Table 14. (Continued) Torsion Spring Deflections
AMW Wire Gauge Decimal Equivalent a Design Stress, kpsi
16 .037 192
17 .039 190
18 .041 188
19 .043 187
20 .045 185
21 .047 184
22 .049 183
23 .051 182
24 .055 180
25 .059 178
26 .063 176
27 .067 174
28 .071 173
29 .075 171
30 .080 169
Torque, pound-inch .9550
1.107
1.272
1.460
1.655
1.876
2.114
2.371
2.941
3.590
4.322
5.139
6.080
7.084
8.497
Deflection, degrees per coil
Inside Diameter, inch
29.29 30.87 32.45 34.02 35.60 37.18 38.76 40.33
28.09 29.59 31.10 32.61 34.12 35.62 37.13 38.64
25.93 27.32 28.70 30.08 31.46 32.85 34.23 35.61
24.07 25.35 26.62 27.89 29.17 30.44 31.72 32.99
22.44 23.62 24.80 25.98 27.16 28.34 29.52 30.70
21.37 22.49 23.60 24.72 25.83 26.95 28.07 29.18
20.18 21.23 22.28 23.33 24.37 25.42 26.47 27.52
19.01 19.99 20.97 21.95 22.93 23.91 24.89 25.87
17.76 18.67 19.58 20.48 21.39 22.30 23.21 24.12
0.53125 0.5625 0.59375
39.86 42.05 44.24 46.43 48.63 50.82 53.01 55.20
37.55 39.61 41.67 43.73 45.78 47.84 49.90 51.96
35.47 37.40 39.34 41.28 43.22 45.15 47.09 49.03
33.76 35.59 37.43 39.27 41.10 42.94 44.78 46.62
32.02 33.76 35.50 37.23 38.97 40.71 42.44 44.18
30.60 32.25 33.91 35.56 37.22 38.87 40.52 42.18
17 ∕ 32 9 ∕ 16 19 ∕ 32
0.625
5 ∕ 8
0.65625 0.6875 0.71875
21 ∕ 32 11 ∕ 16 23 ∕ 32
0.750
3 ∕ 4
Wire Gauge a, b or Size and Decimal Equivalent
31 .085 167
32 .090 166
33 .095 164
34 .100 163
35 .106 161
36 .112 160
37 .118 158
10 .135 161
9 .1483
8 .162 154
7 .177 150
6 .192 146
5 .207
1 ∕ 8 .125 156
5 ∕ 32 .1563
3 ∕ 16 .1875
Design Stress, kpsi 143 Torque, pound-inch 10.07 11.88 13.81 16.00 18.83 22.07 25.49 29.92 38.90 50.60 58.44 64.30 81.68 96.45 101.5 124.6 Inside Diameter, inch Deflection, degrees per coil 17 ∕ 32 0.53125 16.65 15.76 14.87 14.15 13.31 12.64 11.96 11.26 10.93 9.958 9.441 9.064 8.256 7.856 7.565 7.015 9 ∕ 16 0.5625 17.50 16.55 15.61 14.85 13.97 13.25 12.53 11.80 11.44 10.42 9.870 9.473 8.620 8.198 7.891 7.312 19 ∕ 32 0.59375 18.34 17.35 16.35 15.55 14.62 13.87 13.11 12.34 11.95 10.87 10.30 9.882 8.984 8.539 8.218 7.609 5 ∕ 8 0.625 19.19 18.14 17.10 16.25 15.27 14.48 13.68 12.87 12.47 11.33 10.73 10.29 9.348 8.881 8.545 7.906 21 ∕ 32 0.65625 20.03 18.93 17.84 16.95 15.92 15.10 14.26 13.41 12.98 11.79 11.16 10.70 9.713 9.222 8.872 8.202 11 ∕ 16 0.6875 20.88 19.72 18.58 17.65 16.58 15.71 14.83 13.95 13.49 12.25 11.59 11.11 10.08 9.564 9.199 8.499 23 ∕ 32 0.71875 21.72 20.52 19.32 18.36 17.23 16.32 15.41 14.48 14.00 12.71 12.02 11.52 10.44 9.905 9.526 8.796 3 ∕ 4 0.750 22.56 21.31 20.06 19.06 17.88 16.94 15.99 15.02 14.52 13.16 12.44 11.92 10.81 10.25 9.852 9.093 a For sizes up to 26 gauge, the table values are for music wire with a modulus E of 29,500,000 psi; for sizes from 27 gauge to 1 ⁄ 8 inch diameter the table values are for music wire with a modulus of 28,500,000 psi; for sizes from 10 gauge to 1 ⁄ 8 inch diameter, the values are for oil-tempered MB with a modulus of 28,500,000 psi. b Gauges 31 through 37 are AMW gauges. Gauges 10 through 5 are Washburn and Moen. 158 156 149
Made with FlippingBook - Share PDF online