THE POWER OF [E]MOTION
P
ol
yC
h
ain® GT Timing Belts
Walther Flender Gruppe
PolyChain® GT Timing Belts
Page
02
Page
THE POWER OF [E]MOTION
We are in motion for you …
… with innovative, new service ideas and individual system solutions which we develop together with you. The Walther Flender
Group stands for expertise, experience and commitment. With top
class technology and craftsman’s know-how in the areas of drive
and conveyor technology, bearing, clamping, and sintering technology, in addition to the automotive sector. We‘re looking forward
to do more for you.
The Walther Flender Group – we are packaged know-how for drive,
conveyor, bearing and clamping technology as well as automotive technology. For more than 70 years as a family company and a
market leader for timing belt drives, we have been offering a complete product range: from individually manufactured single parts,
to drive assemblies and ready-to-install components, to industryspecific complete solutions.
Complete expertise from engineering to implementation
A large proportion of our business today is made up of special
solutions. Experienced engineers from our development department, but also mechatronic engineers and technicians advise you
comprehensively and develop a tailored concept based on your
requirements and assisted by powerful 3D CAD programs. The
products are tested in our own laboratories for their operational
characteristics under various conditions of use, and complete assemblies are tested by means of computer supported simulations.
During this process we work closely together with you in order to
achieve the optimum result.
Comprehensive quality management
The entire Walther Flender Group with its four divisions is certified to DIN EN ISO 9001:2000 and therefore fulfils the high quality
standards required by all of our customers. But you can expect
even more from us. Because individual quality assurance agreements such as special sampling arrangements or companyspecific
performance clauses are equally a given for us. We are pleased to
make our quality management documentation available to you, in
order to ensure the maximum transparency.
New requirements bring new solutions
Markets are changing ever more quickly today. We help to shape
progress with innovations, flexibility and high service consciousness. Our own company development department is involved with
new materials, processes and designs in order to optimise quality
and efficiency even more.
Service – as evident as it is first class
Availability is a key for business success. That is what we stand for
– with our logistics and project execution on the basis of the most
modern ERP systems. Furthermore, our consultants are accessible
to support you at all times. In the after-sales area, we support you
for example in adjusting the belt tension, checking the running
behaviour, or with important installation tips.
The Walther Flender Group – core skills
Drive technology: Timing belt drives, non-positive belt drives,
frequency inverters, gears, assemblies Conveyor technology:
Conveyor units, machine covers, system components Clamping
and bearing technology: Clamping sets, adjusting rings, sliding
bearings Automotive: Steering parts, wheel bearing sets, timing
belts, wiper blades, sensors
Further important information and news about the Walther Flender Group can also be found on the Internet at
www.walther-flender-gruppe.de
Walther Flender Gruppe
PolyChain® GT Timing Belts
Table of contents
Page
03
Page
Page
Introduction
General features
A glance at practice
Design characteristics
Timing belts
Design & components
Models
Timing belt pulleys
Standard timing belt pulleys
Timing belt pulleys – custom models
04
Manufacturing guidelines
11
Assembly & maintenance
14
Technical data
Power output values & belt lengths
Timing belt pitch 8MGT
Timing belt pitch 14MGT
Calculation & formulas
17
Standard line of timing belt pulleys
Pitch 8 mm
Pitch 14 mm
Models
28
Clamping sets
General features
Calculation instructions
Hub coefficient K
Description of models & tables
33
Causes of malfunctions
43
Product overview
44
Project data sheet
45
Important notice: PolyChain® timing belts are not suitable for use in
aircraft drive systems or other drive systems where a defective belt
could result in bodily injury.
Suitable protective measures must be taken to encapsulate exposed
drive systems from unintended access!
Note: All information in this catalogue is subject to change.
Technical details subject to change. Errors excepted.
05
06
07
07
07
08
10
10
10
17
17
20
23
28
30
32
34
34
36
37
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
Page
04
4
Page
Introduction
The new PolyChain® timing belt systems
present a line of timing belts that ensure
up to 8 times higher power transmission
as compared with classic drive systems;
with the same space requirements, up to
30 % more power can be transmitted than
with conventional PolyChain® GT belts.
PolyChain® synchronous belts can be used
in existing PolyChain® GT drive systems;
they use the same pulleys and require no
modifications to the drive.
In addition to the existing PolyChain® GT2
belts, with tensile fibres made of aramid
fiber, Walther Flender Antriebstechnik
GmbH has expanded its product portfolio to include the new PolyChain® GT
­Carbon™ belt. The tensile member of this
belt is made of carbon fibres, which enables the transmission of very high forces in
a compact design.
The PolyChain® GT2 belt construction
is based on an innovative technological
design. The polyurethane mixture used
for the body and teeth of the belt is new
and unique. PolyChain belts are therefore
resistant to many oils, chemicals and fluids,
which means that they have clear advantages over rubber timing belts in operating conditions where they are exposed to
these substances.
Example: Paint stripper drive unit for skid conveyor systems
PolyChain® timing belts are available with
pitches of 8 mm and 14 mm and, with
a reliable power transmission of up to
950 kW, they set completely new standards
in many areas of mechanical engineering.
The completely maintenance-free and
smooth-running PolyChain® belts are especially suitable as a replacement for slowrunning chain drives with high torques.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
Page
05
5
Page
General features
Positive power transmission
The positive meshing of the PolyChain®
belt teeth in the teeth of the drive pulleys
ensures the positive synchronous transmission of power. Slippage and related deviations in speed are eliminated.
No maintenance
While chain drives generally have to be
lubricated and require complex lubricating
systems even for relatively low peripheral
speeds, the PolyChain® timing belt drive
unit operates entirely without lubrication.
This minimizes the design and equipment
requirements, in addition to eliminating
contamination from the area around the
drive unit.
Constant angular velocity
The PolyChain® timing belt wraps around
the timing belt pulley in a circular pattern
and not in the form of a polygon, preventing periodic fluctuations and vibrations.
Noise level
The PolyChain® timing belt drive satisfies
requirements for low noise levels, as confirmed by extensive tests in cooperation
with technical universities. The noise level
is reduced by the special profile of the PolyChain® timing belt and by the c­ apability of
Cost effectiveness
Due to the high transmission capacity
of PolyChain® timing belt drive systems,
the pulley diameter and width can be
reduced substantially as compared with
other drive elements, saving additional
installation space within the machine
constructions.
Constant belt tension
Since PolyChain® timing belts do not elongate due to permanent plastic deformation
when used within the permissible power
range, the belt tension remains constant
once the belt has been adjusted. Due to
minimal stretching during the wear-in
­period, the belt tension can decrease
slightly; one-time re-tightening is necessary only in exceptional cases, eliminating
expensive and time-consuming maintenance at regular intervals.
Drehzahl
dersmallest
kleinsten
Scheibe
(1/min)
Speed
of the
pulley
(1/min)
.
Power and speed range
The power range of PolyChain® timing
belts extends from slow-running drive
units with extremely high torques, such
as those that are typical for heavy chain
drives, to high-performance drive units
with several hundred kW. Belt speeds of
more than 30 m/s are possible, in which
case it may be necessary to provide suitable sound insulation.
10000
5000
1000
PC-8MGT2
100
PC-14MGT2
10
0,1
1
10
100
1000
10000
Berechnungsleistung (kW)
Calculated power output (kW)
.
Diagram 1: Selection diagram: belt pitch PolyChain® GT2
.
Drehzahl
dersmallest
kleinsten
Scheibe
(1/min)
Speed
of the
pulley
(1/min)
With efficiency ratings as high as 98 %,
PolyChain® timing belts are modern drive
train elements that fully meet the trend for
energy-saving drive units.
maintaining the same power transmission
with a narrower belt than those used in
other systems. At high belt speeds, various
options are available for reducing noise;
please ask our application engineers.
10000
5000
1000
PCC-8MGTC
100
PCC-14MGTC
10
0,1
1
10
100
1000
10000
Berechnungsleistung (kW)
Calculated power output (kW)
Diagram 2: Selection diagram: belt pitch PolyChain® GT CarbonTM
.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
06
Page
A glance at practice
From a belt width of 125 mm to 68 mm: Efficient and costeffective drive technology due to innovative carbon tensile
member
CarbonTM
By using the new PolyChain®
timing belt in a heavyduty metal saw, the drive technology engineers at Walther Flender
­Antriebstechnik achieved cost reductions of up to 25 % and therefore more than satisfied the customer‘s requirement for a highperformance and economical timing belt drive system.
With a maximum saw blade diameter of 2.2 meters, the metal saw
of a well-known Austrian component manufacturer is certainly
one of the largest saws on the market. The customer designed the
saw with a time-tested PolyChain® timing belt drive unit. The belt
width was 125 mm. Due to the maximum transferable power of
517.4 kW, the PolyChain® timing belt used for the system achieved
a safety factor of 3.27.
Based on the product presentation of the new PolyChain® GT
Carbon™ belt and extensive technical advice from the Walther
Flender Antriebstechnik sales engineers, the customer decided to
rethink the existing drive unit and to have it checked by the WF
drive technology engineers.
An analysis of the existing design showed that the drive unit was
overrated with the aforementioned safety factor. A safety factor
of 2.0 is fully adequate for this type of drive unit. As a result, one
of two alternative designs with the new PolyChain® GT Carbon™
timing belt was chosen.
The design of the belt drive unit made optimal use of the advantages of the new PolyChain® GT CarbonTM timing belt.
The WF drive technology engineers designed a drive with identical
technology to the existing drive unit with a safety factor of 3.06,
optimizing the system with an adequate safety factor of 2.3. In
the first case, the use of the Carbon timing belt made it possible
to reduce the original belt width from 125 mm to 90 mm, which
reduces costs by about 14 % due to the smaller belt pulleys. In the
optimized design, a timing belt with a width of 68 mm already
achieves the required drive power. This even made it possible to
reduce the costs by 25 %.
The timing belt is driven via the corresponding PolyChain timing
belt pulleys. The belt pulleys are equipped with special teeth that
are precision-cut in the gear hobbing process. Only original timing
belt pulley hobbing cutters are used. Only these original tools
ensure a reliable and long-lasting timing belt drive unit.
The modified timing belt drive unit has passed all test runs so far
and the customer is already convinced of the high performance of
the carbon belt and the advanced technological expertise of the
Walther Flender drive technology engineers.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
07
Page
Design characteristics
Timing belts
Design & components
1
2
1. The tensile member of the PolyChain®
GT CarbonTM belt is made of carbon fibres,
as opposed to the PolyChain® GT2 belt,
which has a tensile member consisting
of aramid fibres. Both fibre types give
the belts their outstanding performance
properties. In addition to exceptional bending fatigue strength, the tensile members
feature high notch impact strength so
they also resist impacts and vibrations.
Unlike polyester, aramid and carbon fibres
are thermally stable and can be used at
extreme temperatures. They are chemically neutral and therefore resistant to oils,
chemicals, dirt and corrosion. Both aramid
and carbon fibres have a higher E-module
than steel cord, with minimal stretching.
3
2. The elastic mixture from which the
back and the cogs of the belt are made is
a polyurethane specially developed and
optimized for good adhesion to the cord
and fabric.
It is:
• highly resistant to chemicals, oils and dirt
• highly resistant to abrasion and therefore
extremely durable
• fully serviceable even at extreme
temperatures (–54 °C to + 85 °C)
3. The surface of the PolyChain® belt is a
specially woven and impregnated nylon
fabric, which reduces friction on the timing
belt pulleys and prevents heat build-up.
This highly abrasion-resistant fabric makes
the PolyChain® belt absolutely maintenance-free and smooth-running. During
the wear-in period, the nylon fabric, which
is specially impregnated in the production process, can show minimal signs
of abrasion, especially at very high belt
speeds. This abrasion is wholly acceptable
and usually stops after only a few hours of
operation.
Note:
With the PolyChain® GT Carbon™ belt, idler pulleys can be used as reverse idlers. However, PolyChain® GT2 belts are sensitive to
the use of reverse idlers. Please observe the handling instructions especially with respect to storage and assembly.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
08
Page
Models
Endless design
Weights per metre in kg for PolyChain® GT2
Pitches
PolyChain® endless timing belts are manufactured with 8 mm and
14 mm pitches and are available in a large assortment of lengths
and widths.
The main dimensions of the timing belt are:
Pitch
(mm)
8
14
Belt width (mm)
12
20
21
36
37
62
68
90
125
0.057
0.099 0.170
0.293
0.158
0.292
0.536 0.709 0.985
Pitch – Pitch length – Width
The timing belt pitch is the distance in millimeters between two
adjacent tooth centres, measured on the timing belt pitch line.
The pitch length is the total circumference of the timing belt in
millimeters, measured on the belt pitch line. The theoretical pitch
line of a PolyChain® timing belt is in the centre of the tensile
member.
The available timing belt lengths and standard widths are listed on
pages 19 and 22.
Dimensions
Pitch (mm)
t
(mm)
ht
(mm)
hS
(mm)
8
14
8
14
3.4
6.0
5.9
10.2
Weights per metre in kg for PolyChain® CarbonTM
Pitch
(mm)
8
14
Belt width (mm)
12
21
36
37
62
68
90
The ordering designation includes the pitch, pitch length and
belt width:
PolyChain® GT2
PC-8MGT 640 - 12
Example:
PC-14MGT 1190 - 37
ht
PolyChain® GT CarbonTM
Example: t
Length tolerances
(in relation to the centre distance of axes; specified in mm)
Belt length
Tolerance
up to 762
above 762 to 1016
above 1,016 to 1,270
above 1,270 to 1,524
above 1,524 to 1,778
above 1,778
+/- 0,30
+/- 0,33
+/- 0,38
+/- 0,41
+/- 0,43
+/– 0.43 mm ± 0.03 mm
for every 254 mm
level for 1778 mm and above
To use PolyChain® timing belts with fixed centre distances of axes,
please consult our application engineers.
PC-8MGT 640 - 12 Carbon
PC-14MGT 1190 - 37 Carbon
or
Width tolerances
For both 8 mm and 14 mm pitches, the tolerance is ±3 % of the
belt width.
125
The weights per metre can vary slightly depending on the belt
construction and the tolerance positions.
or
hs
20
0.056
0.099 0.169
0.291
0.158
0.292
0.537 0.711 0.987
Pitch
(mm)
Pitch length
(mm)
Width
(mm)
8M
14 M
640
1190
12
37
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE
09
Page
Open-ended model (LongLength)
Pitches
PolyChain® GT2 Long Length (LL) timing belts are available with
8 mm and 14 mm pitches.
Dimensions and weights
Designation
Standard
widths
(mm)
PC-LL-8M
PC-LL-14M
12 21 36
20 37
Weight per Maximetre in g mum
(10 mm
roll
belt width) length
47.0
37
t
ht
hS
(mm) (mm) (mm)
30 m
30 m
8
14
3.4
6.0
5.9
10.2
For information about dimensioning for special applications
requiring other dimensions, please consult our application
­engineers.
Technical information
Permissible tangential loads in newtons
(8M: 21 mm belt width, 14M: 37 mm belt width)
Pitch
8M
14M
22
26
3097* 3151
Number of pulley teeth
28
30
34
38
40
≥ 44 ≥ 52
3206 3237 3269
3278
9900*
10 204
10400
10599
* Minimum number of teeth 22 (8M) or 28 (14M)
Minimum tensile strength in newtons
Pitch
8M
14M
Belt width in mm
20
21
11 254
20568
12
5787
36
19291
37
38054
Ordering designation
The ordering designation includes the belt width, pitch length
and roll length:
PC-21-LL-8M 30M
Example:
Width (mm)
Pitch (mm)
Roll length (mm)
21
8M
30M
Technical data of the PolyChain® CarbonTM Long Length timing
belt is available on request.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 10
Timing belt pulleys
PolyChain® timing belt pulleys are equipped with special precision-cut teeth in the gear hobbing process. Only original timing
belt pulley hobbing cutters are used. Only these original tools
ensure a reliable and long-lasting timing belt drive unit.
Only ­PolyChain® timing belts and PolyChain® timing belt
pulleys with the same pitch can be used together.
The main features of the timing belt pulley are:
Standard timing belt pulleys
The information on pages 23 to 26 describes our extensive line of
standard timing belt pulleys with and without taper lock clamping
bushes.
Standard pulleys are available for the following belt widths:
Pitch designation
Number of teeth, pitch, width, design
The pitch of the timing belt pulley is measured on the pitch
diameter and is the distance between the centres of two adjacent
hollows. The pulley pitch diameter is always outside the outer diameter of the timing belt pulley and is congruent with the timing
belt pitch line.
Pitch line
8M
12
21
36
62
Nominal belt
width in mm
14M
37
68
90
125
Standard timing belt pulleys are statically balanced; for drive
systems with v > 30 m/s, please ask.
Pitch diameter
Ordering designation
O
r
ute
The ordering designation for PolyChain® timing belt pulleys
includes the following:
r
ete
m
dia
8M - 48S - 36 3F
Pitc
h
Pitch
Number of
teeth
Pulley width designation (mm)
Design
8M
48
36
3F
Timing belt pulleys – standard and custom models
Timing belt pulleys – custom models
Standard timing belt pulleys are adequate for the requirements of
many drive systems with respect to functionality and space conditions and are available on a short-term basis.
Although the PolyChain® standard timing belt pulleys are available
with different numbers of teeth and pulley designs for a broad
range of applications, many applications require custom solutions
with specially designed pulleys.
For heavy-duty, precise drives requiring exact positioning, however,
we recommend custom timing belt pulleys that we manufacture
according to your drawings. Numerous custom teeth are available,
for example for essentially backlash-free or quiet drive systems.
In addition to the standard cast, aluminum and steel timing belt
pulleys, pulleys made of numerous other materials, also with surface treatment, are available. Please ask our application engineers.
Due to the high specific bearing percentage, standard aluminum
(e.g. AlZn5,5MgCu) should generally be surface treated, for example hard coated, to ensure high wear resistance.
For shaft and hub connections, we offer an extensive line of
self-centring clamping sets: an overview of models can be found
starting on page 37.
We have adapted our production facilities to accommodate
such solutions.
We can deliver any timing belt pulley you require, based on your
drawings; special processing, such as grinding, balancing or surface
treatment, is also available.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 11
Manufacturing guidelines
Due to the high belt loads and speeds that can occur, the use of
non-wearing materials is preferable.
We offer an extensive selection of pulleys made of steel, sintered
metal and polymer, in addition to high-strength aluminum.
The specified minimum pulley diameters should always be
­observed: 60 mm for 8 mm pitch and 130 mm for 14 mm pitch.
Recommended pulley widths
Tooth code
­designation
8M
14M
Pulley
width ­
designation *
Smallest tooth
width
G
mm
Smallest pulley
width with
rim flanges**
E
mm
12
21
36
62
20
37
68
90
125
14
23
38
65
23
40
71
95
130
18
27
42
70
27
46
77
101
136
* Corresponds to the nominal belt width in mm.
** The specified pulley widths include a material allowance for
producing the rim flanges and should always be taken into
account.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 12
Position & shape tolerances
The tooth surface quality, dimensional accuracy and pitch accuracy
and the position and shape tolerances of the timing belt pulley
have a significant influence on how smooth the drive system
operates.
