...with automatic
belt tensioning
Power-Transmission
Equipment
for economy,
efficiency and
reliability
Catalog Index
T
hank you for your interest in Hi-Lo
Manufacturing. For over 56 years, Hi-Lo
Manufacturing has produced reliable,
efficient and economical Variable Speed
Pulley Drives. Our innovative automatic belt
tensioning design coordinates belt tension
with load requirement and makes our
Variable Speed Pulleys an industry favorite.
Hi-Lo Manufacturing carries a full line of
Variable Speed Pulley Drive products:
• Adjustable and Fixed Center Distance
Pulley Drives, and VARI-Mod Drive Systems
• Asymmetric Pulley Drives
• Variable Speed Belts, Sheaves, Bushings,
Collets and Motor Bases
• Hi-Ratio Compound Drives
• Custom Machining
Table of Contents
Adjustable
Center
Distance
Drives
Click on where you want to go
Motor &
Motor Base
Variable
Speed Pulley
Min. RPM & Pitch
Diameter Position
Pages 7–20
TBR Series
Single Face Moveable
Asymmetric Variable Speed Pulleys
Design Features ..............................22
Collets, Sheaves and Belts ..............23
Pages 10–11
The TBR series of pulleys
have single face movement
to provide greater economy
on longer center distance VV drives where absolute
belt alignment is not critical.
Their through bore
construction allows mounting from either end.
Fixed Center Distance Drives
Selection Guide and Worksheet 25–26
Drive Summary ..............................27
MCV Series................................28–29
MCW Series ..............................30–31
MA Series 5–30 HP ..................32–33
MA Series 40–125 HP ..............34–35
VARI-Mod Transmission Cases ......36–38
Hi-Ratio Compound Pulleys ..........39–40
Sales office Information ......................42
Hi-Lo Manufacturing
1700 G Freeway Blvd.
Minneapolis, MN 55430
612-566-2510 • fax: (612) 566-0562
E-mail: hi-lo-mfg@usinternet.com
www.hi-lo.com
Single
.75
1
1
1.5
2
3
5
5
Double Face Moveable
Pages 12–15
Both the DCV & DCW
series have double pulley
face movement to
maintain belt alignment on
V-V drives.
Asymmetric Drives
Pages 22, 16–17 & 32–33
Page 20
Hi-Lo Motor Bases for
Adjustable Center Distance
Drives have been designed to
accommodate NEMA motor
frame sizes 48 through 286T.
Face Moveable
2.3:1
DCV140
2.5:1
DCV150
3:1
DCW1160
2.2:1 DCV157-20
2.2:1
DCV157
3:1
DCW1270
2.5:1
DCV167
3:1
DCW1590
3:1
DCW1711
2.5:1
DCW2011
3:1
DCW2513
Page
10
10
10
10
10
10
10
10
12
12
14
12
12
14
12
14
14
14
14
Two Groove/Belt Pulleys
5
2:1
DCV257
7.5 1.75:1
DCV265
12
12
Asymmetric
5
3:1
10
3:1
20
2.5:1
30
2.3:1
16
16
16
16
Belts
Page 18
MOTOR BASES
Series
Model
Face Moveable
2:1
30TBR
2.5:1
40TBR
3.4:1
40TBR-W
2.7:1
50TBR
2.5: 1
57-20TBR
2.5:1
57TBR
2:1
66TBR
1.6:1
86TBR
Double
1
1.5
1.5
2
3
3
5
5
10
20
30
DCV & DCW Series
With Asymmetric Drives, the
fixed pulley face is nearly
perpendicular. This feature
means negligible movement
of the belt center line
throughout the entire pitch
diameter range. The overhung
load is minimal and the drive
space is very compact. The
reduction of parts in the single
sliding face design cuts down
on wear.
Max. RPM & Pitch
Diameter Position
Rated Pitch
HP
Ratio
Design Features ....................................5
Design Formulas and Charts..................6
Adjustable Center Distance Pulleys
Selection Guide and Worksheet ........7
Drive Summary ............................8–9
TBR Series ................................10–11
DCV Series ................................12–13
DCW Series ..............................14–15
Asymmetric ..............................16–17
V-Belts ................................................18
V-Belt Sheaves ....................................19
Bushings..............................................19
Collet Bushings ..................................20
Motor Bases ..................................20–21
Driven Sheave
Hi-Lo Belts are selected for
optimum performance on
variable speed pulley drives.
They are dimensionally
stable, crush resistant, oil
and heat resistant, and static
dissipating.
A96
A112
A112-33
A130-33
Sheaves & Bushings
Page 18
Variable Speed Belt and
Asymmetric Belt sheaves are
made of close-grained cast iron,
accurately machined and
balanced for true running
performance. They use “QD”
bushings to provide a wide
range of standard bore sizes
and tight bore-shaft fits with
ease of installation.
Fixed Center Distance Drives
Rated HP
Driven RPM
1750
at
to Max. Min.
Drive
Ratio
RPM Range
1750 Motor
Driver
Model #
Pages 25 - 35 or simply click on where you want to go
Manually Operated
Driver Pulley
Driven
Model #
Page
Min. RPM
Position
Max. RPM
Position
V-Belt Drives
MCV30
.75
1.0
.38
.39
4:1
3.1:1
875/3500
687/2106
1.5
2.0
2.0
2.0
2.0
.55
.64
.64
.55
.52
7.1:1
5: 1
5.4:1
4.6:1
3.8:1
647/4625
557/3014
557/3014
485/2248
367/1408
30TBR
40TBR
MCV500
50TBR
57-20TBR
57TBR
66TBR
86TBR
MCV57
3.0
3.0
5.0
1.10
.97
1.22
6.9:1
5.7:1
4.0:1
1648/4500
564/3214
427/1750
1.0
1.5
.31
.34
10:1
7.5:1
550/5500
400/3000
2.0
3.0
3.0
.50
.65
.60
9.6:1
7.7:1
5.8:1
423/4075
375/2863
305/1776
3.0
5.0
.77
1.00
7.7:1
5.8:1
450/3470
365/2108
3.0
5.0
5.0
.77
1.00
.96
10:1
9:1
7.4:1
450/4500
380/3420
336/2490
57TBR
66TBR
86TBR
MCW600
60TBR
75TBR
MCW70
80TBR
90-19TBR
110TBR
MCW77
90-19TBR
110TBR
MCW90
90-23TBR
106TBR
120TBR
MCW90-75
7.5
1.70
6:1
395/2367
120TBR
28
28
28
28
28
28
28
28
28
28
28
28
28
32
32
32
30
30
30
30
30
30
30
30
30
30
30
30
30
Asymmetric Belt Drives
MA82
5.0
1.50
6:1
500/3000
10.0
3.20
5.4:1
560/3000
A96
MA96
A112
MA112
15.0
4.30
6:1
500/3000
A130
MA112-33
30.0
9.80
5:1
600/3000
A130-33
MA136
40.0
11.40
5:1
600/3000
A164
MA164
50.0
60.0
35.00
30.00
4.5:1
4.6:1
784/3580
700/3220
75.0
100
55.00
40.00
3:1
4:1
1010/3000
595/2380
A164
A177
MA177
A177
A221
MA221
125
75.80
2.5:1
838/2055
VARI-Mod DRIVES
Page 36
A complete variable speed drive system
which can be combined with off-the-shelf
components to build variable speed
drives of all types and arrangements.
A221
32
32
32
32
32
32
32
32
34
34
34
34
34
34
34
34
34
34
Automatic
Driven Pulley
MCV & MCW Series (V-Belt Drive)
Pages 28 & 30
The MCV and MCW
series pulleys are Fixed
Center Distance Drive
type pulleys. The MCV
uses Standard V-Belts
and have horsepower
ratings from fractional to
5 HP. the MCW pulleys
use Variable Speed Belts
and have horsepower
ratings from 1 to 7-1/2
HP. The automatic
pulleys have Automatic
Belt Tensioning.
MA Series (Asymmetric Belt Drive)
Pages 34–37
The MA series pulleys have a 5 to 125 HP capacity range
and use a unique patented Asymmetric Belt that maintains
belt alignment with single face movement of the pulleys.
The driven pulleys incorporate automatic belt tensioning.
Hi-Ratio
Compound Pulleys
Pages 39–40
The Hi-Ratio series of
pulleys are compound
ratio type pulleys using
Standard V-Belts. The
horsepower range is
fractional to 1 HP with
speed variation ratios
up to 7:1.
4
What is a Variable Speed Pulley Drive?
A variable speed pulley is a V-grooved sheave in which the groove
width can be mechanically increased or decreased to allow a
V-belt to ride in the groove at various diameters. Its function is to
vary the speed of and transmit power to a driven shaft through a
V-Belt and a companion sheave.
The speed is varied by changing the diameter at which the belt
rides in the variable speed pulley and, therefore, the ratio between
it and the companion sheave.
There are two basic types of Hi-Lo Variable Speed Pulley Drives:
Adjustable Center Distance Drives and
Fixed Center Distance Drives
Adjustable Center Distance Drives
Motor &
Motor Base
One shaft is fixed and the other is moveable. The variable
speed pulley is normally mounted on the moveable shaft and a
fixed diameter sheave on the stationary shaft. By using an
adjustable motor base, speed variation of the driven shaft is
accomplished by mechanically changing the center distance
between the shafts. An increase in center distance will pull the
belt to a smaller diameter in the variable speed pulley. This
increases the drive ratio and reduces the driven shaft RPM. A
decrease in center distance allows the spring loaded pulley
faces to close and push the belt to a larger diameter.
Variable
Speed Pulley
Driven Sheave
Min. RPM & Pitch
Diameter Position
Max. RPM & Pitch
Diameter Position
Fixed Center Distance Drives
Manually Operated
Driver Pulley
The driver and the driven shafts are both stationary. The drive
consists of two adjustable pitch diameter pulleys. One pulley
is manually controlled by means of an adjusting screw. The
driven pulley adjusts automatically to belt movement. Speed
variation is accomplished by turning the adjusting screw in the
mechanical pulley, causing the pulley faces to move in or out
and, therefore, changing the pitch diameter at which the belt
rides. This causes a compensating opposite change of the
pitch diameter in the automatic pulley, usually mounted as the
driven pulley. The RPM of the driven shaft changes with the
change of ratio in the pitch diameters of the two pulleys.
V-Belt Tensioning
To the right is an illustration
of the tension loads which
are applied to a variable
speed pulley. These loads
must be counteracted by
axial pressure in the pulley
to maintain the necessary
tension to transmit a
required driven load.
Resolution of Tension
Forces on V-Belt
In the figure to the right,
F1= Tt. F2 and F3 are the
forces applied perpendicular to the Pulley faces by
F1, which axially spread the
faces. F4 and F5 are the
axial forces which must be
counteracted to maintain
belt tension.
Min. RPM
Position
Max. RPM
Position
Automatic
Driven Pulley
Formulas
T1 Tight-side Tension
Motor
Rotation
Where:
HP
Hi-Lo
Tt
Driver
Pulley
Driven
Sheave
V
T2 Slack-side Tension
Tension Force Direction
Resolution of Tension Forces on V-Belt
= Design Horsepower
= Belt Velocity in feet per minute
= .262 x Pulley Dia. (in.) x Pulley RPM
Te
= Effective Belt Tension
= 33,000 x HP
V
R = Tension Ratio = T1 = (Normally from 3 to 5)
T2
( )
R
R-1
T1
= Te x
T2
=T1 - Te
Tt
= T1+ T2 = Total Belt Tension
(omitting the effect of centrifugal force)
5
Automatic Belt Tensioning
Variable speed pulleys are often subjected to short duration loads,
such as high starting loads and cyclical loads which are considerably larger than normal running loads. To transmit these loads,
without slippage or loss of performance, belt tension well in excess
of required running load tension must be developed.
Variable
Speed Belt
Cam Followers
rotate up cam
ramp as load
increases.
However, the more a belt is subjected to the extra tension
required for peak loads, the greater the chance to fatigue the belt
and other drive components. The efficiency of the drive is also
affected adversely.
Automatic Belt Tensioning solves drive fatigue problem.
Hi-Lo pulleys reduce unwanted belt tension by automatically
adjusting belt tension with an exclusive cam mechanism. The load
requirement itself determines how much axial force and resulting
belt tension is needed. Consequently a Hi-Lo Pulley automatically
grips the belt tighter at start up and peak loads, then relaxes its
grip at normal running loads. Your drives live longer.
Belt Tension
The power rating of a variable speed pulley depends on the force
it can transmit through a V-belt and companion sheave to a driven
shaft. The most common means of providing belt tension is by an
axial force applied by a compression spring against the movable
flange of the variable speed pulley. The larger the load requirement
of a drive, the greater the required belt tension and the greater the
required axial force (normally 3 times the effective belt tension).
Axial Cam
Force
Pulley
Faces
Belt
Tension
Force
Pulley Shaft
Motor Shaft
Springs
When a Hi-Lo Pulley is mounted on a
motor shaft, the pulley shaft, with the cam
housing attached, becomes integral with
the motor shaft. The sliding pulley faces,
however, are free to move axially and
rotate until the cam followers, due to the
effective belt tension, contact the cams.
When the belt tension requirement
increases, the cam followers rotate up the
helical cam ramp causing additional axial
pressure between the faces and the belt.
The belt is consequently gripped tighter
and the increased load can be transmitted
without slippage or loss of pitch diameter
setting. When the belt tension requirement
decreases, there is an opposite reaction
and the axial force is reduced.
The cam mechanism also provides peripheral support to the pulley faces and
reduces pressure and wear on the sliding
face bearing surfaces. The necessity of
torque carrying keys in the pulley shaft and
slide face are also eliminated and full
bearing surface area contact is achieved.
6
Charts and Power Formulas For Designing Drives
A review of the derivation of rotating horsepower and
the relationship of torque will be helpful in designing
and understanding the power transmission capabilities
and limitations of variable speed pulley drives.
Te
T1
Motor
Rotation
R
Hi-Lo Pulley
Driven
Sheave
r
d
D
Where:
Te = Effective Belt Tension or Force or Belt Pull
d = Variable Speed Pulley Pitch Diameter (in.)
r = Variable speed Pulley Pitch Radius (in.)
D = Driven Sheave Pitch Diameter (in.)
R = Driven Sheave Pitch Radius (in.)
T = Torque = Te x r or Te x R
HP = Horsepower
RPM = Revolutions Per Minute
One HP equals 33,000 ft-lbs of work per minute; the
power required to lift 33,000 pounds one foot in one
minute.
The FORCE (Te) which originates from the prime
mover or motor is applied through the belt at the
sheave pitch diameter.
The Distance that the Force travels in one minute
equals the circumference of the sheave at the belt
diameter times the sheave RPM.
By definition, WORK is force operating over a distance and POWER is the rate at which work is done.
Power = Force x Distance
Time
T2
Formula 1: HP =
Formula 2: T =
(
)
Te x 2πR x RPM
12
33,000
=
Distance (in feet) = 2πR x RPM
12
Te x R x RPM
63,025
=
T x RPM
63,025
HP x 63,025
RPM
Table 1 Conditional service factors for drive selection
Operating Hours Per Day
Service Environment
0–8
8–16
16–24
NORMAL DUTY: Where infrequent starting and peak loads do not exceed 160% of normal running load
1.00
1.10
1.30
MODERATE DUTY: Where occasional starting and peak loads do not exceed 250% of normal running loads
1.20
1.30
1.35
HEAVY DUTY: Where occasional starting and peak loads are in excess of 250% of normal running loads
OR where starting loads, peak loads and overloads occur frequently
1.25
1.35
1.50
The service factors are important in selecting a variable speed pulley that will provide adequate service life.
Multiply the maximum running torque or horsepower of the drive by the appropriate service factor to determine the proper capacity Hi-Lo Pulley.
Table 2 Starting torque characteristics of various machines
Torque
% of Running Torque
Types of Machines
Motor requirements
Breakaway torque
Breakaway torque
Breakaway torque
120% to 130%
130% to 160%
160% to 250%
General machines with ball or roller bearings.
General machines with sleeve bearings.
Conveyors and machines with excessive sliding friction.
Standard motor
Standard motor
Standard motor or possible
high-torque or oversize motor
Breakaway torque
250% to 600%
Machines that have “high” load spots in their cycle, like
some printing and punch presses, and machines with
cam or crank-operated mechanisms.
Standard, high-torque or possible
oversize motors
High-inertia
starting torque
Nominal rating of motor
will depend on the
starting requirements.
Machines with flywheels or other heavy rotating masses.
Also, some machines that move large masses by cranks,
centrifuges, etc.
Motor rating will depend on the time
required to bring load up to speed.
High torque, high slip.
Table 3 Load types and their relation to drive selection
HP and Torque Characteristics
Application Examples
Adjustable Speed Selection
Metal-cutting tools operating over wide speed range.
Power for 2/3 of HP at minimum speed.
Some extruders, mixers, special machines
where operation at low speed may be continuous.
Power for full HP at minimum speed.
Constant torque. HP varies as the speed.
General machinery, hoists, conveyors, printing
presses, etc., represents 90% of applications.
Power for HP at maximum speed. If replacing
a constant-speed drive, be sure to calculate
hp at new maximum speed.
Squared exponential. HP varies as square of
speed. Torque varies as the speed.
Positive displacement pumps, or some mixers,
some extruders.
Power for maximum HP at maximum speed.
Set upper limit speed stop.
Cubed exponential. HP varies as cube
of speed. Torque varies as square of speed.
All centrifugal pumps, some fans & blowers.
Note: Blower & fan power may vary as the fifth
power of speed.
Power for maximum HP at maximum
Speed. Set upper limit speed stop.
High-inertia loads.
Machines using flywheels to supply most of
the operation energy. Punch presses, power
shears, press brakes, etc.
General rules: Punch presses
(a) 1 HP per 10 tons rated size.
(b) If HP at maximum speed is known, select
belt for maximum HP at 1/3 of maximum
speed, whichever is the smaller.
