduce the dust particulates generated during the cutting process.
On larger tubes, or when perpendicularity
<<< REVERSEDis critical, Polygon recommends cutting the tubes
on a standard lathe. In production, this type of cut is done by mounting a tool post grinder on
the cross slide and dividing the tube using a 120 grit diamond blade. A three jaw chuck is used
to turn the tube indicating the tube so that it turns true to the tool post grinder. The tool
post grinder is typically used at between 1500-3000 rpm and the tube is turned at 15-20 rpm
when divided. Once again, the same type of coolant system is recommended. In addition, it is
advisable to cut from the inside out whenever possible to eliminate the fraying of the liner on
the inside of the bearing.
Stock tube during processing.
“Tube post grinders along with
modern CNC lathes allow Polygon
to customize bearings to your
exact specs.”
Many times after the bearing has been cut, a deburring operation needs to take place. A very
simple deburring operation consisting of nothing more than spinning the part and holding a
piece of sand paper against the outside edge of the bearing will work quite well. The reverse
is also possible by mounting a piece of sand paper in a drill press spindle and running the part
onto the paper to remove any loose fibers caused by the cutting operation.
When turning the tubes on a lathe, Polygon recommends using a diamond tipped cutting insert. On our standard CNC lathe, the tube is turned at 2000-3000 rpm with a 0.003" per revolution feed rate. The depth of the cut is usually dependent on the length of the diamond tip
on the cutting insert (typically between 0.060"-0.100"). It is important when cutting fiberglass
using a diamond insert to again use a water soluble coolant to dissipate the heat generated
while cutting. Excessive heat will cause the bond between the diamond and the carbide insert
to fail, causing the tip to come off.
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
33
¼ HEAVY WALL DIMENSIONS
""
Hex or square ID available as well as flange bearings and secondary machining. Most tooling
available to make special sizes. ID’s from 20" down to .125". All measurements in inches.
BEARING PART
NUMBER
NOMINAL
ID
THE POLYLUBE® BEARING PART NUMBER SYSTEM
POLYLUBE
IDENTIFICATION
INSIDE
DIAMETER
SELECTED
LINER
OUTSIDE
DIAMETER
LENGTH
PWR
NOMINAL
ID x 16
M= MRP
G= GLASS TAPE
NOMINAL
OD x 16
x16
ID
OD
RECOMMENDED
HOUSING BORE
PRESS
FIT
RECOMMENDED
SHAFT SIZE
RUNNING
CLEARANCE
LENGTH
TOLERANCE
PWR08M16
1/2
0.5058
0.5088
1.0025
1.0045
1.000
1.002
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
+/- 0.010
PWR10M18
5/8
0.6309
0.6339
1.1276
1.1296
1.125
1.127
0.0005
0.0046
0.6250
0.6230
0.0013
0.0104
+/- 0.010
PWR12M20
3/4
0.7560
0.7590
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
+/- 0.010
PWR14M22
7/8
0.8811
0.8841
1.3777
1.3797
1.375
1.377
0.0006
0.0047
0.8750
0.8730
0.0014
0.0105
+/- 0.010
PWR16M24
1
1.0062
1.0092
1.5027
1.5047
1.500
1.502
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
+/- 0.010
PWR18M26
1-1/8
1.1314
1.1344
1.6278
1.6298
1.625
1.627
0.0007
0.0048
1.1250
1.1230
0.0016
0.0107
+/- 0.010
PWR20M28
1-1/4
1.2564
1.2594
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
+/- 0.010
PWR22M30
1-3/8
1.3816
1.3856
1.8779
1.8799
1.875
1.877
0.0008
0.0049
1.3750
1.3730
0.0017
0.0117
+/- 0.010
PWR24M32
1-1/2
1.5067
1.5107
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
+/- 0.010
PWR26M34
1-5/8
1.6318
1.6358
2.1280
2.1300
2.125
2.127
0.0009
0.0050
1.6250
1.6230
0.0018
0.0118
+/- 0.010
PWR28M36
1-3/4
1.7569
1.7609
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
+/- 0.010
PWR30M38
1-7/8
1.8820
1.8860
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
+/- 0.010
PWR32M40
2
2.0071
2.0111
2.5031
2.5051
2.500
2.502
0.0011
0.0051
2.0000
1.9980
0.0020
0.0120
+/- 0.010
PWR34M42
2-1/8
2.1333
2.1373
2.6292
2.6312
2.625
2.628
0.0012
0.0062
2.1250
2.1230
0.0021
0.0132
+/- 0.010
PWR36M44
2-1/4
2.2583
2.2623
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.2500
2.2480
0.0021
0.0131
+/- 0.010
PWR38M46
2-3/8
2.3835
2.3875
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
+/- 0.010
PWR40M48
2-1/2
2.5086
2.5126
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.5000
2.4980
0.0023
0.0133
+/- 0.010
PWR44M52
2-3/4
2.7588
2.7628
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.7500
2.7470
0.0024
0.0144
+/- 0.010
PWR48M56
3
3.0090
3.0130
3.5045
3.5065
3.500
3.503
0.0015
0.0065
3.0000
2.9970
0.0025
0.0145
+/- 0.010
PWR52M60
3-1/4
3.2592
3.2632
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.2500
3.2470
0.0026
0.0146
+/- 0.010
PWR56M64
3-1/2
3.5095
3.5135
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.5000
3.4970
0.0028
0.0148
+/- 0.010
PWR60M68
3-3/4
3.7597
3.7637
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.7500
3.7470
0.0029
0.0149
+/- 0.010
PWR64M72
4
4.0099
4.0139
4.5049
4.5069
4.500
4.503
0.0019
0.0069
4.0000
3.9970
0.0030
0.0150
+/- 0.010
PWR68M76
4-1/4
4.2601
4.2641
4.7550
4.7570
4.750
4.753
0.0020
0.0070
4.2500
4.2470
0.0031
0.0151
+/- 0.010
PWR72M80
4-1/2
4.5104
4.5144
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.5000
4.4970
0.0033
0.0153
+/- 0.010
PWR76M84
4-3/4
4.7606
4.7646
5.2552
5.2572
5.250
5.253
0.0022
0.0072
4.7500
4.7470
0.0034
0.0154
+/- 0.010
PWR80M88
5
5.0108
5.0148
5.5053
5.5073
5.500
5.503
0.0023
0.0073
5.0000
4.9970
0.0035
0.0155
+/- 0.010
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
34
¼ HEAVY WALL DIMENSIONS
""
Hex or square ID available as well as flange bearings and secondary machining. Most tooling
available to make special sizes. ID’s from 20" down to .125". All measurements in inches.
BEARING PART
NUMBER
NOMINAL
ID
THE POLYLUBE® BEARING PART NUMBER SYSTEM
POLYLUBE
IDENTIFICATION
INSIDE
DIAMETER
SELECTED
LINER
OUTSIDE
DIAMETER
LENGTH
PWR
NOMINAL
ID x 16
M= MRP
G= GLASS TAPE
NOMINAL
OD x 16
x16
ID
OD
RECOMMENDED
HOUSING BORE
PRESS
FIT
RECOMMENDED
SHAFT SIZE
RUNNING
CLEARANCE
LENGTH
TOLERANCE
PWR08M16
1/2
0.5058
0.5088
1.0025
1.0045
1.000
1.002
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
+/- 0.010
PWR10M18
5/8
0.6309
0.6339
1.1276
1.1296
1.125
1.127
0.0005
0.0046
0.6250
0.6230
0.0013
0.0104
+/- 0.010
PWR12M20
3/4
0.7560
0.7590
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
+/- 0.010
PWR14M22
7/8
0.8811
0.8841
1.3777
1.3797
1.375
1.377
0.0006
0.0047
0.8750
0.8730
0.0014
0.0105
+/- 0.010
PWR16M24
1
1.0062
1.0092
1.5027
1.5047
1.500
1.502
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
+/- 0.010
PWR18M26
1-1/8
1.1314
1.1344
1.6278
1.6298
1.625
1.627
0.0007
0.0048
1.1250
1.1230
0.0016
0.0107
+/- 0.010
PWR20M28
1-1/4
1.2564
1.2594
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
+/- 0.010
PWR22M30
1-3/8
1.3816
1.3856
1.8779
1.8799
1.875
1.877
0.0008
0.0049
1.3750
1.3730
0.0017
0.0117
+/- 0.010
PWR24M32
1-1/2
1.5067
1.5107
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
+/- 0.010
PWR26M34
1-5/8
1.6318
1.6358
2.1280
2.1300
2.125
2.127
0.0009
0.0050
1.6250
1.6230
0.0018
0.0118
+/- 0.010
PWR28M36
1-3/4
1.7569
1.7609
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
+/- 0.010
PWR30M38
1-7/8
1.8820
1.8860
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
+/- 0.010
PWR32M40
2
2.0071
2.0111
2.5031
2.5051
2.500
2.502
0.0011
0.0051
2.0000
1.9980
0.0020
0.0120
+/- 0.010
PWR34M42
2-1/8
2.1333
2.1373
2.6292
2.6312
2.625
2.628
0.0012
0.0062
2.1250
2.1230
0.0021
0.0132
+/- 0.010
PWR36M44
2-1/4
2.2583
2.2623
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.2500
2.2480
0.0021
0.0131
+/- 0.010
PWR38M46
2-3/8
2.3835
2.3875
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
+/- 0.010
PWR40M48
2-1/2
2.5086
2.5126
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.5000
2.4980
0.0023
0.0133
+/- 0.010
PWR44M52
2-3/4
2.7588
2.7628
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.7500
2.7470
0.0024
0.0144
+/- 0.010
PWR48M56
3
3.0090
3.0130
3.5045
3.5065
3.500
3.503
0.0015
0.0065
3.0000
2.9970
0.0025
0.0145
+/- 0.010
PWR52M60
3-1/4
3.2592
3.2632
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.2500
3.2470
0.0026
0.0146
+/- 0.010
PWR56M64
3-1/2
3.5095
3.5135
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.5000
3.4970
0.0028
0.0148
+/- 0.010
PWR60M68
3-3/4
3.7597
3.7637
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.7500
3.7470
0.0029
0.0149
+/- 0.010
PWR64M72
4
4.0099
4.0139
4.5049
4.5069
4.500
4.503
0.0019
0.0069
4.0000
3.9970
0.0030
0.0150
+/- 0.010
PWR68M76
4-1/4
4.2601
4.2641
4.7550
4.7570
4.750
4.753
0.0020
0.0070
4.2500
4.2470
0.0031
0.0151
+/- 0.010
PWR72M80
4-1/2
4.5104
4.5144
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.5000
4.4970
0.0033
0.0153
+/- 0.010
PWR76M84
4-3/4
4.7606
4.7646
5.2552
5.2572
5.250
5.253
0.0022
0.0072
4.7500
4.7470
0.0034
0.0154
+/- 0.010
PWR80M88
5
5.0108
5.0148
5.5053
5.5073
5.500
5.503
0.0023
0.0073
5.0000
4.9970
0.0035
0.0155
+/- 0.010
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
35
¼8 HEAVY WALL DIMENSIONS
""
Hex or square ID available as well as flange bearings and secondary machining. Most tooling
available to make special sizes. ID’s from 20" down to .125". All measurements in inches.
