Table 5. (Continued) Compression and Extension Spring Deflections a
Wire Size or Washburn and Moen Gauge, and Decimal Equivalent
Spring Outside Dia.
11
10
9
8
7
6
5
4
3
2
0
1 ∕ 8
5 ∕ 32
3 ∕ 16
7 ∕ 32
1 ∕ 4
9 ∕ 32
5 ∕ 16
.1205 .125
.135 .1483 .1563 .162
.177 .1875 .192
.207 .2188 .2253 .2437 .250 .2625 .2813 .3065 .3125
Deflection f (inch) per coil, at Load P (pounds)
Nom.
Dec.
.443 49.8 .527 45.7 .619 42.2 .717 39.2 .769 37.8 .823 36.6 .878 35.4 .936 34.3 .995 33.3
.424 55.8 .505 51.1 .593 47.2 .687 43.8 .738 42.3 .789 40.9 .843 39.6 .898 38.3 .955 37.2
.387 70.8 .461 64.8 .542 59.8 .629 55.5 .676 53.6 .723 51.8 .768 50.1 .823 48.5 .876 47.1
.350
.324
.310
.277
.258
.250
.227 269. .273
.210 321. .254 292. .301 269. .351 248. .379 239. .407
.202 .1815 .1754 .1612 .1482 .1305 .1267
1.500
1 1 ∕ 2
94.8 111.5 124.5 164.6 197.1 213.
352. .244 321. .290 295. .339 272. .365 262. .392 253. .421 245. .449 236. .479 229. .511 222. .542
452. .220 411. .261 377. .306 348. .331 335. .355 324. .381 312. .407 302. .435 292. .463 283. .493 275. .523 267. .554 259. .586
499.
574.
717.
947.
1008.
.413
.387
.370
.332
.309
.300
.212 .1986 .1801 .1592 .1547
1.625
1 5 ∕ 8
86.7 102.0 113.9 150.3 180.0 193.9 246.
446. .253 409. .296 378. .320 364. .344 351. .369 339. .395 327. .421 317. .449 307. .478 298. .507 289. .537 281. .568
521. .237 477. .278 440. .300 425. .323 409. .346 395. .371 381. .396 369. .423 357. .449 347. .477 336. .506 327. .536
650.
858.
912.
.485 80.0 .564 74.2 .605 71.6 .649 69.2 .693 66.9 .739 64.8 .786 62.8 .835 60.9 .886 59.2
.456
.437
.392
.366
.355
.323
.215 .1908 .1856
1.750
1 3 ∕ 4
94.0 104.9 138.5 165.6 178.4 226.
595. .253 548. .273 528. .295 509. .316 491. .339 474. .362 459. .387 444. .411 430. .437 417. .464 405. .491 394.
783. .225 721. .243 693. .263 668. .282 644. .303 622. .324 601. .346 582. .368 564. .392 547. .416 531. .441 516.
833. .219 767. .237 737. .256 710. .275 685. .295 661. .316 639. .337 618. .359 599. .382 581. .405 564. .430
.530 87.2 .569 84.2 .610 81.3 .652 78.7 .696 76.1 .740 73.8 .787 71.6 .834 69.5 .884 67.6 .934 65.7
.508
.457
.426
.414
.377
1.875
1 7 ∕ 8
97.3 128.2 153.4 165.1 209.
.546
.492
.458
.446
.405
1.938
1 15 ∕ 16
93.8 123.6 147.9 159.2 201.
.585
.527
.492
.478
.436
2
2.000
90.6 119.4 142.8 153.7 194.3 231.
.626
.564
.526
.512
.467
.436
2.063
2 1 ∕ 16
87.6 115.4 138.1 148.5 187.7 223.
.667
.602
.562
.546
.499
.466
2.125
2 1 ∕ 8
84.9 111.8 133.6 143.8 181.6 216.
.711
.641
.598
.582
.532
.497
2.188
2 3 ∕ 16
82.2 108.3 129.5 139.2 175.8 209.
1.056 1.013 .930
.755
.681
.637
.619
.566
.529
2.250
2 1 ∕ 4
32.3
36.1
45.7
79.8 105.7 125.5 135.0 170.5 202.
1.119 1.074 .986
.801
.723
.676
.657
.601
.562
2.313
2 5 ∕ 16
31.4
35.1
44.4
77.5 101.9 121.8 131.0 165.4 196.3 215.
1.184 1.136 1.043 .938
.848 75.3 .897 73.2 .946 71.3
.763
.716
.696
.637
.596
.576
2.375
2 3 ∕ 8
30.5
34.1
43.1
57.5
99.1 118.3 127.3 160.7 190.7 209.
… … … …
1.201 1.102 .991
.810
.757
.737
.674
.631
.609
2.438
2 7 ∕ 16
33.2
42.0
56.0
96.3 115.1 123.7 156.1 185.3 203.
1.266 1.162 1.046 .986
.855
.800
.778
.713
.667
.644
2.500
2 1 ∕ 2
32.3 548. 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 . 40.9 54.5 64.0 93.7 111.6 120.4 151.9 180.2 197.5 252. 273. 317.
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