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General Rules of Tensioning
1. Ideal tension is the lowest tension at which the belt will not slip under
2. Check tension frequently during the rst 24-48 hours of operation.
3. Over tensioning shortens belt and bearing life.
4. Keep belts free from foreign material which may cause slip.
5. Make V-drive inspection on periodic basis. Tension when slipping.
Tension Measurement Procedure
1. Measure the belt span (see sketch).
2. Position bottom of the large "O" ring on the span scale at the measured belt span.
3. Set the small "O" ring on the de ection force scale to zero.
4. Place the tension checker squarely on one belt at the center of the belt span. Apply a force on the
5. Remove the tension checker and read the forct applied from the bottom of the small "O" ring on
6. Compare the force you have applied with the values given in the table below. The force should be
FORCE
SCALE
SMALL
"O" RING
NOTE: The ratio of de ection to belt span is 1:64.
SPAN
SCALE
LARGE
"O" RING
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
peak load conditions.
Never apply belt dressing as this willl damage the belt and cause
early failure.
plunger and perpendicular to the belt span until the bottom of the large "O" ring is even with the
top of the next belt or with the bottom of a straight edge laid across the sheaves.
the de ection force scale.
between the minimum and maximum shown. The maximum value is shown for "New Belt" and
new belts should be tensioned at this value to allow for expected tension loss. Used belts should
be maintained at the minimum value as indicated in the table below.
Smallest
Sheave
Cross
Diameter
Section
Range
7.6 - 9.1
A, AX
9.6 - 12.2
12.7 - 17.8
8.6 - 10.7
B, BX
11.2 - 14.2
14.7 - 21.8
I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e
Tensioning V-Belt Drive
Super Gripbelts and
Unnotched Gripbands
RPM
Used
Range
Belt
16.458
1000 - 2500
2501 - 4000
12.454
20.016
1000 - 2500
2501 - 4000
16.902
24.019
1000 - 2500
2501 - 4000
20.906
-
860- 2500
2501 - 4000
-
23.574
860- 2500
2501 - 4000
20.016
28.022
860- 2500
2501 - 4000
26.688
JRE - Series
R e v . : A u g u s t 1 9 , 2 0 2 0
DEFLECTION =
BELT SPAN
Belt Deflection Force
Gripnotch Belts and
Notched Gripbands
New
Used
Belt
Belt
24.464
18.237
18.682
15.123
30.246
22.240
25.354
19.126
35.584
25.354
31.136
22.685
-
21.795
-
18.682
35.139
36.029
29.802
31.581
41.811
37.808
39.587
32.470
64
New
Belt
27.133
22.240
32.915
28.467
41.811
33.805
32.026
27.578
46.704
40.477
56.045
48.483
37
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