BEARING PART
NUMBER
NOMINAL
ID
THE POLYLUBE® BEARING PART NUMBER SYSTEM
POLYLUBE
IDENTIFICATION
INSIDE
DIAMETER
SELECTED
LINER
OUTSIDE
DIAMETER
LENGTH
PWR
NOMINAL
ID x 16
M= MRP
G= GLASS TAPE
NOMINAL
OD x 16
x16
ID
OD
RECOMMENDED
HOUSING BORE
PRESS
FIT
RECOMMENDED
SHAFT SIZE
RUNNING
CLEARANCE
LENGTH
TOLERANCE
PWR08M12
1/2
0.5058
0.5088
0.7525
0.7545
0.750
0.752
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
+/- 0.010
PWR10M14
5/8
0.6309
0.6339
0.8776
0.8796
0.875
0.877
0.0005
0.0046
0.6250
0.6230
0.0013
0.0104
+/- 0.010
PWR12M16
3/4
0.7560
0.7590
1.0026
1.0046
1.000
1.002
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
+/- 0.010
PWR14M18
7/8
0.8811
0.8841
1.1277
1.1297
1.125
1.127
0.0006
0.0047
0.8750
0.8730
0.0014
0.0105
+/- 0.010
PWR16M20
1
1.0062
1.0092
1.2527
1.2547
1.250
1.252
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
+/- 0.010
PWR18M22
1-1/8
1.1314
1.1344
1.3778
1.3798
1.375
1.377
0.0007
0.0048
1.1250
1.1230
0.0016
0.0107
+/- 0.010
PWR20M24
1-1/4
1.2564
1.2594
1.5028
1.5048
1.500
1.502
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
+/- 0.010
PWR22M26
1-3/8
1.3816
1.3856
1.6279
1.6299
1.625
1.627
0.0008
0.0049
1.3750
1.3730
0.0017
0.0117
+/- 0.010
PWR24M28
1-1/2
1.5067
1.5107
1.7529
1.7549
1.750
1.752
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
+/- 0.010
PWR26M30
1-5/8
1.6318
1.6358
1.8780
1.8800
1.875
1.877
0.0009
0.0050
1.6250
1.6230
0.0018
0.0118
+/- 0.010
PWR28M32
1-3/4
1.7569
1.7609
2.0030
2.0050
2.000
2.002
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
+/- 0.010
PWR30M34
1-7/8
1.8820
1.8860
2.1281
2.1301
2.125
2.127
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
+/- 0.010
PWR32M36
2
2.0071
2.0111
2.2531
2.2551
2.250
2.252
0.0011
0.0051
2.0000
1.9980
0.0020
0.0120
+/- 0.010
PWR34M38
2-1/8
2.1333
2.1373
2.3792
2.3812
2.375
2.378
0.0012
0.0062
2.1250
2.1230
0.0021
0.0132
+/- 0.010
PWR36M40
2-1/4
2.2583
2.2623
2.5042
2.5062
2.500
2.503
0.0012
0.0062
2.2500
2.2480
0.0021
0.0131
+/- 0.010
PWR38M42
2-3/8
2.3835
2.3875
2.6293
2.6313
2.625
2.628
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
+/- 0.010
PWR40M44
2-1/2
2.5086
2.5126
2.7543
2.7563
2.750
2.753
0.0013
0.0063
2.5000
2.4980
0.0023
0.0133
+/- 0.010
PWR44M48
2-3/4
2.7588
2.7628
3.0044
3.0064
3.000
3.003
0.0014
0.0064
2.7500
2.7470
0.0024
0.0144
+/- 0.010
PWR48M52
3
3.0090
3.0130
3.2545
3.2565
3.250
3.253
0.0015
0.0065
3.0000
2.9970
0.0025
0.0145
+/- 0.010
PWR52M56
3-1/4
3.2592
3.2632
3.5046
3.5066
3.500
3.503
0.0016
0.0066
3.2500
3.2470
0.0026
0.0146
+/- 0.010
PWR56M60
3-1/2
3.5095
3.5135
3.7547
3.7567
3.750
3.753
0.0017
0.0067
3.5000
3.4970
0.0028
0.0148
+/- 0.010
PWR60M64
3-3/4
3.7597
3.7637
4.0048
4.0068
4.000
4.003
0.0018
0.0068
3.7500
3.7470
0.0029
0.0149
+/- 0.010
PWR64M68
4
4.0099
4.0139
4.2549
4.2569
4.250
4.253
0.0019
0.0069
4.0000
3.9970
0.0030
0.0150
+/- 0.010
PWR68M72
4-1/4
4.2601
4.2641
4.5050
4.5070
4.500
4.503
0.0020
0.0070
4.2500
4.2470
0.0031
0.0151
+/- 0.010
PWR72M76
4-1/2
4.5104
4.5144
4.7551
4.7571
4.750
4.753
0.0021
0.0071
4.5000
4.4970
0.0033
0.0153
+/- 0.010
PWR76M80
4-3/4
4.7606
4.7646
5.0052
5.0072
5.000
5.003
0.0022
0.0072
4.7500
4.7470
0.0034
0.0154
+/- 0.010
PWR80M84
5
5.0108
5.0148
5.2553
5.2573
5.250
5.253
0.0023
0.0073
5.0000
4.9970
0.0035
0.0155
+/- 0.010
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
36
¼16 THIN WALL DIMENSIONS
""
Hex or square ID available as well as flange bearings and secondary machining. Most tooling
available to make special sizes. ID’s from 20" down to .125". All measurements in inches.