Since the outer diameter of the pulleys is also surface milled
during the hobbing process, turning produces blanks that are
larger than the finished product.
In finished state, the outer diameter has an especially close
tolerance.
– Tolerances of standard timing belt pulleys
Outer diameter (mm)
above
to
50
100
101
175
176
300
301
500
501
800
Permissible deviation (mm)
+ 0.10
+ 0.13
+ 0.15
+ 0.18
+ 0.20
– Tolerances for custom timing belt pulleys
all dimensions in mm
– Bore dimensions of standard pulleys
We recommend a tolerance in the range of IT 7 for the final bore.
– Temperature expansion coefficient a
of the timing belt pulley materials
Thermal effects of the drive system can cause thermal ex­
pansion of the pulley diameters, which can affect the belt
tension. ­Therefore, you should take into account the following
thermal e­ xpansion coefficients in case of extreme tempera­ture
fluctuations:
Steel:
12,0 · 10–6 1/K
Aluminum:
23,5 · 10–6 1/K
– Balancing
Rotationally symmetric timing belt pulleys machined on all sides
for standard drive systems do not need to be balanced.
High-speed timing belt pulleys for precise drive systems are
­balanced according to DIN/ISO 1940 (previously VDZ 2060).
In case of a quality grade of less than 6.3, please contact our
­application engineers.
Permissible
Rough
Outer diameter (mm) Permissible
above
to
tolerance c­ oncentricity tolerance ­allowance da+
50
100
+ 0.08
0.05
101
150
+ 0.10
0.07
151
200
+ 0.12
0.1
201
300
+ 0.15
1.0 mm
0.12 +
301
500
+ 0.18
0.03 pro
501
...
+ 0.20
100 mm
Concentricity
Runout
– Run-out tolerance
Outer diameter range
(mm)
Permissible deviations
(mm)
to
101.60
0.10
above
to
101.60
250.00
above
251.00
0.1 + 0.1 mm
per 100 mm outer diameter
0.25 + 0.05 mm
per 100 mm outer diameter
Ou
ter
dia
me
ter
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 13
Rim flanges
8°min
25°max
x min.
Dmin = 0.5
It should be noted, however, that the driven timing belt pulley
should always be equipped with double flanges, since this makes
it easier to guide the slack side. For very large centre distances
of axes (> 8 · d) and transmission ratios of 1 : 3 or higher and for
­vertical shaft positions, both timing belt pulleys should have
double flanges.
Poly Chain® 8M
Number of teeth
22
23
24
25
26 – 27
28 – 29
30
31 – 32
33
34 – 35
36
37 – 38
39 – 40
41 – 42
43
44 – 45
46 – 48
49 – 51
52 – 53
54 – 55
56 – 57
58 – 61
62 – 64
65 – 67
68 – 70
71 – 73
74 – 77
78 – 83
84 – 92
93
94 – 99
100 – 107
xmin = 6.0 mm
S
Ø A ± 0.15
Ø B ± 0.5
The rim flanges are bevelled for better guidance of the timing
belt when it runs onto the pulley. Straight rim flanges sometimes
have the disadvantage that, if the shaft is not aligned precisely,
the belt tooth can run onto the inside edge of the flange, resulting
in premature wear. Therefore, we do not recommend using straight
rim flanges without a bevel.
Ø C ± 0.5
We offer an extensive standard line of galvanized steel flanges;
please use the rim flange dimensions in the following tables for
your design.
D
Outer Ø
Rim flanges for belt guidance
Poly Chain® timing belt pulley drive systems are designed with
a double flanged pulley for guiding the timing belt. To reduce
costs, the smaller timing belt pulley is frequently provided for this
purpose.
Dmin: Minimum material overlap for functional rolling of rim flange
Note: depending on the angle, the outer edge of the rim flange
may not be flush with the front face of the timing belt pulley!
Poly Chain® 14M
Code
18 L
14 H
15 H
16 H
17 H
18 H
19 H
20 H
21 H
22 H
23 H
24 H
25 H
26 H
27 H
28 H
30 H
32 H
33 H
34 H
36 H
38 H
40 H
42 H
44 H
46 H
48 H
L216
L238
L260
L260 S
L280
A (mm)
48
47
51
53
57
60
64
68
73
76
79
82.5
87
91
97
99
107
116
120
126
132
140
148
156
164
172
180
190
200
210
230
230
B (mm)
54
57
60.5
64
68
72
76
79
84
88
91
96
100
105
109
114
121
129
134
139
145
154
161
170
177
186
195
–
–
–
–
–
C (mm)
60
63
66.5
71
75
79
83
87
91
93
97
103
106
111
115
119
127
135
140
146
152
160
168
176
184
192
200
216
238
260
260
280
s (mm)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2
2
2.5
2
2.5
Number of teeth
Code
A (mm) B (mm)
28
L138
105
–
29 – 30
L142
90
–
31 – 32
L156
105
–
33 – 34
L172
115
–
35 – 38
L186
130
–
39 – 43
L200
144
–
44 – 46
L215
160
–
47 – 49
L230
190
–
50 – 52
L242
185
–
53 – 55
L260
210
–
56 – 59
L280
230
–
60 – 64
L300
250
–
65 – 68
L320
260
–
69 – 73
L340
280
–
74 – 79
L372
300
–
80 – 84
L385
330
–
85 – 92
L420
360
–
> 92 no standard flange, flange has to be adapted.
xmin = 6.0 mm
C (mm)
138
142
156
172
186
200
215
230
242
260
280
300
320
340
372
385
420
s (mm)
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 14
Assembly & maintenance
Installation
Proper handling during installation of the timing belt is very
important. Avoid bending, twisting, winding or kinking the belts.
Under no circumstances should force be applied to put the timing
belt on the pulleys.
max. 0.25°
max. 5 min. / 1 m
Installation guidelines
For the belt to run straight, it is essential to carefully align the
shafts and timing belt pulleys so they are parallel. Impermissible
deviations from parallel cause different edge tensions in the belt,
causing the belt to run off toward the side with the highest tension or to run up against the flange. At high speeds, the latter can
cause excessive noise and excessive wear of the belt. In the case of
larger centre distances of axes, it is more difficult to align the shafts
precisely, increasing the tendency for the timing belt to run off to
one side. Therefore, take measures to ensure that the belt does not
run off the face of the timing belt pulleys. It may be necessary to
move the driven pulley slightly.
Electrical conductivity
Tests have shown that PolyChain® timing belts do not conduct
electricity under dynamic operating conditions. This can result
in static electricity with uncontrolled malfunctions. If PolyChain®
­timing belts are used in potentially explosive areas, we recommend taking measures to ensure that no electrical charge can
­occur before operating the system. This means that the entire
system has to be properly earthed.
Ambient influences
Temperatures
PolyChain® timing belts can generally be used in a temperature
range between –54 °C and +85 °C. For operating conditions outside of this temperature range, please contact us.
Chemical resistance
Field and lab tests guarantee resistance against many acids, caustic
solutions, grease and oil. Of course, the service life and durability of
the timing belt also depend on the concentration of the substance
to which it is exposed (e.g. droplets, spray or constant immersion).
For special applications, please ask our application engineers.
Adjustment tolerances
Since fixed (non-adjustable) centre distances of axes can be
­recommended only for slow-running drive systems, the use of
a PolyChain® timing belt drive system requires that the timing
belt can easily be installed and that the belt tension can be
precisely adjusted. The mounting dimension must allow for easy
mounting of the belt on a timing belt pulley with rim flanges.
The minimum dimensions for the respective centre distances of
axes are listed in the tables below. The travel of the centre distance
of axes for mounting and adjustment of the belt tension is shown
in the right column.
Adjustment tolerances without rim flange
Belt length
(mm)
to
1000
from 1000
up to 1780
from 1780
up to 2540
from 2540
up to 3300
from 3300
up to 4600
Travel (mm) for
mounting the
timing belt
Travel (mm) for
adjusting the timing
belt tension
1.8
0.8
2.8
0.8
3.3
1.0
4.1
1.0
5.3
1.3
Adjustment tolerances with rim flange
Pitch
Rim flanges on one
timing belt pulley
(mm)
Rim flanges on both
timing belt pulleys
(mm)
8 mm
14 mm
21.8
31.2
33.3
50.0
Fixed centre distance of axes
Belts with a pitch of 8M can be used up to a pitch length of
ca. 1,600 mm for slow running drives (n ≤ 100 rpm) with fixed centre distances of axes; the tolerance for the centre distance of axes
should be within the calculated range of 0 to –0.2 mm. Since the
pulley diameter should also be within close tolerances, please ask
our application engineers.
Idlers
Idlers should only be used on drive systems with a fixed centre
distance of axes and should be mounted on the inside of the slack
side. We recommend using idlers with up to 40 teeth. For larger
diameters, smooth idlers without teeth can also be used. An idler
exerting force on the back should not be used with aramid belts,
since they have a negative effect on the service life due to the
special construction of the timing belts. For carbon belts, the minimum diameter for outer idlers is 70 mm for a pitch of 8 mm and
150 mm for a pitch of 14 mm. Inner idlers should not be smaller
than the smallest power transmitting timing belt pulley. To maximize the number of meshing teeth on the small timing belt pulley,
it is recommended to position the idler near the large pulley on
the slack side. If the belt touches the idler with only one tooth, this
can result in high noise levels. It is better to have several belt teeth
mesh with the pulley.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 15
Belt tension
The Poly Chain® timing belt needs a certain tension during operation to maintain reliable engagement of the teeth also under
intermittent loads and temporary overloads. Unnecessarily high
initial tension reduces the service life of the drive system, increases
wear on the bearings and the teeth, and also increases the noise
level. Insufficient tension can prevent the belt teeth from meshing properly in the pulley teeth, which can even cause the belt to
skip in case of an overload. Depending on the application and the
particular dynamic peak loads, the belt tension can deviate from
the calculated initial tension, so that the calculation provided here
should be used only as a recommendation for standard applications. This applies especially to drive systems with extreme impact
and pulse loads; in this case, please contact us.
1. Frequency measurement
A precise method for pre-setting the correct belt tension is to
measure the frequency with the WF Tension Meter (Figure 1) or
the Gates-Sonic Tension Meter (Figure 2). With a sensing head
that is held above the installed belt it is possible to measure the
­frequency at the pre-tensioned belt in order to achieve the optimum belt tension.
The calculated oscillation frequency f [Hz] depends on the freely
oscillating span length L [m], the static initial tension load FSt [N]
and the weight per meter m [kg/m] of the belt and corresponds
to the relationship
f=
1
2·L
·
√ Fm
St
Calculation of the static initial load
FSt = K · Pv+ m · v2
FSt [N]
= Static initial tension
P [kW]
= Installed motor power output
v [m/s] = Belt speed
K = 600
m
= Factor for weight per metre, see table
K
= Constant for compensating for
impact loads
max. initial tension for compensating for pulse loads
Figure 1:
WF Tension Meter
Figure 2:
Gates Sonic Tension
Meter 507C
For a detailed description of the instruments and detailed calculation documentation, please contact our application engineers.
2. Test load method
Pitch
Belt width (mm)
12
21
36
62
20
14 mm
37
68
90
125
Table: Calculation factors for belt tension
8 mm
m
Y
0.057
0.098
0.167
0.290
0.158
0.291
0.536
0.711
0.986
80
140
240
413
245
454
834
1103
1530
Belt width (mm)
12
21
36
62
20
37
14 mm
68
90
125
Table: Minimum initial tension of PolyChain® timing belts
8 mm
S
d
FP
S=
If the transmission capacity is significantly higher than the calculated capacity of the belt, the calculations can result in incorrect
belt tensions. In this case, please use the minimum initial tensions
specified in the following table:
Pitch
Calculation of deflection
Min. Fst
Values (N)
125
220
375
645
530
980
1800
2380
3310
Checking the belt tension
Two methods can be used for checking the belt tension:
1. Frequency measurement and 2. Test load method
√A – [ d
2
wG
– dwk
2
]
2
S
:
d :
dwk :
dwG :
FP :
A :
Span length for test force measurement (mm)
Deflection (mm)
Pitch diameter of the small pulley (mm)
Pitch diameter of the large pulley (mm)
Test force (N)
Centre distance of axes (mm); separate tables are available
for the calculation and will be provided on request.
If the span tension is set correctly, the deflection is
d ~ 1/100 · S
Calculation of test force
FP =
S
·Y
lw
25
FSt +
FP : Test force (N)
FSt : Static initial tension
lw : Pitch length (mm)
Y : Constant (see table)
Adjusting the initial tension
For the calculated test force, the deflection should be ca. 1/100 of
the span length [mm] of the test force measurement. It may be
necessary to correct the belt tension.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 16
Storage & maintenance
PolyChain® timing belts require no special maintenance. During the wear-in period of heavy-duty drive systems there may be some
reduction in the belt tension; in this case, it is necessary to retighten the belts only once with 50 % of the original initial tension.
When storing belts, they should never be kinked or folded tightly, because this can damage the tensile members. Therefore, we recommend that timing belts be stored in the original package until needed; during storage, belts should be protected from extreme temperatures, humidity and UV radiation.
Clamping elements
For secure fastening of the timing belt pulley to the shaft, you can
use the conventional feather key connection or any number of
frictionally engaged, removable clamping elements for all standard
bore dimensions.
In addition to the TL (TaperLock®) bushes used primarily for standard pulleys, we offer an extensive line of cylindrical inner and outer
clamping sets, which are especially suitable to fulfil requirements
for optimal true running properties.
Please note the required minimum hub and minimum wall thicknesses to ensure reliable use of the clamping sets; please contact
us before using aluminum pulleys.
Further information on our clamping sets can be found starting
on page 33.
Advantages of the positive locking cylindrical clamping
­elements:
– Easy mounting and removal
Mounting and removal by tightening or loosening the clamping
screws using conventional tools. A precise torque can be achieved
by using a torque wrench.
Oil the clamping set lightly when mounting it. Do not use oil containing molybdenum disulfide and do not use grease.
– Backlash-free connection
The clamping sets provide a positive-locking, backlash-free connection that can be released at any time.
– Large machining tolerances
The following fitting combinations are recommended:
Tolerances in the shaft diameter: h 7/h 9
Tolerances in the hub bore diameter: H 7/H 9
Surface roughness ≤ RZ 16
The runout error is between 0.02 and 0.04 mm, depending on the
model; all clamping elements listed here are self-centring.
– High fatigue strength
No weakening of the shaft and pulley bore by keyways.
– Easy adjustment
Since no profile end mating is necessary, the components can
be fastened at a precise angle in any required position.
– Overload protection
If the maximum torque is exceeded, slippage of the clamping
set prevents damage to the connected parts. Repeated slipping
should be avoided.
– Economical connection
An economical shaft/hub connection, due to ease of
manufacturing the smooth cylindrical shaft and bore fit.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 17
Technical data
Power output values & belt lengths
Timing belt pitch PC - 8MGT and PC - 8MGT Carbon
Calculation of the dimensions and design of belt drive units can
be based on the motor side (motor power output) and on the
load side (load collectives). Both calculations – depending on
the existing safety factors, desired service life or any load-­side
efficiency losses – can result in designs for drive systems with
­ ifferent overall widths. In addition to the load value calculation,
d
therefore, we also recommend that you use the following power
output table to compare the actual tangential loads with the
­maximum permissible loads.
Maximum permissible tangential loads
The values listed in the following tables represent the operationally useable tangential loads. The listed values apply to quasistatic loads, i.e. for low speed ranges (n ≤ 100 rpm) with the use of
timing belt pulleys with at least 34 teeth.
The initial tensions for mounting of the belts are already included
in the power output values and do not have to be subtracted from
the listed values.
PolyChain® GT2
PolyChain® GT Carbon™
Belt width
Fzul
(mm)
(N)
12
2012
21
3521
36
6037
62
10397
Belt width
Fzul
(mm)
(N)
12
2404
21
4208
36
7213
62
12431
Power output in kW / 12 mm belt width
Note: The following power output data was obtained in extensive series of tests on the basis of defined service life values and
includes safety factors that were defined internally beforehand
to achieve the corresponding service life. Therefore, the power
­ utput data cannot be compared directly with data of other
o
manufacturers; if you have any questions, please contact our
­application engineers.
