41
The driven pulley is used for the calculation of linear and conveyor
drives. With drive systems designed for torque transmission the
calculation uses the smaller of the two pulleys. This is irrespective
of its use as a driver or driven pulley.
The values for the specific torque M
spec
(Nm/cm) relate to one tooth
in mesh with the pulley and 10 mm timing belt width. The same
applies to the specific circumferential force S
spez
(N/cm).
4.6 ZRL circumferential force and torque table
Circumferential force and Torque Table for
optibelt
ZRL-M open ended, z
emax
= 12
and
optibelt
ZRL-V joined endless timing belts, z
emax
= 6
10 0.19 0.52 — — 0.19 — — — — ————
11 0.21 0.57 — — 0.21 — — — — ————
12 0.22 0.62 — — 0.22 0.90 — 0.26 1.17 ————
13 0.24 0.67 — — 0.24 0.98 — 0.29 1.27 ————
14 0.26 0.72 1.08 — 0.26 1.06 — 0.31 1.38 — 0.39 — —
15 0.28 0.77 1.15 — 0.28 1.13 4.50 0.34 1.47 5.85 0.42 — —
16 0.30 0.83 1.23 — 0.30 1.20 4.82 0.36 1.56 6.26 0.44 — —
17 0.32 0.87 1.31 — 0.32 1.28 5.12 0.38 1.66 6.65 0.47 — —
18 0.34 0.92 1.39 5.41 0.34 1.36 5.41 0.41 1.77 7.03 0.50 — —
19 0.36 0.97 1.46 5.71 0.36 1.43 5.71 0.43 1.86 7.43 0.53 — —
20 0.38 1.03 1.54 6.02 0.38 1.51 6.02 0.46 1.96 7.82 0.55 — —
21 0.40 1.08 1.62 6.32 0.40 1.58 6.32 0.48 2.05 8.21 0.58 — —
22 0.42 1.14 1.70 6.62 0.42 1.66 6.62 0.50 2.16 8.61 0.61 1.74 —
23 0.44 1.18 1.78 6.92 0.44 1.74 6.92 0.53 2.26 9.00 0.64 1.83 —
24 0.46 1.24 1.86 7.23 0.46 1.81 7.23 0.55 2.35 9.39 0.67 1.90 —
25 0.48 1.29 1.94 7.53 0.48 1.89 7.53 0.58 2.46 9.79 0.69 1.98 —
26 0.50 1.35 2.02 7.82 0.50 1.96 7.82 0.60 2.55 10.16 0.72 2.06 —
27 0.51 1.40 2.09 8.12 0.51 2.04 8.12 0.62 2.65 10.56 0.75 2.14 —
28 0.53 1.45 2.17 8.42 0.53 2.11 8.42 0.64 2.74 10.95 0.78 2.22 6.57
29 0.55 1.50 2.25 8.73 0.55 2.18 8.73 0.66 2.84 11.34 0.80 2.29 6.81
30 0.57 1.55 2.33 9.03 0.57 2.26 9.03 0.68 2.94 11.74 0.83 2.37 7.04
31 0.59 1.60 2.41 9.32 0.59 2.34 9.32 0.71 3.04 12.12 0.86 2.46 7.27
32 0.61 1.66 2.49 9.62 0.61 2.42 9.62 0.73 3.15 12.51 0.89 2.54 7.51
33 0.63 1.71 2.57 9.93 0.63 2.49 9.93 0.76 3.24 12.90 0.91 2.61 7.74
34 0.65 1.76 2.65 10.23 0.65 2.57 10.23 0.78 3.34 13.30 0.94 2.70 7.98
35 0.67 1.81 2.72 10.53 0.67 2.64 10.53 0.80 3.43 13.69 0.97 2.77 8.21
36 0.69 1.87 2.80 10.83 0.69 2.72 10.83 0.83 3.54 14.08 1.00 2.86 8.45
40 0.76 2.08 3.12 12.03 0.76 3.02 12.03 0.91 3.93 15.64 1.11 3.17 9.38
48 0.91 2.48 3.73 14.44 0.91 3.62 14.44 1.09 4.71 18.77 1.33 3.80 11.26
60 1.14 3.10 4.66 18.06 1.14 4.53 18.06 1.37 5.89 23.47 1.66 4.76 14.08
72 1.37 3.73 5.59 21.66 1.37 5.44 21.66 1.64 7.07 28.16 2.00 5.71 16.90
M
spec
(Nm/cm)
The Table includes the transmissible circumferential forces with 6 and
12 teeth in mesh at 10 mm and maximum belt width in each case. The
circumferential force S
zul
(N) is based on the maximum width from the
combination of standard timing belt and standard pulley.
The values in the Table are based not on the maximum tensile
strength of the belt, but on the lower shear strength of the belt teeth.
Intermediate values should be linearly interpolated.
Number of teeth on
the small pulley
z
k
Table 4.3: ZRL circumferential force and torque table
* Non stock, but 8M and 14M available ex stock as ZRL-M ** Maximum width from standard timing belts and standard pulleys
Number of
S
spec
(N/cm)
teeth in mesh
z
e
= 1 23.50 34.13 38.42 85.05 23.88 47.41 94.52 28.65 61.63 122.87 34.83 62.25 105.32
ZRL-V z
emax
= 6 141.0 204.8 230.5 510.3 143.3 284.5 567.1 171.9 369.8 737.2 209.0 73.5 631.9
ZRL-M z
emax
= 12 282.0 409.6 461.0 1020.6 286.6 567.0 1134.2 343.8 739.6 1474.4 418.0 747.0 1263.8
Number of
S
zul
(N) for maximum section width**
teeth in mesh
Width (mm)
9.5 25.4 76.2 101.6 25 50 100 25 50 100 25 85 115
ZRL-V z
emax
= 6 135 520 1760 5185 360 1425 5675 430 1850 7375 522.5 3175 7270
ZRL-M z
emax
= 12 270 1040 3520 10370 720 2850 11350 860 3700 14750 1045.0 6350 14540
XL L H XH T5 T10 T20 AT5 AT10 AT20* 5M* 8M* 14M*
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