BEARING PART
NUMBER
NOMINAL
ID
THE POLYLUBE® BEARING PART NUMBER SYSTEM
POLYLUBE
IDENTIFICATION
INSIDE
DIAMETER
SELECTED
LINER
OUTSIDE
DIAMETER
LENGTH
PWR
NOMINAL
ID x 16
M= MRP
G= GLASS TAPE
NOMINAL
OD x 16
x16
ID
OD
RECOMMENDED
HOUSING BORE
PRESS
FIT
RECOMMENDED
SHAFT SIZE
RUNNING
CLEARANCE
LENGTH
TOLERANCE
PWR08M10
1/2
0.5058
0.5088
0.6275
0.6295
0.625
0.627
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
+/- 0.010
PWR10M12
5/8
0.6309
0.6339
0.7526
0.7546
0.750
0.752
0.0005
0.0046
0.6250
0.6230
0.0013
0.0104
+/- 0.010
PWR12M14
3/4
0.7560
0.7590
0.8776
0.8796
0.875
0.877
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
+/- 0.010
PWR14M16
7/8
0.8811
0.8841
1.0027
1.0047
1.000
1.002
0.0006
0.0047
0.8750
0.8730
0.0014
0.0105
+/- 0.010
PWR16M18
1
1.0062
1.0092
1.1277
1.1297
1.125
1.127
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
+/- 0.010
PWR18M20
1-1/8
1.1314
1.1344
1.2528
1.2548
1.250
1.252
0.0007
0.0048
1.1250
1.1230
0.0016
0.0107
+/- 0.010
PWR20M22
1-1/4
1.2564
1.2594
1.3778
1.3798
1.375
1.377
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
+/- 0.010
PWR22M24
1-3/8
1.3816
1.3856
1.5029
1.5049
1.500
1.502
0.0008
0.0049
1.3750
1.3730
0.0017
0.0117
+/- 0.010
PWR24M26
1-1/2
1.5067
1.5107
1.6279
1.6299
1.625
1.627
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
+/- 0.010
PWR26M28
1-5/8
1.6318
1.6358
1.7530
1.7550
1.750
1.752
0.0009
0.0050
1.6250
1.6230
0.0018
0.0118
+/- 0.010
PWR28M30
1-3/4
1.7569
1.7609
1.8780
1.8800
1.875
1.877
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
+/- 0.010
PWR30M32
1-7/8
1.8820
1.8860
2.0031
2.0051
2.000
2.002
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
+/- 0.010
PWR32M34
2
2.0071
2.0111
2.1281
2.1301
2.125
2.127
0.0011
0.0051
2.0000
1.9980
0.0020
0.0120
+/- 0.010
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
37
SINGLE SEAL
GROOVE
WIDTH
SINGLE SEAL
NOMINAL
ID
GROOVE
WIDTH
HOUSING
ID
OD
BORE
DIAMETER
PRESS
FIT
PIN
DIAMETER
RUNNING
CLEARANCE
0.5058
0.5088
1.1276
1.1296
1.125
1.127
0.0006
0.0046
0.5000
0.4980
0.0012
0.0103
BEARING
BEARING
OD
BEARING
ID
PIN
DIAMETER
GROOVE
DIAMETER
GROOVE WIDTH
(+/-0.010)
HOUSING
BORE
GROOVE
DIAMETER
1/2
SHOULDER WIDTH
1PW-PWR10M20-XX
1PW-PWR12M22-XX
5/8
3/4
0.6309
0.6339
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.6250
0.6230
0.7560
0.7590
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.7500
0.7480
0.0013
0.0103
HOUSING
BORE
GROOVE
DIAMETER
0.0013
0.0104
SHOULDER
DIAMETER
WITH SHOULDER
1.0010
1.0040
BEARING LENGTH
0.3125
GROOVE WIDTH
1.1260 HOUSING
1.1290 BEARING
0.5625
SHOULDER WIDTH
0.3125
BEARING
OD
BEARING
ID
PIN
1.2510DIAMETER
1.2540
0.3750
0.7500
HOUSING
BORE
GROOVE
DIAMETER
0.8125
7/8
0.8811
0.8841
1.5027
1.5047
1.500
1.502
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.3760
1.3790
0.3750
0.9375
1PW-PWR16M26-XX
1
1.0062
1.0092
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.0000
0.9980
0.0014
0.0105
1.5010
1.5040
0.3750
1.0625
1PW-PWR18M28-XX
1 1/8
1.1314
1.1344
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.6260
1.6290
0.3750
1.1875
1PW-PWR20M30-XX
1 1/4
1.2564
1.2594
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.2500
1.2480
0.0015
0.0106
1.7510
1.7540
0.3750
1.3750
1PW-PWR22M32-XX
1 3/8
1.3816
1.3856
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.8760
1.8790
0.3750
1.5000
1PW-PWR24M34-XX
1 1/2
1.5067
1.5107
2.1280
2.1300
2.125
2.127
0.0010
0.0049
1.5000
1.4980
0.0018
0.0117
2.0010
2.0040
0.3750
1.6250
1PW-PWR26M36-XX
1 5/8
1.6318
1.6358
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.1260
2.1290
0.3750
1.8125
1PW-PWR28M38-XX
1 3/4
1.7569
1.7609
2.3781
2.3801
2.375
2.377
0.0011
0.0050
1.7500
1.7480
0.0019
0.0118
2.2510
2.2540
0.3750
2.0000
1PW-PWR30M40-XX
1 7/8
1.8820
1.8860
2.5031
2.5051
2.500
2.502
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
2.3760
2.3790
0.3750
2.0000
1PW-PWR32M42-XX
2
2.0071
2.0111
2.6292
2.6312
2.625
2.628
0.0011
0.0061
2.0000
1.9980
0.0010
0.0119
2.5010
2.5040
0.3750
2.1875
1PW-PWR34M44-XX
2 1/8
2.1333
2.1373
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.1250
2.1230
0.0021
0.0131
2.6260
2.6290
0.3750
2.1875
1PW-PWR36M46-XX
2 1/4
2.2583
2.2623
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.2500
2.2480
0.0021
0.0130
2.7510
2.7540
0.3750
2.3750
1PW-PWR38M48-XX
2 3/8
2.3835
2.3875
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
2.8760
2.8790
0.3750
2.5625
1PW-PWR40M50-XX
2 1/2
2.5086
2.5126
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0010
3.0040
0.3750
2.7500
1PW-PWR44M54-XX
2 3/4
2.7588
2.7628
3.3795
3.3815
3.375
3.378
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2510
3.2540
0.3750
3.1250
1PW-PWR48M58-XX
3
3.0090
3.0130
3.6296
3.6316
3.625
3.628
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5040
0.3750
3.5000
1PW-PWR52M62-XX
3 1/4
3.2592
3.2632
3.8797
3.8817
3.875
3.878
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7510
3.7540
0.3750
3.9375
1PW-PWR56M66-XX
3 1/2
3.5095
3.5135
4.1298
4.1318
4.125
4.128
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0010
4.0040
0.3750
3.9375
1PW-PWR60M74-XX
3 3/4
3.7597
3.7637
4.6299
4.6319
4.625
4.628
0.0019
0.0069
3.7500
3.7470
0.0029
0.0149
4.5001
4.5031
0.3750
4.3750
1PW-PWR64M76-XX
4
4.0099
4.0139
4.7550
4.7570
4.750
4.753
0.0019
0.0069
4.0000
3.9970
0.0030
0.0149
4.6260
4.6290
0.3750
4.6875
1PW-PWR68M80-XX
4 1/4
4.2601
4.2641
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.2500
4.2470
0.0031
0.0150
4.8760
4.8790
0.3750
5.1250
1PW-PWR72M84-XX
4 1/2
4.5104
4.5144
5.2552
5.2572
5.250
5.253
0.0022
0.0072
4.5000
4.4970
0.0032
0.0153
5.1260
5.1290
0.3750
5.5625
1PW-PWR76M88-XX
4 3/4
4.7606
4.7646
5.5053
5.5073
5.500
5.503
0.0023
0.0072
4.7500
4.7470
0.0034
0.0153
5.3760
5.3790
0.3750
6.0000
1PW-PWR80M92-XX
5
5.0108
5.0148
5.7554
5.7574
5.750
5.753
0.0023
0.0073
5.0000
4.9970
0.0034
0.0155
5.6260
5.6290
0.3750
6.5000
800.918.9261
WEBSITE
polygoncomposites.com
DOUBLE SEA
WITH SHOULDE
BEARING LENGT
GROOVE WIDTH
HOUSING
BEARING
PIN
DIAMETER
SHOULDER
DIAMETER
1PW-PWR14M24-XX
PHONE
PIN
DIAMETER
MAXIMUM BEARING
LENGTH - 1 SEAL
(+/-0.010)
SINGLE SEAL
1PW-PWR08M18-XX
BEARING LENGT
HOUSING
BEARING
HOUSING
BORE
GROOVE
DIAMETER
Example:1PW-PWR16M26-12 (MRP Series Lined Bearing: 1.00" ID x 1.625" OD x 0.75" Long
(with a polyurethane press-in wiper seal)
BEARING PART
NUMBER
DOUBLE SEA
BEARING LENGTH
38
SINGLE SEAL
GROOVE
WIDTH
SINGLE SEAL
NOMINAL
ID
GROOVE
WIDTH
HOUSING
ID
OD
BORE
DIAMETER
PRESS
FIT
PIN
DIAMETER
RUNNING
CLEARANCE
0.5058
0.5088
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.5000