Constant HP. Torque varies inversely at speed.
7
Horsepower Ratings and Selection Guide
Adjustable Center Distance Hi-Lo Pulleys are constant torque
devices that are HP rated at the maximum output speed of the
driven shaft. The TORQUE at the driven shaft is constant from
maximum RPM to minimum RPM. The HORSEPOWER output of
the driven shaft will decrease in direct proportion to the decrease
in RPM at the driven shaft.
Example:
The HP rating of an 8.75” max. pitch diameter; 2.90”
min. pitch diameter adjustable pulley is 5.00. The
driven shaft pitch diameter is 11.6”. The driver is a
1750 RPM 5.00 HP electric motor.
Formula Terms
Dr = Driver Sheave Pitch Diameter (P.D.)
Dm = Driven Sheave Pitch Diameter (P.D.)
C1 = Max. RPM Center Distance
C2
N1
N2
L
=
=
=
=
Adjustable Center Distance Drives
Driven RPM =
Dr x Driver RPM
Dn
HP Output at
Driven Shaft
Formula 1
Max. = 8.75 x 1750 = 1320
11.60
Min. = 2.90 x 1750 = 438
11.60
Min. RPM Center Distance
Driver Shaft RPM
Driven Shaft RPM
Belt Pitch Length
Dr
Step 1. Determine the horsepower requirement
On a constant torque drive, the required horsepower capacity of
the variable speed pulley and the motor is determined at the
maximum RPM of the driven shaft.
HP = Torque x RPM = 210 x 1300 = 4.33
63025
63025
Required HP= Drive HP x Service Factor (see page 6)
example
= 4.33 X 1.1 = 4.76
Step 5.
= 1300 = 2.89
450
Determine the Hi-Lo Pulley Model
From the drive system’s HP and Speed Range Ratio requirements a
model 1590 Hi-Lo Pulley can be selected.
Horsepower
Max. P.D.
Min. P.D.
Ratio Range
5.00
8.75”
2.90”
3:1
Step 4.
Determine Driven Sheave Diameter at
Max. RPM
Formula 3: N2(max.)= Dr x N1
Dn
example
Determine Recommended Center Distance
example
C1 =
11.75 + 3(8.75)
= 19.0
2
Step 6. Determine the Belt Pitch Length
The belt pitch length is calculated when the drive is at its
maximum speed position
2
L = 2C1 + 1.57(Dn + Dr) + (Dn - Dr)
4C1
Formula 5:
2
example: L = 2 x 19.0 + 1.57(11.75 + 8.75) + (11.75 - 8.75) = 70.30
4 x 19.0
From the pulley specification tables; the model 1590 uses the
2322V series of variable speed belts. From the variable speed belt
tables, you will note that the closest standard pitch length is 70.1
Determine the Speed Range Ratio
Model 1590 Specifications:
C1 = Max. RPM Center Distance
Formula 4: C1 = Dn +2 3(Dr) or C1 = Dn (whichever is greater)
Step 7.
Step 3.
Dn
C1 = Min. RPM Center Distance
A conveyor requires an input speed range of 450–1300 RPM and
has a maximum running torque requirement of 210 in.-lbs.
throughout the speed range. The specified driver is a 1750 RPM
electric motor. The drive is considered normal duty operating eight
to 16 hours per day.
N2max.
N2min.
1.66 x 63025 = 239
438
Dr
Drive Selection Example
Speed Range Ratio =
239 x 438 = 1.66
63025
The Catalog Ratings cover service factors up to 1.2. For higher
service factors, multiply the running horsepower by the appropriate
factor (see next page) and select an adequately rated pulley.
Driver Shaft
Travel
Step 2.
5.00
Torque output at
Driven Shaft (in.-lbs.)
Formula 2
5.00 x 63025 = 239
1320
Dn = N1___ x Dr(max.) = 1750 x 8.75 = 11.72
1300
N2(max.)
Determine the actual Center Distance
Formula 6: C1 = 0.5
C1 = 0.5
[
[
]
2
L - 1.57(Dn + Dr) - (Dn - Dr)
L
]
2
70.1 - 1.57(11.75 + 8.75) - (11.75 - 8.75) = 18.9
70.1
From the pre-engineered selection tables for the model 1590 pulley; Where the center distance numbers under the 2322V701 belt
column intersects the 23W12SK sheave line, the center distance is
18.9”.
Step 8.
Determine the proper size Hi-Lo Adjustable Motor Base
Refer to the motor base selection table on page 20. This table indicates the model base that can be used with each standard NEMA
motor frame.
Closest Standard Hi-Lo Companion Sheave is 23W12SK with
11.75 P.D.
From the catalog pre-engineered drive selection tables, you will
find that a model 1590 with a 23WSK12 Sheave has a speed range
of 434 RPM to 1303 RPM with a 1750 RPM driver.
continued on next page
8
Motor & Motor Base
Belt
Center
Length
Driven Sheave
Min. RPM & Pitch
Diameter Position
Face
Diameter
Max. RPM & Pitch
Diameter Position
Hi-Lo Pulleys are not recommended for drives
that are reversed without coming to a full stop.
Drive Selection Worksheet
In order to select an adjustable center distance
drive system you need to know or determine:
1. The horsepower or running torque requirement of the drive. Hi-Lo Pulleys are rated in
the catalog in conjunction with the rating of
1750 RPM and 1150 RPM electric motors.
2. The Service Factor of the drive. See charts
below and on page 6 to determine other
conditions that may affect drive selection.
3. The Diameters of the driver shaft and driven
shaft.
4
The RPM of the driver shaft.
5. The required RPM Range or Speed Range
Ratio (Max. RPM/Min. RPM) of the driven
shaft.
6. The model Hi-Lo Pulley to be used, considering the Horsepower and Speed Range
Ratio requirement of the drive.
7. The Driven Sheave Diameter after selecting
the appropriate Hi-Lo pulley.
8. The Center Distance between the shafts at
the maximum RPM position.
9. The Length of the Belt to be used in conjunction with the selected Hi-Lo Pulley,
Driven Sheave and Center Distance.
10. The Size of the Adjustable Motor Base considering the selected Motor Frame Size and
Hi-Lo Pulley’s shaft center distance adjustment.
Table 1: Service Factors for Hi-Lo Pulleys
Operating Hours Per Day
Service Environment
0–8
8–16
16–24
NORMAL DUTY: Where infrequent starting and peak loads do not exceed 160% of normal running load
1.00
1.10
1.30
MODERATE DUTY: Where occasional starting and peak loads do not exceed 250% of normal running loads
1.20
1.30
1.35
HEAVY DUTY: Where occasional starting and peak loads are in excess of 250% of normal running loads
OR where starting loads, peak loads and overloads occur frequently
1.25
1.35
1.50
The service factors are important in selecting a variable speed pulley that will provide adequate service life.
Multiply the maximum running torque or horsepower of the drive by the appropriate service factor to determine the proper capacity Hi-Lo Pulley.
9
Adjustable Center Distance Drives
All dimensions are in inches
Rated
HP
Pitch
Ratio
Single Face Moveable
.75
2:1
1
2.5:1
1
3.4:1
1.5
2.7:1
2
2.5: 1
3
2.5:1
5
2:1
5
1.6:1
Series
Model
30 TBR
40 TBR
40TBR-W
50 TBR
57-20 TBR
57 TBR
66 TBR
86 TBR
Double Face Moveable
1
2.3:1
DCV 140
1.5
2.5:1
DCV 150
1.5
3:1
DCW 1160
2
2.2:1
DCV 157-20
3
2.2:1
DCV 157
3
3:1
DCW 1270
5
2.5:1
DCV 167
5
3:1
DCW 1590
10
3:1
DCW 1711
20
2.5:1
DCW 2011
30
3:1
DCW 2513
Max. Pitch Min. Pitch
Belt
Diameter Diameter. Center
Length
Face
Diameter
Belt
Size
Stock Bore
Sizes
3.13
4.00
4.00
4.65
5.40
5.40
6.20
8.28
1.57
1.60
1.13
1.72
2.16
2.16
3.10
5.17
.78
.78
.78
.78
.78
1.09
1.09
1.09
2.69
2.69
2.69
3.19
3.06
3.88
3.88
3.88
3.38
4.25
4.25
5.00
5.75
5.75
6.63
8.63
A
A
A
B
B
B
B
B
.5•.625•.75
.5•.625•.75
.5
.5•.625•.75•.875
.5•.625•.75•.875
.75•.875•.625•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
3.75
4.70
5.90
5.40
5.40
7.28
6.50
8.75
10.70
10.65
12.60
1.63
1.88
1.98
2.45
2.45
2.42
2.60
2.90
3.57
4.26
4.20
2.19
2.19
2.19
2.19
2.50
2.87
2.88
3.53
4.33
4.88
4.88
4.38
4.38
4.38
4.38
4.94
5.88
5.88
7.06
8.66
9.75
9.75
4.00
5.00
6.13
5.75
5.75
7.50
6.88
9.00
11.00
11.00
13.00
A
B
1422V
B
B
1922
B
2322V
3226V
3230HV
4430V
.5•.625•.75•.875
.5•.625•.75•.875
.625•.75•.875
.5•.625•.75•.875
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
1•1.125•1.25•1.375
1•1.125•1.25•1.375
1.375•1.625•1.875
1.375•1.625•1.875
Two Groove/Belt
5
2:1
7.5 1.75:1
DCV 257
DCV 265
5.40
6.50
2.70
3.70
3.13
3.75
6.38
7.53
5.75
7.00
B (two)
C (two)
.75•.875•1•1.125
1•1.125•1.25•1.375
Asymmetric
5
3:1
10
3:1
20
2.5:1
30
2.3:1
A96
A 112
A 112-33
A130-33
9.30
10.80
10.70
12.40
3.10
3.60
4.30
5.40
1.82
2.32
2.27
2.52
6.56
7.25
7.44
7.44
9.69
11.25
11.25
13.00
23A
26A
33A
33A
Collet No. 512
Collet No. 512
Collet No. 512
Collet No. 7713
To calculate the speed range of a Hi-Lo Variable Speed Pulley and a
Companion Sheave, simply multiply the Motor Speed x Maximum Pitch
Diameter of the Variable Speed Pulley, then divide that by the Pitch
Diameter of the Driven Sheave. This gives you the Maximum RPM.
One shaft is fixed and the other is
moveable. The variable speed pulley
is normally mounted on the
moveable shaft and a fixed diameter
sheave on the stationary shaft. By
using an adjustable motor base,
speed variation of the driven shaft is
accomplished by mechanically
changing the center distance
between the shafts. An increase in
center distance will pull the belt to a
smaller diameter in the variable
speed pulley. This increases the
drive ratio and reduces the driven
shaft RPM. A decrease in center
distance allows the spring-loaded
pulley faces to close and push the
belt to a larger diameter.
Divide this by the Pitch Ratio to find the Minimum RPM.
Example: DCW 1160 / 14W7 w/1750 motor: (1750 x 5.9) ÷ 6.8 =
1518 max RPM / 3 = 506 min RPM
Motor & Motor Base
Belt
Center
Length
Driven Sheave
Min. RPM & Pitch
Diameter Position
Face
Diameter
Max. RPM & Pitch
Diameter Position
10
TBR Series Adjustable Center Distance Drives
continued on next page
Drive Features
One Face Movable Design provides a simplified, economical and
trouble free drive system. While belt misalignment is inherent, it is
minimal using standard V-belts. The drive should be aligned with
the belt at the mean diameter of the variable pulley and the
recommended shaft center distance used as a minimum.
Aluminum Alloy Pulley Faces are light weight, corrosion resistant
and have a high wearability compatibility between the belt and face
surface. The model 86TBR uses close grained cast iron faces.
Permanent Lubrication. High load carrying precisely fit bronze
bushings with specially formulated oil impregnation eliminate most
fretting and corrosion problems.
Torque Sensing Design. Recognized by belt manufacturers as the
ultimate in providing drive efficiency and drive component life.
Dimensions and Specifications • TBR Series
H P Rating
1750 1150
RPM RPM
.75
1
1
1.5
2
3
5
5
.5
.75
.75
1
1.5
2
3
3
Torque
Capacity
1 lb.-in.
Model
Number
Max.
P.D.
27
36
36
54
72
108
180
180
30TBR
40TBR
40TBR-W
50TBR
57-20TBR
57TBR
66TBR
86TBR
3.13
4.00
4.00
4.65
5.40
5.40
6.20
8.28
Min.
P.D.
1.57
1.60
1.125
1.72
2.16
2.16
3.10
5.17
Ratio
2:1
2.5:1
3.4:1
2.7:1
2.5:1
2.5:1
2:1
1.6:1
All dimensions are in inches
Belt
Size
A
A
A
B
B
B
B
B
A
B
3.38
4.25
4.25
5.00
5.75
5.75
6.63
8.63
2.69
2.69
2.69
3.06
3.06
3.88
3.88
3.88
C
D
E
F
G
.78
.78
.78
.78
.78
1.09
1.09
1.09
.97
.97
.97
1.01
1.01
1.33
1.33
1.33
1.69
1.69
1.69
2.00
2.00
2.44
2.31
2.44
1.88
1.88
1.88
1.88
1.88
2.25
2.25
2.25
3.06
3.06
3.06
4.06
4.06
5.07
5.07
5.07
Stock Thru Bores
.5•.625•.75
.5•.625•.75
.5•.625
.5•.625•.75• .875
.5•.625•.75• .875
.625•.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
HP Ratings and Torque Capacities are at the Maximum P.D.
B
P.D. (Driven)
Driven Torque= –––––––––––– x Torque Capacity (Driver)
Max P.D. (Driver)
C
Horsepower Curve (1750 RPM Input)
86TBR
66TBR
HORSEPOWER AT DRIVEN SHAFT
5.0
4.5
4.0
3.5
57TBR
3.0
A
2.5
2.0
57-20TBR
1.5
50TBR
1.0
40TBR
30TBR
0.5
30
40
50
60
70
80
% OF MAXIMUM DRIVEN RPM
90
E
F
G
100
D
11
Pre-Engineered Belt and Center Distance Selection Chart • TBR Series
Driver
Pulley
Model
30TBR
40TBR
Driver
Pulley
Model
50TBR
57TBR
57-20
TBR
66TBR
86TBR
P.D.
Driven
Sheave
3.2
3.8
4.4
5.0
5.6
6.2
7.0
8.2
9.0
10.6
3.2
3.8
4.4
5.0
5.6
6.2
7.0
8.2
9.0
10.6
Driven Speed
1750RPM 1150RPM
Motor
Motor
Min. Max. Min. Max.
853 1712 561 1125
718 1441 472 947
621 1245 408 818
546 1096 359 720
488 978 320 643
440 884 289 581
690 783 256 514
333 668 219 439
303 609 199 400
258 517 169 340
875 2188 575 1438
737 1842 484 1211
636 1591 418 1046
560 1400 368 920
500 1250 329 821
452 1129 297 742
400 1000 263 657
342 854 224 561
311 778 204 511
264 660 174 434
Driven Speed
P.D.
1750RPM 1150RPM
Driven
Motor
Motor
Sheave Min. Max. Min. Max.