PolyChain® GT2
Power output of the small timing belt pulley
Speed
of the
small
pulley
10
20
40
60
100
200
300
400
500
600
700
730
800
900
1,000
1,200
1,400
1,460
1,600
1,800
2,000
2,400
2,800
2,880
3,200
3,500
4,000
4,500
5,000
5,500
22
25
28
30
32
34
36
38
40
56.02
63.66
71.30
76.39
81.49
86.58
91.67
96.77 101.86 114.59 122.23 127.32 142.60 152.79 162.97 190.99 203.72
0.10
0.16
0.25
0.34
0.51
0.90
1.26
1.61
1.94
2.26
2.58
2.67
2.89
3.19
3.49
4.07
4.64
4.81
5.19
5.73
6.27
7.30
8.29
8.49
9.26
9.97
11.11
12.22
13.30
14.34
0.12
0.18
0.30
0.40
0.60
1.07
1.51
1.92
2.33
2.72
3.11
3.22
3.48
3.85
4.22
4.93
5.62
5.82
6.30
6.96
7.61
8.88
10.11
10.35
11.30
12.18
13.59
14.97
16.30
17.58
0.14
0.21
0.34
0.46
0.70
1.24
1.75
2.24
2.71
3.17
3.63
3.76
4.07
4.50
4.93
5.77
6.59
6.83
7.39
8.17
8.94
10.44
11.90
12.19
13.31
14.35
16.03
17.66
19.23
20.76
0.15
0.23
0.37
0.50
0.76
1.35
1.91
2.45
2.97
3.47
3.97
4.12
4.46
4.93
5.41
6.33
7.23
7.49
8.11
8.97
9.82
11.48
13.08
13.40
14.64
15.78
17.63
19.43
21.16
22.83
0.16
0.24
0.40
0.54
0.82
1.47
2.07
2.66
3.22
3.77
4.31
4.47
4.84
5.36
5.88
6.88
7.86
8.15
8.83
9.77
10.69
12.50
14.25
14.60
15.95
17.20
19.22
21.17
23.06
24.88
0.17
0.26
0.43
0.58
0.88
1.58
2.23
2.86
3.47
4.07
4.65
4.83
5.23
5.79
6.34
7.43
8.50
8.81
9.54
10.56
11.56
13.52
15.41
15.79
17.26
18.60
20.79
22.90
24.93
26.89
0.18
0.28
0.46
0.62
0.94
1.69
2.39
3.07
3.72
4.36
4.99
5.18
5.61
6.21
6.81
7.98
9.12
9.46
10.24
11.34
12.42
14.53
16.57
16.97
18.55
20.00
22.34
24.60
26.78
28.87
0.19
0.29
0.48
0.66
1.00
1.80
2.55
3.27
3.97
4.66
5.33
5.53
5.99
6.63
7.27
8.53
9.75
10.11
10.95
12.12
13.28
15.53
17.71
18.14
19.83
21.38
23.88
26.29
28.60
30.83
0.20
0.31
0.51
0.70
1.07
1.91
2.71
3.48
4.22
4.95
5.66
5.87
6.36
7.05
7.73
9.07
10.37
10.76
11.65
12.90
14.13
16.52
18.85
19.30
21.10
22.74
25.40
27.95
30.40
32.74
45
0.23
0.35
0.58
0.80
1.22
2.19
3.10
3.98
4.84
5.68
6.50
6.74
7.30
8.09
8.88
10.41
11.91
12.35
13.38
14.82
16.23
18.98
21.65
22.17
24.22
26.10
29.12
32.02
34.78
37.40
Max. power output = (Table output + additional output) x length factor x width factor
48
0.24
0.38
0.63
0.86
1.31
2.35
3.33
4.28
5.21
6.11
6.99
7.25
7.86
8.71
9.56
11.21
12.82
13.30
14.41
15.96
17.48
20.44
23.30
23.86
26.07
28.08
31.31
34.39
37.32
50
0.25
0.40
0.66
0.90
1.37
2.46
3.49
4.48
5.45
6.39
7.32
7.59
8.23
9.12
10.01
11.74
13.43
13.93
15.09
16.71
18.30
21.40
24.39
24.98
27.28
29.38
32.75
35.95
38.98
56
0.29
0.45
0.74
1.02
1.54
2.78
3.95
5.08
6.18
7.25
8.30
8.61
9.33
10.35
11.35
13.31
15.23
15.80
17.11
18.95
20.75
24.25
27.63
28.28
30.87
33.21
36.96
60
0.31
0.48
0.80
1.09
1.66
3.00
4.26
5.47
6.66
7.81
8.94
9.28
10.06
11.15
12.23
14.35
16.42
17.03
18.44
20.42
22.36
26.13
29.74
30.44
33.20
35.70
39.68
64
0.33
0.51
0.85
1.17
1.78
3.21
4.56
5.87
7.13
8.37
9.59
9.95
10.78
11.96
13.11
15.38
17.60
18.25
19.76
21.88
23.96
27.97
31.82
32.57
35.50
38.14
75
0.39
0.60
1.00
1.38
2.10
3.79
5.39
6.93
8.43
9.90
11.33
11.76
12.75
14.13
15.50
18.18
20.79
21.56
23.34
25.83
28.25
32.93
37.38
38.24
41.58
80
0.41
0.64
1.07
1.48
2.25
4.05
5.76
7.41
9.02
10.58
12.12
12.58
13.63
15.11
16.58
19.44
22.22
23.04
24.94
27.58
30.16
35.13
39.82
40.73
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 18
PolyChain® GT Carbon™
Power output of the small timing belt pulley
Speed
of the
small
pulley
10
20
40
60
100
200
300
400
500
600
700
800
900
1,000
1,200
1,400
1,600
1,800
2,000
2,400
2,800
3,200
3,500
4,000
4,500
5,000
5,500
Number of teeth
38
40
45
Pitch diameter
56.02 63.66 71.30 76.39 81.49 86.58 91.67 96.77 101.86 114.59
0.11
0.13
0.15
0.17
0.18
0.19
0.21
0.22
0.23
0.26
0.17
0.21
0.24
0.26
0.28
0.31
0.33
0.35
0.37
0.42
0.29
0.34
0.40
0.44
0.48
0.51
0.55
0.59
0.63
0.72
0.39
0.47
0.55
0.61
0.66
0.71
0.76
0.82
0.87
1.00
0.59
0.72
0.84
0.93
1.01
1.09
1.17
1.26
1.34
1.54
1.06
1.29
1.53
1.68
1.83
1.99
2.14
2.29
2.44
2.82
1.50
1.84
2.17
2.40
2.62
2.84
3.06
3.28
3.50
4.05
1.92
2.36
2.80
3.09
3.38
3.67
3.95
4.24
4.53
5.24
2.33
2.87
3.41
3.77
4.12
4.47
4.83
5.18
5.53
6.40
2.73
3.37
4.01
4.43
4.85
5.27
5.68
6.10
6.51
7.54
3.12
3.86
4.59
5.08
5.56
6.05
6.53
7.01
7.48
8.67
3.50
4.34
5.17
5.72
6.27
6.81
7.36
7.90
8.44
9.78
3.88
4.81
5.74
6.35
6.96
7.57
8.18
8.78
9.38 10.88
4.25
5.28
6.30
6.98
7.65
8.32
8.99
9.65 10.32 11.96
4.98
6.20
7.41
8.21
9.00
9.80 10.59 11.37 12.16 14.10
5.69
7.10
8.49
9.41 10.33 11.25 12.16 13.06 13.97 16.21
6.39
7.98
9.56 10.60 11.64 12.67 13.70 14.73 15.75 18.28
7.08
8.85 10.61 11.77 12.93 14.08 15.22 16.37 17.50 20.32
7.75
9.71 11.64 12.92 14.20 15.46 16.73 17.98 19.23 22.34
9.07 11.38 13.67 15.18 16.69 18.19 19.68 21.16 22.63 26.29
10.36 13.02 15.65 17.39 19.12 20.84 22.56 24.26 25.95 30.15
11.61 14.61 17.59 19.55 21.51 23.45 25.38 27.29 29.20 33.92
12.53 15.79 19.01 21.14 23.26 25.36 27.45 29.53 31.59 36.69
14.03 17.71 21.34 23.74 26.13 28.49 30.84 33.17 35.48 41.19
15.49 19.58 23.62 26.28 28.92 31.54 34.14 36.71 39.27 45.56
16.92 21.41 25.84 28.76 31.65 34.51 37.35 40.16 42.95 49.79
18.31 23.19 28.00 31.17 34.31 37.41 40.48 43.51 46.52 53.87
22
25
28
30
32
34
36
48
122.23
0.28
0.45
0.77
1.08
1.66
3.05
4.37
5.66
6.92
8.16
9.38
10.58
11.77
12.95
15.27
17.55
19.79
22.00
24.18
28.46
32.64
36.71
39.70
44.56
49.27
53.81
50
127.32
0.30
0.48
0.81
1.13
1.74
3.20
4.59
5.94
7.27
8.57
9.85
11.11
12.36
13.60
16.04
18.43
20.79
23.12
25.41
29.91
34.29
38.56
41.70
46.79
51.71
56.45
56
142.60
0.34
0.54
0.92
1.28
1.98
3.64
5.23
6.78
8.30
9.78
11.25
12.70
14.13
15.54
18.33
21.08
23.78
26.44
29.06
34.19
39.19
44.05
47.61
53.36
60
152.79
0.36
0.58
0.99
1.39
2.14
3.94
5.66
7.34
8.98
10.59
12.18
13.75
15.30
16.83
19.86
22.83
25.75
28.63
31.47
37.02
42.41
47.65
51.48
57.66
64
162.97
0.39
0.62
1.07
1.49
2.30
4.24
6.09
7.89
9.66
11.39
13.11
14.79
16.46
18.11
21.37
24.57
27.71
30.81
33.86
39.82
45.60
51.21
55.30
75
190.99
0.46
0.74
1.27
1.77
2.74
5.04
7.25
9.41
11.51
13.59
15.63
17.65
19.64
21.61
25.49
29.30
33.04
36.72
40.34
47.39
54.20
60.76
80
203.72
0.49
0.79
1.36
1.89
2.93
5.41
7.78
10.09
12.35
14.58
16.77
18.93
21.07
23.18
27.34
31.43
35.44
39.38
43.24
50.77
58.02
Max. power output = (Table output + additional output) x length factor x width factor
Design information on page 23
Additional power output [kW] for step-down ratio
PolyChain® GT2:
Speed of the
small pulley
200
300
400
500
600
700
730
800
900
1,000
1,200
1,400
1,460
1,600
1,800
2,000
2,400
2,800
2,880
3,200
3,500
4,000
4,500
5,000
5,500
1
to
1.04
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
1.05
to
1.11
0.01
0.02
0.03
0.03
0.04
0.05
0.05
0.05
0.06
0.06
0.08
0.09
0.09
0.10
0.12
0.13
0.16
0.18
0.19
0.21
0.23
0.26
0.29
0.32
0.36
1.12
to
1.19
0.03
0.04
0.05
0.07
0.08
0.09
0.09
0.10
0.12
0.13
0.16
0.18
0.19
0.21
0.23
0.26
0.31
0.36
0.37
0.42
0.46
0.52
0.59
0.65
0.72
1.2
to
1.3
0.04
0.06
0.08
0.10
0.12
0.14
0.14
0.16
0.18
0.20
0.23
0.27
0.28
0.31
0.35
0.39
0.47
0.55
0.56
0.62
0.68
0.78
0.88
0.98
1.07
1.31
to
1.45
0.05
0.08
0.10
0.13
0.16
0.18
0.19
0.21
0.23
0.26
0.31
0.36
0.38
0.42
0.47
0.52
0.62
0.73
0.75
0.83
0.91
1.04
1.17
1.30
1.43
1.46
to
1.65
0.07
0.10
0.13
0.16
0.20
0.23
0.24
0.26
0.29
0.33
0.39
0.46
0.47
0.52
0.59
0.65
0.78
0.91
0.94
1.04
1.14
1.30
1.46
1.63
1.79
Additional power output [kW] for step-down ratio
PolyChain® CarbonTM:
1.66
to
1.99
0.08
0.12
0.16
0.20
0.23
0.27
0.28
0.31
0.35
0.39
0.47
0.55
0.57
0.62
0.70
0.78
0.94
1.09
1.12
1.25
1.37
1.56
1.76
1.95
2.15
2
to
2.63
0.09
0.14
0.18
0.23
0.27
0.32
0.33
0.36
0.41
0.46
0.55
0.64
0.66
0.73
0.82
0.91
1.09
1.27
1.31
1.46
1.59
1.82
2.05
2.28
2.50
2.64
to
4.47
0.10
0.16
0.21
0.26
0.31
0.36
0.38
0.42
0.47
0.52
0.62
0.73
0.76
0.83
0.94
1.04
1.25
1.46
1.50
1.66
1.82
2.08
2.34
2.60
2.86
2.15
Speed of the 1.00 1.02 1.05 1.10 1.15 1.21 1.30 1.43 1.64
and
small pulley 1.02 1.05 1.10 1.15 1.21 1.30 1.43 1.64 2.15
over
20
0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.01
40
0.00 0.00 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.02
60
0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.02 0.03 0.03
100
0.00 0.01 0.01 0.02 0.02 0.03 0.04 0.04 0.05 0.05
200
0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.09 0.11
300
0.00 0.02 0.04 0.05 0.07 0.09 0.11 0.12 0.14 0.16
400
0.00 0.02 0.05 0.07 0.09 0.12 0.14 0.17 0.19 0.21
500
0.00 0.03 0.06 0.09 0.12 0.15 0.18 0.21 0.24 0.27
600
0.00 0.04 0.07 0.11 0.14 0.18 0.21 0.25 0.28 0.32
700
0.00 0.04 0.08 0.12 0.17 0.21 0.25 0.29 0.33 0.37
800
0.00 0.05 0.09 0.14 0.19 0.24 0.28 0.33 0.38 0.43
900
0.00 0.05 0.11 0.16 0.21 0.27 0.32 0.37 0.43 0.48
1,000
0.00 0.06 0.12 0.18 0.24 0.30 0.36 0.42 0.47 0.53
1,200
0.00 0.07 0.14 0.21 0.28 0.36 0.43 0.50 0.57 0.64
1,400
0.00 0.08 0.17 0.25 0.33 0.42 0.50 0.58 0.66 0.75
1,600
0.00 0.10 0.19 0.29 0.38 0.47 0.57 0.66 0.76 0.85
1,800
0.00 0.11 0.21 0.32 0.43 0.53 0.64 0.75 0.85 0.96
2,000
0.00 0.12 0.24 0.36 0.47 0.59 0.71 0.83 0.95 1.07
2,400
0.00 0.14 0.28 0.43 0.57 0.71 0.85 1.00 1.14 1.28
2,800
0.00 0.17 0.33 0.50 0.66 0.83 1.00 1.16 1.33 1.50
3,200
0.00 0.19 0.38 0.57 0.76 0.95 1.14 1.33 1.52 1.71
3,500
0.00 0.21 0.41 0.62 0.83 1.04 1.25 1.45 1.66 1.87
4,000
0.00 0.24 0.47 0.71 0.95 1.19 1.42 1.66 1.90 2.14
4,500
0.00 0.27 0.53 0.80 1.07 1.34 1.60 1.87 2.14 2.40
5,000
0.00 0.30 0.59 0.89 1.19 1.48 1.78 2.08 2.37 2.67
5,500
0.00 0.33 0.65 0.98 1.30 1.63 1.96 2.28 2.61 2.94
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 19
Timing belt pulley diameter
Standard lengths and length correction
factors S6
Standard widths 12, 21, 36, 62 mm
Pitch length
(mm)
Length
­correction
factor
Number
of teeth
640
720
800
896
960
1,000
1,040
1,120
1,200
1,224
1,280
1,440
1,600
1,760
1,792
2,000
2,200
2,240
2,400
2,520
2,600
2,800
2,840
3,048
3,200
3,600
4,000
4,400
4,480
0.79
0.83
0.87
0.91
0.94
0.96
0.97
1.00
1.03
1.03
1.05
1.10
1.14
1.17
1.18
1.22
1.26
1.26
1.29
1.31
1.32
1.35
1.36
1.38
1.40
1.45
1.49
1.52
1.53
80
90
100
112
120
125
130
140
150
153
160
180
200
220
224
250
275
280
300
315
325
350
355
381
400
450
500
550
560
Width factor S7
Belt width
Width factor
12
1
21
1.75
36
3.00
62
5.17
Timing belts in custom lengths*
Number
of teeth
Length
(mm)
Number
of teeth
Length
(mm)
31
36
44
52
248
288
352
416
57
60
68
76
456
480
544
608
* Length correction factors and permissible power output data
available on request; may necessitate longer delivery times and
minimum purchase quantities.
Number
of teeth
Pitch ø
(mm)
Outer ø
(mm)
Number
of teeth
Pitch ø
(mm)
Outer ø
(mm)
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
56.02
58.57
61.12
63.66
66.21
68.75
71.30
73.85
76.39
78.94
81.49
84.03
86.58
89.13
91.67
94.22
96.77
99.31
101.86
104.41
106.95
109.50
112.05
114.59
117.14
119.68
122.23
124.78
127.32
129.87
132.42
134.96
137.51
140.06
142.60
145.15
147.70
150.24
152.79
155.33
157.88
160.43
162.97
165.52
168.07
170.61
173.16
175.71
178.25
180.80
54.42
56.97
59.52
62.06
64.61
67.15
69.70
72.25
74.79
77.34
79.89
82.43
84.98
87.53
90.07
92.62
95.17
97.71
100.26
102.81
105.35
107.90
110.44
112.99
115.54
118.08
120.63
123.18
125.72
128.27
130.82
133.36
135.91
138.46
141.00
143.55
146.10
148.64
151.19
153.74
156.28
158.83
161.37
163.92
166.47
169.01
171.56
174.11
176.65
179.20
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
183.35
185.89
188.44
190.99
193.53
196.08
198.62
201.17
203.72
206.26
208.81
211.36
213.90
216.45
219.00
221.54
224.09
226.64
229.18
231.73
234.28
236.82
239.37
241.92
244.46
247.01
249.55
252.10
254.65
257.19
259.74
262.29
264.83
267.38
269.93
272.47
275.02
277.57
280.11
282.66
285.21
287.75
290.30
292.85
295.39
297.94
300.48
303.03
305.58
181.75
184.29
186.84
189.39
191.93
194.48
197.03
199.57
202.12
204.66
207.21
209.76
212.30
214.85
217.40
219.94
222.49
225.04
227.58
230.13
232.68
235.22
237.77
240.32
242.86
245.41
247.95
250.50
253.05
255.59
258.14
260.69
263.23
265.78
268.33
270.87
273.42
275.97
278.51
281.06
283.61
286.15
288.70
291.24
293.79
296.36
298.88
301.43
303.98
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 20
Timing belt pitch PC – 14MGT and PC – 14MGT Carbon
Calculation of the dimensions and design of belt drive units can be
based on the motor side (motor power output) and on the load
side (load collectives). Both calculations – depending on the existing safety factors, desired service life or any load-side efficiency
losses – can result in designs for drive systems with different over-
all widths. In addition to the load value calculation, therefore,
we also recommend that you use the following power output
table to compare the actual tangential loads with the maximum
permissible loads.
Maximum permissible tangential loads
The values listed in the following tables represent the operationally useable tangential loads. The listed values apply to quasistatic loads, i.e. for low speed ranges (n ≤ 100 rpm) with the use of
timing belt pulleys with at least 34 teeth.
The initial tensions for mounting of the belts are already included
in the power output values and do not have to be subtracted from
the listed values.
PolyChain® GT2
PolyChain® GT Carbon™
Belt width
Fzul
(mm)
(N)
37
11289
68
20747
90
27460
125
38138
Belt width
Fzul
(mm)
(N)
37
13829
68
25416
90
33639
125
46720
Power output in kW / 20 mm belt width
Note: The following power output data was obtained in extensive series of tests on the basis of defined service life values and
includes safety factors that were defined internally beforehand
to achieve the corresponding service life. Therefore, the power
­ utput data cannot be compared directly with data of other
o
manufacturers; if you have any questions, please contact our
­application engineers.