0.4980
0.0012
0.0102
BEARING
BEARING
OD
BEARING
ID
PIN
DIAMETER
GROOVE
DIAMETER
GROOVE WIDTH
(+/-0.010)
HOUSING
BORE
GROOVE
DIAMETER
1/2
SHOULDER WIDTH
1PW-PWR10M22-XX
1PW-PWR12M24-XX
5/8
3/4
0.6309
0.6339
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.6250
0.6230
0.7560
0.7590
1.5027
1.5047
1.500
1.502
0.0007
0.0047
0.7500
0.7480
0.0012
0.0103
HOUSING
BORE
GROOVE
DIAMETER
0.0013
0.0103
SHOULDER
DIAMETER
WITH SHOULDER
1.0010
1.0040
BEARING LENGTH
0.3125
GROOVE WIDTH
1.1260 HOUSING
1.1290 BEARING
1.0000
SHOULDER WIDTH
0.3125
BEARING
OD
BEARING
ID
PIN
1.2510DIAMETER
1.2540
0.3750
1.1875
HOUSING
BORE
GROOVE
DIAMETER
1.4375
7/8
0.8811
0.8841
1.6278
1.6298
1.625
1.627
0.0008
0.0048
0.8750
0.8730
0.0013
0.0104
1.3760
1.3790
0.3750
1.6250
1PW-PWR16M28-XX
1
1.0062
1.0092
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.0000
0.9980
0.0014
0.0104
1.5010
1.5040
0.3750
1.8125
1PW-PWR18M30-XX
1 1/8
1.1314
1.1344
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.1250
1.1230
0.0015
0.0106
1.6260
1.6290
0.3750
2.0625
1PW-PWR20M32-XX
1 1/4
1.2564
1.2594
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.2500
1.2480
0.0015
0.0105
1.7510
1.7540
0.3750
2.3125
1PW-PWR22M34-XX
1 3/8
1.3816
1.3856
2.1280
2.1300
2.125
2.127
0.0010
0.0049
1.3750
1.3730
0.0017
0.0116
1.8760
1.8790
0.3750
2.5625
1PW-PWR24M36-XX
1 1/2
1.5067
1.5107
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.5000
1.4980
0.0017
0.0117
2.0010
2.0040
0.3750
2.8125
1PW-PWR26M38-XX
1 5/8
1.6318
1.6358
2.3781
2.3801
2.375
2.377
0.0011
0.0050
1.6250
1.6230
0.0018
0.0117
2.1260
2.1290
0.3750
3.1250
1PW-PWR28M40-XX
1 3/4
1.7569
1.7609
2.5031
2.5051
2.500
2.502
0.0011
0.0051
1.7500
1.7480
0.0018
0.0118
2.2510
2.2540
0.3750
3.4375
1PW-PWR30M42-XX
1 7/8
1.8820
1.8860
2.6282
2.6302
2.625
2.628
0.0001
0.0051
1.8750
1.8730
0.0019
0.0129
2.3760
2.3790
0.3750
3.4375
1PW-PWR32M44-XX
2
2.0071
2.0111
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5010
2.5040
0.3750
3.7500
1PW-PWR34M46-XX
2 1/8
2.1333
2.1373
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.1250
2.1230
0.0021
0.0130
2.6260
2.6290
0.3750
3.7500
1PW-PWR36M48-XX
2 1/4
2.2583
2.2623
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7510
2.7540
0.3750
4.0000
1PW-PWR38M50-XX
2 3/8
2.3835
2.3875
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.3750
2.3730
0.0021
0.0131
2.8760
2.8790
0.3750
4.3125
1PW-PWR40M52-XX
2 1/2
2.5086
2.5126
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0010
3.0040
0.3750
4.6250
1PW-PWR44M56-XX
2 3/4
2.7588
2.7628
3.5045
3.5065
3.500
3.503
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2510
3.2540
0.3750
5.2500
1PW-PWR48M60-XX
3
3.0090
3.0130
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5040
0.3750
5.9375
1PW-PWR52M64-XX
3 1/4
3.2592
3.2632
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7510
3.7540
0.3750
6.6875
1PW-PWR56M68-XX
3 1/2
3.5095
3.5135
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0010
4.0040
0.3750
6.9375
1PW-PWR60M76-XX
3 3/4
3.7597
3.7637
4.7549
4.7569
4.750
4.753
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.5001
4.5031
0.3750
7.4375
1PW-PWR64M78-XX
4
4.0099
4.0139
4.8800
4.8820
4.875
4.878
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.6260
4.6290
0.3750
8.1250
1PW-PWR68M82-XX
4 1/4
4.2601
4.2641
5.1301
5.1321
5.125
5.128
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.8760
4.8790
0.3750
8.8750
1PW-PWR72M86-XX
4 1/2
4.5104
4.5144
5.3802
5.3822
5.375
5.378
0.0022
0.0072
4.5000
4.4970
0.0032
0.0152
5.1260
5.1290
0.3750
9.6250
1PW-PWR76M90-XX
4 3/4
4.7606
4.7646
5.6303
5.6323
5.625
5.628
0.0023
0.0073
4.7500
4.7470
0.0033
0.0153
5.3760
5.3790
0.3750
10.3750
1PW-PWR80M94-XX
5
5.0108
5.0148
5.8804
5.8824
5.875
5.878
0.0024
0.0074
5.0000
4.9970
0.0034
0.0154
5.6260
5.6290
0.3750
11.1875
800.918.9261
WEBSITE
polygoncomposites.com
DOUBLE SEA
WITH SHOULDE
BEARING LENGT
GROOVE WIDTH
HOUSING
BEARING
PIN
DIAMETER
SHOULDER
DIAMETER
1PW-PWR14M26-XX
PHONE
PIN
DIAMETER
MAXIMUM BEARING
LENGTH - 1 SEAL
(+/-0.010)
SINGLE SEAL
1PW-PWR08M20-XX
BEARING LENGT
HOUSING
BEARING
HOUSING
BORE
GROOVE
DIAMETER
Example:1PW-PWR32M44-40 (MRP Series Lined Bearing: 2.00" ID x 2.75" OD x 2.5" Long
(with a polyurethane press-in wiper seal)
BEARING PART
NUMBER
DOUBLE SEA
BEARING LENGTH
39
GROOVE
WIDTH
BEARING LENGTH
GROOVE
WIDTH
DOUBLE SEAL
HOUSING
BEARING
HOUSING
BORE
GROOVE
DIAMETER
PIN
DIAMETER
BEARING
BEARING
OD
BEARING
ID
Example: PWR16M26-20-2MC (MRP Series Lined Bearing: 1.00" ID x 1.625" OD x 1.25" Long
(with two polyurethane press-in wiper seals)
BEARING PART
NUMBER
NOMINAL
ID
ID
OD
1.1276
1.1296
1.125
1.127
SHOULDER WIDTH
1.2526
1.2546
2PW-PWR08M18-XX
1/2
0.5058
0.5088
2PW-PWR10M20-XX
5/8
0.6309
0.6339
2PW-PWR12M22-XX
3/4
0.7560
0.7590
BORE
DIAMETER
HOUSING
BORE
GROOVE
DIAMETER
1.3777
1.3797
BEARING LENGTH
HOUSING
SHOULDER
DIAMETER
PRESS
FIT
PIN
DIAMETER
SINGLE SEAL
WITH SHOULDER
0.0006
BEARING LENGTH
0.0046
GROOVE WIDTH
0.5000
0.4980
1.250
1.252
HOUSING
0.6250
0.6230
1.375
1.377
PIN
DIAMETER
0.0006
0.0046
BEARING
0.0007
0.0047
BEARING
OD
BEARING
ID
0.7500
0.7480
HOUSING
BORE
GROOVE
DIAMETER
RUNNING
CLEARANCE
BEARING
OD
PIN
DIAMETER
GROOVE
DIAMETER
BEARING
ID
GROOVE WIDTH
(+/-0.010)
DOUBLE SEAL
WITH SHOULDERS
0.0012
1.0010
BEARING LENGTH
0.0103
1.0040
GROOVE WIDTH
SHOULDER WIDTH
HOUSING
MAXIMUM BEARING
LENGTH - 1 SEAL
(+/-0.010)
0.3125
0.7500
0.3125
0.9375
0.0013
0.0103
1.1260 BEARING
1.1290
0.0013
0.0104
SHOULDER
1.2510DIAMETER
1.2540
0.3750
1.0000
HOUSING
BORE
GROOVE
DIAMETER
DIAMETER
PIN
BEARING
OD
BEARING
ID
2PW-PWR14M24-XX
7/8
0.8811
0.8841
1.5027
1.5047
1.500
1.502
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.3760
1.3790
0.3750
1.1250
2PW-PWR16M26-XX
1
1.0062
1.0092
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.0000
0.9980
0.0014
0.0105
1.5010
1.5040
0.3750
1.2500
2PW-PWR18M28-XX
1 1/8
1.1314
1.1344
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.6260
1.6290
0.3750
1.3750
2PW-PWR20M30-XX
1 1/4
1.2564
1.2594
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.2500
1.2480
0.0015
0.0106
1.7510
1.7540
0.3750
1.5625
2PW-PWR22M32-XX
1 3/8
1.3816
1.3856
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.8760
1.8790
0.3750
1.6875
2PW-PWR24M34-XX
1 1/2
1.5067
1.5107
2.1280
2.1300
2.125
2.127
0.0010
0.0049
1.5000
1.4980
0.0018
0.0117
2.0010
2.0040
0.3750
1.8125
2PW-PWR26M36-XX
1 5/8
1.6318
1.6358
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.1260
2.1290
0.3750
2.0000
2PW-PWR28M38-XX
1 3/4
1.7569
1.7609
2.3781
2.3801
2.375
2.377
0.0011
