Machinery's Handbook, 31st Edition
Light Duty V-Belts 2591 Sheave Dimensions: Groove angles and dimensions for sheaves and various sheave tol erances are given in Table 23. Table 23. Light Duty V-Belt Sheave and Groove Dimensions ANSI/RMA IP-23, 1968 b g K K b g b g α Break corners b g α b g α a
d B
d B
h g
h g
h g
α
α
Effective outside diameter
Effective outside diameter
Effective outside diameter
Effective Outside Diameter
α Groove Angle ± 0 ° 20' (deg)
d B Ball Diameter ± 0.0005 2 K
Belt Section
Min. Recomm.
h g (min)
b g (Ref)
2 a a
Range
Less than 1.50 1.50 to 1.99 2.00 to 2.50 Less than 2.20 2.20 to 3.19 3.20 to 4.20 Over 2.50 Less than 2.65 2.65 to 3.24 3.25 to 5.65 Less than 3.95 3.95 to 4.94 4.95 to 7.35 Over 4.20 Over 5.65
32 34 36 38 32 34 36 38 30 32 34 38 30 32 34 38
0.176 0.182 0.188 0.194 0.177 0.191 0.203 0.215 0.299 0.316 0.331 0.358 0.385 0.406 0.426
2L
0.8
0.2188
0.240 0.250 0.04
3L
1.5
0.3125
0.364 0.406 0.06
4L
2.5
0.4375
0.490 0.490 0.10
5L
3.5
0.5625
0.630 0.580 0.16
Over 7.35 0.461 a The diameter used in calculating speed ratio and belt speed is obtained by subtracting the 2 a value from the Effective Outside Diameter of the sheave.
Other Sheave Tolerances
Outside Diameter Eccentricity a For outside diameters:
Groove Side Wobble & Runout a For outside diameters:
Outside Diameters
For outside diameters:
20.0 in. and under
0.0015 in. per inch of outside diameter.
Under 6.0 in.
± 0.015 in. 10.0 in. and under
0.010 in.
± 0.020 in. For each additional inch of
6.0 to 12.0 in.
outside diameter, add 0.0005 in.
For each additional inch of outside diameter, add 0.0005 in.
Over 12.0 in.
± 0.040 in.
a Total indicator reading. All dimensions in inches.
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