4.0
726 2034 477 1336
4.6
631 1769 415 1162
5.0
581 1628 382 1069
5.6
519 1453 341 954
6.2
469 1313 308 863
6.8
427 1197 281 786
7.4
393 1100 258 722
8.0
363 1017 239 668
9.4
309 866 203 569
11.0
264 740 174 431
5.2
740 1817 487 1164
5.6
688 1688 452 1109
6.2
621 1524 408 1002
6.8
566 1390 372 913
7.4
520 1277 342 839
8.0
481 1181 316 776
9.4
410 1005 269 661
11.0
350 859 230 565
12.4
311 762 204 501
13.6
283 695 186 457
5.6
969 1938 637 1274
6.2
875 1750 575 1150
6.8
798 1596 524 1114
7.4
733 1466 482 964
8.0
678 1356 446 891
9.4
577 1154 379 758
11.0
493 986 324 648
12.4
438 875 288 573
13.6
399 798 262 524
15.4
352 705 232 463
7.4 1223 1958 803 1287
8.0 1131 1811 743 1190
8.6 1052 1685 691 1107
9.4
963 1542 633 1013
11.0
823 1317 541 866
12.4
730 1169 480 768
13.6
665 1065 437 700
15.4
588 941 386 618
Shaft Center Distance (Max. RPM Position)
A Section Belt Sizes
A35
A37
A39
A41
A43
A45
A26
A31
A33
8.7
8.2
7.7
7.2
6.7
11.2
10.7
10.2
9.6
9.2
8.8
8.0
12.2
11.7
11.2
10.7
10.2
9.7
9.0
7.9
13.2
12.7
12.2
11.7
11.2
10.7
10.0
8.9
8.2
14.2
13.7
13.2
12.7
12.2
11.7
11.0
9.9
9.2
8.0
7.5
7.0
6.6
6.1
10.5
10.0
9.6
9.1
8.6
8.1
11.5
11.0
10.6
10.1
9.6
9.1
8.4
12.5
12.0
11.6
11.1
10.6
10.1
9.4
8.3
13.5
13.0
12.6
12.1
11.6
11.1
10.4
9.4
8.6
B35
B38
B42
11.6
11.1
10.8
10.3
9.9
9.4
8.8
8.3
13.1
12.6
12.4
11.8
11.4
10.9
10.4
9.8
15.1
14.6
14.3
13.8
13.4
12.9
12.4
11.8
10.6
10.1
9.8
9.3
8.8
8.3
11.6
11.3
10.8
10.3
9.8
9.3
9.1
8.7
8.2
7.7
All dimensions are in inches
15.2
14.7
14.2
13.7
13.2
12.7
12.0
11.0
10.2
8.7
14.5
14.0
13.6
13.1
12.6
12.1
11.4
10.4
9.6
16.2
15.7
15.2
14.7
14.2
13.7
13.0
12.0
11.2
9.7
15.5
15.0
14.6
14.1
13.6
13.1
12.4
11.4
40.7
9.2
17.2
16.7
16.2
15.7
15.2
14.7
14.0
13.0
12.2
10.7
16.5
16.0
15.6
15.1
14.6
14.1
13.4
12.4
11.7
10.2
18.2
17.7
17.2
16.7
16.2
15.7
15.0
14.0
13.2
11.8
17.5
17.0
16.6
16.1
15.6
15.1
14.4
13.4
12.7
11.2
Shaft Center Distance (Max. RPM Position)
B Section Belt Sizes
B46 B48
B50
B53
B56
B60
13.6
13.3
12.8
12.3
11.8
11.3
10.1
17.1
16.6
16.3
15.8
15.4
14.9
14.4
13.9
12.6
11.2
15.6
15.3
14.8
14.3
13.8
13.3
12.1
18.1
17.6
17.3
16.8
16.4
15.9
15.4
14.9
13.6
12.2
16.6
16.3
15.8
15.3
14.8
14.3
13.1
11.7
19.1
18.6
18.3
17.9
17.4
16.9
16.4
15.9
14.7
13.2
17.6
17.3
16.8
16.3
15.8
15.3
14.1
12.7
20.6
20.1
19.8
19.4
18.9
18.4
17.9
17.4
16.2
14.8
19.0
18.8
18.3
17.8
17.3
16.8
15.6
14.2
22.1
21.6
21.3
20.9
20.4
19.9
19.4
18.9
17.7
16.3
20.6
20.3
19.8
19.3
18.8
18.3
17.1
15.8
13.0
10.6
10.2
9.7
9.2
8.7
12.6
12.2
11.7
11.2
10.7
9.5
14.6
14.2
13.7
13.2
12.7
11.6
15.6
15.2
14.7
14.2
13.7
12.6
11.2
16.6
16.2
15.7
15.2
14.7
13.6
12.2
18.1
17.7
17.2
16.7
16.2
15.1
13.7
12.5
19.6
19.2
18.7
18.2
17.7
16.6
15.2
14.0
7.6
9.6
9.1
11.6
11.1
10.7
10.0
12.6
12.1
11.7
11.0
13.6
13.1
12.7
12.0
15.2
14.6
14.2
13.5
12.2
16.6
16.1
15.7
15.0
13.7
12.5
24.1
23.6
23.3
22.9
22.4
21.9
21.4
20.9
19.7
18.3
22.6
22.3
21.8
21.3
20.8
20.3
19.2
17.8
16.5
15.4
21.6
21.2
20.7
20.2
19.7
18.6
17.2
16.0
14.9
18.6
18.1
17.7
17.0
15.7
14.5
13.5
A47
A49
A53
A56
19.2
18.7
18.2
17.7
17.2
16.7
16.0
15.0
14.3
12.8
18.5
18.0
17.6
17.1
16.6
16.1
15.4
14.4
13.7
12.2
20.2
19.7
19.2
18.7
18.2
17.7
17.0
16.0
15.3
13.8
19.5
19.0
18.6
18.1
17.6
17.1
16.4
15.4
14.7
13.3
22.2
21.7
21.2
20.7
20.2
19.7
19.0
18.0
17.3
15.9
21.5
21.0
20.6
20.1
19.7
19.1
18.4
17.4
16.7
15.3
23.7
23.2
22.7
22.2
21.7
21.2
20.6
19.5
18.8
17.4
23.0
22.5
22.1
21.6
21.1
20.6
19.9
18.9
18.2
16.8
B64
B68
B71
B75
26.0
25.6
25.3
24.9
24.4
23.9
23.4
22.9
21.7
20.3
24.6
24.3
23.8
23.3
22.8
22.3
21.2
19.8
18.6
17.5
23.6
23.2
22.7
22.2
21.7
20.6
19.2
18.0
16.9
15.3
20.6
20.1
19.7
19.0
17.7
16.5
15.5
28.8
27.6
27.3
26.9
26.4
25.9
25.4
24.9
23.7
22.3
26.6
26.3
25.8
25.3
24.8
24.3
23.2
21.8
20.6
19.5
25.6
25.2
24.7
24.2
23.7
22.6
21.2
20.0
19.0
17.3
22.6
22.1
21.7
21.0
19.7
18.5
17.5
16.0
29.6
29.1
28.8
28.4
27.9
27.4
26.9
26.4
25.2
23.8
28.1
27.8
27.3
26.8
26.3
25.8
24.7
23.3
22.1
21.0
27.1
26.7
26.2
25.7
25.2
24.1
22.7
21.5
20.5
18.9
24.1
23.6
23.2
22.5
21.2
20.1
19.0
17.5
31.6
31.1
30.8
30.3
29.9
29.4
28.9
28.4
27.2
25.9
30.1
29.8
29.3
28.8
28.3
27.8
26.7
25.3
24.1
23.1
29.1
28.7
28.2
27.7
27.2
26.1
24.8
23.6
22.5
20.9
26.1
25.6
25.2
24.5
23.2
22.1
22.1
19.5
12
DCV Series Adjustable Center Distance Drives
continued on next page
Drive Features
Two Face Movable Design (for standard V-belts)
Maintains belt alignment between the variable speed pulley and the companion
sheave. This is an important feature with close center distance drives. Models 257 and
265 are an exception, however, and should use recommended shaft center distances.
Pulley Face Material
Models 140, 150 and 157 use a lightweight, corrosion-resistant, aluminum alloy
material. Models 167, 257 and 265 use close-grained, cast-iron faces.
Permanently Lubricated Movable Face Bushings
High load carrying, precisely fit bronze bushings with a specially formulated oil
impregnation are used to eliminate most fretting and corrosion problems. For severe
corrosion conditions, the pulley shaft can be treated to resist the particular corrosion
condition.
Torque Sensing Design
Belt tension is regulated to the load requirements. Bushing wear is reduced by the
peripheral support of the cam followers. There are no torque carrying keys.
Dimensions and Specifications • DCV Series
HP Rating
Torque
1750
1150 Capacity
RPM
RPM 1 lb.-in.
1
1.5
2
3
5
5
7.5
.75
1
1.5
2
3
3
5
36
54
72
108
180
180
270
Model
Number
Max.
P.D.
Min.
P.D.
Ratio
DCV140
DCV150
DCV157-20
DCV157
DCV167
DCV257
DCV265
3.75
4.70
5.40
5.40
6.50
5.40
6.50
1.63
1.88
2.45
2.45
2.60
2.70
3.70
2.3:1
2.5:1
2.2:1
2.2:1
2.5:1
2.0:1
1.75:1
All dimensions are in inches
Belt
Size
A
B
C
D
E
F
Stock
Bores
G
Shaft
Travel
(inches)
A
B
B
B
B
B
C
4.00
5.00
5.75
5.75
6.88
5.75
7.00
4.38
4.38
4.38
4.94
5.88
6.38
7.53
2.19
2.19
2.19
2.50
2.88
3.13
3.75
2.25
2.25
2.25
2.75
3.25
3.50
4.50
1.88
2.00
2.00
2.25
2.25
2.25
3.88
4.06
4.06
4.06
5.07
5.07
5.07
6.56
.5•.625•.75•.875
.5•.625•.75•.875
.5•.625•.75•.875
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
1•1.125•1.25•1.375
1.6
2.1
2.2
2.2
2.8
2.2
2.1
HP Ratings and Torque Capacities are at the Maximum P.D.
P.D. (Driven Sheave)
Driven Torque Capacity = –––––––––––––––––– x Torque Capacity (Driver)
Max P.D. (Driver)
C
Models
DCV140
DCV150
DCV157
DCV157-20
DCV167
B
Horsepower Curve
(1750 RPM Input)
DCV265
8.0
A
F
G
HORSEPOWER AT DRIVEN SHAFT
7.0
E
6.0
DCV255
DCV167
5.0
D
4.0
B
C
DCV157-30
3.0
DCV157-20
2.0
DCV150
A
DCV140
1.0
0
40
E
G
50
60
70
80
% OF DRIVEN RPM
90
100
Models
DCV257,
DCV265
D
F
13
Pre-Engineered Belt and Center Distance Selection Chart • DCV Series
Driven Speeds
Driver
P.D.
Pulley Driven
Model Sheave
140
3.2
3.8
4.4
5.0
5.6
6.2
7.0
8.2
9.0
10.6
1750 RPM
Motor
Min.
Max.
892
751
649
571
510
408
408
348
317
269
2051
1727
1492
1313
1172
1059
938
800
729
619
1150 RP
Motor
Min.
Max.
586
493
426
375
335
302
268
229
208
177
1348
1135
980
863
770
696
616
526
479
407
A Section Belt Sizes
A26
A31
A33
A35
A37
A39
A41
A43
A45
A47
A49
A53
A56
8.2
7.7
7.2
6.8
6.3
10.7
10.2
9.7
9.3
8.8
8.3
11.7
11.2
10.7
10.3
8.9
9.3
8.6
12.7
12.2
11.7
11.3
10.8
10.6
9.6
13.7
13.2
12.7
12.3
11.8
11.3
10.3
9.6
14.7
14.2
13.7
13.3
12.8
12.3
11.6
10.6
15.7
15.2
14.7
14.3
13.8
13.3
12.6
11.6
10.8
16.7
16.2
15.7
15.3
14.8
14.3
13.6
12.6
11.8
17.7
17.2
16.7
16.3
15.8
15.3
14.6
13.6
12.8
11.4
18.7
18.2
17.7
17.3
16.8
16.3
15.6
14.6
13.9
12.4
19.7
19.2
18.7
18.3
17.8
17.3
16.6
15.6
14.9
13.4
21.7
21.2
20.7
20.3
19.8
19.3
18.6
17.6
16.9
15.5
23.2
22.7
22.2
21.8
21.3
20.8
20.1
19.1
18.4
17.0
Driven Speeds
Driver
P.D.
Pulley Driven
Model Sheave
150
157-20
157
167
257
1750 RPM
Motor
Min.
Max.
Shaft Center Distance (Max. RPM Position)
1150 RP
Motor
Min.
Max.
B Section Belt Sizes
B35
B38
B42
B46
B48
B50
B53
B56
B60
B64
B68
B71
B75
4.0
4.6
5.0
5.6
6.2
6.8
7.4
8.0
9.4
11.0
822
715
633
588
531
484
445
411
350
299
2056
1778
1645
1469
1327
1210
1112
1028
875
747
541
470
416
386
349
318
292
270
230
197
1351
1175
1081
965
871
795
730
676
575
491
11.6
11.1
10.8
10.3
9.9
9.4
8.8
13.1
12.6
12.3
11.8
11.4
10.9
10.4
9.8
15.1
14.6
14.3
13.8
13.4
12.9
12.4
11.8
10.6
17.1
16.6
16.3
15.8
15.4
14.9
14.4
13.9
12.6
18.1
17.6
17.3
16.8
16.4
15.9
15.4
14.9
13.6
12.2
19.1
18.6
18.3
17.9
17.4
16.9
16.4
15.9
14.7
13.2
20.6
20.1
19.8
19.4
18.9
18.4
17.9
17.4
16.2
14.8
22.1
21.6
21.3
20.9
20.4
19.9
19.4
18.9
17.7
16.3
24.1
23.6
23.3
22.9
22.4
21.9
21.4
20.9
19.7
18.3
26.0
25.6
25.3
24.9
24.4
23.9
23.4
22.9
21.7
20.3
28.8
27.6
27.3
26.9
26.4
25.9
25.4
24.9
23.7
22.3
29.6
29.1
28.8
28.4
27.9
27.4
26.9
26.4
25.2
23.8
31.6
31.1
30.8
30.3
29.9
29.4
28.9
28.4
27.2
25.9
5.2
5.6
6.2
6.8
7.4
8.0
9.4
11.0
12.6
13.6
826
767
693
632
581
537
457
391
346
316
1817
1688
1524
1390
1277
1181
1005
859
762
695
543
504
455
415
381
353
300
257
228
208
1194
1109
1002
913
839
776
661
565
501
457
10.1
9.8
9.3
8.8
8.3
11.6
11.3
10.8
10.3
9.8
9.3
13.6
13.3
12.8
12.3
11.8
11.3
10.1
15.6
15.3
14.8
14.3
13.8
13.3
12.1
16.6
16.3
15.8
15.3
14.8
14.3
13.1
11.7
17.6
17.3
16.8
16.3
15.8
15.3
14.1
12.7
19.0
18.8
18.3
17.8
17.3
16.8
15.6
14.2
20.6
20.3
19.8
19.3
18.8
18.3
17.1
15.8
13.0
22.6
22.3
21.8
21.3
20.8
20.3
19.2
17.8
16.5
15.4
24.6
24.3
23.8
23.6
22.8
22.3
21.2
19.8
18.6
17.5
26.6
26.3
25.8
25.2
24.8
24.3
23.2
21.8
20.6
19.5
28.1
27.8
27.3
26.8
26.3
25.8
24.7
23.3
22.1
21.0
30.1
29.8
29.3
28.8
28.3
27.8
26.7
25.3
24.1
23.1
5.6
6.2
6.8
7.4
8.0
9.4
11.0
12.4
13.6
15.4
812
734
669
615
569
484
414
367
335
296
2031
1835
1673
1537
1422
1210
1034
917
836
739
534
482
440
404
374
318
272
241
220
194
1335
1206
1099
1010
934
795
680
603
550
485
8.9
10.4
9.9
9.5
9.0
12.4
11.9
11.5
11.0
10.5
14.4
13.9
13.5
13.0
12.5
11.3
15.4
14.9
14.5
14.0
13.5
12.3
16.4
15.9
15.5
15.0
14.5
13.3
12.0
17.9
17.4
17.0
16.5
16.0
14.8
13.5
19.4
18.9
18.5
18.0
17.5
16.3
15.0
13.8
21.4
20.9
20.5
20.0
19.5
18.4
17.0
15.8
14.7
23.4
22.9
22.5
22.0
21.5
20.4
19.0
17.8
16.7
25.4
24.9
24.5
24.0
23.5
22.4
21.0
19.8
18.8
17.1
26.9
26.4
26.0
25.5
25.0
23.9
22.5
21.3
20.3
18.7
28.9
28.4
28.0
26.5
27.0
25.9
24.5
23.3
22.3
20.7
5.2
5.6
6.2
6.8
7.4
8.0
9.4
11.0
12.6
13.6
865
804
729
662
608
562
479
409
363
331
1817
1688
1524
1390
1277
1181
1005
859
762
695
569
528
477
435
400
370
315
269
239
217
1194
1109
1002
913
839
776
661
565
501
457
10.1
9.8
9.3
8.8
8.3
11.6
11.3
10.8
10.3
9.8
9.3
13.6
13.3
12.8
12.3
11.8
11.3
10.1
15.6
15.3
14.8
14.3
13.8
13.3
12.1
16.6
16.3
15.8
15.3
14.8
14.3
13.1
11.7
17.6
17.3
16.8
16.3
15.8
15.3
14.1
12.7
19.0
18.8
18.3
17.8
17.3
16.8
15.6
14.2
20.6
20.3
19.8
19.3
18.8
18.3
17.1
15.8
13.0
22.6
22.3
21.8
21.3
20.8
20.0
19.2
17.8
16.5
15.4
24.6
24.3
23.8
23.3
22.8
22.3
21.2
19.8
18.6
17.5
26.6
26.3
25.8
25.3
24.8
24.3
23.2
21.8
20.6
19.5
28.1
27.8
27.3
26.8
26.3
25.8
24.7
23.3
22.1
21.0
30.1
29.8
29.3
28.8
28.3
27.8
26.7
25.3
24.1
23.1
Driven Speeds
Driver
P.D.
Pulley Driven
Model Sheave
257
All dimensions are in inches
Shaft Center Distance (Max. RPM Position)
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
16.0
1750 RPM
Motor
Min.
Max.
929
813
722
650
591
542
500
464
406
1625
1422
1264
1138
1034
948
875
813
711
Shaft Center Distance (Max. RPM Position)
1150 RP
Motor
Min.
Max.
610
534
474
427
388
356
329
305
267
1068
934
831
748
680
623
575
534
467
C Section Belt Sizes
C51
C55
C60
C68
C72
C75
C78
C81
C85
C90
C96
C100
101
15.9
15.0
14.2
13.4
12.5
18.4
17.5
16.7
15.9
15.0
14.2
13.3
20.9
20.0
19.2
18.4
17.6
16.7
15.8
14.9
24.9
24.1
23.2
22.4
21.6
20.7
19.8
19.0
17.2
26.9
26.1
25.2
24.4
23.6
22.7
21.9
21.0
19.2
28.4
27.6
26.7
25.9
25.1
24.2
23.4
22.5
20.7
29.9
29.1
28.2
27.4
26.6
25.7
24.9
24.0
22.2
31.4
30.6
29.7
28.9
28.1
27.2
26.4
25.5
23.7
33.4
32.6
31.7
30.9
30.1
29.3
28.4
27.5
25.8
35.9
35.1
34.2
33.4
32.6
31.8
30.9
30.1
28.3
38.9
38.1
37.3
36.4
35.6
34.8
33.9
33.1
31.3
40.9
40.1
39.3
38.4
37.6
36.8
35.9
35.1
33.3
41.4
40.6
39.8
38.9
38.1
37.3
36.4
35.6
33.9
14
DCW Series Adjustable Center Distance Drives
continued on next page
Drive Features
Two Face Moveable Design for variable speed belts
Maintains belt alignment between the variable speed pulley and the companion sheave.
The wider variable speed belts allow a greater speed ratio change than standard V-belts,
while maintaining a match between the included angle of the pulley faces and the belt.
Pulley Face Material
Models 1160 and 1270 use a lightweight, corrosion-resistant aluminum alloy material.
Models 1590, 1711, 2011 and 2513 use close-grained, cast-iron faces.
