Table 5. Compression and Extension Spring Deflections a Wire Size or Washburn and Moen Gauge, and Decimal Equivalent b
Spring Outside Dia.
19
18
17
16
.010 .012 .014 .016 .018
.020
.022
.024
.026
.028
.030
.032
.034
.036
.038
.041 .0475 .054 .0625
Deflection f (inch) per coil, at Load P (pounds) c
Nom. Dec.
… … … … … … … … … … … … … … … …
7 ∕ 64 .1094 .0277 .0222 .01824 .01529 .01302 .01121 .00974 .00853 .00751 .00664 .00589 .395 .697 1.130 1.722 2.51 3.52 4.79 6.36 8.28 10.59 13.35
… … … … … … … … … …
1 ∕ 8 .125 .0371 .0299 .0247 .0208 .01784 .01548 .01353 .01192 .01058 .00943 .00844 .00758 .00683 .00617
.342 .600 .971 1.475 2.14
2.99
4.06 3.53 3.11 2.79
5.37 4.65 4.10 3.67
6.97 6.02 5.30 4.73
8.89 11.16 13.83 16.95 20.6
… … … … … … … …
9 ∕ 64 .1406 .0478 .0387 .0321 .0272 .0234 .0204 .01794 .01590 .01417 .01271 .01144 .01034 .00937 .00852 .00777 .301 .528 .852 1.291 1.868 2.61 7.66 9.58 11.84 14.47 17.51 21.0
… … … … … …
5 ∕ 32 .1563 .0600 .0487 .0406 .0345 .0298 .0261 .0230 .0205 .01832 0.1649 .01491 .01354 .01234 .01128 .01033 .00909 8.39 10.35 12.62 15.23 18.22 23.5
.268 .470 .758 1.146 1.656 2.31 .243 .424 .683 1.031 1.488 2.07
6.72 5.99
… … … …
11 ∕ 64 .1719 .0735 .0598 .0500 .0426 .0369 .0324 .0287 .0256 .0230 .0208 .01883 .01716 .01569 .01439 .01324 .01172 .00914
7.47
9.19 11.19 13.48 16.09 21.8
33.8
3 ∕ 16 .1875 .0884 .0720 .0603 .0516 .0448 .0394 .0349 .0313 .0281 .0255 .0232 .0212 .01944 .01788 .01650 .01468 .01157 .00926 … .221 .387 .621 .938 1.351 1.876 2.53 3.32 4.27 5.40 6.73 8.27 10.05 12.09 14.41 18.47 30.07 46.3 … 13 ∕ 64 .2031 .1046 .0854 .0717 .0614 .0534 .0470 .0418 .0375 .0338 .0307 .0280 .0257 .0236 .0218 .0201 .01798 .01430 .01155 … .203 .355 .570 .859 1.237 1.716 2.31 3.03 3.90 4.92 6.12 7.52 9.13 10.96 13.05 16.69 27.1 41.5 … 7 ∕ 32 .2188 … .1000 .0841 .0721 .0628 .0555 .0494 .0444 .0401 .0365 .0333 .0306 .0282 .0260 .0241 .0216 .01733 .01411 .01096 … .328 .526 .793 1.140 1.580 2.13 2.79 3.58 4.52 5.61 6.88 8.35 10.02 11.92 15.22 24.6 37.5 61.3 15 ∕ 64 .2344 … .1156 .0974 .0836 .0730 .0645 .0575 .0518 .0469 .0427 .0391 .0359 .0331 .0307 .0285 .0256 .0206 .01690 .01326 … .305 .489 .736 1.058 1.465 1.969 2.58 3.21 4.18 5.19 6.35 7.70 9.23 10.97 13.99 22.5 34.3 55.8 1 ∕ 4 .250 … … .1116 .0960 .0839 .0742 .0663 .0597 .0541 .0494 .0453 .0417 .0385 .0357 .0332 .0299 .0242 .01996 .01578 … … .457 .687 .987 1.366 1.834 2.40 3.08 3.88 4.82 5.90 7.14 8.56 10.17 12.95 20.8 31.6 51.1 9 ∕ 32 .2813 … … .1432 .1234 .1080 .0958 .0857 .0774 .0703 .0643 .0591 .0545 .0505 .0469 .0437 .0395 .0323 .0268 .0215 … … .403 .606 .870 1.202 1.613 2.11 2.70 3.40 4.22 5.16 6.24 7.47 8.86 11.26 18.01 27.2 43.8 5 ∕ 16 .3125 … … … .1541 .1351 .1200 .1076 .0973 .0886 .0811 .0746 .0690 .0640 .0596 .0556 .0504 .0415 .0347 .0281 … … … .542 .778 1.074 1.440 1.881 2.41 3.03 3.75 4.58 5.54 6.63 7.85 9.97 15.89 23.9 38.3 11 ∕ 32 .3438 … … … … .1633 .1470 .1321 .1196 .1090 .0999 .0921 .0852 .0792 .0733 .0690 .0627 .0518 .0436 .0355 … … … … .703 .970 1.300 1.697 2.17 2.73 3.38 4.12 4.98 5.95 7.05 8.94 14.21 21.3 34.1 3 ∕ 8 .375 … … … … … .1768 .1589 .1440 .1314 .1206 .1113 .1031 .0960 .0895 .0839 .0764 .0634 .0535 .0438 … … … … … .885 1.185 1.546 1.978 2.48 3.07 3.75 4.53 5.40 6.40 8.10 12.85 19.27 30.7 a This table is for ASTM A229 oil tempered spring steel with a torsional modulus G of 11,200,000 psi, and an uncorrected torsional stress of 100,000 psi. For other materials use the following factors: stainless steel, multiply f by 1.067; spring brass, multiply f by 2.24; phosphor bronze, multiply f by 1.867; Monel metal, multiply f by 1.244; beryllium copper, multiply f by 1.725; Inconel (non-magnetic), multiply f by 1.045. b Round wire. For square wire, multiply f by 0.707, and p , by 1.2 c The upper figure is the deflection and the lower figure the load as read against each spring size. Note: Intermediate values can be obtained within reasonable accuracy by interpolation.
Made with FlippingBook - Share PDF online