Poly Chain® GT2
Power output of the small timing belt pulley
Speed of the
small pulley
28
124.78
10
20
40
80
100
200
300
400
500
600
700
730
800
900
1,000
1,200
1,400
1,460
1,600
1,800
2,000
2,400
2,800
2,880
3,200
3,500
4,000
0.72
1.10
1.80
3.05
3.64
6.40
8.95
11.36
13.68
15.92
18.09
18.73
20.21
22.27
24.30
28.23
32.02
33.13
35.68
39.24
42.70
49.33
55.60
56.82
61.55
65.79
72.48
30
133.69
0.77
1.19
1.95
3.32
3.97
6.99
9.78
12.44
14.98
17.45
19.84
20.55
22.17
24.45
26.68
31.02
35.21
36.43
39.26
43.19
47.01
54.33
61.26
62.61
67.82
72.50
79.84
32
142.60
0.83
1.29
2.10
3.59
4.30
7.57
10.62
13.50
16.28
18.97
21.58
22.35
24.12
26.61
29.05
33.79
38.37
39.71
42.80
47.10
51.27
59.28
66.84
68.31
73.99
79.08
87.04
34
151.52
0.89
1.38
2.26
3.86
4.62
8.16
11.44
14.56
17.57
20.48
23.30
24.14
26.06
28.76
31.40
36.54
41.50
42.96
46.30
50.97
55.49
64.16
72.35
73.93
80.06
85.54
94.08
36
160.43
0.95
1.47
2.41
4.13
4.94
8.74
12.26
15.62
18.85
21.98
25.02
25.92
27.99
30.89
33.73
39.26
44.61
46.18
49.78
54.80
59.67
68.98
77.77
79.46
86.02
91.87
100.95
Number of teeth
38
40
44
Pitch diameter
169.34
178.25
196.08
1.00
1.56
2.56
4.39
5.26
9.31
13.08
16.67
20.12
23.47
26.72
27.68
29.90
33.01
36.05
41.97
47.69
49.37
53.22
58.59
63.80
73.75
83.11
84.91
91.88
98.08
1.06
1.65
2.71
4.66
5.58
9.88
13.89
17.71
21.39
24.95
28.41
29.44
31.80
35.11
38.35
44.66
50.75
52.53
56.64
62.35
67.89
78.45
88.37
90.28
97.64
104.16
1.17
1.83
3.02
5.18
6.21
11.02
15.51
19.78
23.90
27.89
31.77
32.92
35.56
39.27
42.91
49.97
56.79
58.79
63.38
69.76
75.94
87.69
98.66
100.76
108.83
Max. power output = (Table output + additional output) x length factor x width factor
Design information on page 23
48
213.90
1.29
2.01
3.32
5.71
6.84
12.15
17.11
21.83
26.38
30.79
35.09
36.36
39.29
43.39
47.41
55.22
62.74
64.95
70.01
77.04
83.83
96.70
108.63
110.90
50
222.82
1.34
2.10
3.46
5.97
7.15
12.71
17.90
22.85
27.61
32.24
36.74
38.07
41.13
45.43
49.64
57.81
65.69
68.00
73.29
80.63
87.71
101.11
113.49
56
249.55
1.51
2.36
3.91
6.74
8.08
14.38
20.26
25.87
31.28
36.53
41.63
43.14
46.61
51.48
56.25
65.50
74.39
77.00
82.96
91.20
99.12
114.00
60
267.38
1.62
2.54
4.20
7.25
8.70
15.49
21.83
27.87
33.70
39.35
44.86
46.48
50.22
55.46
60.60
70.54
80.09
82.88
89.27
98.08
106.52
64
285.21
1.73
2.71
4.50
7.76
9.31
16.58
23.38
29.86
36.10
42.16
48.05
49.79
53.80
59.41
64.90
75.52
85.71
88.69
95.48
104.83
113.76
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 21
Poly Chain® Carbon™
Speed of the
small pulley
10
20
40
60
100
200
300
400
500
600
700
800
900
1,000
1,200
1,400
1,600
1,800
2,000
2,400
2,800
3,200
3,500
4,000
28
30
32
34
36
124.78 133.69 142.60 151.52 160.43
0.88
0.94
1.01
1.08
1.15
1.37
1.48
1.59
1.70
1.81
2.28
2.47
2.65
2.84
3.03
3.13
3.39
3.65
3.91
4.17
4.73
5.13
5.53
5.93
6.32
8.45
9.18
9.90 10.62 11.34
11.93 12.97 14.00 15.02 16.04
15.26 16.59 17.92 19.24 20.56
18.47 20.10 21.72 23.32 24.92
21.59 23.51 25.41 27.29 29.17
24.65 26.84 29.01 31.17 33.32
27.63 30.10 32.54 34.98 37.39
30.56 33.30 36.01 38.71 41.39
33.44 36.44 39.42 42.37 45.31
39.06 42.58 46.07 49.54 52.98
44.53 48.55 52.55 56.51 60.44
49.85 54.37 58.85 63.29 67.70
55.05 60.05 65.01 69.92 74.78
60.13 65.60 71.02 76.38 81.70
69.97 76.35 82.65 88.88 95.05
79.41 86.64 93.78 100.83 107.78
88.47 96.51 104.43 112.23 119.92
95.02 103.64 112.11 120.43 128.62
105.49 114.99 124.30 133.43 142.36
Power output of the small timing belt pulley
Number of teeth
38
40
44
48
50
56
Pitch diameter
169.34 178.25 196.08 213.90 222.82 249.55
1.22
1.29
1.42
1.56
1.62
1.82
1.92
2.03
2.25
2.46
2.57
2.89
3.21
3.40
3.76
4.13
4.31
4.85
4.42
4.68
5.19
5.69
5.94
6.69
6.72
7.11
7.88
8.66
9.04 10.19
12.05 12.76 14.17 15.57 16.26 18.34
17.06 18.07 20.08 22.07 23.06 26.00
21.86 23.16 25.75 28.31 29.58 33.36
26.51 28.09 31.23 34.35 35.89 40.49
31.04 32.89 36.58 40.23 42.04 47.43
35.46 37.59 41.80 45.98 48.05 54.21
39.79 42.18 46.92 51.61 53.94 60.85
44.05 46.70 51.94 57.14 59.71 67.36
48.23 51.13 56.88 62.57 65.39 73.76
56.40 59.80 66.52 73.17 76.46 86.22
64.34 68.22 75.88 83.45 87.19 98.28
72.07 76.41 84.98 93.43 97.61 109.96
79.61 84.39 93.84 103.13 107.72 121.27
86.96 92.18 102.46 112.57 117.55 132.21
101.14 107.17 119.03 130.62 136.32 153.00
114.65 121.42 134.70 147.61 153.92
127.48 134.93 149.45
136.66 144.56
151.10
60
64
72
75
80
267.38
1.96
3.10
5.21
7.19
10.94
19.71
27.95
35.87
43.53
50.99
58.28
65.41
72.40
79.27
92.64
105.55
118.04
130.11
141.76
285.21
2.09
3.32
5.56
7.68
11.70
21.07
29.89
38.35
46.55
54.52
62.31
69.93
77.40
84.73
98.98
112.73
126.00
138.80
151.12
320.86
2.35
3.74
6.27
8.66
13.20
23.77
33.72
43.27
52.52
61.51
70.28
78.86
87.26
95.49
111.46
126.82
141.58
155.73
334.23
2.45
3.89
6.54
9.03
13.75
24.78
35.15
45.10
54.74
64.10
73.24
82.17
90.91
99.47
116.07
132.01
147.30
356.51
2.62
4.16
6.98
9.63
14.68
26.44
37.52
48.14
58.41
68.40
78.14
87.65
96.95
106.05
123.67
140.55
156.68
Max. power output = (Table output + additional output) x length factor x width factor
Design information on page 23
Additional power output [kW] for step-down ratio
Poly Chain® GT2
Speed of
the small
pulley
200
300
400
500
600
700
730
800
900
1,000
1,200
1,400
1,460
1,600
1,800
2,000
2,400
2,800
2,880
3,200
3,500
4,000
Additional power output [kW] for step-down ratio
Poly Chain® CarbonTM
1
to
1.04
1.05
to
1.11
1.12
to
1.19
1.2
to
1.3
1.31
to
1.45
1.46
to
1.65
1.66
to
1.99
2
to
2.63
2.64
to
4.47
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.07
0.11
0.15
0.18
0.22
0.26
0.27
0.29
0.33
0.37
0.44
0.51
0.54
0.59
0.66
0.74
0.88
1.03
1.06
1.18
1.29
1.47
0.15
0.22
0.29
0.37
0.44
0.52
0.54
0.59
0.66
0.74
0.88
1.03
1.07
1.18
1.32
1.47
1.77
2.06
2.12
2.36
2.58
2.94
0.22
0.33
0.44
0.55
0.66
0.77
0.81
0.88
0.99
1.10
1.32
1.54
1.61
1.77
1.99
2.21
2.65
3.09
3.18
3.53
3.86
4.41
0.29
0.44
0.59
0.74
0.88
1.03
1.07
1.18
1.32
1.47
1.76
2.06
2.15
2.35
2.65
2.94
3.53
4.12
4.24
4.71
5.15
5.88
0.37
0.55
0.74
0.92
1.10
1.29
1.34
1.47
1.65
1.84
2.21
2.57
2.68
2.94
3.31
3.68
4.41
5.15
5.30
5.88
6.44
7.35
0.44 0.51 0.59
0.66 0.77 0.88
0.88 1.03 1.18
1.10 1.29 1.47
1.32 1.54 1.76
1.54 1.80 2.06
1.61 1.88 2.15
1.77 2.06 2.35
1.99 2.32 2.65
2.21 2.57 2.94
2.65 3.09 3.53
3.09 3.60 4.12
3.22 3.76 4.29
3.53 4.12 4.71
3.97 4.63 5.29
4.41 5.15 5.88
5.30 6.18 7.06
6.18 7.21 8.24
6.35 7.41 8.47
7.06 8.24 9.41
7.72 9.01 10.30
8.83 10.30 11.77
Speed of
the small
pulley
20
40
60
100
200
300
400
500
600
700
800
900
1,000
1,200
1,400
1,600
1,800
2,000
2,400
2,800
3,200
3,500
4,000
1 1.03 1.10 1.19 1.30 1.45 1.67 2.02
to
to
to
to
to
to
to
to
1.03 1.10 1.19 1.30 1.45 1.67 2.02 2.69
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.02
0.02
0.04
0.08
0.11
0.15
0.19
0.23
0.27
0.30
0.34
0.38
0.45
0.53
0.61
0.68
0.76
0.91
1.06
1.21
1.33
1.51
0.02
0.03
0.05
0.08
0.15
0.23
0.30
0.38
0.45
0.53
0.61
0.68
0.76
0.91
1.06
1.21
1.36
1.51
1.82
2.12
2.42
2.65
3.03
0.02
0.05
0.07
0.11
0.23
0.34
0.45
0.57
0.68
0.79
0.91
1.02
1.13
1.36
1.59
1.82
2.04
2.27
2.72
3.18
3.63
3.97
4.54
0.03
0.06
0.09
0.15
0.30
0.45
0.61
0.76
0.91
1.06
1.21
1.36
1.51
1.82
2.12
2.42
2.72
3.03
3.63
4.24
4.84
5.30
6.06
0.04
0.08
0.11
0.19
0.38
0.57
0.76
0.95
1.14
1.32
1.51
1.70
1.89
2.27
2.65
3.03
3.41
3.78
4.54
5.30
6.06
6.62
7.57
2.69 4.64
and
to
4.64 above
0.05 0.05 0.06 0.07
0.09 0.11 0.12 0.14
0.14 0.16 0.18 0.20
0.23 0.26 0.30 0.34
0.45 0.53 0.61 0.68
0.68 0.79 0.91 1.02
0.91 1.06 1.21 1.36
1.13 1.32 1.51 1.70
1.36 1.59 1.82 2.04
1.59 1.85 2.12 2.38
1.82 2.12 2.42 2.72
2.04 2.38 2.72 3.06
2.27 2.65 3.03 3.41
2.72 3.18 3.63 4.09
3.18 3.71 4.24 4.77
3.63 4.24 4.84 5.45
4.09 4.77 5.45 6.13
4.54 5.30 6.05 6.81
5.45 6.36 7.26 8.17
6.36 7.42 8.48 9.53
7.26 8.48 9.69 10.90
7.94 9.27 10.59 11.92
9.08 10.59 12.11 13.62
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 22
Standard lengths and length correction factors S6
Standard widths 37, 68, 90, 125 mm
Timing belt pulley diameter
Pitch length (mm)
Length correction factor
Number of teeth
994
1,120
1,190
1,260
1,400
1,568
1,610
1,750
1,890
1,960
2,100
2,240
2,310
2,380
2,450
2,520
2,590
2,660
2,800
3,136
3,304
3,360
3,500
3,850
3,920
4,326
4,410
0.68
0.73
0.75
0.77
0.81
0.85
0.86
0.89
0.92
0.94
0.96
0.99
1.00
1.01
1.02
1.03
1.04
1.05
1.07
1.12
1.14
1.14
1.16
1.19
1.20
1.24
1.25
71
80
85
90
100
112
115
125
133
140
150
160
165
170
175
180
185
190
200
224
236
240
250
275
280
309
315
Custom widths available on request.
Width factor S7
Belt width
Width factor
37
1.85
68
3.40
90
4.50
125
6.25
Number
of teeth
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Pitch ø
(mm)
124.78
129.23
133.69
138.15
142.60
147.06
151.52
155.97
160.43
164.88
169.34
173.80
178.25
182.71
187.17
191.62
196.08
200.54
204.99
209.45
213.90
218.36
222.82
227.27
231.73
236.19
240.64
245.10
249.55
254.01
258.47
262.92
267.38
271.84
276.29
280.75
285.21
289.66
294.12
298.57
303.03
307.49
311.94
316.40
320.86
325.31
329.97
Outer ø
(mm)
121.98
126.43
130.89
135.35
139.80
144.26
148.72
153.17
157.63
162.09
166.54
171.00
175.45
179.91
184.37
188.82
193.28
197.74
202.19
206.65
211.11
215.56
220.02
224.47
228.93
233.39
237.84
242.30
246.76
251.21
255.67
260.12
264.58
269.04
273.49
277.95
282.41
286.86
291.32
295.78
300.23
304.69
309.14
313.60
318.06
322.51
326.97
Number
of teeth
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
Pitch ø
(mm)
334.23
338.68
343.14
347.59
352.05
356.51
360.96
365.42
369.88
374.33
378.79
383.25
387.70
392.16
396.61
401.07
405.53
409.98
414.44
418.90
423.35
427.81
432.26
436.72
441.17
445.63
450.09
454.55
459.00
463.46
467.92
472.37
476.83
481.28
485.74
490.20
494.65
499.11
503.57
508.02
512.48
516.94
521.39
525.85
530.30
534.76
Outer ø
(mm)
331.43
335.88
340.34
344.80
349.25
353.71
358.16
362.62
367.08
371.53
375.99
380.45
384.90
389.36
393.82
398.27
402.73
407.18
411.64
416.10
420.55
425.01
429.47
433.92
438.37
442.83
447.29
451.75
456.20
460.66
465.12
469.57
474.03
478.49
482.94
487.40
491.85
496.31
500.77
505.22
509.68
514.14
518.59
523.05
527.51
531.96
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 23
Calculation & formulas
Calculation
General
The basis for determining the timing belt dimensions is a calculation method that takes the following influences into account:
* Power
* Torques
* Speed
* Duty cycle of the drive system
* Operating characteristics
* Number of meshing teeth
* Transmission ratio
* Centre distance of axes
All data concerning the transmitted torque, the speed and the
length of a PolyChain® timing belt relates to the pitch line, which
is assumed to be centre of the tensile member. The pitch line is
precisely defined and is identical to the pitch diameter on the timing belt pulley. Half the difference in diameter between the pitch
diameter and outer diameter is equal to the size of the belt tooth
root to the centre of the tensile body.
Project data sheet
During the design and the later dimensioning of a drive system,
you should remember that optimum use of the transmission
capacity, long service life and high efficiency are possible only if
the actual operating conditions are known, so that critical conditions can already be taken into account during the design stage.
The project data sheet on page 44 is provided to help you with
this task.
Preliminary selection
Use the diagram on page 5 to make a preliminary selection of the
suitable belt pitch.
Belt width
Taking into account the inherent load of the timing belt, it is
always a good idea to select a belt width that is smaller than the
diameter of the smallest timing belt pulley. A wider timing belt, if
mounted incorrectly, is more likely to cause varying edge tensions,
which can prevent optimum running of the belt. In borderline
cases, it is often better to select a larger pitch instead of a wider
belt. If this is not possible, we recommend a belt pitch in 2 parallel running belt segments (of the same length), to reduce the
transverse rigidity of the belt in combination with the small pulley
diameters.
Pulley diameter
Use pulleys with the largest diameters possible! This makes optimal use of the power output range of the belt at high peripheral
speeds. Pulleys with larger diameters have less bending stress and
the belt does not have to be as wide.
Safety factors
The table on page 25 shows load factors that include the drive
characteristics of various machine types as an increased safety
factor.
In addition to these safety factors, it can be extremely important
to include starting and stopping processes together with the corresponding mass effects of the respective drive system as a design
criterion for the safety considerations. Especially during stopping
or locking processes, mass effect can cause inertia forces that are
far above the maximum permissible tangential loads of the belts
listed in the power output tables (pages 17 and 20).
The use of suitable regulators (e.g. a soft start ramp controller for
starting and stopping) or the use of suitable overload protection
can greatly reduce the mass effect to optimize fail-safe operation.
Abbreviations
α
Temperature expansion coefficient
a
Acceleration
A
Centre distance of axes
b
Braking deceleration
bR
Belt width
B
Pulley width
BW
Flexural fatigue
Cspez Specific spring constant
dB
Bore diameter
da
Outer diameter
dw
Pitch diameter
dwk
Pitch diameter of small pulley
dwg
Pitch diameter of large pulley
e
Stretching
Fa
Acceleration force
Fb
Braking force
FB
Driving force, calculated
FH
Lifting force
FP
Test load for belt tension
FR
Friction force
Ft
Span tension
FU
Tangential load
FV
Initial tension
Fzul
Maximum permissible tangential load
g
Acceleration of gravity
hS
Belt thickness
ht
Tooth height
i
Transmission ratio
lw
Pitch length
lt
Taut side
M
Torque
m
Mass
mL
Mass of load
mR
Mass of belt
mges Total weight
mZ
Mass of timing belt pulley
mZ, red Reduced mass of timing belt pulley
n
Speed
nMOT Motor speed
P
Power output
PB
Calculated power output
PN
Rated power output
SBruch Security against fracture
SG
Total application factor
S1
Load factor
S2
Tooth mesh factor
S3
Transmission allowance
S4
Bending factor
S5
Special application factor
S6
Belt length factor
S7
Belt width factor
t
Pitch
v
Speed
z
Number of belt pulleys
ze
Number of meshing teeth
zg
Number of teeth, large pulley
zk
Number of teeth, small pulley
1/K
m/s2
mm
m/s2
mm
mm
1/s
N
mm
mm
mm
mm
mm
%
N
N
N
N
N
N
N
N
N
N
m/s2
mm
mm
mm
mm
Nm
kg
kg
kg
kg
kg
kg
l/min
l/min
kW
kW
kW
m/s
(The formula collection applies to all timing belt catalogs;
­therefore, it is possible that not all abbreviations occur in
this catalog).
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 24
Formulas
Torque
M=
Lifting force
P · 9.55 · 103 = FU · dW
n
2 · 103
FH = m · g [N]
[Nm]
Friction force
Power output
M·n
=
P=
9.55 · 103
FR = m · g · µ [N]
FU · v
[kW]
103
Mass
m = mL + mR + mZred [kg]
with mR = IW · mG
Tangential load
P · 103 =
v
FU =
M · 2 · 103
dw
[N]
Reduced mass of timing belt pulley
mZred =
Speed
mZ
2
· ( 1 + dB2
) [kg]
da2
3
n = 19.1 · 10 · v [min-1]
dw
Mass of timing belt pulley
mZ =
Peripheral speed
v=
dw · n
19.1 · 103
m
s
(da2 – dB2) · p · B · V
[kg]
4 · 106
V = density
Acceleration force
Stretching
Fa = m · a [N]
e = DI · 100 [%]
It
Braking force
Flexural fatigue
Fb = m · b [N]
3
Bw = v · z · 10 [1/s]
Iw
ta : startup time
n, v
Sa : startup path
n, v = const.
. .