Permanently Lubricated Moveable Face Bushings
High load carrying precisely fit bronze bushings with a specially formulated oil impregnation are used to eliminate most fretting and corrosion problems. For severe corrosion
conditions the pulley shafts can be treated to resist the particular corrosion condition.
Torque-Sensing Design
Belt tension is regulated to the load requirements. Bushing wear is reduced by the
peripheral support of the cam followers. There are no torque carrying keys.
Dimensions and Specifications • DCW Series
HP Rating
1750
1150
RPM
RPM
1.5
1
Torque
Capacity
1 lb.-in.
54
Model
Number
Max.
P.D.
Min.
P.D.
Ratio
1160
5.90
1.98
3:1
All dimensions are in inches
Belt
Size
1422V
A
B
C
D
E
F
6.13
4.38
2.19
2.25
1.88
4.06
Stock
Bores
G
Shaft
Travel
(inches)
.625•.75•.875
2.90
3
2
108
1270
7.28
2.42
3:1
1922V
7.50
5.88
2.87
3.25
2.25
5.07
.75•.875•1•1.125
3.40
5
3
180
1590
8.75
2.90
3:1
2322V
9.00
7.06
3.53
3.87
4.25
7.13
.875•1•1.125,
1.25•1.375
4.30
10
7.5
360
1711
10.70
3.57
3:1
3226V
20
15
720
2011
10.65
4.26
30
20
1080
2513
12.60
4.20
2.5:1 3230HV
3:1
4430V
11.00
8.66
4.33
4.50
4.25
7.13
1.125•1.25•1.375
5.00
11.00
9.75
4.88
4.62
4.25
7.13
1.375•1.625•1.875
4.60
13.00
9.75
4.88
4.62
4.25
7.13
1.375•1.625•1.875
5.90
P.D. (Driven Sheave)
Driven Torque Capacity = –––––––––––––––––– x Torque Capacity (Driver)
Max. P.D. (Driver)
HP Ratings and Torque Capacities are at the Maximum P.D.
Horsepower Curve • 1750 RPM Input
32.0
DCW2513
B
HORSEPOWER AT DRIVEN SHAFT
28.0
C
24.0
DCW2011
20.0
A
F
16.0
G
E
12.0
DCW1711
8.0
DCW1590
4.0
DCW1270
DCW1160
0
30
40
50
60
70
80
% OF DRIVEN RPM
90
100
D
(1.375
5,1.87
15
Pre-Engineered Belt and Center Distance Selection Chart • DCW Series
Driver
Pulley
Model
1160
Driver
Pulley
Model
1270
Driver
Pulley
Model
1590
Driver
Pulley
Model
1711
Driver
Pulley
Model
2011
Driver
Pulley
Model
2513
Driven
Sheave
No.
14W5.5SH
14W6SH
14W7SH
14W8SH
14W9SH
14W10SH
14W11SH
14W12SH
14W14SH
P.D.
5.3
5.8
6.8
7.8
8.8
9.8
10.8
11.8
13.8
1750
Min.
649
563
506
441
391
351
319
292
249
Driven
RPM
Max.
1948
1780
1518
1324
1173
1054
956
875
748
Speeds
1150 RPM
Min.
Max
427
1280
390
1170
333
998
290
870
257
771
231
692
209
628
192
575
164
492
P.D.
6.78
7.78
8.78
9.78
11.78
13.78
15.78
1750
Min.
599
517
458
412
342
292
255
Driven
RPM
Max.
1781
1552
1375
1235
1025
876
765
Speeds
1150 RPM
Min.
Max.
390
1170
340
1020
301
904
270
811
225
674
192
576
168
503
Driven
RPM
Max.
2269
1976
1750
1571
1303
1114
972
Speeds
1150
Min.
497
433
383
344
286
244
213
RPM
Max.
1491
1298
1150
1032
856
732
639
441
P.D.
6.75
7.75
8.75
9.75
11.75
13.75
15.75
1750
Min.
756
659
583
524
434
371
324
Driven
RPM
Max.
1950
1854
1687
1548
1429
1328
1240
1163
1035
932
Speeds
1150
Min.
427
406
370
339
313
291
272
255
227
204
RPM
Max.
1282
1218
1109
1017
939
873
815
764
680
612
514
P.D.
9.6
10.1
11.1
12.1
13.1
14.1
15.1
16.1
18.1
20.1
1750
Min.
650
618
562
516
477
443
413
388
345
311
Driven
RPM
Max.
1962
1864
1694
1553
1434
1331
1243
1165
1035
932
Speeds
1150
Min.
516
490
445
408
377
350
327
306
272
245
RPM
Max.
1289
1225
1113
1021
942
875
817
766
680
612
603
P.D.
9.5
10.0
11.0
12.0
13.0
14.0
15.0
16.0
18.0
20.0
1750
Min.
785
746
678
621
574
533
497
466
414
373
P.D.
10.0
11.0
12.0
13.0
15.0
17.0
18.0
20.0
22.0
24.0
1750
Min.
735
668
613
565
490
432
408
368
334
306
Driven
RPM
Max.
2205
2004
1838
1696
1470
1297
1225
1103
1002
919
Speeds
1150
Min.
483
439
403
372
322
284
268
242
220
201
RPM
Max.
1449
1317
1208
1115
966
852
805
725
659
603
Driven
Sheave
No.
19W7SK
19W8SK
19W9SK
19W10SK
19W12SK
19W14SK
19W16SK
Driven
Sheave
No.
23W7SK
23W8SK
23W9SK
23W10SK
23W12SK
23W14SK
23W16SK
Driven
Sheave
No.
32W99SF
32W104SF
32W114SF
32W124SF
32W134SF
32W144SF
32W154SF
32W164SF
32W184SF
32W204SF
Driven
Sheave
No.
32W99SF
32W104SF
32W114SF
32W124SF
32W134SF
32W144SF
32W154SF
32W164SF
32W184SF
32W204SF
Driven
Sheave
No.
44W10SF
44W11SF
44W12SF
44W13SF
44W15SF
44W17SF
44W18SF
44W20SF
44W22SF
44W24SF
300
6.2
403
9.4
8.6
9.8
Belt Size 1422V • Shaft Center Distance (Max. RPM Position)
340 360 400
440
460 480
540 600
660
720
8.2
7.8
30.2
29.8
28.9
28.2
27.4
26.6
25.7
24.9
23.1
Belt Size 1922V • Shaft Center Distance (Max. RPM Position)
426 454 484
526
544 604 646 686
721
751
806
10.6
9.8
670
15.7
15.0
14.2
9.2
8.8
7.9
17.8
17.1
16.3
15.5
13.9
19.5
18.7
17.9
17.0
15.3
13.6
18.2
17.8
16.9
16.2
15.4
14.6
13.7
12.8
18.9
18.1
17.3
16.5
14.9
13.2
21.6
20.8
20.0
19.1
17.5
15.7
21.2
20.8
19.9
19.2
18.4
17.6
16.7
15.8
20.9
20.1
19.3
18.5
16.9
15.2
13.4
23.6
22.8
22.0
21.1
19.5
17.7
15.9
24.2
23.6
22.9
22.2
21.4
20.6
19.7
18.8
17.1
801
14.8
14.1
13.3
12.5
16.5
15.7
14.9
14.0
12.3
15.2
14.8
13.9
13.2
12.4
11.6
Belt Size 2322V • Shaft Center Distance (Max. RPM Position)
461 481 521
541
601 621 661 681
701
721
13.8
13.1
12.3
11.5
15.6
14.8
14.0
13.1
14.2
13.8
12.9
12.2
11.4
10.6
29.6
28.8
28.0
27.2
25.5
23.8
22.0
11.8
11.1
10.3
13.5
12.7
11.9
11.0
13.2
12.8
11.9
11.2
10.4
26.8
26.0
25.2
24.4
22.7
21.0
19.2
10.8
10.1
12.0
11.2
10.4
11.2
10.8
9.9
9.2
780
27.2
26.8
25.9
25.2
24.4
23.6
22.7
21.9
20.1
21.9
21.1
20.3
19.5
17.9
16.2
14.5
25.3
24.5
23.7
22.9
21.2
19.5
17.7
22.9
22.1
21.3
20.5
18.9
17.2
15.5
23.9
23.1
22.3
21.5
19.9
18.2
16.5
27.9
27.1
26.3
25.5
23.9
22.2
20.5
Belt Size 3226V • Shaft Center Distance (Max. RPM Position)
545 585 603
663
723 783 843 903
963 1023 1083
11.3
14.3
13.9
13.2
All dimensions are in inches
35.2
34.8
34.0
33.2
32.4
31.6
30.8
30.0
28.3
26.5
38.2
37.8
37.0
36.2
35.4
34.6
33.8
33.0
31.3
29.6
Belt Size 3230V • Shaft Center Distance (Max. RPM Position)
620 644 656
670
685 702 723 821
856
931
960
15.1
14.7
14.0
13.2
13.3
12.9
12.1
16.3
15.9
15.2
14.4
13.6
14.2
13.8
13.0
12.2
16.9
16.5
15.8
15.0
14.2
17.2
16.8
16.0
15.2
14.4
17.6
17.2
16.5
15.7
14.9
14.1
20.2
19.8
19.0
18.2
17.4
16.6
15.8
14.9
18.4
18.0
17.3
16.5
15.6
14.8
23.2
22.8
22.0
21.2
20.4
19.6
18.8
17.9
16.2
19.2
18.8
18.1
17.3
16.5
15.7
14.8
26.2
25.8
25.0
24.2
23.4
22.6
21.8
20.9
19.2
17.4
20.3
19.9
19.2
18.4
17.5
16.7
15.9
15.0
29.2
28.8
28.0
27.2
26.4
25.6
24.8
24.0
22.2
20.5
25.2
24.8
24.1
23.3
22.5
21.6
20.8
20.0
18.2
16.5
32.2
31.8
31.0
30.2
29.4
28.6
27.8
27.0
25.3
23.5
26.9
26.5
25.8
25.0
24.2
23.4
22.6
21.7
20.2
18.2
30.7
30.3
29.6
28.8
28.0
27.1
26.3
25.5
23.8
22.0
32.1
31.7
31.0
30.2
29.4
28.6
27.8
26.9
25.2
23.5
Belt Size 4430V • Shaft Center Distance (Max. RPM Position)
718 730 740
767
790 850 910 970 1030 1090 1150
18.1
17.4
16.6
15.8
18.7
18.0
17.2
16.4
19.2
18.5
17.7
16.9
15.3
20.6
19.8
19.0
18.3
16.6
21.7
21.0
20.2
19.4
17.8
16.1
24.7
24.0
23.2
22.4
20.8
19.2
18.3
27.7
27.0
26.2
25.4
23.8
22.2
21.3
19.6
17.9
30.7
30.0
29.2
28.4
26.8
25.2
24.3
22.6
20.9
19.1
33.7
33.0
32.2
31.4
29.8
28.2
27.3
25.3
23.9
22.1
36.7
36.0
35.2
34.4
32.8
31.2
30.3
28.7
26.9
25.2
39.7
39.0
38.2
37.4
35.8
34.2
33.4
31.7
30.0
28.2
16
A Series, Asymmetric Adjustable Center Distance Drives
continued on next page
• LOW OVERHUNG LOAD ON BEARINGS
The nearly perpendicular angle of the fixed
pulley face locates the point of bending
moment close to mounting shaft bearings.
The peripheral support of the cam and cam
follower torque sensing mechanism also
reduces wear on the sliding face bearing
surface. Use of interchangeable collet
bushings eliminates side wobble and
vibration due to bad fits between motor
spindle and pulley shaft.
Instead of two identically angled V-shaped
belt faces, Asymmetric Variable Speed
pulleys pair a V-angled face with a nearly
flat (2º) fixed face. The resulting design
produces some important features
• STABLE BELT CENTER LINE
As the fixed pulley face is nearly
perpendicular, the belt center line
movement throughout the entire pitch
diameter range is negligible. Belt alignment
with the driven sheave is maintained and
crosswise wear on belts is reduced.
• AUTOMATIC BELT TENSIONING
Incorporated in the automatic variable
speed pulleys is Hi-Lo’s exclusive belt
tensioning device. The cam and cam
follower mechanism adjusts belt tension to
the load requirement and stabilizes the pitch
diameter setting regardless of load
fluctuations.
• DESIGN SIMPLICITY AND LONGEVITY
The reduction of parts in the single sliding
face design minimizes the possibility of a
crucial breakdown and simplifies repairs and
replacement of parts.
Dimensions & Specifications • A Series
HP Rating
1750
1150
RPM
RPM
5
10
20
30
3
7.5
15
20
All dimensions are in inches
Torque
Capacity
lb.-in.
Model
Number
Max.
P.D.
Min.
P.D.
Ratio
Change
Belt
Size
A
B
C
D
E
F
*Collet
Size
Shaft
Travel
180
360
720
1080
A96
A112
A112-33
A130-33
9.30
10.80
10.70
12.40
3.10
3.60
4.30
5.40
3:1
3:1
2.5:1
2.3:1
23A
26A
33A
33A
9.69
11.25
11.25
13.0
6.56
7.25
7.44
7.44
1.82
2.32
2.27
2.52
3.88
4.75
4.75
5.19
4.38
4.38
4.38
4.38
7.13
7.13
7.13
7.13
512
512
7713
7713
4.3
5.0
4.6
4.9
P.D. (Driven Sheave)
Driven Torque Capacity= –––––––––––––––––– x Torque Capacity (Driver)
Max. P.D. (Driver)
HP Ratings and Torque Capacities are at the Maximum P.D.
Horsepower Curve (1750 RPM Input)
32
A130-33
C
HORSEPOWER AT DRIVEN SHAFT
28
24
A112-33
20
A
16
E
12
A112
8
.75
A96
4
D
B
30
40
50
60
70
% OF DRIVEN RPM
80
90
100
F
17
Pre-Engineered Belt and Center Distance Selection Chart •A Series
Driver
Pulley
Model
Driven
Sheave
No.
P.D.
Driven
Sheave
23A80
23A94
23A110
23A124
23A136
23A154
7.95
9.35
10.95
12.35
13.55
15.45
Driven
Sheave
No.
P.D.
Driven
Sheave
26A97
26A107
26A117
26A137
26A157
26A177
9.7
10.7
11.7
13.7
15.7
17.7
Driver
Pulley
Model
Driven
Sheave
No.
P.D.
Driven
Sheave
A112-33
33A97
33A107
33A117
33A137
33A157
33A177
33A197
9.7
10.7
11.7
13.7
15.7
17.7
19.7
Driver
Pulley
Model
Driven
Sheave
No.
P.D.
Driven
Sheave
33A107
33A117
33A137
33A157
33A177
33A197
10.7
11.7
13.7
15.7
17.7
19.7
A96
Driver
Pulley
Model
A112
A130-33
Driven RPM
1750 RPM
Motor
Min. Max.
682
580
495
439
400
351
2046
1741
1486
1318
1201
1053
Driven RPM
1750 RPM
Motor
Min. Max.
650
589
539
460
402
356
1948
1766
1615
1379
1203
1067
Driven RPM
1750 RPM
Motor
Min. Max.
772
700
640
547
477
424
382
1930
1750
1600
1366
1192
1057
950
Driven RPM
1750 RPM
Motor
Min. Max.
883
806
689
601
533
479
2028
1854
1583
1382
1225
1100
Driven RPM
1150 RPM
Motor
Min. Max.
448
381
326
289
263
231
427
387
354
302
264
234
1332
1218
1040
908
805
729
11.0
14.0
12.9
11.6
15.9
14.9
13.6
12.4
17.9
16.9
15.6
14.4
13.4
19.9
18.8
17.5
16.4
15.4
13.8
21.9
20.8
19.5
18.4
17.4
15.8
25.8
24.7
23.4
22.3
21.3
19.8
Belt Section 26A Pitch Lengths (in MM and Inches)
MM ➤ 1400 1500 1600 1800 1900 2000 2120 2400 2600
70.9
74.8 78.7 83.5
94.5 102.4
Inches ➤ 55.1 59.1 63.0
Shaft
CenterDistance:
Distance: Maximum
Position
(in inches)
Shaft
Center
MaximumRPM
RPM
Position
(in inches)
11.4
MM ➤
Inches ➤
13.4
12.7
11.9
15.4
14.6
13.8
19.4
18.6
17.8
16.2
21.3
20.5
19.7
18.1
16.4
23.3
22.5
21.7
20.1
18.4
16.7
25.7
24.9
24.1
22.5
20.8
19.1
31.2
30.4
29.6
28.0
26.3
24.6
35.1
34.3
33.5
31.9
30.2
28.5
Belt Section 33A Pitch Lengths (in MM and Inches)
1500 1600 1800 1900 2000 2120 2400 2600
59.1 63.0
70.9
74.8 78.7 83.5
94.5 102.4
Shaft
CenterDistance:
Distance: Maximum
Position
(in inches)
Shaft
Center
MaximumRPM
RPM
Position
(in inches)
1268
1150
1051
898
783
695
630
Driven RPM
1150 RPM
Motor
Min. Max.
580
530
453
395
351
317
9.7
1280
1160
1061
906
791
701
Driven RPM
1150 RPM
Motor
Min. Max.
508
460
421
360
314
278
254
Belt Section 23A Pitch Lengths (in MM and Inches)
MM ➤ 1180 1250 1400 1500 1600 1700 1800 2000
59.0
63.0 66.9 70.9
78.7
Inches ➤ 46.5 49.2 55.1
Shaft
CenterDistance:
Distance: Maximum
Position
(in inches)
Shaft
Center
MaximumRPM
RPM
Position
(in inches)
1345
1141
977
866
789
692
Driven RPM
1150 RPM
Motor
Min. Max.