0.0050
1.7500
1.7480
0.0019
0.0118
2.2510
2.2540
0.3750
2.1875
2PW-PWR30M40-XX
1 7/8
1.8820
1.8860
2.5031
2.5051
2.500
2.502
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
2.3760
2.3790
0.3750
2.1875
2PW-PWR32M42-XX
2
2.0071
2.0111
2.6292
2.6312
2.625
2.628
0.0011
0.0061
2.0000
1.9980
0.0010
0.0119
2.5010
2.5040
0.3750
2.3750
2PW-PWR34M44-XX
2 1/8
2.1333
2.1373
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.1250
2.1230
0.0021
0.0131
2.6260
2.6290
0.3750
2.3750
2PW-PWR36M46-XX
2 1/4
2.2583
2.2623
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.2500
2.2480
0.0021
0.0130
2.7510
2.7540
0.3750
2.5625
2PW-PWR38M48-XX
2 3/8
2.3835
2.3875
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
2.8760
2.8790
0.3750
2.7500
2PW-PWR40M50-XX
2 1/2
2.5086
2.5126
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0010
3.0040
0.3750
2.9375
2PW-PWR44M54-XX
2 3/4
2.7588
2.7628
3.3795
3.3815
3.375
3.378
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2510
3.2540
0.3750
3.3125
2PW-PWR48M58-XX
3
3.0090
3.0130
3.6296
3.6316
3.625
3.628
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5040
0.3750
3.6875
2PW-PWR52M62-XX
3 1/4
3.2592
3.2632
3.8797
3.8817
3.875
3.878
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7510
3.7540
0.3750
4.1250
2PW-PWR56M66-XX
3 1/2
3.5095
3.5135
4.1298
4.1318
4.125
4.128
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0010
4.0040
0.3750
4.1250
2PW-PWR60M74-XX
3 3/4
3.7597
3.7637
4.6299
4.6319
4.625
4.628
0.0019
0.0069
3.7500
3.7470
0.0029
0.0149
4.5001
4.5031
0.3750
4.5625
2PW-PWR64M76-XX
4
4.0099
4.0139
4.7550
4.7570
4.750
4.753
0.0019
0.0069
4.0000
3.9970
0.0030
0.0149
4.6260
4.6290
0.3750
4.8750
2PW-PWR68M80-XX
4 1/4
4.2601
4.2641
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.2500
4.2470
0.0031
0.0150
4.8760
4.8790
0.3750
5.3125
2PW-PWR72M84-XX
4 1/2
4.5104
4.5144
5.2552
5.2572
5.250
5.253
0.0022
0.0072
4.5000
4.4970
0.0032
0.0153
5.1260
5.1290
0.3750
5.7500
2PW-PWR76M88-XX
4 3/4
4.7606
4.7646
5.5053
5.5073
5.500
5.503
0.0023
0.0072
4.7500
4.7470
0.0034
0.0153
5.3760
5.3790
0.3750
6.1875
2PW-PWR80M92-XX
5
5.0108
5.0148
5.7554
5.7574
5.750
5.753
0.0023
0.0073
5.0000
4.9970
0.0034
0.0155
5.6260
5.6290
0.3750
6.6875
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
40
GROOVE
WIDTH
BEARING LENGTH
GROOVE
WIDTH
DOUBLE SEAL
HOUSING
BEARING
HOUSING
BORE
GROOVE
DIAMETER
PIN
DIAMETER
BEARING
BEARING
OD
BEARING
ID
Example: PWR20M32-24-2MC (MRP Series Lined Bearing: 1.25" ID x 2.00" OD x 1.50" Long
(with two polyurethane press-in wiper seals)
BEARING PART
NUMBER
NOMINAL
ID
ID
OD
1.2526
1.2546
1.250
1.252
SHOULDER WIDTH
1.3777
1.3797
2PW-PWR08M20-XX
1/2
0.5058
0.5088
2PW-PWR10M22-XX
5/8
0.6309
0.6339
2PW-PWR12M24-XX
3/4
0.7560
0.7590
BORE
DIAMETER
HOUSING
BORE
GROOVE
DIAMETER
1.5027
1.5047
BEARING LENGTH
HOUSING
SHOULDER
DIAMETER
PRESS
FIT
PIN
DIAMETER
SINGLE SEAL
WITH SHOULDER
0.0006
BEARING LENGTH
0.0046
GROOVE WIDTH
0.5000
0.4980
1.375
1.377
HOUSING
0.6250
0.6230
1.500
1.502
PIN
DIAMETER
0.0007
0.0047
BEARING
0.0007
0.0047
BEARING
OD
BEARING
ID
0.7500
0.7480
HOUSING
BORE
GROOVE
DIAMETER
RUNNING
CLEARANCE
BEARING
OD
PIN
DIAMETER
GROOVE
DIAMETER
BEARING
ID
GROOVE WIDTH
(+/-0.010)
DOUBLE SEAL
WITH SHOULDERS
0.0012
1.0010
BEARING LENGTH
0.0102
1.0040
GROOVE WIDTH
SHOULDER WIDTH
HOUSING
MAXIMUM BEARING
LENGTH - 1 SEAL
(+/-0.010)
0.3125
1.1875
0.3125
1.3750
0.0012
0.0103
1.1260 BEARING
1.1290
0.0013
0.0103
SHOULDER
1.2510DIAMETER
1.2540
0.3750
1.6250
HOUSING
BORE
GROOVE
DIAMETER
DIAMETER
PIN
BEARING
OD
BEARING
ID
2PW-PWR14M26-XX
7/8
0.8811
0.8841
1.6278
1.6298
1.625
1.627
0.0008
0.0048
0.8750
0.8730
0.0013
0.0104
1.3760
1.3790
0.3750
1.8125
2PW-PWR16M28-XX
1
1.0062
1.0092
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.0000
0.9980
0.0014
0.0104
1.5010
1.5040
0.3750
2.0000
2PW-PWR18M30-XX
1 1/8
1.1314
1.1344
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.1250
1.1230
0.0015
0.0106
1.6260
1.6290
0.3750
2.2500
2PW-PWR20M32-XX
1 1/4
1.2564
1.2594
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.2500
1.2480
0.0015
0.0105
1.7510
1.7540
0.3750
2.5000
2PW-PWR22M34-XX
1 3/8
1.3816
1.3856
2.1280
2.1300
2.125
2.127
0.0010
0.0049
1.3750
1.3730
0.0017
0.0116
1.8760
1.8790
0.3750
2.7500
2PW-PWR24M36-XX
1 1/2
1.5067
1.5107
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.5000
1.4980
0.0017
0.0117
2.0010
2.0040
0.3750
3.0000
2PW-PWR26M38-XX
1 5/8
1.6318
1.6358
2.3781
2.3801
2.375
2.377
0.0011
0.0050
1.6250
1.6230
0.0018
0.0117
2.1260
2.1290
0.3750
3.3125
2PW-PWR28M40-XX
1 3/4
1.7569
1.7609
2.5031
2.5051
2.500
2.502
0.0011
0.0051
1.7500
1.7480
0.0018
0.0118
2.2510
2.2540
0.3750
3.6250
2PW-PWR30M42-XX
1 7/8
1.8820
1.8860
2.6282
2.6302
2.625
2.628
0.0001
0.0051
1.8750
1.8730
0.0019
0.0129
2.3760
2.3790
0.3750
3.6250
2PW-PWR32M44-XX
2
2.0071
2.0111
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5010
2.5040
0.3750
3.9375
2PW-PWR34M46-XX
2 1/8
2.1333
2.1373
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.1250
2.1230
0.0021
0.0130
2.6260
2.6290
0.3750
3.9375
2PW-PWR36M48-XX
2 1/4
2.2583
2.2623
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7510
2.7540
0.3750
4.1875
2PW-PWR38M50-XX
2 3/8
2.3835
2.3875
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.3750
2.3730
0.0021
0.0131
2.8760
2.8790
0.3750
4.5000
2PW-PWR40M52-XX
2 1/2
2.5086
2.5126
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0010
3.0040
0.3750
4.8125
2PW-PWR44M56-XX
2 3/4
2.7588
2.7628
3.5045
3.5065
3.500
3.503
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2510
3.2540
0.3750
5.4375
2PW-PWR48M60-XX
3
3.0090
3.0130
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5040
0.3750
6.1250
2PW-PWR52M64-XX
3 1/4
3.2592
3.2632
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7510
3.7540
0.3750
6.8750
2PW-PWR56M68-XX
3 1/2
3.5095
3.5135
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0010
4.0040
0.3750
7.1250
2PW-PWR60M76-XX
3 3/4
3.7597
3.7637
4.7549
4.7569
4.750
4.753
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.5001
4.5031
0.3750
7.6250
2PW-PWR64M78-XX
4
4.0099
4.0139
4.8800
4.8820
4.875
4.878
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.6260
4.6290
0.3750
8.3125
2PW-PWR68M82-XX
4 1/4
4.2601
4.2641
5.1301
5.1321
5.125
5.128
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.8760
4.8790
0.3750
9.0625
2PW-PWR72M86-XX
4 1/2
4.5104
4.5144
5.3802
5.3822
5.375
5.378
0.0022
0.0072
4.5000
4.4970
0.0032
0.0152
5.1260
5.1290
0.3750
9.8125
2PW-PWR76M90-XX
4 3/4
4.7606
4.7646
5.6303
5.6323
5.625
5.628
0.0023
0.0073
4.7500
