Table 14. Double V-Belt Sheave and Groove Dimensions ANSI/RMA IP-21, 1984
File break all sharp corners
File break all sharp corners
Groove Angle α
Groove angle α
d B
d B
R B
a p h d
b g
b g
h g a p
h g
R B
h g
S g
S e
S e
S g
Nomenclature diameter
Face width of standard and deep groove sheaves = s g ( N g – 1) + 2 S e , where N g = number of grooves Standard Groove Dimensions Deep Groove Dimensions
Standard Groove Dimensions
Drive Design Factors
S g a ± 0.025
Min. Recomm. Outside Dia.
Cross Section
Outside Diameter Range
Groove Angle, α ± 0.33 °
d B ± 0.0005 0.4375
h g (Min.)
R B (Min.) 0.148 0.149 0.189 0.190
2 a b
2 h d
S e
b g
p
+0.090
Up through 5.65
34
0.494
0.250
0.625 0.375
3.25
0.0
AA
± 0.005 0.460
Over 5.65
38 34 38 34 38 34 36 38 34 36
0.504 0.637 0.650 0.612 0.625
( 7 ∕ 16 )
− 0.062 +0.120 − 0.065 +0.120 − 0.065
Up through 7.35
0.5625
BB
0.350
0.750 0.500
5.75
0.0
± 0.006 0.550
Over 7.35
16 )
( 9 ∕
Up through 7.35
A = 0.750 0.230 B = 0.350 0.226
0.5625
A = 3.620 B = 5.680
A = 0.370 B = − 0.070
AA-BB
0.750 0.500
± 0.006 0.612
Over 7.35
( 9 ∕ 16 )
Up through 8.39 Over 8.39 up to and including 12.40 Up through 13.59 Over 13.59 up to and including 17.60 Over 12.40
0.879 0.887 0.895
0.274 0.276 0.277
0.7812 ( 25 ∕ 32 )
CC
1.000 0.688 +0.160 − 0.070
} ± 0.007 0.750
0.400
9.4
0.0
1.259 1.271 1.283
0.410 0.410 0.411
1.1250 (1 1 ∕ 8 )
1.438 0.875 +0.220 − 0.080
DD
13.6
0.0
} ± 0.008 1.020
0.600
Over 17.60
38
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