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T-48
Belt
4 mm
6 mm
9 mm
12 mm
15 mm
20 mm
25 mm
2 mm GT
3 mm GT
5 mm GT
3 mm HTD
5 mm HTD
MXL
XL
1/8"
3/16"
1/4"
5/16"
3/8"
7/16"
1/2"
2
—
—
—
—
2
2
3
8
—
5
—
3
3
4
11
18
9
13
3
4
5
15
22
12
18
4
5
—
19
27
16
24
5
6
—
25
35
22
33
—
8
—
—
43
—
43
—
9
Minimum Tst (lbs)
Per Span
Belt
Width
Belt
m
Y
4 mm
6 mm
9 mm
12 mm
6 mm
9 mm
12 mm
15 mm
9 mm
15 mm
20 mm
25 mm
6 mm
9 mm
15 mm
9 mm
15 mm
25 mm
1/8"
3/16"
1/4"
1/4"
3/8"
2 mm GT
3 mm GT
5 mm GT
3 mm HTD
5 mm HTD
MXL
XL
0.026
0.039
0.058
0.077
0.077
0.120
0.150
0.190
0.170
0.280
0.380
0.470
0.068
0.102
0.170
0.163
0.272
0.453
0.003
0.004
0.005
0.010
0.015
1.37
2.05
3.08
4.10
3.22
4.83
6.45
8.06
14.9
24.9
33.2
41.5
3.81
5.71
9.52
14.9
24.9
41.5
1.40
2.11
2.81
3.30
4.94
1.3
2.0
3.0
4.0
2.2
3.3
4.4
5.5
8.4
14.1
18.7
23.4
2.5
4.3
7.8
6.3
12.0
21.3
1.0
1.7
2.3
3.2
5.1
Table 16 Belt Tensioning Force
Registration Drives: Registration drives are required to register, or position accurately.
Higher belt installation tensions help in increasing belt tensile modulus as well as in increasing
meshing interference, both reducing backlash. Tension values for these applications should be
determined experimentally to confirm that desired performance characteristics have been achieved.
As a beginning point, use values from Table 17 multiplied by 1.5 to 2.0.
Table 17 Static Belt Tension, Tst (lbs) Per Span – General Values
NOTE: Y = constant used in Equations (10-4) and (10-5).
Most synchronous belt applications often exhibit their own individual operating characteristics.
The static installation tensions recommended in this section should serve as a general guideline in
determining the level of tension required. The drive system should be thoroughly tested to confirm
that it performs as intended.
10.2 Making Measurements
Belt installation tension is generally, measured in the following ways:
Force/Deflection: Belt span tension can be measured by deflecting a belt span 1/64" per
Belt