All dimensions are in inches
13.5
12.8
12.0
15.5
14.7
13.9
12.3
19.4
18.7
17.9
16.2
14.5
21.4
20.7
19.9
18.2
16.5
23.3
22.6
21.8
20.1
18.4
16.7
25.7
25.0
24.2
22.5
20.8
19.1
17.4
31.2
30.5
29.7
28.0
26.3
24.6
22.9
35.2
34.5
33.7
32.0
30.3
28.6
26.9
Belt Section 33A Pitch Lengths (in MM and Inches)
MM ➤ 1600 1700 1800 1900 2000 2120 2300 2500 2800
74.8
78.7 83.5 90.6
98.4 110.2
Inches ➤ 63.0 66.9 70.9
Shaft
CenterDistance:
Distance: Maximum
Position
(in inches)
Shaft
Center
MaximumRPM
RPM
Position
(in inches)
13.3
15.3
14.5
17.3
16.5
15.0
19.3
18.5
17.0
15.3
21.1
20.4
18.9
17.2
23.6
22.8
21.3
19.6
18.0
27.2
26.4
24.9
23.2
21.5
19.8
31.1
30.3
28.8
27.1
25.4
23.7
37.0
36.2
34.7
33.0
31.3
29.7
18
Belts
Hi-Lo Variable Speed Belts are design coordinated so all belt elements
perform as a unit to provide maximum efficiency and long service.
Arched construction and a crush-resistant compression section of fiberreinforced synthetic rubber gives MAXIMUM CROSSWISE RIGIDITY.
Synthetic fiber tension cords give DIMENSIONAL LENGTH STABILITY.
Synthetic rubber compounds provide high HEAT and OIL RESISTANT
qualities. Electrical conductive material is compounded into the cover
for STATIC DISSIPATING.
Industry Standard Numbering System
The first two numbers indicate the belt top width in
sixteenths of an inch. The third and fourth numbers
indicate the included angle of the groove in which
the belt is designed to operate. The numbers after
the “V” indicate the pitch length of the belt to the
nearest one-tenth of an inch. For example: A
2322V721 belt has a 1.44” (17/16) top width, is
designed to operate in a sheave with a 22° included
angle and has a 72.1” pitch length.
Belt
No.
1422V 240
1422V 270
1422V 290
1422V 300
1422V 330
1422V 340
1422V 360
1422V 400
1422V 420
1422V 440
1422V 460
1422V 466
1422V 470
1422V 480
1422V 540
1422V 600
1422V 660
1422V 720
1422V 780
1922V 302
1922V 321
1922V 332
1922V 338
1922V 363
1922V 381
1922V 386
1922V 403
1922V 417
1922V 426
1922V 443
1922V 454
1922V 460
1922V 484
1922V 526
1922V 544
1922V 604
1922V 630
1922V 646
Pitch
Length
1422V
24.0
27.0
29.0
30.0
33.0
34.0
36.0
40.0
42.0
44.0
46.0
46.6
47.0
48.0
54.0
60.0
66.0
72.0
78.0
1922V
30.2
32.1
33.2
33.8
36.3
38.1
38.6
40.3
41.7
42.6
44.3
45.4
46.0
48.4
52.6
54.4
60.4
63.0
64.6
WT
lbs.
0.30
0.30
0.30
0.30
0.40
0.40
0.40
0.50
0.50
0.50
0.50
0.50
0.50
0.50
0.65
0.70
0.70
0.80
0.90
0.60
0.60
0.60
0.60
0.70
0.70
0.70
0.70
0.80
0.80
0.80
0.80
0.80
0.90
1.00
1.00
1.10
1.10
1.20
Belt
No.
1922V 666
1922V 686
1922V 706
1922V 721
1922V 726
1922V 751
1922V 756
1922V 806
1922V 846
1922V 891
1922V 966
1922V 1146
Pitch
Length
66.6
68.6
70.6
72.1
72.6
75.1
75.6
80.6
84.6
89.1
96.6
114.6
2322V
2322V 364
36.4
2322V 384
38.4
2322V 421
42.1
2322V 434
43.4
2322V 441
44.1
2322V 461
46.1
2322V 481
48.1
2322V 521
52.1
2322V 541
54.1
2322V 601
60.1
2322V 621
62.1
2322V 661
66.1
2322V 681
68.1
2322V 701
70.1
2322V 721
72.1
2322V 801
80.1
2322V 826
82.6
2322V 846
84.6
2322V 886
88.6
2322V 921
92.1
2322V 1001
100.1
2322V 1061
106.1
2322V 1301
130.1
Belt Cross Section
1422V
bb(in.)
hb (in.)
.88
.31
1922V
2322V
3226V
3230HV
4430V
1.19
.38
1.44
.44
2.00
.53
2.00
.62
2.75
.69
bb
hb
WT
lbs.
1.20
1.20
1.30
1.30
1.30
1.40
1.40
2.50
1.50
1.60
1.70
2.10
1.00
1.00
1.10
1.20
1.20
1.25
1.30
1.40
1.40
1.60
1.60
1.70
1.80
1.80
1.90
2.10
2.20
2.20
2.30
2.30
2.60
2.80
3.40
Belt
No.
Pitch
Length
3226V
40.0
45.0
46.5
50.5
51.4
54.5
58.5
60.3
65.0
66.3
72.3
78.3
84.3
90.3
96.3
102.3
108.3
3230HV
3230HV 528
52.8
3230HV 553
55.3
3230HV 570
57.0
3230HV 585
58.5
3230HV 603
60.3
3230HV 613
61.3
3230HV 620
62.0
3230HV 626
62.6
3230HV 644
64.4
3230HV 670
67.0
3230HV 685
68.5
3230HV 702
70.2
3230HV 723
72.3
3230HV 821
82.1
3230HV 856
85.6
3230HV 931
93.1
3230HV 960
96.0
4430V
4430V 510
51.0
4430V 530
53.0
4430V 548
54.8
3226V 400
3226V 450
3226V 465
3226V 505
3226V 514
3226V 545
3226V 585
3226V 603
3226V 650
3226V 663
3226V 723
3226V 783
3226V 843
3226V 903
3226V 963
3226V 1023
3226V 1083
WT
lbs.
1.70
1.95
2.00
2.20
2.20
2.60
2.50
2.60
2.70
2.80
3.10
3.30
3.60
3.90
4.10
4.40
4.60
2.60
2.80
2.90
2.90
3.00
3.10
3.10
3.10
3.20
3.40
3.50
3.50
3.60
4.00
4.25
4.60
4.75
3.70
3.90
3.90
Belt
No.
4430V 555
4430V 560
4430V 570
4430V 578
4430V 600
4430V 610
4430V 630
4430V 652
4430V 660
4430V 670
4430V 690
4430V 700
4430V 710
4430V 718
4430V 730
4430V 740
4430V 750
4430V 760
4430V 780
4430V 790
4430V 800
4430V 850
4430V 900
4430V 910
4430V 930
4430V 950
4430V 970
4430V 1000
4430V 1030
4430V 1060
4430V 1090
4430V 1120
4430V 1150
4430V 1180
4430V 1250
4430V 1320
4430V 1410
4430V 1460
4430V 1610
4430V 1810
Pitch
Length
55.5
56.0
57.0
57.8
60.0
61.0
63.0
65.2
66.0
67.0
69.0
70.0
71.0
71.8
73.0
74.0
75.0
76.0
78.0
79.0
80.0
85.0
90.0
91.0
93.0
95.0
97.0
100.0
103.0
106.0
109.0
112.0
115.0
118.0
125.0
132.0
141.0
146.0
161.0
181.0
WT
lbs.
4.00
4.00
4.10
4.10
4.30
4.40
4.50
4.70
4.70
4.80
4.90
5.00
5.10
5.10
5.20
5.30
5.30
5.40
5.50
5.60
6.00
6.00
6.40
6.50
6.60
6.70
6.90
7.10
7.30
7.50
7.70
7.90
8.10
8.40
8.90
9.30
10.00
10.30
11.40
12.60
19
V-Belt Sheaves
E
F
O.D.
P.D.
Hi-Lo Companion Sheaves
are made of close-grained
cast iron, accurately
machined to conform to
industry standards and
balanced for true running
operation. The sheaves are
made to accommodate QD
Bushings for ease of
installation.
For 1422V-Belts
.875” Top Width
Bushing Size: SH
F = 1.125” E = .281”
Sheave
O.D.
P.D.
No.
in.
in.
For 1922V Belts
1.19” Top Width
Bushing Size: SK
F = 1.438” E = .531”
Sheave
O.D.
P.D.
No.
in.
in.
For 2322V-Belts
1.44” Top Width
Bushing Size: SK
F = 1.688” E = .406”
Sheave
O.D.
P.D.
No.
in.
in.
For 3226/3230V Belts
2” Top Width
Bushing Size: SF
F = 2.375” E = 0”
Sheave
O.D.
P.D.
No.
in.
in.
For 4430V-Belts
2.75” Top Width
Bushing Size: SF
F = 3.125” E = .188”
Sheave
O.D.
P.D.
No.
in.
in.
14W5.5
14W6
14W7
14W8
14W9
14W10
14W11
14W12
14W14
19W7
19W8
19W9
19W10
19W12
19W14
19W16
23W7
23W8
23W9
23W10
23W12
23W14
23W16
32W84
32W99
32W104
32W114
32W124
32W134
32W144
32W164
32W184
32W204
44W10
44W11
44W12
44W13
44W15
44W17
44W18
44W20
44W22
44W24
5.5
6.0
7.0
8.0
9.0
10.0
11.0
12.0
14.0
5.3
5.8
6.8
7.8
8.8
9.8
10.8
11.8
13.8
7.0
8.0
9.0
10.0
12.0
14.0
16.0
6.78
7.78
8.78
9.78
11.78
13.78
15.78
7.0
8.0
9.0
10.0
12.0
14.0
16.0
L
Torque
Capacity
(in.-lbs.)
Wrench
Torque
(ft.-lbs.)
A
B
1,000
3,500
5,000
5,000
7,000
11,000
5
9
9
9
15
30
.313
.375
.438
.438
.5
.5
1.375
1.871
2.1875
2.1875
2.8125
3.125
Bush.
F
JA
Torque Ratings and Dimensions
JA
SH
SDS
SD
SK
SF
10.4
11.4
12.4
13.4
15.4
17.4
18.4
20.4
22.4
24.4
10
11
12
13
15
17
18
20
22
24
Bushing Keyseat
Dimensions
A
G
Bushing
8.1
9.5
10.1
11.1
12.1
13.1
14.1
16.1
18.1
20.1
B
D
Bushings
8.4
9.9
10.4
11.4
12.4
13.4
14.4
16.4
18.4
20.4
Taper 3/4” in 12”
on diameter
E
lt
Bo cle
Cir
6.75
7.75
8.75
9.75
11.75
13.75
15.75
All dimensions are in inches
D
E
F
G
2
.688 .563 .125
2.688 .875 .813 .125
3.188 .875 .75 .125
3.188 1.375 1.25 .125
3.875 1.375 1.25 .125
4.625 1.5 1.25 .125
L
1
1.25
.313
1.813
1.875
2
Bolt
Circle
Cap
Screws
Required
1.656
(3) #10x1
2.25 (3).25x1.375
2.688 (3).25x1.375
2.688 (3).25x1.875
3.313
(3).375X2
3.875
(3).375X2
Weight
Lbs.
.8
1.0
1.2
1.5
2.0
3.5
SH
SDS
SD
Standard Keyseat Dimensions
Shaft
Diameter
Width
Depth
Shaft
Diameter
Width
Depth
Shaft
Diameter
Width
Depth
.313–.438
.5–.563
.625–-.875
.937–1.25
1.313–1.375
.094
.125
.188
.25
.313
.047
.063
.094
.125
.156
1.438–1.75
1.813–2.25
2.313–2.75
2.813–3.75
3.313–3.75
.375
.5
.625
.75
.875
.188
.25
.313
.375
.438
3.813–4.5
4.563–5.5
5.563–6.5
6.563–7.5
7.563-9
1
1.25
1.5
1.75
2
.5
.625
.75
.75
.75
SK
SF
Bores*
.5-1
1.062-1.19
1.25
.5x1.375
1.44-1.675
1.69
.5-1.69
1.75
1.81
1.875-1.94
2
.5-2.13
1.75
1.81
1.875-1.94
2
.5-2.13
2.19-2.25
2.31-2.5
2.56-2.675
.5-2.25
2.31-2.5
2.56-2.75
2.81-2.94
Keyseat
Standard
.25x.06
.25x.03
Standard
.375x.06
No.K.S.
Standard
.375x.125
.5 x.125
.5x.06
No.K.S.
Standard
.375x.125
.5 x.125
.5x.06
No K.S.
Standard
.5x.125
.675x.06
No. KS.
Standard
.675x.19
.675x.06
No. K.S.
20
Collet Bushings
Draw-bolt
D
C
Belleville washer
A
8°
E (thread)
Collet washer
B
Collet Bushings
All dimensions are in inches
Collet
No.
7707
508
510
512
7713
Standard Bore Sizes (Inches)
.5, .625, .75, .875
.625, .75, .875, 1, 1.125
.75, .875, 1, 1.125, 1.25, 1.375
1, 1.125, 1.25, 1.375, 1.5, 1.625
1.375, 1.5, 1.625, 1.875
Motor Bases
continued on next page
Hi-Lo Motor Bases for Adjustable Center Distance Drives
have been designed to accommodate NEMA motor frame
sizes 48 through 286T, with rigid steel construction, and
lube free bushings in the motor mount plates for easy
adjustment and greater wearability on the 214, 254 &
284 models.
B
2.5
3
3.625
4
4.875
C
1
1.25
1.5
1.75
2.125
D
3.25
3.75
4.625
5
6.125
E
.325 – 16
.325 – 16
.5 – 13
.5 – 13
.625 – 11
Motor Base Selection
NEMA
Motor
Frame
Motor H.P.
at
No.
48
56
182
143T
184
145T
213
182T
215
184T
254U
213T
256U
215T
284U
254T
256T
284T
286T
1800 RPM 130
•
.25 thru .75 •
1
1
•
1.5 & 2
1.5 & 2
3
3
5
5
7.5
7.5
10
10
15
15
20
25
30
Hi-Lo Motor
Base Number
145
•
•
•
•
•
•
213
254
284
•
•
•
•
•
•
•
•
•
•
•
•
•
•
21
Models 130 and 145
Models 213, 254, and 284
This motor base is designed of steel parts in place of castings
to be compact, lighter in weight, greater in strength and rigidly,
and lower in cost. Can be mounted in any position.
Models #213 and #254 are designed with oversize slide rod rails and
oil-impregnated bronze bearings for large bearing area and lubricated
sliding surfaces. The bearings are self-aligning for ease of operation.
Dimensions
DIMENSION
F
G
H
MOTOR
BASE No.
A
B
C
D
E
130
145
213
254
284
11
161⁄8
161⁄4
195⁄16
217⁄16
27⁄8
37⁄8
313⁄16
43⁄16
47⁄8
6
91⁄2
91⁄2
11
15
71⁄4
121⁄4
121⁄4
151⁄4
167⁄8
5
81⁄2
81⁄2
10
133⁄8
23⁄4
25⁄8
213⁄16
213⁄16
213⁄16
13⁄32
21⁄8
27⁄8
27⁄8
51⁄2
8
13⁄32
13⁄32
17⁄32
11⁄16
I
J
K
L
M
N
47⁄8
77⁄16
77⁄16
83⁄4
13
7⁄16
33⁄64
33⁄64
10
15
15
18
20
2
21⁄2
27⁄16
213⁄16
31⁄8
3
4
4
5
5
5⁄8-11
33⁄64
11⁄16
5⁄8-11
5⁄8-11
5⁄8-11
3⁄4-16
NEMA Foot-Mounted Motor
All dimensions are in inches
Length
Thickness
Key
Width
3⁄16
3⁄16
13⁄8
21⁄4
3⁄16
3⁄16
13⁄8
2
3⁄16
3⁄16
13⁄8
23⁄4
1⁄4
1⁄4
13⁄4
7⁄8
2
3⁄16
3⁄16
13⁄8
23⁄4
11⁄8
23⁄4
1⁄4
1⁄4
13⁄4
31⁄2
11⁄8
23⁄4
1⁄4
1⁄4
2
23⁄4
31⁄2
13⁄8
33⁄8
5⁄16
5⁄16
23⁄8
41⁄4
31⁄2
31⁄2
11⁄8
23⁄4
1⁄4
1⁄4
2
51⁄4
41⁄4
31⁄2
31⁄2
13⁄8
33⁄8
5⁄16
5⁄16
23⁄8
103⁄4
61⁄4
5
41⁄8
41⁄4
13⁄8
31⁄2
5⁄16
5⁄16
23⁄4
93⁄4
61⁄4
5
41⁄8
41⁄4
15⁄8
4
3⁄8
3⁄8
27⁄8
121⁄2
121⁄2
61⁄4
5
5
41⁄4
13⁄8
31⁄2
5⁄16
5⁄16
23⁄4
121⁄4
111⁄2
61⁄4
5
5
41⁄4
15⁄8
4
3⁄8
3⁄8
27⁄8
284U
14
121⁄2
7
51⁄2
43⁄4
43⁄4
15⁄8
45⁄8
3⁄8
3⁄8
33⁄4
284T
131⁄2
111⁄4
7
51⁄2
43⁄4
43⁄4
17⁄8
45⁄8
1⁄2
1⁄2
31⁄4
286U
14
14
7
51⁄2
51⁄2
43⁄4
15⁄8
45⁄8
3⁄8
3⁄8
33⁄4
286T
131⁄2
123⁄4
7
51⁄2
51⁄2
43⁄4
17⁄8
45⁄8
1⁄2
1⁄2
31⁄4
B
Min.
21⁄4
A
Max.
V
Min.
Frame
No.