4.7470
0.0033
0.0153
5.3760
5.3790
0.3750
10.5625
2PW-PWR80M94-XX
5
5.0108
5.0148
5.8804
5.8824
5.875
5.878
0.0024
0.0074
5.0000
4.9970
0.0034
0.0154
5.6260
5.6290
0.3750
11.3750
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
41
WITH SHOULDER
SINGLE SEAL
SHOULDER WIDTH
ID
OD
BORE
DIAMETER
PRESS
FIT
PIN
DIAMETER
SHOULDER
DIAMETER
PIN
RUNNING GROOVE
DIAMETER CLEARANCE DIAMETER
BEAR
BEARING
OD
BEARING
ID
HOUSING
BORE
GROOVE
DIAMETER
GROOVE SHOULDER SHOULDER
MAXIMUM
WIDTH
DIAMETER
WIDTH
BEARING LENGTH
(+/-0.010) (+/-0.010) (+/-0.010) 1 SEAL (+/-0.010)
1/2
0.5058
0.5088
0.8775
0.8795
0.875
0.877
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
0.7495
0.7545
0.1240
0.1280
0.6600
0.1000
0.5625
1SW-PWR10M16-XX
5/8
0.6309
0.6339
1.0026
1.0046
1.000
1.002
0.0006
0.0046
0.6250
0.6230
0.0013
0.0103
0.8746
0.8796
0.1240
0.1280
0.7850
0.1000
0.6875
1SW-PWR12M20-XX
3/4
0.7560
0.7590
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
1.1246
1.1296
0.1870
0.1910
0.9950
0.1250
0.8125
1SW-PWR14M22-XX
7/8
0.8811
0.8841
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.2497
1.2547
0.1870
0.1910
1.1200
0.1250
0.9375
1SW-PWR16M24-XX
1
1.0062
1.0092
1.5027
1.5047
1.500
1.502
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
1.3747
1.3797
0.1870
0.1910
1.2450
0.1250
1.1250
1SW-PWR18M26-XX
1 1/8
1.1314
1.1344
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.4998
1.5048
0.1870
0.1910
1.3700
0.1250
1.2500
1SW-PWR20M28-XX
1 1/4
1.2564
1.2594
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
1.6248
1.6298
0.1870
0.1910
1.4950
0.1250
1.4375
1SW-PWR22M30-XX
1 3/8
1.3816
1.3856
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.7499
1.7549
0.1870
0.1910
1.6200
0.1250
1.5625
1SW-PWR24M32-XX
1 1/2
1.5067
1.5107
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
1.8749
1.8799
0.1870
0.1910
1.7450
0.1250
1.8125
1SW-PWR26M34-XX
1 5/8
1.6318
1.6358
2.1280
2.1300
2.125
2.127
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.0000
2.0050
0.1870
0.1910
1.8700
0.1250
2.0000
1SW-PWR28M36-XX
1 3/4
1.7569
1.7609
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
2.1250
2.1300
0.1870
0.1910
1.9950
0.1250
2.0000
1SW-PWR30M38-XX
1 7/8
1.8820
1.8860
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
2.2501
2.2551
0.1870
0.1910
2.1200
0.1250
2.1875
1SW-PWR32M42-XX
2
2.0071
2.0111
2.6292
2.6312
2.625
2.628
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5001
2.5051
0.2490
0.2530
2.3270
0.1875
2.1875
1SW-PWR34M44-XX
2 1/8
2.1333
2.1373
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.1250
2.1230
0.0021
0.0131
2.6257
2.6304
0.2490
0.2530
2.4520
0.1875
2.3750
1SW-PWR36M46-XX
2 1/4
2.2583
2.2623
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7507
2.7555
0.2490
0.2530
2.5770
0.1875
2.3750
1SW-PWR38M48-XX
2 3/8
2.3835
2.3875
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
2.8758
2.8805
0.2490
0.2530
2.7020
0.1875
2.5625
1SW-PWR40M50-XX
2 1/2
2.5086
2.5126
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0008
3.0056
0.2490
0.2530
2.8270
0.1875
2.6875
1SW-PWR44M54-XX
2 3/4
2.7588
2.7628
3.3795
3.3815
3.375
3.378
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2509
3.2557
0.2490
0.2530
3.0770
0.1875
3.0625
1SW-PWR48M58-XX
3
3.0090
3.0130
3.6296
3.6316
3.625
3.628
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5058
0.2490
0.2530
3.3270
0.1875
3.5000
1SW-PWR52M62-XX
3 1/4
3.2592
3.2632
3.8797
3.8817
3.875
3.878
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7511
3.7559
0.2490
0.2530
3.5770
0.1875
3.8750
1SW-PWR56M66-XX
3 1/2
3.5095
3.5135
4.1298
4.1318
4.125
4.128
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0012
4.0060
0.2490
0.2530
3.8270
0.1875
4.3125
1SW-PWR60M70-XX
3 3/4
3.7597
3.7637
4.3799
4.3819
4.375
4.378
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.2513
4.2561
0.2490
0.2530
4.0770
0.1875
4.7500
1SW-PWR64M74-XX
4
4.0099
4.0139
4.6300
4.6320
4.625
4.628
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.5014
4.5062
0.2490
0.2530
4.3270
0.1875
5.0000
1SW-PWR68M78-XX
4 1/4
4.2601
4.2641
4.8801
4.8821
4.875
4.878
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.7515
4.7563
0.2490
0.2530
4.5770
0.1875
5.2500
1SW-PWR72M86-XX
4 1/2
4.5104
4.5144
5.3802
5.3822
5.375
5.378
0.0022
0.0072
4.5000
4.4970
0.0032
0.0152
5.2516
5.2564
0.3740
0.3780
4.9930
0.2500
5.3750
1SW-PWR76M90-XX
4 3/4
4.7606
4.7646
5.6303
5.6323
5.625
5.628
0.0023
0.0073
4.7500
4.7470
0.0033
0.0153
5.5017
5.5065
0.3740
0.3780
5.2430
0.2500
5.7500
1SW-PWR80M94-XX
5
5.0108
5.0148
5.8804
5.8824
5.875
5.878
0.0024
0.0074
5.0000
4.9970
0.0034
0.0154
5.7518
5.7566
0.3740
0.3780
5.4930
0.2500
5.8125
800.918.9261
WEBSITE
polygoncomposites.com
PIN
DIAME
SHOULDER
DIAMETER
1SW-PWR08M14-XX
PHONE
BEARING
GROOVE W
HOUS
BEARING
Example:1SW-PWR16M24-12 (MRP Series Lined Bearing: 1.00" ID x 1.50" OD x 0.75" Long
(with a polyurethane snap-in wiper seal)
NOMINAL
ID
SHOULDER WIDTH
HOUSING
HOUSING
BORE
GROOVE
DIAMETER
WITH SHOULDER
BEARING PART
NUMBER
WITH SHO
BEARING LENGTH
GROOVE WIDTH
42
WITH SHOULDER
SINGLE SEAL
SHOULDER WIDTH
ID
OD
BORE
DIAMETER
PRESS
FIT
PIN
DIAMETER
SHOULDER
DIAMETER
PIN
RUNNING GROOVE
DIAMETER CLEARANCE DIAMETER
BEAR
BEARING
OD
BEARING
ID
HOUSING
BORE
GROOVE
DIAMETER
GROOVE SHOULDER SHOULDER
MAXIMUM
WIDTH
DIAMETER
WIDTH
BEARING LENGTH
(+/-0.010) (+/-0.010) (+/-0.010) 1 SEAL (+/-0.010)
1/2
0.5058
0.5088
1.0026
1.0046
1.000
1.002
0.0006
0.0046
0.5000
0.4980
0.0012
0.0102
0.7495
0.7545
0.1240
0.1280
0.6600
0.1000
0.9375
1SW-PWR10M18-XX
5/8
0.6309
0.6339
1.1276
1.1296
1.125
1.127
0.0006
0.0046
0.6250
0.6230
0.0013
0.0103
0.8746
0.8796
0.1240
0.1280
0.7850
0.1000
1.1250
1SW-PWR12M22-XX
3/4
0.7560
0.7590
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.7500
0.7480
0.0013
0.0103
1.1246
1.1296
0.1870
0.1910
0.9950
0.1250
1.3750
1SW-PWR14M24-XX
7/8
0.8811
0.8841
1.5027
1.5047
1.500
1.502
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.2497
1.2547
0.1870
0.1910
1.1200
0.1250
1.6250
1SW-PWR16M26-XX
1
1.0062
1.0092
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.0000
0.9980
0.0014
0.0104
1.3747
1.3797
0.1870
0.1910
1.2450
0.1250
1.8750
1SW-PWR18M28-XX
1 1/8
1.1314
1.1344
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.4998
1.5048
0.1870
0.1910
1.3700
0.1250
2.1250
1SW-PWR20M30-XX
1 1/4
1.2564
1.2594
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.2500
1.2480
0.0015
0.0105
1.6248
1.6298
0.1870
0.1910
1.4950
0.1250
2.3750
1SW-PWR22M32-XX
1 3/8
1.3816
1.3856
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.7499
1.7549
0.1870
0.1910