.
v = d0 π n = d0 n
60
19,1
startup
v
ta = a
v2
sa = 2 . a
tb : braking time
Sb : braking path
braking
s
t= v
s = v. t
tges = ta + t + tb
t, s
sges = sa + s + sb
Motion equations for acceleration and stopping processes
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 25
Load factor S1
The load factor S1 is found in the intersecting point of the
previously classified driven machine (row) and in the machine
class of the driven machine in question, taking into account the
duty cycle (column).
Driven machines
For machines not listed, select a safety factor that most nearly
corresponds to one of the listed groups.
Class
The different types of driven machines
Drive
AC and three-phase motors, normal
starting torque, e.g. with short circuit
rotor motors, compound DC motors,
internal combustion engines with more
than 4 cylinders
AC and three-phase motors, high
starting torque, e.g. single-phase and
synchronous motors, three-phase
braking motors, hydraulic motors,
internal combustion engines with up to
4 cylinders
short-term
operation
short-term
operation
3 – 8 hours
daily
normal
operation
continuous
operation
8 – 16 hours 16 – 24 hours
daily
daily
3 – 8 hours
daily
normal
operation
continuous
operation
8 – 16 hours 16 – 24 hours
daily
daily
1
filling systems, measuring devices, medical
instruments
1.0
1.2
1.4
1.2
1.4
1.6
2
floor cleaning equipment, sewing machines,
office machines, light-duty woodworking
machines, band saws, drills and lathes
1.1
1.3
1.5
1.3
1.5
1.7
3
conveyor systems for small packages, wood slats,
presses, lathes, washing machines, heavy-duty
woodworking machines, sawing machines
1.2
1.4
1.6
1.6
1.8
2.0
4
stirring machines for viscous liquids, dough
mixers, conveyor belts: coal, sand, ore, shaft
drives, drills, lathes, screwdrivers, peeling
machines, grinding machines, circular saws,
planing machines, paper machines (except
masticators) pressing-embossing machines,
shears, printing presses, centrifugal pumps and
compressors, vibration machines
1.3
1.5
1.7
1.6
1.8
2.0
5
tile-moulding machines, conveyor belts, fans,
generators, centrifugal blowers, elevators / lifting
gear, extruders
1.4
1.6
1.8
1.8
2.0
2.2
6
brick and clay machines, conveyor systems:
flat and bucket lifts/worm screws, centrifuges,
hammer mills, paper machines, textile machines
1.5
1.7
1.9
1.9
2.1
2.3
7
pulverising machines, ventilators for mines
1.6
1.8
2.0
2.0
2.2
2.4
8
piston compressors, mills: ball mill, rubble mill
and sawmill equipment, piston pumps
1.7
1.9
2.1
2.1
2.3
2.5
The listed safety factors can be used as reference values for numerous applications, but they cannot replace a detailed technical assessment of the particular application.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 26
Calculation method
To select a suitable PolyChain® GT2 timing belt drive system, you
need the following data:
1. Power output and type of drive machine and driven machine
2. Operation time
3. Speed of drive machine and driven machine
4. Centre distance of axes of the drive system
Step 1:
Determine the calculated power output
A. To determine the calculated power output, firs you have to define the load factor S1 of the drive from the table on page 25.
B. Multiply this load factor times the input power. The result is the
calculated power output required for defining the belt drive.
PB = PN · S1
Step 2:
Select the timing belt pitch
A. Enter the calculated power output in the “Selection diagram for
belt pitch” (page 5) on the horizontal axis. Use the speed of the
faster shaft (or of the small timing belt pulley) for the vertical
axis.
B. The timing belt belt pitch for further calculations can be found
at the point where the two factors intersect. If the point of
intersection is near the separation between 8 mm and 14 mm
pitch, it is recommended to calculate the drive system for both
pitches and to use the drive system that is best suited for your
application.
Step 3:
Select the timing belt width
For all transmission and reduction drive systems
A. The power output tables on pages 17 and 20 contain the values
for the smallest standard belt width. A different width factor has
to be used for larger belt widths. The column on the left side of
the power output table contains the speed of the small timing
belt pulley; the line above the table contains the number of
teeth of the timing belt pulley and its pitch diameter. The power
output of the timing belt can be found at the point where the
pulley speed and the number of pulley teeth intersect.
B. Select a belt width and determine the corresponding power
output. Multiply this power output value times the timing belt
length correction factor S6 , which can be found in the table under the power output table* to determine the corrected power
output.
PKORR = PTAB, S.17ff. · S6 · S7
* Factors S6 and S7 are explained on pages 19 and 22.
If the corrected power output is equal to or greater than the calculated power output, this belt width can be used. If not, repeat this
step with the next larger timing belt width. If the largest belt width
does not produce satisfactory results, you should use a larger timing belt pulley or, if possible, a larger pitch.
PKORR > PB · S2
Note:
Depending on the degree of acceleration and braking torque and
the frequency of reversal of motion, the timing belt pulley diameter
should be as large as possible with a minimum of 12 meshing teeth.
If the number of meshing teeth is less than 6, this has to be compensated for with the correction factor S2 in the drive calculation.
Tooth mesh factor S2
Number of meshing teeth
5
1.25
S2
4
1.66
3
2.5
2
5.0
Number of meshing teeth Ze on the small pulley:
Z
d –d
Ze = k
3 – wg wk
6
A
[
]
C. I f the calculation results in several possible combinations
of timing belt pulleys, you should observe the following
principles:
a. A
larger timing belt pulley diameter requires a smaller timing
belt width.
b. T he belt width should not be greater than the diameter
of the smallest timing belt pulley.
c. L arge timing belt pulley diameters reduce wear on the bearings
and shaft.
Step 4:
Installation and belt tension
Due to the low stretching tendency of the tensile member,
­PolyChain® GT2 belts generally require no re-tightening. Adjustments must be made during installation of the belts to compensate for production tolerances and to set a specified initial tension.
The recommended radial settings of the centre distance of axes
are listed on page 14.
Step 5:
Calculation of initial belt tension
The initial required tension is calculated based on the equations
on page 13.
Step 6:
Select the drive components
Based on the calculated drive system data and geometries, you can
select a suitable drive component combination from the standard
line of pulleys. In special cases, it may be necessary to manufacture
custom pulleys according to your drawing specifications.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 27
Sample calculation
Drive data
Drive:
Three-phase motor, high starting torque P = 5 kW at
n1 = 1750 min-1
Duty cycle 6 hours daily
Step-up ratio
Output:
Woodworking machine, n2 = 2150 min-1
Centre distance of axes ca. 430 mm.
Calculation steps
Results
Step 1:
Determine the calculated power output PB
A. T ype of drive machine: You will find the drive motor used in the third class
in the table on page 15.
B. Load factor from table (woodworking machines): 1,6.
C. Calculated power output = Load factor x drive power
PB
=
S1
x
PN
Load factor S1 = 1.6
Step 2:
Select the pitch
Belt pitch = 8 mm
Calculated power output = 1.6 x 5 = 8 kW
From the “Selection diagram for belt pitch” on page 5
you see that: at 8 kW and 2150 min-1 a pitch of 8 mm is recommended.
Select the combination of timing belt pulleys, timing belt length,
Calculate the centre distance of axes:
1. Calculation of the transmission ratio
i = 2150 = 1.23
1750
2. Select the number of pulley teeth
based on the required transmission i
e.g. z1 = 34; z2 = 28 i = 1.214
3. Select the timing belt length analogous to the existing pitch lengths of the
pitch 8M
i = 1.23
selected:
z1 8M - 34 S
z2 8M - 28 S
selected:
Timing belt length = 1120 mm
e.g. Iw = 1120 mm
4. Calculate the centre distance of axes with the corresponding factors
(Separate formula collection, to be provided on request)
A = 435.93 mm
Step 3:
Select the belt width
Centre distance of axes: 435.93 mm
Belt width b = 21 mm
In the power output table on page 17, for a timing belt pulley with 28 teeth
at a speed of 2,150 min-1 a power output of PTAB, z1 = PTAB · S6 · S7 = 14,8 kW
is specified for a belt width of 21 mm. This power output is higher than
the ­calculated power output PB = 8 kW, multiplied by the tooth mesh
factor (S2 = 1)
Step 4:
Installation and mounting data
According to the tables on page 14, the minimum travel of a shaft to the initial
belt tension is –2.8 mm/+0.8 mm.
Minimum travel to belt tension:
–2.8 mm / +0.8 mm
Step 5:
Calculation of initial belt tension
Deflection force = 12.6 N
Deflection = 4.4 mm
Use the equation on page 15.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 28
Standard line of timing belt pulleys
Pitch 8 mm
Poly Chain® 8M-12
All dimensions in mm
Pitch
Outer
Rim
flange
28**
28
28
32
42
56.02
63.66
71.30
76.39
81.49
54.42
62.06
69.70
74.79
79.89
60
70
75
82,5
87
–
–
–
–
–
43
49
56
60
66
10
2
2
5
5
20
20
20
20
20
–
–
–
–
–
30
22
22
25
25
–
–
–
–
–
0.42
0.43
0.60
0.67
0.77
Mass
moment of
inertia 10-4
(kgm2)
1.44
2.11
3.79
5.16
6.55
1610
1610
1610
1610
2012
42
42
42
42
50
86.58
91.67
96.77
101.86
114.59
84.98
90.07
95.17
100.26
112.99
91
97
102
106
120
–
–
–
–
–
69
76
78
85
92
5
5
5
5
12
20
20
20
20
20
–
–
–
–
–
25
25
25
25
32
–
–
–
–
–
0.88
1.02
1.15
1.19
1.76
8.27
11.06
13.52
15.38
27.16
2F*
2F*
2F*
2F*
2F*
2012
2012
2012
2012
2012
50
50
50
50
50
122.23
127.32
142.60
152.79
162.97
120.63
125.72
141.00
151.19
161.37
128
135
150
158
168
–
–
–
–
–
103
104
104
111
111
12
12
12
12
12
20
20
20
20
20
–
_
–
–
–
32
32
32
32
32
–
–
–
_
–
2.16
2.28
2.83
3.24
3.51
39.27
43.43
66.17
87.72
103.96
2*
2*
2*
2012
2012
2012
50
50
50
190.99
203.72
229.18
189.39
202.12
227.58
–
–
–
–
–
–
111
111
111
12
12
12
20
20
20
–
–
–
32
32
32
–
–
–
4.57
5.13
6.37
182.30
234.08
372.11
Timing belt
pulley designation
Number of
teeth
Timing
belt pulley type
Bush
number
Max.
bore
holes
8M-22S-12
8M-25S-12
8M-28S-12
8M-30S-12
8M-32S-12
22
25
28
30
32
1F*
2F*
2F*
2F*
2F*
VB/12
1108
1108
1210
1610
8M-34S-12
8M-36S-12
8M-38S-12
8M-40S-12
8M-45S-12
34
36
38
40
45
2F*
2F*
2F*
2F*
2F*
8M-48S-12
8M-50S-12
8M-56S-12
8M-60S-12
8M-64S-12
48
50
56
60
64
8M-75S-12
8M-80S-12
8M-90S-12
75
80
90
Diameter
A
B
E
F
K
L
M
Weight
(kg)
Poly Chain® 8M-21
All dimensions in mm
Pitch
Outer
Rim
flange
A
B
E
F
K
L
M
Weight
(kg)
28**
28
32
32
42
56.02
63.66
71.30
76.39
81.49
54.42
62.06
69.70
74.79
79.89
60
70
75
82,5
87
–
–
–
–
–
43
–
–
–
–
10
–
–
–
–
30
30
30
30
30
–
8
5
5
5
40
22
25
25
25
–
–
–
–
–
0.57
0.60
0.75
0.83
0.97
Mass
moment of
inertia 10-4
(kgm2)
1.99
2.92
4.80
6.42
8.40
1610
1610
1610
1610
2012
42
42
42
42
50
86.58
91.67
96.77
101.86
114.59
84.89
90.07
95.17
100.26
112.99
91
97
102
106
120
–
–
–
–
–
–
–
–
–
92
–
–
–
–
2
30
30
30
30
30
5
5
5
5
–
25
25
25
25
32
–
–
–
–
–
1.12
1.29
1.34
1.50
2.03
10.83
13.99
16.02
19.74
32.88
2F*
2F*
2F*
2F*
2F*
2012
2012
2012
2517
2517
50
50
50
60
60
122.23
127.32
142.60
152.79
162.97
120.63
125.72
141.00
151.19
161.37
128
135
150
158
168
–
–
–
–
–
103
104
111
124
124
2
2
2
15
15
30
30
30
30
30
–
–
–
–
–
32
32
32
45
45
–
–
–
–
–
2.24
2.42
3.20.
4.66
5.28
42.90
49.20
80.30
127.25
158.77
75
80
90
2*
2*
9*
2517
2517
2517
60
60
60
190.99
203.72
229.18
189.39
202.12
227.58
–
–
–
–
–
198
124
124
124
15
15
–
30
30
30
–
–
7.5
45
45
45
–
–
7.5
6.77
7.61
8.57
276.69
353.26
499.05
112
140
9*
10*
2517
3020
60
75
285.21
356.51
283.61
354.91
–
–
253
324
124
150
–
–
30
30
7.5
7.5
45
51
7.5
10.5
12.50
12.79
1155.88
1699.74
Timing belt
pulley designation
Number of
teeth
Timing
belt pulley type
Bush
number
Max.
bore
holes
8M-22S-21
8M-25S-21
8M-28S-21
8M-30S-21
8M-32S-21
22
25
28
30
32
1F*
1F*
3F*
3F*
3F*
VB/12
1108
1210
1210
1610
8M-34S-21
8M-36S-21
8M-38S-21
8M-40S-21
8M-45S-21
34
36
38
40
45
3F*
3F*
3F*
3F*
2F*
8M-48S-21
8M-50S-21
8M-56S-21
8M-60S-21
8M-64S-21
48
50
56
60
64
8M-75S-21
8M-90S-21
8M-80S-21
8M-112S-21
8M-140S-21
Diameter
*
Illustrations of the types of timing belt pulley can be found on page 32.
**
DIN 6885 T3
VB/12 = pre-bore (min. diameter 12 mm)
Comment: The timing belt pulleys are available in grey cast iron or
steel. Both types provide the required durability and reliability. We
reserve the right to deliver standard pulleys in either version.
In case of peripheral speeds higher than 40 m/s, please contact our
application engineers.
In some cases, the use of standard pulleys – depending on the
bore diameter and loads – can exceed the slipping torques of the
Taper Lock® clamping bushes. At higher torque loads, therefore,
compliance with the maximum permissible values should be
ensured.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 29
Poly Chain® 8M-36
Timing belt
pulley designation
Number of
teeth
All dimensions in mm
Timing
belt pulley type
Bush
number
Max.
bore
holes
Diameter
Pitch
Outer
Rim
flange
A
B
E
F
K
L
M
Weight
(kg)
Mass
moment of
inertia 10-4
(kgm2)
4.65
6.92
9.26
12.37
15.77
8M-25S-36
8M-28S-36
8M-30S-36
8M-32S-36
8M-34S-36
25
28
30
32
34
1F*
3F*
3F*
3F*
3F*
VB/12
1210
1610
1610
1610
32
32
42
42
42
63.66
71.30
76.39
81.49
86.58
62.06
69.70
74.79
79.89
84.98
70
75
82,5
87
91
–
–
–
–
–
49
–
–
–
–
10
–
–
–
–
45
45
45
45
45
–
–
–
–
–
55
–
–
–
–
–
–
–
–
–
1.02
1.11
1.22
1.45
1.66
8M-36S-36
8M-38S-36
8M-40S-36
8M-45S-36
8M-48S-36
36
38
40
45
48
3F*
3F*
3F*
3F*
3F*
1610
1610
2012
2012
2012
42
42
50
50
50
91.67
96.77
101.86
114.59
122.23
90.07
95.17
100.26
112.99
120.63
97
102
106
120
128
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
45
45
45
45
45
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1.90
2.21
2.36
3.07
3.30
20.28
26.28
31.19
50.17
62.31
8M-50S-36
8M-56S-36
8M-60S-36
8M-64S-36
8M-75S-36
50
56
60
64
75
3F*
3F*
3F*
3F*
2*
2012
2517
2517
2517
3020
50
60
60
60
75
127.32
142.60
152.79
162.97
190.99
125.72
141.00
151.19
161.37
189.39
135
150
158
168
–
–
–
–
–
–
–
–
–
–
150
–
–
–
–
6
45
45
45
45
45
–
–
–
–
–
–
–
–
–
51
–
–
–
–
–
3.58
4.48
5.30
6.19
8.72
72.25
115.19
157.20
191.32
392.22
8M-80S-36
8M-90S-36
8M-112S-36
8M-140S-36
8M-168S-36
8M-192S-36
80
90
112
140
168
192
2*
9*
9*
10*
10*
10*
3020
3020
3020
3020
3525
3525
75
75
75
75
100
100
203.72
229.18
285.21
356.51
427.81
488.92
202.12
227.58
283.61
354.91
426.21
487.32
–
–
–
–
–
–
–
197
253
324
396
457
150
150
150
150
198
198
6
–
–
–
–
–
45
45
45
45
45
45
–
3
3
3
10
10
51
51
51
51
65
65
–
3
3
3
10
10
9.96
10.41
14.01
11.98
23.91
26.53
505.75
636.42
1326.76
1747.45
4693.42
7055.91
All dimensions in mm
Poly Chain® 8M-62
8M-30S-62
8M-32S-62
8M-34S-62
8M-36S-62
8M-38S-62
30
32
34
36
38
1F*
1F*
1F*
1F*
1F*
VB/20
VB/20
VB/20
VB/20
VB/20
42
50**
55**
60**
60
76.39
81.49
86.58
91.67
96.77
74.79
79.89
84.98
90.07
95.17
82,5
87
91
97
102
–
–
–
–
–
63
68
69
76
78
12
12
12
12
12
72
72
72
72
72
–
–
–
–
–
84
84
84
84
84
–
–
–
–
–
2.45
2.82
3.17
3.52
3.91
Mass
moment of
inertia 10-4
(kgm2)
16.25
21.31
28.47
34.89
44.51
8M-40S-62
8M-45S-62
8M-48S-62
8M-50S-62
8M-56S-62
40
45
48
50
56
3F*
3F*
3F*
3F*
6F*
2012
2012
2517
2517
2517
50
50
60
60
60
101.86
114.59
122.23
127.32
142.60
100.26
112.99
120.63
125.72
141.00
106
120
128
135
150
–
–
–
–
111
–
–
–
–
-
–
–
–
–
–
72
72
72
72
72
–
–
–
–
13.5
–
–
–
–
45
–
–
–
–
13.5
3.76
4.88
5.52
6.03
5.43
49.43
79.37
105.81
123.91
152.66
8M-60S-62
8M-64S-62
8M-75S-62
8M-80S-62
8M-90S-62
60
64
75
80
90
6F*
6F*
6*
6*
6*
2517
2517
3020
3020
3020
60
60
75
75
75
152.79 151.19
162.97 161.37
190.99 189.39
203.72 202.12
229.18 227.58
121
131
159
172
197
–
–
–
–
–
–
–
–
–
–
72
72
72
72
72
13.5
13.5
10.5
10.5
10.5
45
45
51
51
51
13.5
13.5
10.5
10.5
10.5
6.33
7.11
9.99
11.44
14.94
204.79
258.10
485.34
628.73
1045.29
8M-112S-62
8M-140S-62
8M-168S-62
8M-192S-62
112
140
168
192
7*
7*
8*
8*
3020
3525
3525
3525
75
100
100
100
285.21
356.51
427.81
488.92
158
168
–
–
–
–
–
–
–
–
253
324
396
457
150
198
198
198
–
–
–
–
72
72
72
72
10.5
3.5
3.5
3.5
51
65
65
65
10.5
3.5
3.5
3.5
14.94
24.77
28.39
32.18
1540.46
3953.51
5812.58
8880.82
Timing belt
pulley designation
Number of
teeth
Timing
belt pulley type
Bush
number
Max.
bore
holes
Diameter
Pitch
Outer
Rim
flange
283.61
354.91
426.21
487.32
A
B
E
F
K
L
M
Weight
(kg)
*
Illustrations of the types of timing belt pulley can be found on page 32.