Dimensions
D
E
F
BA
U
48
3
21⁄8
13⁄8
21⁄2
1⁄2
56
31⁄2
27⁄16
11⁄8
23⁄4
5⁄8
31⁄2
23⁄4
2
21⁄4
7⁄8
143T
7
413⁄16
145T
7
513⁄16
31⁄2
23⁄4
21⁄2
21⁄4
7⁄8
9
61⁄2
41⁄2
33⁄4
21⁄4
23⁄4
7⁄8
9
6
41⁄2
33⁄4
21⁄4
23⁄4
11⁄8
184
9
71⁄2
41⁄2
33⁄4
23⁄4
23⁄4
184T
9
63⁄8
41⁄2
33⁄4
23⁄4
213
101⁄2
71⁄2
51⁄4
41⁄4
23⁄4
213T
101⁄4
7
51⁄4
41⁄4
215
101⁄2
9
51⁄4
215T
101⁄4
81⁄2
254U
121⁄2
254T
121⁄4
256U
256T
182
182T
22
Asymmetric Variable Speed Pulleys
bb
hb
Instead of two identically angled V-shaped belt faces, Asymmetric
Variable Speed pulleys pair a V-angled face with a nearly flat (2º)
fixed face. The resulting design produces some important
features:
• STABLE BELT CENTER LINE:
As the fixed pulley face is nearly perpendicular, the belt center
line movement throughout the entire pitch diameter range is
negligible. Belt alignment with the driven sheave is maintained
and crosswise wear on belts is reduced.
• STABLE AND LOW OVERHUNG LOAD ON BEARINGS
The C-Flow configuration of Asymmetric Drives and the nearly
perpendicular angle of the fixed pulley face, locates the point of
bending moment close to mounting shaft bearings. The peripheral
support of the cam and cam follower torque sensing mechanism
also reduces wear on the sliding face bearing surface. Use of
interchangeable collet bushings eliminates side wobble and
vibration due to bad fits between motor spindle and pulley shaft.
• AUTOMATIC BELT TENSIONING
Incorporated in the automatic variable speed pulleys is Hi-Lo’s
exclusive belt tensioning device. The cam and cam follower
mechanism adjusts belt tension to the load requirement and
stabilizes the pitch diameter setting regardless of load
fluctuations.
• COMPACT AND SIMPLE
Asymmetric drives require a minimum of space in a C-Flow
configuration relative to their horsepower capacity. Installation
alignment can be checked simply by laying a straight edge along
the back of the fixed disks. The reduction of parts in the single
sliding face design minimizes the possibility of a critical
breakdown and simplifies repairs and replacement of parts.
Asymmetric Style
Conventional V-Belt Style
17˚
3˚
23
Asymmetric Sheaves & Belts
Cross
Section
23A
26A
33A
F
1.69
1.94
2.325
bg
+-.010
1.417
1.653
2.047
hg
Min.
.625
.875
1.000
Asymmetric Sheaves
Sheave
No.
23A80
23A94
23A110
23A124
23A136
23A154
O.D.
8.35
9.75
11.35
12.75
13.95
15.75
P.D.
7.95
9.35
10.95
12.35
13.55
15.35
E
+-.062
.41
.25
0
2a
.40
.47
.59
All dimensions are in inches
Bush.
SK
SK
SK
SK
SK
SK
Sheave
No.
26A87
26A97
26A107
26A117
26A137
26A157
26A177
O.D.
9.17
10.17
11.17
12.17
14.17
16.17
18.17
P.D.
8.7
9.7
10.7
11.7
13.7
15.7
17.7
Bush.
SF
SF
SF
SF
SF
SF
SF
Sheave
No.
33A97
33A107
33A117
33A137
33A157
33A177
O.D.
10.29
11.29
12.29
14.29
16.29
18.29
P.D.
9.7
10.7
11.7
13.7
15.7
17.7
Bush.
SF
SF
SF
SF
SF
SF
Cross Section Dimensions
bb
Section
23A
26A
33A
36A
MM
36
42
52
57
hb
IN.
1.417
1.654
2.047
2.244
MM
12
14
17
20
IN.
.472
.551
.630
.787
Asymmetric Belts
Belt
No.
23A1060
23A1100
23A1180
23A1250
23A1400
23A1500
23A1600
23A1700
23A1800
23A2000
Pitch Length
MM
1060
1100
1180
1250
1400
1500
1600
1700
1800
2000
In.
41.7
43.3
46.5
49.2
55.1
59.1
63.0
66.9
70.9
78.7
Belt
No.
26A1250
26A1300
26A1400
26A1500
26A1600
26A1750
26A1800
26A1900
26A2000
26A2120
26A2400
26A2500
26A2650
Pitch Length
MM
In.
1250
49.2
1300
51.2
1400
55.1
1500
59.1
1600
63.0
1750
68.9
1800
70.9
1900
74.8
2000
78.7
2120
83.5
2400
94.5
2500
98.4
2650
104.3
Belt
No.
33A1500
33A1600
33A1700
33A1750
33A1800
33A1900
33A2000
33A2120
33A2300
33A2400
33A2500
33A2650
33A2800
Pitch Length
MM
In.
1500
59.1
1600
63.0
1700
66.9
1750
68.9
1800
70.9
1900
74.8
2000
78.7
2120
83.5
2300
90.6
2400
94.5
2500
98.4
2650
104.3
2800
110.2
Belt
No.
36A1800
36A1900
36A2000
36A2120
36A2250
36A2400
36A2500
36A2600
36A2700
36A2800
36A3000
Pitch Length
MM
1800
1900
2000
2120
2250
2400
2500
2600
2700
2800
3000
In.
70.9
77.8
78.7
83.5
88.6
94.5
98.4
102.4
106.3
110.2
118.1
Save Your Inertia!
Hi-Lo FlySheave
smooths out your drive
Our robotically machined flywheel
with integrated poly v-belt sheave
and fan provides a perfectly
balanced component for your drive.
T
he Hi-Lo FlySheave is designed to improve the overall
balance of a motor, sheave, fan and flywheel drive
system. The difficulties of mounting separate components and maintaining system balance are dramatically
improved by combining the three parts into one perfectly
machined part:
• Robotic technology keeps our manufacturing and quality
control process absolutely consistent.
• Single point turning of the Poly V-Sheave grooves means
grooves remain smooth and consistent—reducing
vibration and prolonging belt life.
• Automated balancing equipment determines the exact
amount and location of any imbalance. FlySheaves are so
precisely balanced that they will out-perform typical
print specifications.
• Tool-life management system keeps cutting tools sharp
and assures precise machining.
With millions of our FlySheave in the field we are proud of
our zero-defect program. Consistency in material, tooling,
machining, and balancing will provide you with the exacting
quality that you need in your components.
For specifications, pricing or information on manufacturing
to your specifications, please call 800-373-2279.
If our stock designs don’t exactly match your needs,
use our technology and expertise to manufacture a
FlySheave to your custom specifications.
• Visit our Web site: www.hi-lo.com
• Call us toll free at 800-373-2279
Flywheel Sheaves, Variable Speed Pulley Drives
and Precise Power Transmission Manufacturing
1700-G Freeway Blvd. • Minneapolis, MN 55430
612-566-2510 • Fax 612-566-0562
info@hi-lo.com
12/18/99
25
Horsepower Ratings and Selection Guide
continued on next page
Fixed Center Distance Drives are horsepower rated at the
driven shaft when the drive is at a 1:1 ratio or when the
driven shaft is at the same RPM as the driver.
The HORSEPOWER output of the driven shaft will be
constant as the driven RPM increases from driver RPM to
maximum RPM and will decrease in direct proportion to
decreases in driven RPM from driver RPM.
Fixed Center Distance Drives
Dn Max.
Dr MIN
The TORQUE output of the driven shaft decreases in
inverse proportion to driven shaft RPM increases from
driver RPM and remains constant as the driven RPM
decreases.
C
Driven RPM =
Dr
x Driver RPM
Dn
Mean = 6.67 x 1750 = 1750
6.67
HP Output at
Driven Shaft
Formula 1
Torque Output at
Driven Shaft
Formula 2
5.00
5.00 x 63,025 = 180
1750
Max. =
8.75 x 1750 = 3448
4.44
94 x 3348 = 5.0
63,025
Min. =
2.25 x 1750 = 380
10.38
180 x 380 = 1.1
63,025
Dr MIN
Dn Max.
Example:
A MCW90 driver and 106TBR driven drive is rated at
5.00 H.P. at 1750 RPM. The maximum and minimum
pitch diameters of the driver pulley are 8.75” and 2.25”,
respectively. The maximum and minimum pitch
diameters of the driven pulley are 10.38” and 4.44”
respectively. The 1:1 ratio pitch diameter is 6.67”.
Dr
Dn
Dm
C
C2
N1
N2
=
=
=
=
=
=
=
Driver Pulley Pitch Diameter (P.D.)
Driven Pulley Pitch Diameter (P.D.)
Mean or 1-1 Pitch Diameter (P.D.)
Center Distance Between Shafts
Min. RPM Center Distance
Driver Shaft RPM
Driven Shaft RPM
5.00 x 63,025 = 94
3348
1.10 x 63,025 = 180
380
Drive Selection Example
A drive system requires driven shaft speeds of 400 RPM min. and
2400 RPM max. The torque requirement has been determined at
115 in.-lbs. throughout the speed range. The service is normal duty
operating up to 16 hours per day. The specified driver is a 1750
RPM electric motor.
Hi-Lo Pulleys are not recommended for
drives that are reversed without coming
to a full stop.
the available 3420 RPM would increase the HP requirement to
where a 5 HP motor could be burned out.
HP = 115 x 3420 = 6.24
63,025
Step 4. Determine the Recommended Center Distance
Step 1. Determine the Horsepower Requirement
The maximum HP requirement is determined at the maximum
driven RPM.
HP =
Torque x N2(max.) = 115 x 2400 = 4.38
63,025
63,025
Step 2. Apply the Drive Service Factor
Require HP Capacity = Service Factor x Drive HP
= 1.1 x 4.38 = 4.8
Step 3. Select Hi-Lo Pulley System
From the drive system’s HP and speed range requirements a
MCW90/106TBR drive can be used.
MCW90/106TBR Specifications:
Horsepower 5.0 at 1750 RPM, Speed Range 380-3420 RPM
In this case, the maximum RPM speed stop should be set at
approximately 2400 RPM. To increase the drive system’s speed to
C = Dn(max.) + 3Dr (max.) = 10 + 3(8.75) = 18
2
2
Step 5. Determine the Belt Size
From the pre-engineered belt and center distance selection tables
(page 29), note that the closest center distance to the recommended one is 16.6 inches and the belt size listed above is 2322V541.
To find the belt length with a known center distance
B.L. = 2C + 3.14Dm
To find the center distance with a known belt length
C = B.L. - 3.14Dm
2
The correct center distance for an available belt length is necessary
to obtain the full speed ratio of a Fixed Center Drive. Therefore,
some center distance adjustment is required to adjust for belt
length tolerances.
26
Min. RPM Position
Max. RPM Position
C-Flow
Dr Min.
Dr Max.
Dn Max.
Dr Min.
Z-Flow
Drive Selection Worksheet
In order to select a Fixed Center Distance Drive you
need to know and determine the following:
1. The horsepower or running torque
requirement of the equipment. Hi-Lo Pulleys
are rated in the catalog in conjunction with
the rating of 1750 RPM and 1150 RPM
electric motors.
5. The desired RPM range of the driven shaft.
6. The available center distance between the
driver and driven shaft.
7. Determine the model Hi-Lo Pulley drive to
be used, considering Horsepower and Speed
Range requirement at the driven shaft.
2. The Service Factor of the drive. See charts
below and on page 6 to determine other
conditions that may affect drive selection.
8. Determine the belt to be used considering
the Hi-Lo Pulley Drive selected and
available center distance.
3. The diameters of the driver shaft and driven
shaft.
The Hi-Lo Catalog contains pre-engineered Belt Length and Center
Distance selection tables for Hi-Lo Pulley Fixed Center Drives.
4. The RPM of the driver shaft.
Service Factors for Hi-Lo Pulleys
Operating Hours Per Day
Service Environment
0–8
8–16
NORMAL DUTY: Where infrequent starting and peak loads do not exceed 160% of normal running load
1.00
1.10
1.30
MODERATE DUTY: Where occasional starting and peak loads do not exceed 250% of normal running loads
1.20
1.30
1.35
HEAVY DUTY: Where occasional starting and peak loads are in excess of 250% of normal running loads
OR where starting loads, peak loads and overloads occur frequently
1.25
1.35
1.50
The service factors are important in selecting a variable speed pulley that will provide adequate service life.
Multiply the maximum running torque or horsepower of the drive by the appropriate service factor to determine the proper capacity Hi-Lo Pulley.
16–24
27
Fixed Center Distance Drives
HP Ratings
Driven RPM
1750
at
to Max. Min.
Drive
Ratio
RPM Range
1750 Motor
Driver
Model #
Driven
Model #
Face
Diameter
Length
Belt
Size
Standard
Bore Sizes
6.18
6.18
A
A
7.50
7.50
9.01
8.00
8.00
B
B
B
B
B
9.01
9.01
9.01
B
B
B
8.46
8.46
1422V
1422V
9.88
10.57
10.57
1922V
1922V
1922V
11.34
11.34
1922V
1922V
11.69
11.69
11.69
2322V
2322V
2322V
11.74
2322V
V-BELT DRIVES
MCV 30
.75
1.0
.38
.39
4:1
3.1:1
875/3500
687/2106
1.5
2.0
2.0
2.0
2.0
.55
.64
.64
.55
.52
7.1:1
5: 1
5.4:1
4.6:1
3.8:1
647/4625
557/3014
557/3014
485/2248
367/1408
3.0
3.0
5.0
1.10
.97
1.22
6.9:
5.7:1
4.0:1
1648/4500
564/3214
427/1750
1.0
1.5
.31
.34
10:1
7.5:1
550/5500
400/3000
2.0
3.0
3.0
.48
.65
.60
9.6:1
7.7:1
5.8:1
423/4075
375/2863
305/1776
3.0
5.0
.77
1.00
7.7:1
5.8:1
450/3470
365/2108
3.0
5.0
5.0
.77
1.00
.96
10:1
9:1
7.4:1
450/4500
380/3420
336/2490
7.5
1.70
6:1
395/2397
30TBR
40 TBR
MCV 500
50 TBR
57-20 TBR
57 TBR
66 TBR
86 TBR
MCV 57
57 TBR
66 TBR
86 TBR
MCW 600
60 TBR
75 TBR
MCW 70
80 TBR
90-19 TBR
110TBR
MCW 77
90-19 TBR
110 TBR
MCW 90
90-23 TBR
106 TBR
120 TBR
MCW 90-75
120 TBR
3.38
3.38
4.25
5.00
5.00
5.75
5.75
6.63
8.63
5.75
5.75
6.63
8.63
6.13
6.13
7.50
7.13
8.00
9.00
11.00
7.75
9.00
11.00
9.00
9.00
10.60
12.00
9.00
12.00
.5•.625•.75
.5•.625•.75
.5•.625•.75
.625•.75•.875
.625•.75•.875
.5•.625•.75•.875
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
.75•.875•1•1.125
.625•.75•.875
.625•.75•.875
.75•.875•1•1.125
.625•.75•.875•1
.75•.875•1•1.125
510 Collet
.875•1•1.125
510 Collet
510 Collet
.875•1•1.125
510 Collet
510 Collet
510 Collet
1.125•1.25•1.375
510 Collet
ASYMMETRIC BELT DRIVES
MA 82
5.0
1.50
6:1
500/3000
8.27
A 96
MA 96
10.0
3.20
5.4:1
560/3000
15.0
4.30
6:1
500/3000
A 112
11.20
A 130
13.0
5:1
600/3000
A130-33
11.40
5:1
600/3000
50.0
21.00
4.5:1
717/3580
60.0
30.00
4.6:1
700/3220
A 164
100
3:1
1010/3000
40.00
4:1
595/2380
A 177
75.80
2.5:1
838/2055
Collet No. 512
12.70
26A
Collet No. 7713
1.375•1.625
1.625•1.875
13.30
33A
16.40
A 177
A 221
13.50
36A
16.40
14.70
36A
17.70
16.45
36A
SK Bushing
SF Bushing
SF Bushing
17.70
18.13
36A
22.10
18.13
36A
22.10
SK Bushing
SK Bushing
22.10
A 221
Collet No. 7713
1.625•1.875•2.125
17.70
MA 221
125
26A
16.40
A164
MA 177
55.00
12.30
13.60
MA 164
75.0
13.00
Collet No. 512
1•1.125•1.375•1.625
11.20
MA 136
40.0
23A
11.20
MA 112-33
9.80
9.00
9.63
MA 112
30.0
9.63
1•1.125•1.375
SF Bushing
SF Bushing
SF Bushing
23.13
36A
SF Bushing
28
Bmax
MCV Series .75–5 hp
C
D
1/2-20THD
continued on next page
Fixed Center Distance Drives
E
A
MCV series pulleys are Fixed
Center Distance Drive type
pulleys. The MCW pulleys use
Standard V-Belts and have
horsepower rating from .75–5
HP. The automatic pulleys have
Hi-Lo’s torque-sensing
mechanism to control belt
tension with load requirement.
J
1/4”
H
OFFSET
L
Torque Arm
3/8” Anchor Rod
M
Dimensions • MCV Series
MCV30
All dimensions are in inches
A
B
C
D
E
F
G
H
I
3.38
4.50
.75
1.63
2.19
2.30
.44
.99
2.25
30TBR
40TBR
MCV500
5.00
5.40
1.07
2.05
2.19
2.30
.44
1.01
5.75
6.50
1.13
3.13
2.88
2.30
.44
1.01
57TBR
66TBR
86TBR
Stock
Bore
Sizes
J
K
L
M
.93
.93
3.06
3.06
2.69
2.69
3.38
4.25
1.27
1.27
1.77
1.77
1.77
4.07
4.07
5.08
5.08
5.08
3.07
3.07
3.88
3.88
3.88
.625•.75•.875
5.0
.625•.75•.875
5.75
.625•.75•.875
5.75 .75•.875•1•1.125
6.63 .75•.875•1•1.125
8.63 .75•.875•1•1.125
1.38
1.38
1.38
5.08
5.08
5.08
3.88
3.88
3.88
.75•.875•1•1.125
5.75 .75•.875•1•1.125
6.63 .75•.875•1•1.125
8.63 .75•.875•1•1.125
4.25
50TBR
57-20TBR
57TBR
66TBR
86TBR
MCV57
F
Imax
K
Pulley Combination
Driver
Driven
G
5.75
.5•.625•.75
.5•.625•.75
.5•.625•.75
*Model MCV500 replaces MCV50
All dimensions are in inches
Specifications • MCV Series
HP Ratings
1750 RPM
1150 RPM
Driven RPM
Driven RPM
1750
at
1150
at
to Max.