1.6200
0.1250
2.6875
1SW-PWR24M34-XX
1 1/2
1.5067
1.5107
2.1280
2.1300
2.125
2.127
0.0010
0.0050
1.5000
1.4980
0.0017
0.0117
1.8749
1.8799
0.1870
0.1910
1.7450
0.1250
3.0000
1SW-PWR26M36-XX
1 5/8
1.6318
1.6358
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.0000
2.0050
0.1870
0.1910
1.8700
0.1250
3.3125
1SW-PWR28M38-XX
1 3/4
1.7569
1.7609
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.7500
1.7480
0.0018
0.0118
2.1250
2.1300
0.1870
0.1910
1.9950
0.1250
3.4375
1SW-PWR30M40-XX
1 7/8
1.8820
1.8860
2.5041
2.5061
2.500
2.502
0.0021
0.0061
1.8750
1.8730
0.0009
0.0109
2.2501
2.2551
0.1870
0.1910
2.1200
0.1250
3.4375
1SW-PWR32M44-XX
2
2.0071
2.0111
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5001
2.5051
0.2490
0.2530
2.3270
0.1875
3.6250
1SW-PWR34M46-XX
2 1/8
2.1333
2.1373
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.1250
2.1230
0.0020
0.0130
2.6257
2.6304
0.2490
0.2530
2.4520
0.1875
3.6875
1SW-PWR36M48-XX
2 1/4
2.2583
2.2623
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7507
2.7555
0.2490
0.2530
2.5770
0.1875
4.0000
1SW-PWR38M50-XX
2 3/8
2.3835
2.3875
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.3750
2.3730
0.0021
0.0131
2.8758
2.8805
0.2490
0.2530
2.7020
0.1875
4.3125
1SW-PWR40M52-XX
2 1/2
2.5086
2.5126
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0008
3.0056
0.2490
0.2530
2.8270
0.1875
4.6250
1SW-PWR44M56-XX
2 3/4
2.7588
2.7628
3.5045
3.5065
3.500
3.503
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2509
3.2557
0.2490
0.2530
3.0770
0.1875
5.2500
1SW-PWR48M60-XX
3
3.0090
3.0130
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5058
0.2490
0.2530
3.3270
0.1875
5.9375
1SW-PWR52M64-XX
3 1/4
3.2592
3.2632
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7511
3.7559
0.2490
0.2530
3.5770
0.1875
6.6875
1SW-PWR56M68-XX
3 1/2
3.5095
3.5135
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0012
4.0060
0.2490
0.2530
3.8270
0.1875
7.3750
1SW-PWR60M72-XX
3 3/4
3.7597
3.7637
4.5049
4.5069
4.500
4.503
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.2513
4.2561
0.2490
0.2530
4.0770
0.1875
8.1875
1SW-PWR64M76-XX
4
4.0099
4.0139
4.7550
4.7570
4.750
4.753
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.5014
4.5062
0.2490
0.2530
4.3270
0.1875
8.7500
1SW-PWR68M80-XX
4 1/4
4.2601
4.2641
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.7515
4.7563
0.2490
0.2530
4.5770
0.1875
8.9375
1SW-PWR72M88-XX
4 1/2
4.5104
4.5144
5.5053
5.5073
5.500
5.503
0.0023
0.0073
4.5000
4.4970
0.0031
0.0151
5.2516
5.2564
0.3740
0.3780
4.9930
0.2500
9.4375
1SW-PWR76M92-XX
4 3/4
4.7606
4.7646
5.7554
5.7574
5.750
5.753
0.0024
0.0074
4.7500
4.7470
0.0032
0.0152
5.5017
5.5065
0.3740
0.3780
5.2430
0.2500
9.7500
1SW-PWR80M96-XX
5
5.0108
5.0148
6.0055
6.0075
6.000
6.003
0.0025
0.0075
5.0000
4.9970
0.0033
0.0153
5.7518
5.7566
0.3740
0.3780
5.4930
0.2500
10.1250
800.918.9261
WEBSITE
polygoncomposites.com
PIN
DIAME
SHOULDER
DIAMETER
1SW-PWR08M16-XX
PHONE
BEARING
GROOVE W
HOUS
BEARING
Example:1SW-PWR16M26-24 (MRP Series Lined Bearing: 1.00" ID x 1.625" OD x 1.50" Long
(with a polyurethane snap-in wiper seal)
NOMINAL
ID
SHOULDER WIDTH
HOUSING
HOUSING
BORE
GROOVE
DIAMETER
WITH SHOULDER
BEARING PART
NUMBER
WITH SHO
BEARING LENGTH
GROOVE WIDTH
43
WITH SHOULDER
DOUBLE SEAL
SHOULDER WIDTH
PIN
DIAMETER
NOMINAL
ID
ID
OD
BORE
DIAMETER
PRESS
FIT
BEARING LENGTH
GROOVE WIDTH
HOUSING
BEARING
SHOULDER
Example:2SW-PWR20M28-24 (MRP Series Lined Bearing: 1.25" ID x 1.75"
OD x 1.5" Long
DIAMETER
(with two polyurethane snap-in wiper seals)
BEARING PART
NUMBER
SHOULDER WIDTH
HOUSING
HOUSING
BORE
GROOVE
DIAMETER
WITH SHOULDERS
WITH SHOULDERS
BEARING LENGTH
GROOVE WIDTH
BEARING
BEARING
OD
BEARING
ID
HOUSING
BORE
GROOVE
DIAMETER
PIN
DIAMETER
SHOULDER
DIAMETER
PIN
RUNNING GROOVE
DIAMETER CLEARANCE DIAMETER
BEARING
OD
BEARING
ID
GROOVE SHOULDER SHOULDER
MAXIMUM
WIDTH
DIAMETER
WIDTH
BEARING LENGTH
(+/-0.010) (+/-0.010) (+/-0.010) 1 SEAL (+/-0.010)
2SW-PWR08M14-XX
1/2
0.5058
0.5088
0.8775
0.8795
0.875
0.877
0.0005
0.0045
0.5000
0.4980
0.0013
0.0103
0.7495
0.7545
0.1240
0.1280
0.6600
0.1000
0.6875
2SW-PWR10M16-XX
5/8
0.6309
0.6339
1.0026
1.0046
1.000
1.002
0.0006
0.0046
0.6250
0.6230
0.0013
0.0103
0.8746
0.8796
0.1240
0.1280
0.7850
0.1000
0.8125
2SW-PWR12M20-XX
3/4
0.7560
0.7590
1.2526
1.2546
1.250
1.252
0.0006
0.0046
0.7500
0.7480
0.0014
0.0104
1.1246
1.1296
0.1870
0.1910
0.9950
0.1250
1.0000
2SW-PWR14M22-XX
7/8
0.8811
0.8841
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.2497
1.2547
0.1870
0.1910
1.1200
0.1250
1.1250
2SW-PWR16M24-XX
1
1.0062
1.0092
1.5027
1.5047
1.500
1.502
0.0007
0.0047
1.0000
0.9980
0.0015
0.0105
1.3747
1.3797
0.1870
0.1910
1.2450
0.1250
1.2500
2SW-PWR18M26-XX
1 1/8
1.1314
1.1344
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.4998
1.5048
0.1870
0.1910
1.3700
0.1250
1.4375
2SW-PWR20M28-XX
1 1/4
1.2564
1.2594
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.2500
1.2480
0.0016
0.0106
1.6248
1.6298
0.1870
0.1910
1.4950
0.1250
1.5625
2SW-PWR22M30-XX
1 3/8
1.3816
1.3856
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.7499
1.7549
0.1870
0.1910
1.6200
0.1250
1.7500
2SW-PWR24M32-XX
1 1/2
1.5067
1.5107
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.5000
1.4980
0.0018
0.0118
1.8749
1.8799
0.1870
0.1910
1.7450
0.1250
1.9375
2SW-PWR26M34-XX
1 5/8
1.6318
1.6358
2.1280
2.1300
2.125
2.127
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.0000
2.0050
0.1870
0.1910
1.8700
0.1250
2.1250
2SW-PWR28M36-XX
1 3/4
1.7569
1.7609
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.7500
1.7480
0.0019
0.0119
2.1250
2.1300
0.1870
0.1910
1.9950
0.1250
2.2500
2SW-PWR30M38-XX
1 7/8
1.8820
1.8860
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.8750
1.8730
0.0019
0.0119
2.2501
2.2551
0.1870
0.1910
2.1200
0.1250
2.3750
2SW-PWR32M42-XX
2
2.0071
2.0111
2.6292
2.6312
2.625
2.628
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5001
2.5051
0.2490
0.2530
2.3270
0.1875
2.4375
2SW-PWR34M44-XX
2 1/8
2.1333
2.1373
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.1250
2.1230
0.0021
0.0131
2.6257
2.6304
0.2490
0.2530
2.4520
0.1875
2.5625
2SW-PWR36M46-XX
2 1/4
2.2583
2.2623
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7507
2.7555
0.2490
0.2530
2.5770
0.1875
2.5625
2SW-PWR38M48-XX
2 3/8
2.3835
2.3875
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.3750
2.3730
0.0022
0.0132
2.8758
2.8805
0.2490
0.2530
2.7020
0.1875
2.7500
2SW-PWR40M50-XX
2 1/2
2.5086
2.5126
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0008
3.0056
0.2490
0.2530
2.8270