**
DIN 6885 T3
VB/12 = pre-bore (min. diameter 12 mm)
Comment: The timing belt pulleys are available in grey cast iron or
steel. Both types provide the required durability and reliability. We
reserve the right to deliver standard pulleys in either version.
In case of peripheral speeds higher than 40 m/s, please contact our
application engineers.
In some cases, the use of standard pulleys – depending on the
bore diameter and loads – can exceed the slipping torques of the
Taper Lock® clamping bushes. At higher torque loads, therefore,
compliance with the maximum permissible values should be
ensured.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 30
Pitch 14 mm
Poly Chain® 14M-37
All dimensions in mm
Pitch
Outer
Rim
flange
50
60
60
60
60
124.78
133.69
142.60
151.52
160.43
121,98
130.89
139.80
148.72
157.63
128
138
154
160
168
88
98
100
109
117
–
–
–
–
–
–
–
–
–
–
51
51
51
51
51
–
3
3
3
–
32
45
45
45
45
19
3
3
3
6
2.97
3.81
4.53
5.06
5.92
Mass
moment of
inertia 10-4
(kgm2)
62.80
84.85
116.65
142.79
172.60
2517
2517
3020
3020
3020
60
60
75
75
75
169.34
178.25
196.08
213.90
222.82
166.54
175.45
193.28
211.11
220.02
183
188
211
226
240
126
135
–
–
–
–
–
–
–
–
–
–
–
–
–
51
51
51
51
51
–
–
–
–
–
45
45
–
–
–
6
6
–
–
–
6.51
7.31
9.44
11.44
12.62
230.24
288.92
452.35
646.57
780.73
7F*
7*
7*
7*
7*
3020
3020
3020
3020
3020
75
75
75
75
75
249.55
267.38
285.21
320.86
356.51
246.76
264.58
282.41
318.06
353.71
256
–
–
–
–
207
224
242
278
314
144
159
159
159
159
–
–
–
–
–
51
51
51
51
51
0
0
0
0
0
51
51
51
51
51
0
0
0
0
0
12.70
14.23
15.58
17.24
20.32
973.88
1191.25
1489.35
2099.86
3097.72
8*
8*
10*
10*
10*
3020
3020
3525
3525
4030
75
75
100
100
115
401.07
499.11
623.89
748.66
855.61
398.27
496.31
621.09
745.87
852.82
–
–
–
–
–
360
456
581
706
812
159
159
206
206
215
–
–
–
–
–
51
51
51
51
51
0
0
7
7
12.5
51
51
65
65
76
0
0
7
7
12.5
29.85
27.43
33.55
64.50
83.82
6445.74
9264.40
15022.96
47001.90
81467.11
Timing
belt pulley
­designation
Number of
teeth
Timing
belt pulley type
Bush
number
Max.
bore
holes
14M-28S-37
14M-30S-37
14M-32S-37
14M-34S-37
14M-36S-37
28
30
32
34
36
5F*
6F*
6F*
6F*
5F*
2012
2517
2517
2517
2517
14M-38S-37
14M-40S-37
14M-44S-37
14M-48S-37
14M-50S-37
38
40
44
48
50
5F*
5F*
3F*
3F*
3F*
14M-56S-37
14M-60S-37
14M-64S-37
14M-72S-37
14M-80S-37
56
60
64
72
80
90
14M-90S-37
14M-112S-37
14M-140S-37
14M-168S-37
14M-192S-37
112
140
168
192
Diameter
A
B
E
F
K
L
M
Weight
(kg)
Poly Chain® 14M-68
Timing
belt pulley
­designation
All dimensions in mm
Diameter
Pitch
Outer
Rim
flange
100
110**
115**
125**
75
151.52
160.43
169.34
178.25
196.08
148.72
157.63
166.54
175.45
193.28
160
168
183
188
211
–
–
–
–
153
132
131
141
156
–
20
20
20
20
–
84
84
84
84
84
–
–
–
–
16.5
104
104
104
104
51
–
–
–
–
16.5
6.25
6.68
7.46
7.81
11.54
Mass
moment of
inertia 10-4
(kgm2)
234.69
273.17
359.51
430.15
604.33
3020
3525
3525
3525
3525
75
100
100
100
100
213.90
222.82
249.55
267.38
285.21
211.11
220.02
246.76
264.58
282.41
226
240
256
–
–
171
180
207
224
242
–
–
–
–
–
–
–
–
–
–
84
84
84
84
84
–
9.5
9.5
9.5
9.5
51
65
65
65
65
33
9.5
9.5
9.5
9.5
13.74
16.63
21.15
24.28
27.86
850.56
1110.47
1740.42
2250.33
2925.48
7*
7*
8*
8*
8*
3525
3525
3525
3525
3525
100
100
100
100
100
320.86
356.51
401.07
499.11
623.89
318.06
353.71
398.27
496.31
621.09
–
–
–
–
278
314
360
456
581
–
–
–
–
–
–
–
–
–
–
84
84
84
84
84
9.5
9.5
9.5
9.5
9.5
65
65
65
65
65
9.5
9.5
9.5
9.5
9.5
25.74
29.86
31.24
39.25
40.87
3353.92
4827.78
6694.20
13299.34
21569.65
8*
8*
3525
4030
100
115
748.66
855.61
745.87
852.82
–
–
706
812
–
–
–
–
84
84
9.5
4
65
76
9.5
4
73.30
94.21
58491.40
99321.99
Number of
teeth
Timing
belt pulley type
Bush
number
Max.
bore
holes
14M-34S-68
14M-36S-68
14M-38S-68
14M-40S-68
14M-44S-68
34
36
38
40
44
1F*
1F*
1F*
1F*
6F*
VB/40
VB/40
VB/40
VB/40
3020
14M-48S-68
14M-50S-68
14M-56S-68
14M-60S-68
14M-64S-68
48
50
56
60
64
5F*
6F*
6F*
6*
6*
14M-72S-68
14M-80S-68
14M-90S-68
14M-112S-68
14M-140S-68
72
80
90
112
140
14M-168S-68
14M-192S-68
168
192
A
B
E
F
K
L
M
Weight
(kg)
Illustrations of the types of timing belt pulley can be found on page 32.
*
DIN 6885 T3
**
VB/40 = pre-bore (min. diameter 12 mm)
Comment: The timing belt pulleys are available in grey cast iron or
steel. Both types provide the required durability and reliability. We
reserve the right to deliver standard pulleys in either version.
In case of peripheral speeds higher than 40 m/s, please contact our
application engineers.
In some cases, the use of standard pulleys – depending on the
bore diameter and loads – can exceed the slipping torques of the
Taper Lock® clamping bushes. At higher torque loads, therefore,
compliance with the maximum permissible values should be
ensured.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 31
Poly Chain® 14M-90
All dimensions in mm
Bush
number
Max.
bore
holes
36
38
40
44
48
Timing
belt
­pulley
type
1F*
1F*
1F*
1F*
6F*
VB/50
VB/50
VB/50
VB/50
3525
14M-50S-90
14M-56S-90
14M-60S-90
14M-64S-90
14M-72S-90
50
56
60
64
72
6F*
6F*
6*
6*
7*
14M-80S-90
14M-90S-90
14M-112S-90
14M-140S-90
14M-168S-90
80
90
112
140
168
14M-192S-90
192
Timing
belt pulley
­designation
Number of
teeth
14M-36S-90
14M-38S-90
14M-40S-90
14M-44S-90
14M-48S-90
Diameter
Pitch
Outer
Rim
flange
A
B
E
F
K
L
M
Weight
(kg)
110**
115**
125**
140**
100
160.43
169.34
178.25
196.08
213.90
157.63
166.50
175.45
193.28
211.11
168
183
188
211
226
–
–
–
–
171
131
141
156
169
–
30
30
30
30
–
106
106
106
106
106
–
–
–
–
20
136
136
136
136
66
–
–
–
–
20
8.15
9.73
10.29
11.92
16.76
Mass
moment of
inertia 10-4
(kgm2)
333.81
467.27
564.50
805.17
1069.46
3525
3525
3525
3525
3525
100
100
100
100
100
222.82
249.55
267.38
285.21
320.86
220.02
246.76
264.58
282.41
318.06
240
256
–
–
–
180
207
224
242
278
–
–
–
–
178
–
–
–
–
–
106
106
106
106
106
20
20
20
20
20
66
66
66
66
66
20
20
20
20
20
18.38
23.46
26.53
30.30
26.36
1272.88
2016.82
2558.85
3308.24
3633.18
7*
7*
8*
8*
8*
4030
4030
4535
4535
5040
115
115
125
125
130**
356.51
401.07
499.11
623.89
748.66
353.71
398.27
469.31
621.09
745.87
–
–
–
–
–
314
360
456
581
706
215
215
215
215
267
–
–
–
–
–
106
106
106
106
106
15
15
8
8
2
76
76
90
90
102
15
15
8
8
2
35.61
41.90
70.89
74.56
109.24
5650.71
7979.09
23322.89
39744.58
77064.15
8*
5040
130**
855.61
852.82
–
812
267
–
106
2
102
2
126.05
119340.31
Poly Chain® 14M-125
All dimensions in mm
Bush
number
Max.
bore
holes
38
40
44
48
50
Timing
belt
­pulley
type
1F*
1F*
1F*
1F*
6F*
VB/50
VB/50
VB/50
VB/50
3525
14M-56S-125
14M-60S-125
14M-64S-125
14M-72S-125
14M-80S-125
56
60
64
72
80
6F*
6*
6*
7*
7*
14M-90S-125
14M-112S-125
14M-140S-125
14M-168S-125
14M-192S-125
90
112
140
168
192
7*
8*
8*
8*
8*
Timing
belt pulley
­designation
Number of
teeth
14M-38S-125
14M-40S-125
14M-44S-125
14M-48S-125
14M-50S-125
Diameter
Pitch
Outer
Rim
flange
115**
125**
140**
160**
100
169.34
178.25
196.08
213.90
222.82
166.54
175.45
193.28
211.11
220.02
183
188
211
226
240
–
–
–
–
180
141
156
169
185
–
20
20
20
20
–
141
141
141
141
141
–
–
–
–
38
161
161
161
161
65
–
–
–
–
38
11.74
12.23
14.46
14.70
20.93
Mass
moment of
inertia 10-4
(kgm2)
566.16
673.08
981.64
1239.87
1527.53
3525
4030
4030
4030
4030
100
115
115
115
115
249.55
267.38
285.21
320.86
356.51
246.76
264.58
282.41
318.06
353.71
256
–
–
–
–
207
224
242
278
314
–
–
–
215
215
–
–
–
–
–
141
141
141
141
141
38
32.5
32.5
32.5
32.5
65
76
76
76
76
38
32.5
32.5
32.5
32.5
25.91
30.92
35.34
37.71
42.02
2366.65
3083.08
3979.74
5201.08
7133.19
4030
4535
4535
5040
5040
115
125
125
125
125
401.07
499.11
623.89
748.66
855.61
398.27
496.31
621.09
745.87
825.82
–
–
–
–
–
360
456
581
706
812
215
215
215
267
267
–
–
–
–
–
141
141
141
141
141
32.5
26
26
19.5
19.5
76
89
89
102
102
32.5 51.29
26
65.64
26
67.90
19.5 120.66
19.5 142.39
11031.63
22771.41
38083.37
90872.96
144192.26
A
B
E
F
K
L
M
Weight
(kg)
*
Illustrations of the types of timing belt pulley can be found on page 32.
**
DIN 6885 T3
VB/40 = pre-bore (xmin. diameter 40 mm)
Comment: The timing belt pulleys are available in grey cast iron or
steel. Both types provide the required durability and reliability.
We reserve the right to deliver standard pulleys in either version.
In case of peripheral speeds higher than 40 m/s, please contact our
application engineers.
In some cases, the use of standard pulleys – depending on the
bore diameter and loads – can exceed the slipping torques of the
Taper Lock® clamping bushes. At higher torque loads, therefore,
compliance with the maximum permissible values should be
ensured.
Walther Flender Gruppe
PolyChain® GT Timing Belts
PAGE 32
Models
Type 1F
Type 7
Type 2
Type 7F
Type 2F
Type 3F
Type 8
Type 5F
Type 9
Type 6
Type 9F
Type 6F
Type 10
Clamping sets
Walther Flender Gruppe
Clamping sets
Page 34
General features
MLC clamping sets provide a positive-locking, backlash-free
connection that can be released at any time. This protects components such as the shaft and hub from damage from the phenomenon known as excursion. The applications of the MLC clamping
sets range from construction machinery to robots. Distinguishing
features include easy mounting and removal with standard tools
and easy adjustment without profile end mating. MLC clamping
sets transfer torques and axial forces frictionally and backlash-free
between cylindrical shafts and bore holes of the drive elements.
MLC clamping sets feature the following advantages over positive
locking connections:
•
•
•
•
•
•
•
•
•
•
•
•
Low-cost manufacture of the cylindrical press fits for the
clamping sets on shafts and hubs
Backlash-free connection; can be accurately positioned axially
and peripherally
Reduces notch effect
Small shaft diameter due to use of the full, non-weakened
shaft diameter
Extremely fail-safe under changing and intermittent loads
Convenient and reliable dimensioning of the clamping sets
Easy to install and remove using standard tools
Can be reused and exchanged for numerous applications
Ready-to-install and adaptable line of models
Excellent squareness and concentricity
Prevents fretting corrosion
Higher power transmission than feather keys
Calculation instructions
Transmission elements
For dimensioning of a connection between the shaft and hub,
the maximum occurring loads (rated value x load factor) have
to be reliably determined and included in the calculation.
The transmissible values listed in the table for Mt and FAX apply
to the tightening torques MS and cannot be transmitted simultaneously.
For simultaneous acting torque and axial load, the resulting value
MR has to be calculated. This value cannot be greater than the
transmissible torque Mt.
Operational overloads that cause the clamping set to slip are
not permitted.
Information on calculation for specific models is provided
­separately.
The transmissible forces and torques are based on the axial
initial tension of the screws exerted positively through the
conical surfaces as normal radial forces onto the shaft and hub
connection.
Every user has to use a torque wrench to carefully check the
­tightening torques MS.
The resulting transmitted torque in the case of simultaneous
­action of torque and axial force is
MR = √MB2 + (FAB · d/2)2
(Nm)
Condition: MR ≤ Mt
Symbols
d = shaft diameter
(mm)
D = inner hub diameter
(mm)
A = hub/clamping set contact surface
(mm2)
H, H1, H2, H3 = width dimensions
Mt = transmissible torque
(Nm)
MS = tightening torque per screw
(Nm)
(mm)
MB = rated torque to be transmitted
(Nm)
FAB = axial force to be transmitted
(kN)
(kN)
pW = surface pressure on the shaft
(N/mm2)
pW = surface pressure on the hub
(N/mm2)
L = overall width with screws
FAX = transmissible axial force without torque
Walther Flender Gruppe
Clamping sets
Page 35
Hub calculation
The hub material is subjected to tensile stress by the pressure of
the clamping set in the bore. The required outer hub diameter depends on the material, the installation position of the clamping set
and the surface pressure in the hub bore. To keep the stress within
the flexible range, the yield point Rp0,2 is the permissible material
property value.
The following table shows hub diameter factors based on the
three parameters mentioned above. The hub factor X is determined based on the installation position. The calculated surface
pressure pN can be taken from the table with the selected clamping set type. The corresponding hub coefficient for these two values is found under the yield point of the hub material in the table.
The product of the hub coefficient and the outer diameter D of the
clamping set is the minimum outer hub diameter.
DN = D · K
Installation situation
Single clamping sets without
hub centring for shortest hub
width B ≥ H (length of the adjacent clamping rings)
Single clamping sets without
hub centring with width
B ≥ 2 · H and multiple clamping sets with hub centring and
width B ≥ H (1 + z)
When selecting the hub material, take into account that the calculated surface pressure pN cannot be greater than the yield point
Rp0,2.