Min.
to Max.
Min.
.75
1.00
1.50
2.00
2.00
2.00
2.00
3.00
3.00
5.00
.38
.39
.55
.64
.64
.55
.52
1.10
.97
1.22
.50
.75
1.00
1.50
1.50
1.50
1.50
2.00
2.00
3.00
.25
.25
.36
.42
.42
.36
.34
.72
.64
.80
Driven RPM
1750 RPM
1150 RPM
Min.
Max.
Min.
Max.
Ratio
Pitch Diameter
Pulley Combination
Driver
Driven
Driver Driven
Belt
1-1
Size Min. Max. Min. Max. Ratio
875
687
647
557
557
485
367
648
564
427
3500
2106
4625
3014
3014
2248
1408
4500
3214
1750
578
454
427
368
368
320
243
428
373
282
2310
1390
3053
1990
1990
1484
929
2970
2121
1155
4.0:1
3.1:1
7.1:1
5.4:1
5.4:1
4.6:1
3.8:1
6.9:1
5.7:1
4.1:1
MCV30
30TBR
MCV30
40TBR
MCV500 50TBR
MCV500 57-20TBR
MCV500 57TBR
MCV500 66TBR
MCV500 86TBR
MCV57
57TBR
MCV57
66TBR
MCV57
86TBR
A
A
B
B
B
B
B
B
B
B
1.57
1.57
1.72
1.72
1.72
1.72
1.72
2.00
2.00
2.00
3.14
3.14
4.65
4.65
4.65
4.65
4.65
5.40
5.40
5.40
1.57
2.60
1.76
2.70
2.70
3.62
5.78
2.10
2.94
5.30
3.14
4.00
4.65
5.40
5.40
6.20
8.20
5.40
6.20
8.20
2.36
2.87
3.25
3.70
3.70
4.14
3.82
4.20
5.35
29
Horsepower Curve • 1750 RPM Driver
6.0
DRIVEN HORSEPOWER
5.0
MCV57 / 86TBR
4.0
MCV57 / 57TBR • MCV57 / 66TBR
3.0
MCV500 / 57TBR • MCV500 / 66TBR • MCV500 / 86TBR
2.0
MCV500 / 50TBR
1.0
400
MCV30 / 40TBR
800
1200
1750
1600 2000
2400
2800
MCV30 / 30TBR
3200
3600
4000
4400
4800
DRIVEN RPM
Pre-Engineered Belt and Center Distance Selection Chart • MCV Series
MCV30 Series
All dimensions are in inches
Pulley Combination
Driver
Driven
MCV30
30TBR
40TBR
A21
7.4
6.6
A23
8.4
7.7
A26
9.9
9.2
A29
11.4
10.7
A31
12.4
11.7
A Section Belt Sizes
A33
A35
A37
13.4
14.4
15.4
12.7
13.7
14.7
B28
9.8
9.1
8.3
B32
11.8
11.1
10.4
B35
13.3
12.6
11.9
10.0
B38
14.8
14.1
13.4
11.6
B40
15.8
15.1
14.4
12.6
B Section Belt Sizes
B42
B44
B46
16.8
17.8
18.8
16.2
17.2
18.2
15.5
16.5
17.5
13.6
14.7
15.7
B48
19.8
19.2
18.5
16.7
B50
20.8
20.2
19.5
17.7
B53
22.3
21.7
21.0
19.2
B56
23.8
23.2
22.5
20.7
B59
25.3
24.7
24.0
22.7
B28
8.9
8.2
B32
10.9
10.2
B35
12.4
11.7
9.9
B38
13.9
13.2
11.4
B40
15.0
14.3
12.4
C Section Belt Sizes
B42
B44
B46
16.0
17.0
18.0
15.3
16.3
17.3
13.5
14.5
15.5
B48
19.0
18.3
16.5
B50
20.0
19.3
17.5
B53
21.5
20.8
19.0
B56
23.0
22.3
20.6
B59
24.5
23.8
22.1
A39
16.4
15.7
A42
17.9
17.2
A46
19.9
19.2
A48
20.99
20.2
A51
22.4
21.7
MCV500 Series
Pulley Combination
Driver
Driven
50TBR
57TBR
MCV500
66TBR
86TBR
MCV57 Series
Pulley Combination
Driver
Driven
57TBR
MCV57
66TBR
86TBR
To determine unlisted Belt Lengths
and Center Distances, use these formulas:
L=2C+3.14D
C=(L-3.14D)
2
C=Center Distance
D=1.1 Pitch Diameter
L=Belt Pitch Length
30
MCW Series 1–7.5 hp
Bmax
continued on next page
Fixed Center Distance Drives
1/2-20THD
E
A
Standard V-Belt and
Variable Speed Belt Pulley Drives
MCW series pulleys are Fixed Center
Distance Drive type pulleys. The MCW
pulleys use Variable Speed Belts and
have horsepower rating from 1–7.5 HP.
The automatic pulleys have Hi-Lo’s
torque-sensing mechanism to control
belt tension with load requirement.
C
D
G
Imax
J
1/4”
H
OFFSET
L
Torque Arm
3/8” Anchor Rod
M
K
Dimensions • MCW Series
Pulley Combination
Driver
Driven
MCW600
All dimensions are in inches
A
B
C
D
E
F
G
H
I
6.13
6.20
.75
2.70
2.20
2.00
.437
1.41
4.25
60TBR
75TBR
MCW70
7.13
6.63
1.25
3.12
2.63
4.50
.437
1.53
7.75
7.65
1.25
3.50
2.88
4.50
.437
1.78
9.00
9.00
7.88
7.99
1.25
1.25
3.50
3.50
2.88
2.88
4.50
4.50
.437
.437
1.97
1.97
.31
.34
.48
.65
.60
.77
1.00
.77
1.08
.96
1.70
.075
1.00
1.33
2.00
2.00
2.00
3.00
2.00
3.00
3.00
5.00
.20
.22
.32
.42
.35
.52
.63
.52
.65
.58
1.13
36
54
72
108
108
108
180
108
180
180
270
M
1.51
1.51
5.08
5.08
3.94
3.88
6.13
7.50
2.00
2.69
2.69
5.27
7.13
7.13
4.81
5.50
5.50
8.00
9.00
11.00
2.44
2.44
7.13
7.13
5.50
5.50
9.00
11.00
2.56
2.56
2.56
7.13
7.13
7.13
6.00
6.00
6.00
9.00
10.60
12.00
Stock
Hand
Bore/Collet
wheel
Sizes
Turns
.625•.75•.875
16.0
.625•.75•.875
.75•.875•1•1.125
.625•.75•.875•1 18.0
.75•.875•1•1.125
*Collet #510
*Collet #510
.875•1•1.125
21.3
*Collet #510
*Collet #510
.875•1•1.125
25.0
.875•1•1.125•
1.25•1.375
25.0
*Collet #510
*Collet #510
*Collet #510
*Standard bore sizes for Collet #510: 1, 1.125, 1.25, 1.375
Specifications • MCW Series
1.00
1.50
2.00
3.00
3.00
3.00
5.00
3.00
5.00
5.00
7.50
L
5.75
5.75
90-23TBR
106TBR
120TBR
HP Ratings
1750 RPM Motor 1150 RPM Motor Torque
Driven RPM
Driven RPM
@1-1
1750
at
1150
at
Ratio
to Max. Min.
to Max. Min.
K
5.75
90-19TBR
110TBR
MCW90
MCW90-75
J
5.75
80TBR
90-19TBR
110TBR
MCW77
F
Driven RPM
1750 RPM Motor
Pulley Combination
1150 RPM Motor
Min.
Max.
Min.
Max.
550
400
423
375
305
450
365
450
380
336
395
5500
3000
4075
2863
1776
3470
2108
4500
3420
2490
2397
356
264
278
246
201
297
241
297
251
222
260
3560
1980
2678
1882
1167
2290
1391
2970
2257
1642
1555
Ratio
10:1
7.5:1
9.6:1
7.7:1
5.8:1
7.7:1
5.8:1
10:1
9:1
7.4:1
6:1
Driver
Driven
Belt
Size
MCW600
MCW600
MCW70
MCW70
MCW70
MCW77
MCW77
MCW90
MCW90
MCW90
MCW90-75
60TBR
75TBR
80TBR
90-19TBR
110TBR
90-19TBR
110TBR
90-23TBR
106TBR
120TBR
120TBR
1422V
1422V
1922V
1922V
1922V
1922V
1922V
2322V
2322V
2322V
2322V
Pitch Diameter
Driver
Driven
Min. Max. Min. Max.
1-1
Ratio
1.70
1.70
1.88
1.88
1.88
2.25
2.25
2.25
2.25
2.25
2.65
3.90
4.71
5.02
5.60
6.80
5.74
6.90
5.72
6.67
7.48
7.64
5.92
5.92
6.90
6.90
6.90
7.53
7.53
8.75
8.75
8.75
8.75
1.70
3.44
2.96
4.22
6.80
3.80
6.25
2.88
4.44
6.15
6.47
5.92
7.30
7.78
8.78
10.78
8.78
10.78
8.75
10.38
11.75
11.75
31
Horsepower Curve • 1750 RPM Driver
8.0
MCW90-75 / 120TBR
7.0
DRIVEN HORSEPOWER
6.0
MCW77 / 110TBR • MCW90 / 106TBR •
5.0
MCW90 120TBR
4.0
MCW70 / 90-19TBR • MCW70 / 110TBR
3.0
MCW77 / 90-19TBR • MCW90 / 90-23TBR
MCW70 / 80TBR
2.0
MCW600 / 75TBR
1.0
MCW600 / 60TBR
1750
0
400
800
1200
1600
2000
2400
2800
3200
3600
4000
4400
DRIVEN RPM
Pre-Engineered Belt and Center Distance Selection Chart • MCW Series
All dimensions are in inches.
MCW600 Series
Pulley Combination
Driver
Driven
MCW600
MCW600
60TBR
75TBR
300
330
340
360
400
420
8.8
7.6
10.3
9.1
10.8
9.6
11.8
10.6
13.8
12.6
14.8
13.6
1422V Belt Size
440
460
15.8
14.6
16.8
15.6
470
480
540
600
660
720
17.3
16.1
17.8
16.6
20.8
19.6
23.8
22.6
26.8
25.6
29.8
28.6
MCW77 and MCW70 Series
Pulley Combination
Driver
Driven
MCW70
MCW70
MCW70
MCW77
MCW77
80TBR
90-19TBR
110TBR
90-19TBR
110TBR
381
403
426
443
454
484
11.1
10.1
12.2
11.2
10.0
11.1
13.4
12.5
10.4
12.3
10.5
14.3
13.3
11.3
13.1
11.3
14.8
13.9
11.9
13.7
11.9
16.3
15.4
13.5
15.2
13.4
1922V Belt Size
526
544
18.5
17.6
15.7
17.3
15.5
19.4
18.5
16.7
18.2
16.4
604
630
646
666
726
756
22.4
21.5
19.8
21.2
19.4
23.7
22.9
21.1
22.5
20.7
24.5
23.7
21.9
23.3
21.5
25.5
24.7
22.9
24.3
22.5
28.6
27.7
26.0
27.3
25.5
30.1
29.2
27.5
28.8
27.0
MCW90 and MCW90-75 Series
Pulley Combination
Driver
Driven
MCW90
MCW90
MCW90
MCW90-75
90-23TBR
106TBR
120TBR
120TBR
441
481
521
541
601
621
13.1
11.6
15.1
13.6
12.3
12.1
17.1
15.6
14.3
14.1
18.1
16.6
15.3
15.1
21.1
19.6
18.3
18.1
22.1
20.6
19.3
19.1
2322V Belt Size
661
681
24.1
22.6
21.3
21.1
25.1
23.6
22.3
22.1
701
721
801
826
846
886
26.1
24.6
23.3
23.1
27.1
25.6
24.3
24.1
31.1
29.6
28.3
28.1
32.3
30.8
29.6
29.3
33.3
31.8
30.6
30.3
35.3
33.8
32.6
32.3
To determine unlisted Belt Lengths and Center Distances, use these formulas:
L = (2C + 3.14D)
C=
(L - 3.14D)
2
C = Center Distance
D = 1 to 1 Pitch Diameter
L = Belt Pitch Length
32
MA Series 5–30 hp
continued on next page
Asymmetric Fixed Center Distance Drives
H
J
G
Asymmetric Belt Pulley Drives
B
Instead of two identically angled V-shaped belt faces, Asymmetric Variable
Speed pulleys pair a V-angled face with a nearly flat (2º) fixed face. The
resulting design produces some important features
A
• Stable Belt Center Line:
As the fixed pulley face is nearly perpendicular, the belt center line
movement throughout the entire pitch diameter range is negligible. Belt
alignment with the driven sheave is maintained and crosswise wear on belts
is reduced.
C
F
• Compact and Simple
Asymmetric drives require a minimum of space in a C-Flow configuration
relative to their horsepower capacity. Installation alignment can be checked
simply by laying a straight edge along the back of the fixed disks. The
reduction of parts in the single sliding face design minimizes the possibility
of a critical breakdown and simplifies repairs and replacement of parts.
P1
E
• Stable and Low Overhung Load On Bearings
The C-Flow configuration of Asymmetric Drives and the nearly
perpendicular angle of the fixed pulley face locates the point of bending
moment close to mounting shaft bearings. The peripheral support of the cam
and cam follower torque-sensing mechanism also reduces wear on the
sliding face bearing surface. Use of interchangeable collet bushings
eliminates side wobble and vibration due to bad fits between motor spindle
and pulley shaft.
N
• Automatic Belt Tensioning
Incorporated in the automatic variable speed pulleys is Hi-Lo’s exclusive
belt-tensioning device. The cam and cam follower mechanism adjusts belt
tension to the load requirement and stabilizes the pitch diameter setting
regardless of load fluctuations.
O
P2
Q
R
Dimensions • MA Series 5–30 HP
Pulley Combination
Driver
Driven
MA82
A
B
C
8.27
3.94
4.0
All dimensions are in inches
D
E
F
G
H
J
P1
.38
4.9
2.68
9.0
7.38
1.14
A96
MA96
9.63
5.12
6.0
.47
7.0
4.88
12.3
11.2
5.12
6.0
.47
7.0
5.31
12.7
10.5
11.2
A130-33
6.30
6.0
.63
7.5
5.00
13.3
P2
Q
9.63
7.13
1.14
4.0
11.2
7.13
1.48
4.0
13.0
7.13
1.48
4.8
13.0
7.13
1.48
4.8
1.48
A130
MA112-33
O
10.12 1.14
A112
MA112
N
10.8
1.32
R
Stock Bores
or
Collet Sizes
1•1.125•1.375
*Collet #512
1.125•1.375•1.625
7.94
*Collet #512
1.375•1.625
7.81
*Collet #7713
1.625•1.875
8.25
*Collet #7713
Hand
Wheel
Turns
17.8
7.25
9.2
11.6
10.7
Standard Bore Sizes for Collet #510: .75, .875, 1, 1.125, 1.25, 1.375
#7713: 1.375, 1.5, 1.625, 1.875
33
Horsepower Curve • 1750 RPM Driver
32.0
MA112-33 / A130-33
28.0
24.0
DRIVEN HORSEPOWER
20.0
16.0
MA112 / A130
12.0
MA96 / A112
8.0
MA82 / A96
4.0
1750
400
800
1200
1600
2000
2400
2800
3200
3600
DRIVEN RPM
Specifications • MA Series 5–30 HP
All dimensions are in inches
HP Ratings
1750 RPM
1150 RPM
Driven RPM
Driven RPM
1750
at
1150
at
to Max. Min.
to Max. Min.
Torque
@1-1
Ratio
Min.
Max.
Min.
Max.
5.00
10.00
15.00
30.00
180
360
540
1080
500
560
500
600
3000
3000
3000
3000
333
373
333
400
2000
2000
2000
2000
1.50
3.20
4.30
9.80
3.00
7.50
10.00
20.00
1.00
2.20
2.90
6.50
Driven RPM
1750 RPM
Pulley Combination
1150 RPM
Ratio
6:1
5.4:1
6:1
5:1
Driver
Driven
Belt
Size
MA82
MA96
MA112
MA112-33
A96
A112
A130
A130-33
23A
26A
26A
33A
Pitch Diameter
Driver
Driven
Min. Max. Min. Max.
1-1
Ratio
2.76
3.45
3.55
4.20
6.15
7.32
8.35
8.54
MA82
A96
Pulley Combination
Driver
Driven
MA96
MA112
A112
A130
Pulley Combination
Driver
Driven
MA112-33 A130-33
4.32
5.32
5.82
6.25
9.24
10.70
12.40
12.40
To determine unlisted Belt
Lengths and Center Distances,
use these formulas:
L = (2C + 3.14D)
Pre-Engineered Belt and Center Distance Selection • MA Series 5–30 HP
Pulley Combination
Driver
Driven
7.88
9.24
10.7
10.7
MM→
Inches→
C.D.
1060
41.7
11.2
1100
43.3
12.8
1180
46.5
13.6
1250
49.3
15.0
23A Belt
1400
55.2
17.9
Section Pitch Lengths
1500
1600
1700
59.2
63.0
66.9
19.9
21.8
23.8
1800
71.9
25.8
2000
78.7
29.7
MM→
Inches→
C.D.
