螺纹测试用三针及修正值

公制螺纹 a=60°
螺距 计算最佳三针 选用三针 修正值
0.25 0.1443 0.142 0.2095
0.50 0.2887 0.291 0.4400
1.00 0.5774 0.572 0.8500
1.50 0.8660 0.866 1.2990
1.75 1.0104 1.008 1.5085
2.00 1.1547 1.157 1.7389
2.50 1.4434 1.441 2.1579
3.00 1.7321 1.732 2.5979
3.50 2.0207 2.020 3.0289
4.00 2.3094 2.311 3.4689


美标统一螺纹 a=60°
牙数 螺距 计算最佳三针 选用三针 修正值
36 0.7056 0.40740 0.433 0.688
32 0.7938 0.4583 0.433 0.6116
32 0.7938 0.4583 0.511 0.8456
28 0.9071 0.5237 0.511 0.7474
28 0.9071 0.5237 0.572 0.9304
27 0.9407 0.5431 0.572 0.9013
24 1.0583 0.6110 0.572 0.7995
24 1.0583 0.6110 0.724 1.2555
20 1.2700 0.7332 0.724 1.0721
20 1.2700 0.7332 0.796 1.2881
18 1.4111 0.8147 0.796 1.1659
18 1.4111 0.8147 0.866 1.3759
16 1.5875 0.9165 0.866 1.2232
16 1.5875 0.9165 1.008 1.6492
14 1.8143 1.0475 1.008 1.4528
14 1.8143 1.0475 1.157 1.8998
12 2.1167 1.2221 1.157 1.6379
12 2.1167 1.2221 1.302 2.0729
11 2.3091 1.3332 1.302 1.9063
11 2.3091 1.3332 1.441 2.3233
10 2.5400 1.4665 1.441 2.1233
10 2.5400 1.4665 1.553 2.4593


英制螺纹 a=55°
牙数 螺距 计算最佳三针 选用三针 修正值
24 1.0583 0.5966 0.572 0.7942
20 1.2700 0.7159 0.724 1.0721
19 1.3368 0.7536 0.724 1.0079
19 1.3368 0.7536 0.796 1.2359
18 1.4111 0.7954 0.796 1.1645
16 1.5875 0.8949 0.866 1.2167
16 1.5875 0.8949 1.008 1.6662
14 1.8143 1.0227 1.008 1.4484
14 1.8143 1.0227 1.047 1.5719
12 2.1167 1.1931 1.157 1.6297
11 2.3091 1.3016 1.302 1.9039
10 2.5400 1.4318 1.441 2.1221
9 2.8222 1.5909 1.591 2.3259
8 3.1750 1.7897 1.732 2.4334
8 3.1750 1.7897 1.833 2.7531
7 3.6286 2.0454 2.050 3.0044