Technical Manual V-Belts
Design Hints Length Tolerances
Table 71: Wedge belts DIN 7753 Part 1 Length tolerance (mm) Permissible deviation from pitch length Section
Set tolerance (mm) Permissible difference between the pitch lengths Ld of the belts in one and the same set on multiple belt drives Optibelt DIN 7753 / ISO 4184
Pitch length (mm) Optibelt wrapped
SPZ/XPZ SPA/XPA SPB/XPB SPC/XPC
> 630 > 900 > 1 250 > 2 000 > 3 150 > 5 000 > 8 000 > 10 000
≤ ≤ ≤ ≤ ≤ ≤ ≤ ≤
900 1 250 2 000 3 150 5 000* 8 000 10 000 12 500
DIN DIN ±2 ±2 ±2 ±4 ±6 ±8
DIN 7753 ± ± ± ± ± ± ± ±
6 9 12 20 32 50 80 100
to to to to to to to to
± 9 ± 12 ± 20 ± 32 ± 50 ± 80 ± 100 ± 125
wrapped
raw edge
wrapped
raw edge
2 2 ±2 ±2 ±2 ±4 ±6 ±8
2 4 6 6 10*
2 2 2 4 6 10 16
2 4 6 6 10*
Table 72: Classical V-belts DIN 2215 Length tolerance (mm) Permissible deviation from pitch length Section
Set tolerance (mm) Permissible difference between the pitch lengths Ld of the belts in one and the same set on multiple belt drives Optibelt DIN 2215 / ISO 4184
Pitch length (mm) Optibelt
5 Y/6 8 Z/10; ZX/X10 A/13; AX/X13 B/17; BX/X17 20 C/22; CX/X22 25 D/32 E/40
≤ 250 > 250 ≤ 315 > 315 ≤ 400 > 400 ≤ 500 > 500 ≤ 630 > 630 ≤ 800 > 800 ≤ 900 > 900 ≤ 1 250 > 1 250 ≤ 1 600 > 1 600 ≤ 2 000 > 2 000 ≤ 2 500 > 2 500 ≤ 3 150 > 3 150 ≤ 4 000* > 4 000 ≤ 5 000 > 5 000 ≤ 6 300 > 6 300 ≤ 8 000 > 8 000 ≤ 10 000 >10 000 ≤ 12 500 >12 500 ≤ 15 000 >15 000 ≤ 20 000
wrapped
DIN 2215
wrapped
DIN DIN DIN DIN DIN DIN DIN DIN ±2 ±2 ±2 ±2 ±2 ±2 ±4 ±4 ±6 ±8 DIN DIN
+ 8/– 4 + 9/– 4 + 10/– 5 + 11/– 6 + 13/– 6 + 15/– 7 + 17/– 8 + 19/– 10 + 23/– 11 + 27/– 13 + 31/– 16 + 37/– 18 + 44/– 22 + 52/– 26 + 63/– 32 + 77/– 38 + 93/– 46 + 112/– 56 + 140/– 70 + 170/– 85
2 2 2 2 2 2 2 4 ±2 ±2 ±2 ±2 ±2 ±2 ±4 ±4 ±6 ±8 DIN DIN
raw edge
2 2 2 4 4 4 6 8 8*
wrapped
raw edge
2 2 2 2 2 2 2 4 4 4 8 8 12 12 20 20 32 32 48 48
2 2 2 2 2 2 2 4 4 4 8 8 12*
* Maximum production length for raw edge V-belts ≤ 3550 mm Optibelt S=C plus or Optibelt M=S V-belts can be used in sets without measuring or remeasuring. 145