0.1875
2.9375
2SW-PWR44M54-XX
2 3/4
2.7588
2.7628
3.3795
3.3815
3.375
3.378
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2509
3.2557
0.2490
0.2530
3.0770
0.1875
3.3125
2SW-PWR48M58-XX
3
3.0090
3.0130
3.6296
3.6316
3.625
3.628
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5058
0.2490
0.2530
3.3270
0.1875
3.6875
2SW-PWR52M62-XX
3 1/4
3.2592
3.2632
3.8797
3.8817
3.875
3.878
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7511
3.7559
0.2490
0.2530
3.5770
0.1875
4.1250
2SW-PWR56M66-XX
3 1/2
3.5095
3.5135
4.1298
4.1318
4.125
4.128
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0012
4.0060
0.2490
0.2530
3.8270
0.1875
4.5625
2SW-PWR60M70-XX
3 3/4
3.7597
3.7637
4.3799
4.3819
4.375
4.378
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.2513
4.2561
0.2490
0.2530
4.0770
0.1875
5.0000
2SW-PWR64M74-XX
4
4.0099
4.0139
4.6300
4.6320
4.625
4.628
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.5014
4.5062
0.2490
0.2530
4.3270
0.1875
5.3125
2SW-PWR68M78-XX
4 1/4
4.2601
4.2641
4.8801
4.8821
4.875
4.878
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.7515
4.7563
0.2490
0.2530
4.5770
0.1875
5.4375
2SW-PWR72M86-XX
4 1/2
4.5104
4.5144
5.3802
5.3822
5.375
5.378
0.0022
0.0072
4.5000
4.4970
0.0032
0.0152
5.2516
5.2564
0.3740
0.3780
4.9930
0.2500
5.6875
2SW-PWR76M90-XX
4 3/4
4.7606
4.7646
5.6303
5.6323
5.625
5.628
0.0023
0.0073
4.7500
4.7470
0.0033
0.0153
5.5017
5.5065
0.3740
0.3780
5.2430
0.2500
5.9375
2SW-PWR80M94-XX
5
5.0108
5.0148
5.8804
5.8824
5.875
5.878
0.0024
0.0074
5.0000
4.9970
0.0034
0.0154
5.7518
5.7566
0.3740
0.3780
5.4930
0.2500
6.1250
PHONE
800.918.9261
WEBSITE
polygoncomposites.com
44
WITH SHOULDER
DOUBLE SEAL
SHOULDER WIDTH
PIN
DIAMETER
NOMINAL
ID
ID
OD
BORE
DIAMETER
PRESS
FIT
BEARING LENGTH
GROOVE WIDTH
HOUSING
BEARING
SHOULDER
Example:2SW-PWR16M26-20 (MRP Series Lined Bearing: 1.00" ID x 1.625"
DIAMETEROD x 1.25" Long
(with two polyurethane snap-in wiper seals)
BEARING PART
NUMBER
SHOULDER WIDTH
HOUSING
HOUSING
BORE
GROOVE
DIAMETER
WITH SHOULDERS
WITH SHOULDERS
BEARING LENGTH
GROOVE WIDTH
BEARING
BEARING
OD
BEARING
ID
HOUSING
BORE
GROOVE
DIAMETER
PIN
DIAMETER
SHOULDER
DIAMETER
PIN
RUNNING GROOVE
DIAMETER CLEARANCE DIAMETER
BEARING
OD
BEARING
ID
GROOVE SHOULDER SHOULDER
MAXIMUM
WIDTH
DIAMETER
WIDTH
BEARING LENGTH
(+/-0.010) (+/-0.010) (+/-0.010) 1 SEAL (+/-0.010)
2SW-PWR08M16-XX
1/2
0.5058
0.5088
1.0026
1.0046
1.000
1.002
0.0006
0.0046
0.5000
0.4980
0.0012
0.0102
0.7495
0.7545
0.1240
0.1280
0.6600
0.1000
1.0000
2SW-PWR10M18-XX
5/8
0.6309
0.6339
1.1276
1.1296
1.125
1.127
0.0006
0.0046
0.6250
0.6230
0.0013
0.0103
0.8746
0.8796
0.1240
0.1280
0.7850
0.1000
1.2500
2SW-PWR12M22-XX
3/4
0.7560
0.7590
1.3777
1.3797
1.375
1.377
0.0007
0.0047
0.7500
0.7480
0.0013
0.0103
1.1246
1.1296
0.1870
0.1910
0.9950
0.1250
1.5625
2SW-PWR14M24-XX
7/8
0.8811
0.8841
1.5027
1.5047
1.500
1.502
0.0007
0.0047
0.8750
0.8730
0.0014
0.0104
1.2497
1.2547
0.1870
0.1910
1.1200
0.1250
1.7500
2SW-PWR16M26-XX
1
1.0062
1.0092
1.6278
1.6298
1.625
1.627
0.0008
0.0048
1.0000
0.9980
0.0014
0.0104
1.3747
1.3797
0.1870
0.1910
1.2450
0.1250
2.0000
2SW-PWR18M28-XX
1 1/8
1.1314
1.1344
1.7528
1.7548
1.750
1.752
0.0008
0.0048
1.1250
1.1230
0.0016
0.0106
1.4998
1.5048
0.1870
0.1910
1.3700
0.1250
2.3125
2SW-PWR20M30-XX
1 1/4
1.2564
1.2594
1.8779
1.8799
1.875
1.877
0.0009
0.0049
1.2500
1.2480
0.0015
0.0105
1.6248
1.6298
0.1870
0.1910
1.4950
0.1250
2.5625
2SW-PWR22M32-XX
1 3/8
1.3816
1.3856
2.0029
2.0049
2.000
2.002
0.0009
0.0049
1.3750
1.3730
0.0017
0.0117
1.7499
1.7549
0.1870
0.1910
1.6200
0.1250
2.8750
2SW-PWR24M34-XX
1 1/2
1.5067
1.5107
2.1280
2.1300
2.125
2.127
0.0010
0.0050
1.5000
1.4980
0.0017
0.0117
1.8749
1.8799
0.1870
0.1910
1.7450
0.1250
3.1250
2SW-PWR26M36-XX
1 5/8
1.6318
1.6358
2.2530
2.2550
2.250
2.252
0.0010
0.0050
1.6250
1.6230
0.0018
0.0118
2.0000
2.0050
0.1870
0.1910
1.8700
0.1250
3.5000
2SW-PWR28M38-XX
1 3/4
1.7569
1.7609
2.3781
2.3801
2.375
2.377
0.0011
0.0051
1.7500
1.7480
0.0018
0.0118
2.1250
2.1300
0.1870
0.1910
1.9950
0.1250
3.5625
2SW-PWR30M40-XX
1 7/8
1.8820
1.8860
2.5041
2.5061
2.500
2.502
0.0021
0.0061
1.8750
1.8730
0.0009
0.0109
2.2501
2.2551
0.1870
0.1910
2.1200
0.1250
3.6875
2SW-PWR32M44-XX
2
2.0071
2.0111
2.7542
2.7562
2.750
2.753
0.0012
0.0062
2.0000
1.9980
0.0009
0.0119
2.5001
2.5051
0.2490
0.2530
2.3270
0.1875
3.8125
2SW-PWR34M46-XX
2 1/8
2.1333
2.1373
2.8793
2.8813
2.875
2.878
0.0013
0.0063
2.1250
2.1230
0.0020
0.0130
2.6257
2.6304
0.2490
0.2530
2.4520
0.1875
3.9375
2SW-PWR36M48-XX
2 1/4
2.2583
2.2623
3.0043
3.0063
3.000
3.003
0.0013
0.0063
2.2500
2.2480
0.0020
0.0130
2.7507
2.7555
0.2490
0.2530
2.5770
0.1875
4.2500
2SW-PWR38M50-XX
2 3/8
2.3835
2.3875
3.1294
3.1314
3.125
3.128
0.0014
0.0064
2.3750
2.3730
0.0021
0.0131
2.8758
2.8805
0.2490
0.2530
2.7020
0.1875
4.5000
2SW-PWR40M52-XX
2 1/2
2.5086
2.5126
3.2544
3.2564
3.250
3.253
0.0014
0.0064
2.5000
2.4980
0.0022
0.0132
3.0008
3.0056
0.2490
0.2530
2.8270
0.1875
4.8750
2SW-PWR44M56-XX
2 3/4
2.7588
2.7628
3.5045
3.5065
3.500
3.503
0.0015
0.0065
2.7500
2.7470
0.0023
0.0143
3.2509
3.2557
0.2490
0.2530
3.0770
0.1875
5.5000
2SW-PWR48M60-XX
3
3.0090
3.0130
3.7546
3.7566
3.750
3.753
0.0016
0.0066
3.0000
2.9970
0.0024
0.0144
3.5010
3.5058
0.2490
0.2530
3.3270
0.1875
6.1875
2SW-PWR52M64-XX
3 1/4
3.2592
3.2632
4.0047
4.0067
4.000
4.003
0.0017
0.0067
3.2500
3.2470
0.0025
0.0145
3.7511
3.7559
0.2490
0.2530
3.5770
0.1875
6.8750
2SW-PWR56M68-XX
3 1/2
3.5095
3.5135
4.2548
4.2568
4.250
4.253
0.0018
0.0068
3.5000
3.4970
0.0027
0.0147
4.0012
4.0060
0.2490
0.2530
3.8270
0.1875
7.6250
2SW-PWR60M72-XX
3 3/4
3.7597
3.7637
4.5049
4.5069
4.500
4.503
0.0019
0.0069
3.7500
3.7470
0.0028
0.0148
4.2513
4.2561
0.2490
0.2530
4.0770
0.1875
8.3750
2SW-PWR64M76-XX
4
4.0099
4.0139
4.7550
4.7570
4.750
4.753
0.0020
0.0070
4.0000
3.9970
0.0029
0.0149
4.5014
4.5062
0.2490
0.2530
4.3270
0.1875
9.0625
2SW-PWR68M80-XX
4 1/4
4.2601
4.2641
5.0051
5.0071
5.000
5.003
0.0021
0.0071
4.2500
4.2470
0.0030
0.0150
4.7515
4.7563
0.2490
0.2530
4.5770
0.1875
9.1875
2SW-PWR72M88-XX
4 1/2
4.5104
4.5144
5.5053
5.5073
5.500
5.503
0.0023
0.0073
4.5000
4.4970
0.0031
0.0151
5.2516
5.2564
0.3740
0.3780
4.9930
0.2500
9.7500
2SW-PWR76M92-XX
4 3/4
4.7606
4.7646
5.7554
5.7574
5.750
5.753
0.0024
0.0074
4.7500
4.7470
0.0032
0.0152
5.5017
5.5065
0.3740
0.3780
5.2430
0.2500
10.0000
2SW-PWR80M96-XX
5
5.0108
5.0148
6.0055
6.0075
6.000
6.003
0.0025
0.0075
5.0000
4.9970
0.0033
0.0153
5.7518
5.7566
0.3740
0.3780
5.4930
0.2500
10.4375
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