Table 5. (Continued) Compression and Extension Spring Deflections a
Wire Size or Washburn and Moen Gauge, and Decimal Equivalent 19 18 17 16 15 .041 .0475 .054 .0625 .072 Deflection f (inch) per coil, at Load P (pounds) .038
Spring Outside Dia.
14
13
12
11
3 ∕ 32
1 ∕ 8
.026
.028
.030
.032
.034
.036
.080 .0915 .0938 .1055 .1205 .125
Nom. Dec.
13 ∕ 32 .4063 .1560 .1434 .1324 .1228 .1143 .1068 .1001 .0913 .0760 .0645 .0531 .0436 .0373 .0304 .0292 .0241
… … … …
1.815 2.28
2.82
3.44
4.15
4.95
5.85
7.41 11.73 17.56 27.9
43.9
61.6
95.6 103.7 153.3
7 ∕ 16 .4375 .1827 .1680 .1553 .1441 .1343 .1256 .1178 .1075 .0898 .0764 .0631 .0521 .0448 .0367 .0353 .0293 .0234 .0219 1.678 2.11 2.60 3.17 3.82 4.56 5.39 6.82 10.79 16.13 25.6 40.1 56.3 86.9 94.3 138.9 217. 245. 15 ∕ 32 .4688 .212 .1947 .1800 .1673 .1560 .1459 .1370 .1252 .1048 .0894 .0741 .0614 .0530 .0437 .0420 .0351 .0282 .0265 1.559 1.956 2.42 2.94 3.55 4.23 5.00 6.33 9.99 14.91 23.6 37.0 51.7 79.7 86.4 126.9 197.3 223. 1 ∕ 2 .500 .243 .223 .207 .1920 .1792 .1678 .1575 .1441 .1209 .1033 .0859 .0714 .0619 .0512 .0494 .0414 .0335 .0316 1.456 1.826 2.26 2.75 3.31 3.95 4.67 5.90 9.30 13.87 21.9 34.3 47.9 73.6 80.0 116.9 181.1 205. 17 ∕ 32 .5313 .276 .254 .235 .219 .204 .1911 .1796 .1645 .1382 .1183 .0987 .0822 .0714 .0593 .0572 .0482 .0393 .0371 1.366 1.713 2.12 2.58 3.10 3.70 4.37 5.52 8.70 12.96 20.5 31.9 44.6 68.4 74.1 108.3 167.3 188.8 9 ∕ 16 .5625 … .286 .265 .247 .230 .216 .203 .1861 .1566 .1343 .1122 .0937 .0816 .0680 .0657 .0555 .0455 .0430 … 1.613 1.991 2.42 2.92 3.48 4.11 5.19 8.18 12.16 19.17 29.9 41.7 63.9 69.1 100.9 155.5 175.3 19 ∕ 32 .5938 … … .297 .277 .259 .242 .228 .209 .1762 .1514 .1267 .1061 .0926 .0774 .0748 .0634 .0522 .0493 … … 1.880 2.29 2.76 3.28 3.88 4.90 7.71 11.46 18.04 28.1 39.1 60.0 64.8 94.4 145.2 163.6 5 ∕ 8 .625 … … .331 .308 .288 .270 .254 .233 .1969 .1693 .1420 .1191 .1041 .0873 .0844 .0718 .0593 .0561 … … 1.782 2.17 2.61 3.11 3.67 4.63 7.29 10.83 17.04 26.5 36.9 56.4 61.0 88.7 136.2 153.4 21 ∕ 32 .6563 … … … .342 .320 .300 .282 .259 .219 .1884 .1582 .1330 .1164 .0978 .0946 .0807 .0668 .0634 … … … 2.06 2.48 2.95 3.49 4.40 6.92 10.27 16.14 25.1 34.9 53.3 57.6 83.7 128.3 144.3 11 ∕ 16 .6875 … … … … .352 .331 .311 .286 .242 .208 .1753 .1476 .1294 .1089 .1054 .0901 .0748 .0710 … … … … 2.36 2.81 3.32 4.19 6.58 9.76 15.34 23.8 33.1 50.5 54.6 79.2 121.2 136.3 23 ∕ 32 .7188 … … … … … .363 .342 .314 .266 .230 .1933 .1630 .1431 .1206 .1168 .1000 .0833 .0791 … … … … … 2.68 3.17 3.99 6.27 9.31 14.61 22.7 31.5 48.0 51.9 75.2 114.9 129.2 3 ∕ 4 .750 … … … … … … .374 .344 .291 .252 .212 .1791 .1574 .1329 .1288 .1105 .0923 .0877 … … … … … … 3.03 3.82 5.99 8.89 13.94 21.6 30.0 45.7 49.4 71.5 109.2 122.7 25 ∕ 32 .7813 … … … … … … … .375 .318 .275 .232 .1960 .1724 .1459 .1413 .1214 .1017 .0967 … … … … … … … 3.66 5.74 8.50 13.34 20.7 28.7 43.6 47.1 68.2 104.0 116.9 13 ∕ 16 .8125 … … … … … … … .407 .346 .299 .253 .214 .1881 .1594 .1545 .1329 .1115 .1061 … … … … … … … 3.51 5.50 8.15 12.78 19.80 27.5 41.7 45.1 65.2 99.3 111.5 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, and other important footnotes, see page 321 .
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