C.D.
1250
49.3
13.2
1300
51.2
14.1
12.5
1400
55.2
16.1
14.5
1500
59.2
18.1
16.5
26A Belt
1600
63.0
20.0
18.4
Section Pitch Lengths
1750
1800
1900
68.9
70.9
74.8
23.0
24.0
25.9
21.3
22.3
24.3
2000
78.7
27.8
26.2
2120
83.5
30.3
28.6
2400
94.5
35.8
34.1
2500
98.4
37.7
36.1
2650
104.3
40.6
39.0
MM→
Inches→
C.D.
1500
59.2
16.2
1600
63.0
18.1
1700
66.9
20.0
1750
68.9
21.0
33A Belt
1800
70.9
22.0
Section Pitch Lengths
1900
2000
2120
74.8
78.7
83.5
24.0
25.9
28.3
2300
90.6
31.9
2400
94.5
33.8
2500
98.4
35.8
2650
104.3
38.7
2800
110.2
41.7
C = (L - 3.14D)
2
C = Center Distance
D = 1:1 Pitch Diameter
L = Belt Pitch Length
34
MA Series 40–125 hp
continued on next page
Asymmetric Fixed Center Distance Drives
Asymmetric Belt Pulley Drives
Instead of two identically angled V-shaped belt faces, Asymmetric Variable
Speed pulleys pair a V-angled face with a nearly flat (2º) fixed face. The
resulting design produces some important features:
G
B
• Stable Belt Center Line:
As the fixed pulley face is nearly perpendicular, the belt center line
movement throughout the entire pitch diameter range is negligible. Belt
alignment with the driven sheave is maintained and crosswise wear on belts
is reduced.
D
A
• Compact and Simple
Asymmetric drives require a minimum of space in a C-Flow configuration
relative to their horsepower capacity. Installation alignment can be checked
simply by laying a straight edge along the back of the fixed disks. The
reduction of parts in the single sliding face design minimizes the possibility
of a critical breakdown and simplifies repairs and replacement of parts.
• Stable and Low Overhung Load On Bearings
The C-Flow configuration of Asymmetric Drives and the nearly
perpendicular angle of the fixed pulley face locates the point of bending
moment close to mounting shaft bearings. The peripheral support of the cam
and cam follower torque-sensing mechanism also reduces wear on the
sliding face bearing surface. Use of interchangeable collet bushings
eliminates side wobble and vibration due to bad fits between motor spindle
and pulley shaft.
H
J
C
F
P1
E
N
O
HOLDING
SCREW
REMOVAL
SCREW
• Automatic Belt Tensioning
Incorporated in the automatic variable speed pulleys is Hi-Lo’s exclusive
belt-tensioning device. The cam and cam follower mechanism adjusts belt
tension to the load requirement and stabilizes the pitch diameter setting
regardless of load fluctuations.
P2
D
Q
R
Dimensions • MA Series 40–125 HP
Pulley Combination
Driver
Driven
A
B
C
D
All dimensions are in inches
E
F
G
H
Min.
MA136
13.6
6.3
7.9
A164
MA164
16.4
7.49
7.9
A164
MA164
16.4
7.49
7.9
A177
MA177
17.7
9.46
9.8
A177
MA177
17.7
9.46
9.8
A221
MA221
22.1
A221
12.2
9.8
.63
1.00
1.00
1.00
1.00
1.13
1.13
1.13
1.13
1.13
1.13
1.13
.67
.67
.79
.79
.79
7.7
9.0
9.0
9.7
9.7
11.8
J
P1
N
O
P2
Q
R
16.4
7.28
1.75
5.5
10.2
16.4
7.28
1.75
5.5
10.2
17.7
8.98
2.50
5.5
13.6
17.7
8.98
2.50
5.5
13.6
22.1
10.0
2.50
6.7
15.0
22.1
10.0
2.50
6.7
15.0
Max.
4.3
5.5
5.5
5.5
5.5
6.6
13.2
14.7
14.7
17.0
17.0
22.0
11.7
12.9
12.9
15.0
15.0
17.9
1.75
1.75
1.75
2.5
2.5
2.5
Stock Bores
or
Collet Sizes
Hand
Wheel
Turns
1.625•1.875•2.125
SK
SK
SK
SK
SF
SF
SF
SF
SF
SF
SF
15.9
15.9
15.9
12.0
12.0
12.0
Standard Bore Sizes for Collet #510: .75, .875, 1, 1.125, 1.25, 1.375
#7713: 1.375, 1.5, 1.625, 1.875
35
Horsepower Curve • 1750 RPM Driver
128
MA221 / A221
112
MA177 / A221
DRIVEN HORSEPOWER
96
80
MA177 / A177
64
MA164 / A177
MA164 / A164
48
MA136 / A164
32
16
1750
400
800
1200
1600
2000
2400
2800
3200
3600
DRIVEN RPM (1750 RPM DRIVER)
All dimensions are in inches
Specifications • MA Series 40–125 HP
HP Ratings
1750 RPM
1150 RPM
Driven RPM
Driven RPM
1750
at
1150
at
to Max. Min.
to Max. Min.
40.00
50.00
60.00
75.00
100.00
125.00
11.40
35.00
30.00
55.00
40.00
75.00
25.00
30.00
40.00
50.00
60.00
100.00
7.60
23.00
19.00
36.00
26.00
49.00
Torque
@1-1
Ratio
Driven RPM
Min.
Max.
Min.
Max.
1440
1800
2160
2700
3600
5400
600
784
700
1010
595
838
3000
3580
3220
3000
2380
2055
400
520
460
670
397
559
2000
2340
2118
1988
1597
1370
1750 RPM
Pulley Combination
Ratio
1150 RPM
5:1
4.5:1
4.6:1
3:1
4:1
2.5:1
Driver
Driven
Belt
Size
MA136
MA164
MA164
MA177
MA177
MA221
A164
A164
A177
A177
A221
A221
36A
36A
36A
36A
36A
36A
Pitch Diameter
Driver
Driven
Min. Max. Min. Max.
4.30
6.43
6.43
7.16
7.16
10.00
13.0
15.7
15.7
17.0
17.0
17.4
6.43
6.43
7.60
7.60
12.50
14.80
Pre-Engineered Belt and Center Distance Selection • MA Series 40–125 HP
Pulley Combination
Driver
Driven
MA136
MA164
MA164
MA177
MA177
MA221
A164
A164
A177
A177
A221
A221
MM
inches
C.D.
C.D.
C.D.
C.D.
C.D.
C.D.
1800
70.9
19.0
17.2
1900
74.8
20.9
19.2
18.2
2000
78.7
22.9
21.2
20.2
18.2
2120
83.5
25.3
23.5
22.6
20.5
2250
88.6
27.8
26.1
25.1
23.1
To determine unlisted Belt Lengths and
Center Distances, use these formulas:
L = (2C + 3.14D)
C = (L - 3.14D)
2
36A Belt section Pitch
2400 2500
2600
94.5
98.4
102.4
30.8
32.7
34.7
29.3
31.0
33.0
28.1
30.1
32.0
26.1
28.0
30.0
23.7
25.7
27.7
C = Center Distance
D = 1 to 1 Pitch Diameter
L = Belt Pitch Length
Lengths
2700
106.3
36.7
34.9
34.0
32.0
29.7
2800
110.2
38.6
36.9
35.9
33.9
31.6
29.7
3000
118.1
42.6
40.8
39.9
37.9
35.6
33.7
3200
126.0
46.5
44.8
43.8
41.8
39.5
37.6
15.7
15.7
17.0
17.0
21.5
21.5
1-1
Ratio
10.5
11.6
12.2
13.5
15.0
16.2
36
VARI-Mod
Lube-free transmission case for mounting to
continued on next page
standard C-face motors and reducers
Hi-Lo’s VARI-Mod Case — A complete variable speed drive system which can be combined
with off-the-shelf components to build variable speed drives of all types and arrangements.
Control Cover Assembly
Calibrated speed control knob,
screw tension adjustment,
minimum and maximum RPM
stop adjustment.
Simplified Design
Allows easy access for maintenance
and parts replacement.
Adapter Plate For mounting NEMA
56C, 143TC, 145TC
and C–face motors.
Dual Standard “C”
Face Output Flanges
Accommodates “C”
flange input reducers
in either a “C” or “Z”
flow arrangement.
Lube-Free Controllable
Variable Speed Pulley.
Double Output Shaft
Additional shaft can be
used for dual drive,
tachometers, brakes
and other accessory
items.
Universal Mounting
Foot mounted or
reducer mounted Cface covers can be
rotated 90° to mount
in any position— horizontal, vertical—
shafts up or down.
Special order only.
Hi-Lo’s Lube-Free,
Torque-Sensing Automatic
Variable Speed Pulley
Stabilizes RPM output and
increases drive component life.
BASIC UNIT
WITHOUT MOUNTING
HORIZONTAL C-FLOW
OUTPUT SHAFT
MOUNTING
Z-FLOW OUTPUT SHAFT
MOUNTING
C-FLOW OUTPUT
SHAFT MOUNTING
37
VARI-Mod Dimensions
continued on next page
Motor Shaft-Output Shaft Dimension Option
A
Model
6060.01
6060.02
6060.03
6060.04
6060.05
6060.06
6075.01
6075.02
6075.03
6075.04
6075.05
6075.06
Motor
Shaft
5/8
5/8
7/8
7/8
5/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
Z Flow
Shaft
5/8
Omitted
5/8
Omitted
5/8
5/8
7/8
Omitted
5/8
Omitted
7/8
5/8
B
C Flow
Shaft
5/8
5/8
5/8
5/8
Omitted
Omitted
7/8
7/8
5/8
5/8
Omitted
Omitted
*Motor Frame Sizes
H.P. @ 1750 RPM Standard
.5,.75
56C
.5,.75
56C
1
143 TC
1
143 TC
1.5
145 TC
1.5
145 TC
1
143 TC
1
143 TC
1.5
145 TC
1.5
145 TC
2
145 TC
2
145 TC
*Hi-Lo’s VARI-Mod is supplied
with or without motors.
The standard stock motor is a
C–face motor, 1750 RPM,
three-phase totally enclosed,
and fan cooled. Other type or
RPM motors with a 56 C, 143
TC, or 145 TC frame size can
be furnished at an additional
charge.
38
VARI-Mod Performance Data
Model 6060 VARI-Mod
Horsepower and Torque Output Vs. 1750 RPM Motor Horsepower input
Torque
in.-lbs. HP
Torque
HP
1.5
60
in.-lbs.
56
1.4
52
1.3
48
1.2
44
1.1
10
1.0
36
0.9
32
0.8
28
0.7
24
0.6
20
0.5
16
0.4
12
.0.3
8
0.2
4
0.1
Horsepower
Torque
1.5 HP
1 HP
.75 HP
1.5 HP
.5 HP
1 HP
.75 HP
.5 HP
RPM
800
1600
2400
3200
4000
4800
Model 6075 VARI-Mod
Horsepower and Torque Output Vs. 1750 RPM Motor Horsepower input
Torque
in.-lbs. HP
Torque
in.-lbs. HP
84
2.2
76
2.0
68
1.8
60
1.6
52
1.4
1.5 HP
44
1.2
2 HP
36
1.0
28
0.8
20
0.6
16
0.4
8
0.2
0
00
Horsepower
Torque
2 HP
1.5 HP
RPM
400
800
*Output RPM
1725 RPM
Min.
Max.
*Output RPM
1140RPM
Min. Max.
Motor
HP
6060
550
4950
360
3270
6075
450
2700
300
1800
1200
1600
2000
2400
2800
Transmission Ratings and Speed Ranges
Model
.5
.75
1
1.5
1.5
2
Output HP
1725 RPM
Min.
Max.
.11
.21
.28
.41
.35
.46
.35
.65
.87
1.30
1.35
1.80
Output Torque (In.-lb.s)
1725 RPM
Min.
Max.
13
24
32
47
49
65
5
9
11
17
32
42
Output HP
1140 RPM
Min.
Max.
.11
.21
.28
NA
.35
NA
*When mounted to a reducer, the output RPM range is found by dividing the gearless range by the reducer ratio.
.35
.65
.87
NA
1.35
NA
Output Torque (In.-lb.s)
1140 RPM
Min.
Max.
19
32
48
NA
74
NA
7
14
17
NA
47
NA
39
Hi–Ratio Compound Pulleys
Hi-Ratio Compound Pulleys for .25 and .5 HP drives provide economy and exceptional efficiency at speed
ratios up to 7 to 1. Pulley faces are made of highly durable plastic containing special additives to ensure
long service life.
The pulley itself is comprised of two parts, either of which can be used independently. These are:
1. HR-2 Variable Speed Pulley Assembly which is needle-bearing mounted on a hardened and
ground countershaft. It requires a control of some type for operation.
2. HRB-2 Control Base. On the majority of applications, this base eliminates the necessity for a
pivoted motor base to maintain proper belt tension.
Operating Principle
The Hi-Ratio Pulley is needle-bearing mounted on a hardened and ground crankshaft. Speed
variation is accomplished by moving the countershaft between the driving and driven sheaves.
Movement towards the driver (Fig. 1) reduces the driven speed. Movement away from the driver
(Fig. 2) increases the driven speed..
Figure 2
Figure 1
Figure 3
Engineering Data
Hi-Ratio
Pulleys
Belt Max. Min. Mean
Ratio Size P.D. P.D. P.D.
145HR-2
6-1
165HR-2
7.2-1
4L,A 4.60 1.875 3.25
A
6.50 2.40 4.50
Movement
Required
for Max.
Speed Range
Approx. Wts.
A
B
C
D
E
F
With
Shaft
2.125
6.5
3.875
4.75
1.19
.75
2.875 2.5 lbs.
3.375
8.06
4.75
6.75
1.69
1.0
3.875
6 lbs.
Without
Shaft
1.75 lbs.
4 lbs.
40
Engineering Data • Hi-Ratio Pulleys
MOTOR
Model
Horse Power
Max. Min.
OR
DRIVER
RPM.
Sheave
P.D.
145
HR-2
.5
.25
1750
2.4
145
HR-2
.5
.25
1750
3.0
145
HR-2
.5
.25
1750
3.6
165
HR-2
165
HR-2
165
HR-2
1
.5
1750
3.0
1
.5
1750
3.6
1
.5
1750
4.2
HI-RATIO PULLEY
Belt
Center
Belt
Pitch
Center
Distance Size Length Distance
11.75
13.25
13.75
A
36.4
15.75
15.0
18.5
13.25
13.25
13.25
A
36.4
15.75
15.0
18.5
14.25
13.25
12.875
A
36.4
15.75
15.0
18.5
11.75
14.0
14.125
A
40
15.5
15.25
11.75
13.625
A
40
14
15.5
15.25
13.25
13.25
A
40
15.0
15.25
TO
HI-RATIO PULLEY TO DRIVEN SHAFT
Belt
.
Pitch
Sheave
Driven RPM
Length
P.D.
Max.
Min.
32.4
2.4
4290
715
39.4
4.8
2120
360
44.4
6.0
1720
286
49.4
9.0
1145
191
52.4
12.0
860
143
36.4
3.0
4290
715
39.4
4.8
2680
445
44.4
6.0
2145
358
49.4
9.0
1430
238
52.4
12.0
1070
179
39.4
3.6
4300
715
39.4
4.8
3680
600
44.4
6.0
2572
430
49.4
9.0
1715
286
52.4
12.0
1286
215
36.4
3.6
3920
540
44.4
6.0
2370
330
52.4
9.0
1690
262
56.4
12.0
1185
165
36.4
3.6
4700
650
44.4
6.0
2844
395
52.4
9.0
1890
262
56.4
12.0
1422
198
39.3
4.2
4700
650
49.4
8.0
2485
345
56.4
12.0
1650
230
145 HR-2
The output speeds are
examples of the many
possible variations
obtainable. By using
other sheave diameters
on the driven shaft,
many additional variations are possible. Use
the formula below to
derive speed ranges not
covered by the table.
145 HR-2
Max. RPM of Driven =
P.D. Driver
P.D. Driven
x 2.43 Motor x RPM.
Max. RPM of Driven =
P.D. Driver
P.D. Driven
Min. RPM of Driven =
P.D. Driver x .41 x Motor RPM.
P.D. Driven
Min. RPM of Driven =
P.D. Driver x .37 x Motor RPM.
P.D. Driven
All dimensions are in inches
HRB-2 Base
Hi-Ratio
Control
Bases
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
Approx.
Weight
145HRB-2
165HRB-2
11.75
9.125
5.375
4.625
1.5
2.5
4
5
3
.75
4.25
.5
9.25
2.625
2.5
3.625
1.75
2
0
4
11.75
9.125
5.375
4.625
1.5
2.5
4
5
3
1
4.25
.5
9.25
2.625
2.5
3.625
1.75
2
0
4
8.5
8.5
x 2.70 Motor x RPM.
41
42
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Warehouses
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Mississauga, Ont, L4W4L6
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3/6/99
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FAX: 215-535-3901
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FAX: 972-438-5507
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FAX: 415-472-4584
43
Look to Hi-Lo Manufacturing for any of your custom machining
projects. Our modern facilities include state of the art robotics and
people with the expertise to get your project done.
Visit our Web site for further and up to date information.
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http://www.hi-lo.com
1700 G Freeway Boulevard
Minneapolis, Minnesota 55430
612/566-2510
FAX 566-0562
hi-lo-mfg@usinternet.com
www.hi-lo.com
HL386
Printed 4/98
45
MicroHorizons - Hi Lo Catalog Separations
Page
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Black:
4, 5, 6, 10, 16, 18, 19, 20, 21, 22, 23, 27, 32,
34, 35, 40, 42
Cyan:
3, 10, 15, 16, 19, 20, 21, 32, 34, 35