Page 253 - Power_Transmission

Standard pulley groove dimensions DIN2211/1 and BS3970
Classical V-belt pulleys | Narrow Wedge V-belt pulleys (DIN / BS / ISO) | Narrow wedge belt pulleys (RMA)

Nomenclature: F
Į Pulley groove included angle (°)
OD Outside diameter b 1
PD Effective (pitch) diameter b d
b d Effective width at pitch line c
b 1 Groove top width t
c Distance from pitch to outside diameter (= OD - PD/2)
e Transverse pitch of grooves (to centers)
f Minimum recommended distance from edge of pulley to center of
first groove O D PD
t Total groove depth e f

Classical V-belt pulleys
Classical belt Pitch diameter range Groove angle Dimensions
series

Į b 1 b d t c e
– mm ° mm

13/A-17/B 85 - 170 34 15,55 15,88 19,05 4,45 12,70
Over 170 38 15,88 19,05 4,45 12,70
22/C 178 - 203 34 22,33 19,81 25,40 5,08 17,48
203 - 305 36 22,53 19,81 25,40 5,08 17,48
Over 305 38 22,73 19,81 25,40 5,08 17,48
32/D 305 - 330 34 31,98 26,67 36,53 7,62 22,23
330 - 432 36 32,28 26,67 36,53 7,62 22,23
Over 432 38 32,59 26,67 36,53 7,62 22,23
40/E 457 - 610 36 38,79 33,02 44,45 10,16 31,24
Over 610 38 39,17 33,02 44,45 10,16 31,24

Narrow Wedge V-belt pulleys (DIN / BS / ISO)

Classical belt Pitch diameter range Groove angle Dimensions
series

Į b 1 b d t (+0.6/-0.0) c e f
– mm ° mm

SPZ Up to & incl. 80 34 9,7 8,5 11,00 2,00 12,0 ± 0,3 8,0
Over 80 38 9,7 8,5 11,00 2,00 12,0 ± 0,3 8,0
SPA Up to & incl. 118 34 12,7 11,0 14,00 2,80 15,0 ± 0,3 10,0
Over 118 38 12,7 11,0 14,00 2,80 15,0 ± 0,3 10,0
SPB Up to & incl. 190 34 16,2 14,4 18,00 3,50 19,0 ± 0,4 12,5
Over 190 38 16,2 14,4 18,00 3,50 19,0 ± 0,4 12,5
SPC Up to & incl. 315 34 22,0 19,0 24,00 4,80 25,5 ± 0,5 17,0
Over 315 38 22,0 19,0 24,00 4,80 25,5 ± 0,5 17,0

Narrow wedge belt pulleys (RMA)

RMA Belt Pitch diameter range Groove angle Dimensions
series

Į b 1 b d t c e f
– mm ° mm

3V, 3VX Up to & incl. 90 36 8,89 8,89 8,64 0,64 10,3 ± 0,4 8,74
Over 90 - 150 38 8,89 8,89 8,64 0,64 10,3 ± 0,4 8,74
Over150 - 305 40 8,89 8,89 8,64 0,64 10,3 ± 0,4 8,74
Over 305 42 8,89 8,89 8,64 0,64 10,3 ± 0,4 8,74
5V, 5VX Over 140 - 255 38 15,24 12,70 14,98 1,27 17,5 ± 0,4 3,20
Over 255 - 405 40 15,24 12,70 14,98 1,27 17,5 ± 0,4 3,20
Over 405 42 15,24 12,70 14,98 1,27 17,5 ± 0,4 3,20
8V, 8VX Over 315 - 405 38 25,40 25,40 25,15 2,54 28,6 ± 0,4 6,40
Over 405 - 570 40 25,40 25,40 25,15 2,54 28,6 ± 0,4 6,40
Over 570 42 25,40 25,40 25,15 2,54 28,6 ± 0,4 6,40

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