Groove Dimensions forVee Belt Sheaves
| Belt
Section |
Pitch Diameter | Groove
Angle |
Standard Groove Dimensions | Deep Groove Dimensions | |||||||||
| Min.
Dia. (1) |
Range | W | D | X | S2 | E | W | D | X | S2 | E | ||
| ± ½º | (3) | ± .031 | ... | ± .031 | (4) | (3) | ± .031 | ... | ± .031 | (4) | |||
| A | 3.0 | 2.6-5.4
Over 5.4 |
34º
38º |
.494
.504 |
.490 | .125 | 5/8 | 3/8 | .589
.611 |
.645 | .280 | 3/4 | 7/16 |
| B | 5.4 | 4.6-7.0
Over 7.0 |
34º
38º |
.637
.650 |
.580 | .175 | 3/4 | 1/2 | .747
.774 |
.760 | .355 | 7/8 | 9/16 |
| C | 9.0 | 7.0-7.99
8.0-12.0 Over 12.0 |
34º
36º 38º |
.879
.887 .895 |
.780 | .200 | 1 | 11/16 | 1.066
1.085 1.105 |
1.085 | .505 | 1-1/4 | 13/16 |
| D | 13.0 | 12.0-12.99
13.0-17.0 Over 17.0 |
34º
36º 38º |
1.259
1.271 1.283 |
1.050 | .300 | 1-7/16 | 7/8 | 1.513
1.541 1.569 |
1.465 | .715 | 1-3/4 | 1-1/16 |
| E | 21.0 | 18.0-24.0
Over 24.0 |
36º
38º |
1.527
1.542 |
1.300 | .400 | 1-3/4 | 1-1/8 | 1.816
1.849 |
1.745 | .845 | 2-1/16 | 1-5/16 |
| All dimensions
in inches except groove angles arc in degrees.
(1)Minimum recommended pitch diameter. (2)Summation of the deviations from S for all grooves in any one sheave shall not exceed ±0.063 inch. (3)Tolerances for W: for A and B belts are = ± .005 inch; for C and I3 belts; ± .007 inch; and for E belt; ±.010 inch. (4)Tolerances for E: for A belts are, +.070. -.000 inch; for B and C belts, +.150, -.000 inch; and for D and E belts. +.250. -.000 inch. Outside Diameter Tolerances: Under 12 inches, ±.020 inch; 12.0 up to 24.0 inches, ±..20 inch; 24 up to 58 inches, ± .040 inch; 58.0 up to 72.0 inches, ±.120 inch; and for 72 inches and above, ±. 250 inch. Outside Diameter Eccentricity: For 10.0-inch pitch diameter axed under, .010 inch. Add .0005 inch for each additional inch of pitch diameter up to and including 60.0-inch pitch diameter. Add .001 inch for each additional inch of pitch diameter above 60 inches. Side Wobble and Runout: .001 inch per inch of pitch diameter up to 20 inches. Add .0005 inch for each additional inch of pitch diameter up to and including 60.0 inches. Add .001 inch for each additional inch of pitch diameter above 60.0 inches. |
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