Examples
1. H
ub material C 35
Yield point 270 N/mm2
Clamping set MLC 5000 A 45 x 75
Factor x = 1, pN = 120 N/mm2
Outer hub diameter DN = 75 x 1.62 = ca. 122 mm
2. H
ub material GG 25
Yield point 180 N/mm2
Clamping set MLC 7000 55 x 85
Factor x = 1, pN = 80 N/mm2
Outer hub diameter DN = 85 x 1.62 = ca. 138 mm
Hub factor
X=1
X = 0,8
z = number of clamping sets
Single clamping sets with hub
centring for hub width B ≥ 2 · H
X = 0,6
If the hub is weakened by bores or threads, the following
applies:
X = 0,8
for B ≥ 2H
or B ≥ H1 (1 + z)
X=1
for B = H
or B = H1 · z
Walther Flender Gruppe
Clamping sets
Page 36
Hub coefficient K
Surface
pressure
pN
N/mm2
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165
Yield point Rp0,2 of the hub material (N/mm2)
Hub
factor
X
150
180
200
220
250
GG 22
GG 25
GG 38
GG 30
GTS 35
GS 45
St 37-2
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
0.6
0.8
1
1.29
1.40
1.53
1.31
1.45
1.61
1.35
1.49
1.66
1.31
1.53
1.75
1.40
1.59
1.82
1.43
1.64
1.91
1.47
1.70
2.01
1.50
1.76
2.12
1.54
1.82
2.25
1.57
1.89
2.39
1.61
1.97
2.56
1.65
2.05
2.76
1.70
2.14
3.01
1.74
2.25
3.33
1.79
2.36
3.75
1.84
2.49
4.37
1.89
2.64
5.40
1.95
2.81
7.67
2.01
3.01
2.07
3.26
2.14
3.56
2.22
3.97
-
1.26
1.31
1.43
1.26
1.36
1.46
1.27
1.39
1.51
1.29
1.43
1.56
1.32
1.46
1.62
1.35
1.50
1.68
1.37
1.54
1.74
1.40
1.58
1.81
1.42
1.62
1.88
1.45
1.67
1.96
1.48
1.72
2.05
1.51
1.77
2.14
1.54
1.82
2.25
1.57
1.88
2.36
1.60
1.94
2.50
1.62
2.01
2.66
1.67
2.08
2.84
1.70
2.16
3.06
1.74
2.25
3.33
1.78
2.34
3.67
1.82
2.44
4.13
1.87
2.56
4.81
1.21
1.25
1.37
1.23
1.31
1.41
1.25
1.35
1.46
1.26
1.37
1.49
1.29
1.40
1.54
1.31
1.43
1.58
1.33
1.47
1.63
1.35
1.50
1.69
1.37
1.54
1.74
1.40
1.57
1.80
1.42
1.61
1.87
1.44
1.65
1.94
1.47
1.70
2.01
1.49
1.74
2.09
1.52
1.79
2.18
1.55
1.84
2.28
1.57
1.89
2.39
1.60
1.95
2.51
1.63
2.01
2.66
1.66
2.07
2.81
1.70
2.14
3.01
1.73
2.22
3.24
1.19
1.24
1.33
1.21
1.29
1.36
1.23
1.31
1.41
1.24
1.33
1.43
1.26
1.36
1.47
1.28
1.39
1.51
1.29
1.41
1.55
1.31
1.44
1.60
1.33
1.47
1.64
1.35
1.51
1.69
1.37
1.54
1.74
1.37
1.57
1.80
1.40
1.61
1.85
1.44
1.64
1.92
1.46
1.68
1.98
1.48
1.72
2.05
1.51
1.76
2.13
1.53
1.81
2.22
1.55
1.85
2.31
1.58
1.90
2.41
1.61
1.95
2.53
1.63
2.01
2.66
GGG 40
GS 52
AlCu4MgSi
1.16
1.23
1.29
1.19
1.25
1.31
1.19
1.26
1.35
1.21
1.29
1.37
1.22
1.31
1.40
1.24
1.33
1.43
1.26
1.35
1.47
1.27
1.38
1.50
1.29
1.40
1.54
1.30
1.43
1.57
1.32
1.45
1.61
1.34
1.48
1.65
1.35
1.51
1.70
1.37
1.54
1.74
1.39
1.57
1.79
1.41
1.60
1.84
1.43
1.63
1.89
1.45
1.66
1.95
1.47
1.70
2.01
1.49
1.73
2.07
1.51
1.77
2.14
1.53
1.81
2.22
270
300
Hub materials
St 50-2
GGG 50
C 35
St 60-2
C 45
1.15
1.13
1.21
1.19
1.26
1.23
1.16
1.14
1.23
1.21
1.29
1.25
1.17
1.16
1.24
1.21
1.31
1.26
1.19
1.16
1.26
1.23
1.34
1.31
1.21
1.19
1.28
1.25
1.37
1.32
1.22
1.20
1.30
1.27
1.40
1.35
1.23
1.21
1.32
1.29
1.42
1.37
1.25
1.22
1.35
1.31
1.45
1.40
1.26
1.23
1.37
1.32
1.49
1.42
1.28
1.25
1.39
1.34
1.52
1.45
1.29
1.26
1.41
1.36
1.55
1.48
1.31
1.27
1.44
1.38
1.59
1.51
1.32
1.29
1.46
1.40
1.62
1.54
1.34
1.30
1.49
1.42
1.66
1.57
1.36
1.31
1.51
1.45
1.70
1.60
1.37
1.33
1.54
1.47
1.74
1.63
1.39
1.34
1.55
1.49
1.79
1.67
1.41
1.36
1.59
1.51
1.83
1.70
1.42
1.37
1.62
1.54
1.88
1.74
1.44
1.39
1.66
1.56
1.93
1.78
1.46
1.40
1.68
1.59
1.99
1.82
1.48
1.42
1.72
1.61
2.05
1.87
350
400
450
600
GGG 60
GS 62
St 70-2
1.11
1.16
1.19
1.12
1.17
1.21
1.13
1.19
1.23
1.15
1.19
1.26
1.16
1.21
1.27
1.17
1.23
1.29
1.18
1.24
1.31
1.19
1.26
1.33
1.20
1.27
1.35
1.21
1.29
1.37
1.22
1.30
1.39
1.23
1.32
1.42
1.24
1.34
1.44
1.25
1.35
1.46
1.26
1.37
1.49
1.28
1.39
1.51
1.29
1.40
1.54
1.30
1.42
1.56
1.31
1.44
1.59
1.32
1.46
1.62
1.34
1.48
1.65
1.35
1.50
1.68
GGG 70
GS 70
C 60
1.10
1.13
1.17
1.11
1.15
1.19
1.12
1.16
1.21
1.13
1.17
1.21
1.14
1.19
1.23
1.15
1.20
1.25
1.16
1.21
1.27
1.16
1.22
1.28
1.17
1.23
1.30
1.18
1.25
1.32
1.19
1.26
1.34
1.20
1.27
1.35
1.21
1.29
1.37
1.22
1.30
1.39
1.23
1.31
1.41
1.24
1.33
1.43
1.25
1.34
1.45
1.26
1.36
1.47
1.27
1.37
1.49
1.28
1.39
1.52
1.29
1.40
1.54
1.30
1.42
1.56
AlZn 5,5 MgCu
25 CrMo4
42CrMo4
1.09
1.12
1.15
1.10
1.13
1.1
1.11
1.14
1.18
1.12
1.15
1.19
1.12
1.16
1.21
1.13
1.17
1.22
1.14
1.19
1.23
1.15
1.20
1.25
1.15
1.21
1.26
1.16
1.22
1.28
1.17
1.23
1.29
1.18
1.24
1.31
1.19
1.25
1.32
1.19
1.26
1.34
1.20
1.28
1.36
1.21
1.20
1.37
1.22
1.30
1.39
1.23
1.31
1.41
1.24
1.32
1.42
1.25
1.34
1.44
1.25
1.35
1.48
1.26
1.36
1.48
1.07
1.09
1.11
1.08
1.10
1.13
1.08
1.11
1.14
1.09
1.12
1.14
1.09
1.12
1.15
1.10
1.13
1.16
1.10
1.14
1.17
1.11
1.15
1.18
1.12
1.15
1.19
1.12
1.16
1.20
1.13
1.17
1.21
1.13
1.18
1.22
1.14
1.19
1.23
1.14
1.19
1.25
1.15
1.20
1.26
1.16
1.21
1.27
1.16
1.22
1.28
1.17
1.23
1.29
1.17
1.24
1.30
1.18
1.24
1.31
1.19
1.25
1.32
1.19
1.26
1.34
Walther Flender Gruppe
Clamping sets
Page 37
Description of models & tables
MLC 3000
Dimensions
Size
This clamping set is self-centring with
excellent concentricity. The extremely
small outer diameter is space-saving
and suitable for small wheel diameters.
The spacer ring between the outer
flange and the hub maintains the fitting
position in the axial direction to enable
exact positioning without a shaft collar.
The push-off threads in the outer flanges
are used for dismantling.
d
D
H
d x D
mm
6 x 14
8 x 15
9 x 16
10 x 16
11 x 18
12 x 18
14 x 23
15 x 24
16 x 24
17 x 25
17 x 26
18 x 26
19 x 27
20 x 28
22 x 32
24 x 34
25 x 34
28 x 39
30 x 41
32 x 43
35 x 47
38 x 50
40 x 53
42 x 55
45 x 59
48 x 62
50 x 65
55 x 71
60 x 77
65 x 84
70 x 90
75 x 95
80 x 100
85 x 106
90 x 112
95 x 120
100 x 125
110 x 140
120 x 155
D1
mm
25
27
28
29
32
32
38
44
44
45
47
47
48
49
54
56
56
61
62
65
69
72
75
78
85
87
92
98
104
111
119
126
131
137
143
153
162
180
198
H
mm
10
11.5
14
14
13.5
13.5
14
16
16
16
18
18
18
18
25
25
25
25
25
25
30
30
30
32
40
45
45
50
50
50
60
60
65
65
65
65
65
90
90
H1
mm
19.5
22
22
22
23
23
23
33
33
33
33
33
33
33
40
40
40
40
40
40
45
45
45
51
59
64
64
69
69
69
84
84
89
89
89
89
94
120
120
H2
mm
21
25
26
26
26
26
26
36
36
36
38
38
38
38
45
45
45
45
45
45
50
50
50
57
65
70
70
75
75
75
91
91
96
96
96
96
102
128
128
Screws
L
mm
24
29
30
30
30
30
30
42
42
42
44
44
44
44
51
51
51
51
51
51
56
56
56
65
73
78
78
83
83
83
101
101
106
106
106
106
114
140
140
DIN 912
12.9
M 3
M 4
M 4
M 4
M 4
M 4
M 4
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
Recommended shaft/hub fitting tolerances
Torque
MS
Nm
2
5
5
5
5
5
5
15
15
15
17
17
17
17
17
17
17
17
17
17
17
17
17
41
41
41
41
41
41
41
83
83
83
83
83
83
145
145
145
Mt
Nm
14
28
41
46
50
55
64
150
150
162
180
200
210
220
250
270
280
500
520
730
800
900
900
1800
1900
2000
2600
2900
3100
3400
5800
6200
7800
8500
11200
11800
14600
16000
17400
Axial
force
FAX
kN
4.8
7
9
9
9
9
9
19
19
19
23
23
23
23
23
23
23
34
34
46
46
46
46
84
84
84
105
105
105
105
170
170
200
200
250
250
300
300
300
h8/H8
Surface
pressures
pw
pN
N/mm2 N/mm2
201
86
197
105
192
108
173
108
164
100
150
100
123
75
208
130
195
130
184
125
187
122
173
120
171
120
168
120
102
70
99
70
95
70
125
90
115
84
155
115
109
81
100
76
95
72
164
125
117
89
97
75
117
90
90
70
90
70
78
60
103
80
89
70
100
80
87
70
112
90
101
80
119
95
78
61
71
55
Walther Flender Gruppe
Clamping sets
Page 38
MLC 5,000 A
Dimensions
Size
H2
Model 5000A
d
D
H
H1
Self-centring clamping sets for larger torques with small, self-locking taper angles.
The diameters are the same as for the MLC
1000, but have a significantly higher transmission force.
Type B prevents axial displacement
between the shaft and hub by means of a
stop ring, thus ensuring exact positioning
in the axial direction. Due to the additional
friction between the hub and the outer
ring, the transmissible load is somewhat
lower.
MLC 5000 B
L
H2
Model 5000B
d
D
D1
H3
H
H1
dxD
mm
20 x 47
22 x 47
24 x 50
25 x 50
28 x 55
30 x 55
32 x 60
35 x 60
38 x 65
40 x 65
42 x 75
45 x 75
48 x 80
50 x 80
55 x 85
60 x 90
65 x 95
70 x 110
75 x 115
80 x 120
85 x 125
90 x 130
95 x 135
100 x 145
110 x 155
120 x 165
130 x 180
140 x 190
150 x 200
160 x 210
170 x 225
180 x 235
H
mm
26
26
26
26
26
26
26
26
26
26
30
30
30
30
30
30
30
40
40
40
40
40
40
45
45
45
45
50
50
50
50
50
H1
mm
37
37
37
37
37
37
37
37
37
37
46
46
46
46
46
46
46
54
54
54
54
54
54
61
61
61
61
68
68
68
68
68
H2
mm
42
42
42
42
42
42
42
42
42
42
51
51
51
51
51
51
51
60
60
60
60
60
60
68
68
68
68
76
76
76
76
76
Screws
L
mm
48
48
48
48
48
48
48
48
48
48
59
59
59
59
59
59
59
70
70
70
70
70
70
80
80
80
80
90
90
90
90
90
DIN 912
12.9
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
M 12
M 14
M 14
M 14
M 14
M 14
MS
Nm
17
17
17
17
17
17
17
17
17
17
41
41
41
41
41
41
41
83
83
83
83
83
83
145
145
145
145
210
210
210
210
210
Mt
Nm
530
580
630
660
740
790
1200
1300
1300
1400
2000
2200
3200
3300
3600
3900
4300
7500
8000
8500
11400
12000
12600
15000
16500
22500
29000
32000
41000
44000
54500
57500
Recommended shaft/hub fitting tolerances
Size
Dimensions
dxD
mm
20 x 47
22 x 47
24 x 50
25 x 50
28 x 55
30 x 55
32 x 60
35 x 60
38 x 65
40 x 65
42 x 75
45 x 75
48 x 80
50 x 80
55 x 85
60 x 90
65 x 95
70 x 110
75 x 115
80 x 120
85 x 125
90 x 130
95 x 135
100 x 145
110 x 155
120 x 165
130 x 180
140 x 190
150 x 200
160 x 210
170 x 225
180 x 235
D1
H
H1 H2 H3
L
mm mm mm mm mm mm
53
26
37
42
31
48
53
26
37
42
31
48
56
26
37
42
31
48
56
26
37
42
31
48
61
26
37
42
31
48
61
26
37
42
31
48
66
26
37
42
31
48
66
26
37
42
31
48
71
26
37
42
31
48
71
26
37
42
31
48
81
30
46
51
35
59
81
30
46
51
35
59
86
30
46
51
35
59
86
30
46
51
35
59
91
30
46
51
35
59
96
30
46
51
35
59
101
30
46
51
35
59
119
40
54
60
45
70
124
40
54
60
45
70
129
40
54
60
45
70
134
40
54
60
45
70
139
40
54
60
45
70
144
40
54
60
46
70
155
45
61
68
52
80
165
45
61
68
52
80
175
45
61
68
52
80
188
45
61
68
52
80
199
50
68
76
58
90
209
50
68
76
58
90
219
50
68
76
58
90
234
50
68
76
58
90
244
50
68
76
58
90
Recommended shaft/hub fitting tolerances
Axial
force
FAX
kN
52
52
52
52
52
52
70
70
70
70
100
100
130
130
130
130
130
210
210
210
270
270
280
300
300
370
450
460
550
550
640
640
Torque
Surface pressures
pw
N/mm2
259
235
208
200
196
183
225
206
188
179
214
200
250
240
216
195
175
204
199
180
221
202
192
189
169
193
208
176
200
184
212
196
pN
N/mm2
110
110
100
100
100
100
120
120
110
110
120
120
150
150
140
130
120
130
130
120
150
140
135
130
120
140
150
130
150
140
160
150
h8/H8
Screws
DIN 912
12.9
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
M 12
M 14
M 14
M 14
M 14
M 14
Torque
MS
Nm
17
17
17
17
17
17
17
17
17
17
41
41
41
41
41
41
41
83
83
83
83
83
83
145
145
145
145
230
230
230
230
230
Mt
Nm
320
360
390
400
450
490
690
750
820
860
1300
1400
2000
2000
2200
2400
2600
4600
5000
5200
7000
7400
7800
9800
10700
14600
19000
23000
30000
32000
39000
41000
Axialkraft
FAX
kN
33
33
33
33
33
33
43
43
43
43
60
60
80
80
80
80
80
130
130
130
170
170
170
190
190
240
300
330
400
400
460
460
h8/H8
Surface pressures
pw
N/mm2
165
150
146
140
118
110
131
120
120
114
125
117
150
144
139
120
102
126
123
105
132
116
114
116
99
124
138
122
133
131
146
131
pN
N/mm2
70
70
70
70
60
60
70
70
70
70
70
70
90
90
90
80
70
80
80
70
90
80
80
80
70
90
100
90
100
100
110
100
Walther Flender Gruppe
Clamping sets
Page 39
MLC 5006
Dimensions
Size
L
H2
Model 5006
d
D
H
H1
This is the least expensive and most
popular of all clamping sets. It differs
from the MLC 5000 in that it has a shorter
installation length, making it more suitable
for narrow, disk-shaped wheel hubs. The
diameters are the same. The MLC 5007 has
a larger flange diameter as a stop for axial
positioning of the hub. The friction between the outer ring and the hub reduces
the transferred torque as compared with
the MLC 5006. Both models are self-centring and self-locking in the clamping state.
Due to the high demand, these models are
always in stock.
MLC 5007
L
H2
Model 5007
d
D
D1
H3
H
H1
dxD
mm
18 x 47
19 x 47
20 x 47
22 x 47
24 x 50
25 x 50
28 x 55
30 x 55
32 x 60
35 x 60
38 x 65
40 x 65
42 x 75
45 x 75
48 x 80
50 x 80
55 x 85
60 x 90
65 x 95
70 x 110
75 x 115
80 x 120
85 x 125
90 x 130
95 x 135
100 x 145
110 x 155
120 x 165
130 x 180
140 x 190
150 x 200
160 x 210
H
mm
17
17
17
17
17
17
17
17
17
17
17
17
20
20
20
20
20
20
20
24
24
24
24
24
24
26
26
26
34
34
34
34
H1
mm
25
25
25
25
25
25
25
25
25
25
25
25
30
30
30
30
30
30
30
36
36
36
36
36
36
40
40
40
48
50
50
50
H2
mm
28
28
28
28
28
28
28
28
28
28
28
28
33
33
33.5
33.5
33.5
33.5
33.5
40
40
40
40
40
40
44
44
44
52
54
54
54
Screws
L
mm
34
34
34
34
34
34
34
34
34
34
34
34
41
41
41
41
41
41
41
50
50
50
50
50
50
56
56
56
64
68
68
68
DIN 912
12.9
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
M 12
M 14
M 14
M 14
MS
Nm
14
14
14
14
14
14
14
14
14
14
14
14
35
35
35
35
35
35
35
70
70
70
70
70
70
115
115
115
115
185
185
185
Mt
Nm
370
390
410
450
490
510
570
610
880
960
1000
1100
2200
2400
2500
2600
2900
3100
3400
6000
6400
6800
9000
9600
10200
12000
13000
16000
23000
25000
30000
38800
Recommended shaft/hub fitting tolerances
Size
Dimensions
dxD
mm
18 x 47
19 x 47
20 x 47
22 x 47
24 x 50
25 x 50
28 x 55
30 x 55
32 x 60
35 x 60
38 x 65
40 x 65
42 x 75
45 x 75
48 x 80
50 x 80
55 x 85
60 x 90
65 x 95
70 x 110
75 x 115
80 x 120
85 x 125
90 x 130
95 x 135
100 x 145
110 x 155
120 x 165
130 x 180
140 x 190
150 x 200
160 x 210
180 x 235
200 x 260
D1
H
H1 H2 H3
L
mm mm mm mm mm mm
53
17
25
28
22
34
53
17
25
28
22
34
53
17
25
28
22
34
53
17
25
28
22
34
56
17
25
28
22
34
56
17
25
28
22
34
61.4 17
25
28
22
34
61.4 17
25
28
22
34
67
17
25
28
22
34
67
17
25
28
22
34
72
17
25
28
22
34
72
17
25
28
22
34
84
20
30
33
25
41
84
20
30
33
25
41
89
20
30 33.5 24
41
89
20
30 33.5 24
41
94
20
30 33.5 24
41
99
20
30 33.5 24
41
104 20
30 33.5 24
41
119 24
36
40
29
41
124 24
36
40
29
50
129 24
36
40
29
50
134 24
36
40
29
50
139 24
36
40
29
50
144 24
36
40
29
50
154 26
40
44
31
56
164 26
40
44
31
56
174 26
40
44
31
56
189 34
48
52
39
64
199 34
50
54
39
68
209 34
50
54
39
68
219 34
50
54
39
68
244 44
60
64
49
78
269 44
60
64
49
78
Recommended shaft/hub fitting tolerances
Axial
force
FAX
kN
41
41
41
41
41
41
41
41
55
55
55
55
105
105
105
105
105
105
105
170
170
170
210
210
210
235
260
270
350
360
400
480
Torque
Surface pressures
pw
N/mm2
366
346
329
299
271
260
236
220
272
249
231
219
339
317
292
280
255
233
219
275
261
240
279
267
263
247
225
227
215
204
207
223
pN
N/mm2
140
140
140
140
130
130
120
120
145
145
135
135
190
190
175
175
165
155
150
175
170
160
190
185
185
170
160
165
155
150
155
170
h8/H8
Screws
DIN 912
12.9
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
M 12
M 14
M 14
M 14
M 14
M 14
Torque
MS
Nm
17
17
17
17
17
17
17
17
17
17
17
17
41
41
41
41
41
41
41
83
83
83
83
83
83
145
145
145
145
230
230
230
230
230
Mt
Nm
290
300
320
350
390
400
450
490
700
760
820
870
1700
1800
1900
2000
2200
2400
2600
4600
5000
5300
7000
7400
7800
9700
10700
14600
19000
23000
24500
31300
35000
49000
Axialkraft
FAX
kN
32
32
32
32
32
32
32
32
43
43
43
43
80
80
80
80
80
80
80
130
130
130
160
160
160
200
200
242
300
330
330
390
390
500
h8/H8
Flächenpresungen
pw
pN
2
N/mm
N/mm2
261
100
247
100
235
100
214
100
208
100
200
100
177
90
165
90
206
110
189
110
171
100
163
100
250
140
233
140
217
130
208
130
185
120
180
120
161
110
204
130
199
130
180
120
221
150
202
140
185
130
203
140
183
130
206
150
180
130
190
140
173
130
197
150
144
110
143
110
Walther Flender Gruppe
Clamping sets
Page 40
MLC 7000
Dimensions
Size
This model, similar to the MLC 4000 series,
can withstand very high loads and is especially suitable for a smaller diameter range
and a shorter installation length.
