Table 14. (Continued) Torsion Spring Deflections
AMW Wire Gauge Decimal Equivalent a Design Stress, kpsi
8 .020 210
9 .022 207
10 .024 205
11 .026 202
12 .029 199
13 .031 197
14 .033 196
15 .035 194
16 .037 192
17 .039 190
18 .041 188
19 .043 187
20 .045 185
21 .047 184
22 .049 183
23 .051
182 Torque, pound-inch .1650 .2164 .2783 .3486 .4766 .5763 .6917 .8168 .9550 1.107 1.272 1.460 1.655 1.876 2.114 2.371 Inside Diameter, inch Deflection, degrees per coil 9 ∕ 32 0.28125 42.03 37.92 34.65 31.72 28.29 26.37 25.23 23.69 22.32 21.09 19.97 19.06 18.13 17.37 16.67 16.03 5 ∕ 16 0.3125 46.39 41.82 38.19 34.95 31.14 29.01 27.74 26.04 24.51 23.15 21.91 20.90 19.87 19.02 18.25 17.53 11 ∕ 32 0.34375 50.75 45.73 41.74 38.17 33.99 31.65 30.25 28.38 26.71 25.21 23.85 22.73 21.60 20.68 19.83 19.04 3 ∕ 8 0.375 55.11 49.64 45.29 41.40 36.84 34.28 32.76 30.72 28.90 27.26 25.78 24.57 23.34 22.33 21.40 20.55 13 ∕ 32 0.40625 59.47 53.54 48.85 44.63 39.69 36.92 35.26 33.06 31.09 29.32 27.72 26.41 25.08 23.99 22.98 22.06 7 ∕ 16 0.4375 63.83 57.45 52.38 47.85 42.54 39.56 37.77 35.40 33.28 31.38 29.66 28.25 26.81 25.64 24.56 23.56 15 ∕ 32 0.46875 68.19 61.36 55.93 51.00 45.39 42.20 40.28 37.74 35.47 33.44 31.59 30.08 28.55 27.29 26.14 25.07 1 ∕ 2 0.500 72.55 65.27 59.48 54.30 48.24 44.84 42.79 40.08 37.67 35.49 33.53 31.92 30.29 28.95 27.71 26.58
AMW Wire Gauge Decimal Equivalent a Design Stress, kpsi
24 .055 180
25 .059 178
26 .063 176
27 .067 174
28 .071 173
29 .075 171
30 .080 169
31 .085 167
32 .090 166
33 .095 164
34 .100 163
35 .106 161
36 .112 160
37 .118 158
1 ∕ 8 125 156
3.590
4.322
5.139
6.080
7.084
8.497
10.07
11.88
13.81
16.00
18.83
22.07
25.49
29.92
Torque, pound-inch 2.941
Deflection, degrees per coil
Inside Diameter, inch
0.28125 0.3125 0.34375
14.88 16.26 17.64 19.02 20.40 21.79 23.17 24.55
13.88 15.15 16.42 17.70 18.97 20.25 21.52 22.80
13.00 14.18 15.36 16.54 17.72 18.90 20.08 21.26
12.44 13.56 14.67 15.79 16.90 18.02 19.14 20.25
11.81 12.85 13.90 14.95 15.99 17.04 18.09 19.14
11.17 12.15 13.13 14.11 15.09 16.07 17.05 18.03
10.50 11.40 12.31 13.22 14.13 15.04 15.94 16.85
9.897 10.74 11.59 12.43 13.28 14.12 14.96 15.81
9.418 10.21 11.00 11.80 12.59 13.38 14.17 14.97
8.934 9.676 10.42 11.16 11.90 12.64 13.39 14.13
8.547 9.248 9.948 10.65 11.35 12.05 12.75 13.45
8.090 8.743 9.396 10.05 10.70 11.35 12.01 12.66
7.727 8.341 8.955 9.569 10.18 10.80 11.41 12.03
7.353 7.929 8.504 9.080 9.655 10.23 10.81 11.38
6.973 7.510 8.046 8.583 9.119 9.655 10.19
9 ∕ 32 5 ∕ 16 11 ∕ 32
0.375
3 ∕ 8
0.40625 0.4375 0.46875
13 ∕ 32 7 ∕ 16 15 ∕ 32
1 ∕ 2 10.73 a For sizes up to 13 gauge, the table values are for music wire with a modulus E of 29,000,000 psi; and for sizes from 27 to 31 gauge, the values are for oil-tempered MB with a modulus of 28,500,000 psi. 0.500
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