The diameter gradations are the same.
These clamping sets are self-centring and
self-locking with excellent concentricity
and runout properties, also compared with
resulting torques. The very small taper
angles mean that the clamping travel is
relatively large. The inner clamping ring
requires greater axial clearance for release
(s = 0.02 · d).
L
H2
Model 7000
H
mm
41
41
41
41
41
58
58
58
58
70
70
70
70
70
70
92
92
92
108
108
108
108
132
132
132
132
132
132
134
165
165
H2
mm
45
45
45
45
45
62
62
62
62
76
76
76
76
76
76
98
98
98
114
114
114
114
146
146
146
146
146
146
148
177
177
L
mm
51
51
51
51
51
70
70
70
70
86
86
86
86
86
86
110
110
110
128
128
128
128
162
162
162
162
162
162
164
197
197
Torque
MS
Nm
17
17
17
17
41
41
41
41
41
83
83
83
83
83
83
145
145
145
230
230
230
230
355
355
355
355
355
355
355
690
690
Axial force
Mt
Nm
700
1200
1400
2000
3200
3600
4000
5400
5800
10300
11000
14000
15000
16000
17000
26000
29000
36400
45400
57000
70000
75000
95000
115000
121500
128000
140500
210000
255000
368000
430000
h8/H8
D
Recommended shaft/hub fitting tolerances
Screws
DIN 912
-12.9
M 6
M 6
M 6
M 6
M 8
M 8
M 8
M 8
M 8
M 10
M 10
M 10
M 10
M 10
M 10
M 12
M 12
M 12
M 14
M 14
M 14
M 14
M 16
M 16
M 16
M 16
M 16
M 16
M 16
M 20
M 20
d
H
dxD
mm
25 x 50
30 x 55
35 x 60
40 x 65
45 x 75
50 x 80
55 x 85
60 x 90
65 x 95
70 x 110
75 x 115
80 x 120
85 x 125
90 x 130
95 x 135
100 x 145
110 x 155
120 x 165
130 x 180
140 x 190
150 x 200
160 x 210
170 x 225
180 x 235
190 x 250
200 x 260
220 x 285
240 x 305
260 x 325
280 x 355
300 x 375
Further information is available at www.maschinenlager.de
FAX
kN
55
70
70
90
140
140
140
170
170
280
280
340
340
310
340
500
500
600
700
800
900
900
1100
1200
1200
1200
1200
1500
196
262
292
Surface pressures
pw
N/mm2
160
165
154
163
217
128
124
135
132
157
153
165
162
144
142
145
141
151
138
149
160
144
132
144
132
130
117
140
225
241
244
pN
N/mm2
80
90
90
100
130
80
80
90
90
100
100
110
110
100
100
100
100
110
100
110
120
110
100
110
100
100
90
110
180
190
195
Walther Flender Gruppe
Clamping sets
Page 41
Taper Lock® clamping bushes
In addition to the cylindrical clamping elements listed here, we also offer an extensive line of conical TL clamping elements.
Disassembly
Remove screws, insert one as a pushoff screw into the hole with a half
thread in the bush and tighten.
Installation
Clean and degrease all exposed
surfaces. Fit pulley and bush, align
holes and screw in screws loosely.
This loosens the Taper Lock® bush.
Remove the loosened pulley unit
– without impact to prevent
damage to the machine – by hand.
Push pulley with bush onto the
shaft, align and tighten screws
evenly to the correct torque according to the table.
Mounting bores
Disassembly bores
The empty bores should be filled
with grease to prevent penetration
by foreign objects.
008
1008 to 3030
3525 to 5050
If high torques have to be transmitted and no feather key is used,
the Taper Lock® clamping bush can be driven further into the conical bore by lightly tapping with a hammer, using a suitable sleeve
or wooden block. Afterwards, the screws can be tightened a bit
more. This procedure can be repeated.
Model
3525
3535
4030
4040
4535
4545
5040
5050
5.6
1108 1210 1610 1615 2012 2517 3020 3030
5.6
20
20
20
30
50
90
90
Torque [Nm]
115
115
170
170
190
190
270
270
2
2
2
2
2
2
2
2
2
Number of screws
3
3
3
3
3
3
3
3
1/4“
1/4“
3/8“
3/8“
5/8“
5/8“
Screw ø (inches)
1/2“
1/2“
5/8“
5/8“
3/4“
3/4“
7/8“
7/8“
3
3
5
5
8
8
Hexagon SLW (mm)
10
10
12
12
14
14
14
14
Taper Lock®
­clamping bush
1008
1108
1210
1610
+
1615
2012
2517
3/8“ 7/16“ 1/2“
5
6
6
Bush bore
(mm)
Slipping torque
(Nm*)
Clamping force
N
Taper Lock®
­clamping bush
12
19
24
12
19
24
28
16
19
24
32
19
24
38
42
24
38
42
48
50
24
38
42
48
55
60
29
51
66
28
49
64
79
82
105
142
210
98
135
240
265
165
310
340
400
420
220
380
430
510
600
670
3990
4940
5490
–
4630
5220
5720
8840
9800
10900
12300
–
9570
11900
12700
11500
14400
15700
–
16700
–
17000
18500
–
21000
22300
3020
+
3030
3525
+
3535
4030
+
4040
4535
+
4545
5040
+
5050
Bush bore
(mm)
38
48
55
60
75
42
60
75
90
48
60
75
100
55
75
100
110
75
100
125
Slipping torque
(Nm*)
520
730
890
970
1300
1000
1580
2150
2600
1700
2300
3150
4400
2500
3900
5500
6300
3950
5650
7370
Clamping force
N
23900
26100
29900
31500
34500
41000
49800
54800
59000
–
70200
77200
89400
79600
93000
107700
–
91800
106600
119500
* The specified slipping torques were measured on test stands.
The screws were tightened to the corresponding torque.
Taper Lock® is a trademark of J. H. Fenner and Co. Ltd.
Walther Flender Gruppe
Clamping sets
Page 42
Taper Lock® clamping bushes
4 hole
Bush
no.
1008
1108
1210
1310
1610
1615
2012
2517
3020
3030
Bush bore
mm
10
11 12
14 16
18 19 20 22
24 25
10
11 12
14 16
18 19 20 22
24 25
28
11 12
14 16
18 19 20 22
24 25 28 30
32
14 16
18 19 20 22
24 25 28 30
32
35
14 15 16
18 19 20 22
24 25 28 30
32 35 38
40 42
14 16
18 19 20 22
24 25 28 30
32 35 38
40 42
14 16
18 19 20 22
24 25 28 30
32 35 38
40 42
45 48 50
16
18 19 20 22
24 25 28 30
32 35 38
40 42
45 48 50
55
60
25 28 30
32 35 38
40 42
45 48 50
55
60 65
70 75
35 38
40 42
45 48 50
55
60 65
70 75
* Bore with flat groove
Keyway
mm
wide deep
3
1.4
4
1.8
5
2.3
6
2.8
8
1.3*
3
1.4
4
1.8
5
2.3
6
2.8
8
3.3
8
1.3*
4
1.8
5
2.3
6
2.8
8
3.3
10
3.3
5
2.3
6
2.8
8
3.3
10
3.3
10
1.3*
5
2.3
6
2.8
8
3.3
10
3.3
12
3.3
5
2.3
6
2.8
8
3.3
10
3.3
12
1.3*
5
2.3
6
2.8
8
3.3
10
3.3
12
3.3
14
3.8
5
2.3
6
2.8
8
3.3
10
3.3
12
3.3
14
3.8
16
4.3
18
4.4
8
3.3
10
3.3
12
3.3
14
3.8
16
4.3
18
4.3
20
4.9
10
12
14
16
18
20
3.3
3.3
3.8
4.3
4.4
4.9
5 hole
Bush
length
mm
Approx.
weight
kg
22.3
0.15
to
0.08
Largest
­diameter
mm
Bush
no.
35
3525
0.18
to
0.10
38
25.4
0.17
to
0.30
47.5
25.4
0.19
to
0.33
51
25.4
0.42
to
0.20
57
38.1
0.60
to
0.25
57
31.8
0.80
to
0.38
70
1.7
to
0.80
85.5
22.3
44.5
50.8
76.2
2.8
to
1.5
4.0
to
2.1
3535
4030
4040
4535
4545
108
5040
108
5050
Bush bore
mm
35 38
40 42
45 48 50
55
60 65
70 75
80 85
90 95
100
35 38
40 42
45 48 50
55
60 65
70 75
80 85
90
40 42
45 48 50
55
60 65
70 75
80 85
90 95
100 105 110
115
40 42
45 48 50
55
60 65
70 75
80 85
90 95
100
55
60 65
70 75
80 85
90 95
100 105 110
115 120 125
55
60 65
70 75
80 85
90 95
100 105 110
70 75
80 85
90 95
100 105 110
115 120 125
70 75
80 85
90 95
100 105 110
115 120 125
Keyway
mm
wide deep
10
3.3
12
3.3
14
3.8
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
28
4.4*
10
3.3
12
3.3
14
3.8
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
12
3.3
14
3.8
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
28
6.4
32
5.4*
12
3.3
14
3.8
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
28
6.4
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
28
6.4
32
7.4
16
4.3
18
4.4
20
4.9
22
5.4
25
5.4
28
6.4
20
4.9
22
5.4
25
5.4
28
6.4
32
7.4
20
4.9
22
5.4
25
5.4
28
6.4
32
7.4
Bush
length
mm
Approx.
weight
kg
5.5
Largest
­diameter
mm
64
to
127
1.8
6.6
88.9
to
127
3.2
7.4
76
to
146
4.2
10.1
101.6
to
146
5.2
10.7
89
to
162
4.2
13.2
114.3
to
162
7.4
12.2
102
to
178
6.2
15.2
127
to
9.2
178
Walther Flender Gruppe
Clamping sets
Page 43
Causes of malfunctions
Fault
Cause
Solution
Excessive noise levels
Misalignment of pulleys
Excessive belt tension
Overload of drive system
Worn timing belt pulley
Incorrect pulley profile
Rim flange stop face too large
Air displacement in hollows
Align pulleys
Reduce initial tension
Increase belt width
Replace timing belt pulley
Correct profile
Use of standard rim flanges with bending radius
Custom profile
Visible belt elongation
Reduction of centre distance of axes due to loosening of
the shaft bearings or timing belt pulley mounting
Pulley wear (outer diameter)
Overload of drive system
Heat-up and subsequent cooling of drive system
Reset centre distance of axes and reinforce mounting
Excessive change in the timing belt material
(melting, softening)
Replace timing belt pulley
Redesign drive system
Check thermal expansion coefficient and use other
materials, if necessary
Reduce temperatures to permissible range
Belt runs off to side
Belt runs off the side of the timing belt pulley
Excessive wear on side of belt
Align drive system correctly
Align drive system correctly
Loosening of rim flanges
Misalignment of pulleys, resulting in excessive axial forces
Align pulleys
Excessive wear on side
of belt
Incorrect axis parallelism or change in the centre
distance of axes due to insufficient strength of
bearings and axles
Rim flanges defective or not bevelled
Damage due to incorrect handling
Timing belt too wide
Check axis parallelism and/or increase strength
of axles and bearings
Premature tooth wear
Initial tension too high or too low
Belt runs off over rim flange
Incorrect belt profile for timing belt pulley
Worn timing belt pulley
Timing belt pulley surface too rough
Overload
Excessive damage due to foreign objects
Correct initial tension
Align timing belt pulley/correct initial tension
Use PolyChain® timing belt pulleys
Replace timing belt pulley
Replace timing belt pulley
System must be redesigned
Timing belt cover
Shearing of belt teeth
Not enough teeth meshing
Overload of drive system
Worn timing belt pulley
Incorrect belt profile for timing belt pulley
Insufficient belt tension
Extreme shock loads
Increase number of pulley teeth or use
smaller pitch
Increase belt width
Replace timing belt pulley
Use correct tooth profile
Set correct belt tension
System must be redesigned
Broken belt
Timing belt pulley diameter too small
Overload of drive system
Foreign objects
Incorrect handling of timing belt during installation,­
belt damaged from kinking or bending
Increase pulley diameter or belt power output
Use wider timing belt
Protective drive cover
Comply with installation instructions
Abnormal wear of
timing belt pulley (outer
diameter or tooth flanks)
Increased belt tension or overload
of drive system
Timing belt pulley diameter too small
Incorrect profile
Foreign objects
Reduce initial tension or increase belt width;
redesign system, if necessary
Use correct timing belt pulleys
Use correct drive system
Protective drive cover
Cracks in tooth back
Temperature too low
Temperature too high
Aggressive chemicals
Avoid low temperatures
Avoid high temperatures
Protective drive cover
Increased temperature
Initial tension too high or too low
Incorrect timing belt profile or timing belt pulley profile
Outer diameter too large
Set correct initial belt tension
Use correct drive system
Correct outer diameter
Vibrations
Initial tension too high or too low
Loose timing belt pulley
Set correct initial belt tension
Re-attach timing belt pulleys and mount according to
specifications
Install a tangential tension pulley
Vibrations in the slack side
Align or replace rim flanges
Follow procedure in assembly instructions
Use timing belt pulleys with correct width
Walther Flender Gruppe
Clamping sets
Product overview
WF timing belt drive systems
WF timing belts are available in 5 basic systems for diverse transmission requirements.
The powerful PowerGrip® GT3 and PolyChain belt systems ensure compact power density
with high cost effectiveness.
Shaped belts and flex belts in fixed lengths of your choice or as polyurethane metre ware
in a wide range of pitches are available as an ideal transmission solution for almost all
transport and conveyor requirements. These timing belts can additionally be supplied
with cams or various coatings on the reverse.
Special range of WF timing belt pulleys
Special builds of timing belt pulleys based on customer drawings can be produced on the
most modern manufacturing machinery. A wide selection of materials and moulded parts
in plastic, sintered materials, or die-cast complete the range for series applications.
WF shaft couplings
Various ranges of shaft couplings in torsion-proof or torsionally flexible versions are
available for a multiplicity of applications.
WF drive assemblies
Supported by 3D CAD systems and their corresponding calculation software, Walther
Flender Antriebstechnik develops and supplies complete assemblies for diverse drive
technology requirements. At the request of the customer, existing designs are optimised
in terms of technology and efficiency. An example of this is the unit shown adjacent,
which conveys paper webs.
WF conveyor rollers
Walther Flender Antriebstechnik designs and builds conveyor rollers for heavy weights
­especially for skid transport in the automotive industry. Two models are shown as
­examples (driven on one and both sides).
WF transmissions
The WF range of transmissions includes worm gears, straight bevel and cylindrical gears
and right angled gears for high torques up to 1,000,000 Nm. All types are available in
a practical range of sizes, with or without motors.
Page 44
Walther Flender Gruppe
Clamping sets
Page 45
Project data sheet
Data sheet for calculating
Belt drive systems
Walther Flender GmbH
Company
Name / Department
Street / P.O. Box
Zip code / City
Phone
Fax
E-mail
Postfach 13 02 80
Schwarzer Weg 100 –107
40593 Düsseldorf
Fax: +49.(0)211.70 07-339
E-Mail: info@walther-flender.de
Application:
yes
Existing drive system with
to be replaced by
Drive data:
Type
Speed
Power output
Torque
no
Driving machine
(e.g. electric motor)
Make
Model
n1
P
Braking torque
Requirement
Working machine
(e.g. machine tool)
min-1
kW
Nm
n2
P
kW
Starting torque
Starting characteristics
(e.g. torque flow, starting type)
Pulley diameter
Pitch diameter dw1
Outer diameter da1
Permissible diameter range
from
mm
Max. permissible pulley width
mm
Transmission ratio i
imin
Existing centre distance of axes a
Pulley diameter
to
Shaft arrangement
mm
mm
Pitch diameter dw2
Outer diameter da2
mm
from
imax
mm
mm
mm
to
mm
to
step-down
Centre distance adjustment range
mm
inner pulley
outer pulley
amax
load side
lostum
mm
horizontal
Pmax
mm
mm
dw
da
mm
vertical
Operating conditions:
Chemical influences (e.g. oil, dust, etc.)
Ambient temperature
°C
Daily operating hours
hours/day
Desired noise level
dBA
min-1
kW
Nm
Type of load
uniform
non-uniform
alternating
reversing
Centre distance of axes range (for new design) amin
Idlers / guide pulleys
Quantity/year
Number of times switched on / off daily
mm
step-up
fixed
mm
Notizen
Notizen
Walther Flender Gruppe
Schwarzer Weg 100–107
40593 Düsseldorf
Deutschland
Tel. : +49.(0)211.70 07- 00
Fax: +49.(0)211.70 07-227
E-Mail: info@walther-flender.de
PolCha_en_Nov_09
www.walther-flender-gruppe.de