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絲桿直徑 導程 螺距 螺紋
頭數(shù) 		螺紋高度 齒根圓直徑 外徑尺寸

塑料螺母

傳動效率

青銅螺母

傳動效率

In/mm in mm mm
in mm in mm
1/4
6.35mm 		0.05 1.27 1 0.95 0.175 4.45 0.25 6.35 0.3637 25.88%
0.0625 1.588 1.12 0.162 4.11 0.25 6.35 0.4229 30.87%
5/16
7.94mm 		0.07143 1.814 1 0.91 0.241 6.12 0.313 7.94 0.3849 27.63%
0.25 6.35 3.175 2 1.24 0.215 5.46 0.313 7.94 0.6732 55.22%
3/8
9.525mm 		0.062 1.575 1 1.13 0.286 7.26 0.375 9.525 0.314 21.86%
0.08333 2.116 1.05 0.292 7.41 0.375 9.525 0.3774 27%
0.1 2.54 1.18 0.282 7.16 0.375 9.525 0.4236 30.93%
0.125 3.175 1.23 0.278 7.06 0.375 9.525 0.4781 35.78%
0.166 4.216 2.108 2 1.42 0.263 6.68 0.375 9.525 0.5501 42.56%
0.2 5.08 2.54 1.18 0.282 7.16 0.375 9.525 0.5853 46.04%
0.25 6.35 3.175 1.23 0.278 7.06 0.375 9.525 0.6333 50.96%
7/16
11.11mm 		0.08333 2.116 1 1.05 0.354 9 0.438 11.11 0.3388 23.84%
1/2
12.7mm 		0.1 2.54 1 1.8 0.359 9.12 0.5 12.7 0.3616 25.7%
0.2 5.08 2.54 2 1.38 0.391 9.93 0.5 12.7 0.5158 39.27%
0.25 6.35 3.175 2.13 0.332 8.43 0.5 12.7 0.5824 45.75%
5/8
15.875mm 		0.1 2.54 1 1.38 0.516 13.1 0.625 15.88 0.2997 20.74%
0.125 3.175 2.13 0.457 11.6 0.625 15.88 0.3596 25.53%
0.2 5.08 3.15 0.377 9.57 0.625 15.88 0.4881 36.69%
0.2 5.08 2.54 2 1.8 0.484 12.3 0.625 15.88 0.4641 34.51%
3/4
19.05mm 		0.1 2.54 1 1.8 0.608 15.44 0.75 19.05 0.2649 18.07%
0.166 4.216 2.7 0.537 13.64 0.75 19.05 0.3842 27.62%
0.2 5.08 3.15 0.502 12.7 0.75 19.05 0.435 31.93%
0.333 8.46 4.23 2 2.7 0.537 13.64 0.75 19.05 0.5488 42.43%
7/8
22.225mm 		0.1667 4.2342 1 2.7 0.661 16.8 0.875 22.23 0.3455 24.82%
1
25.4mm 		0.1 2.54 1 1.4 0.889 22.6 1 25.4 0.2062 13.73%
0.167 4.2418 1.82 0.857 21.77 1 25.4 0.3052 21.17%
0.2 5.08 3.17 0.75 19.05 1 25.4 0.3572 25.33%
0.25 6.35 3.84 0.698 17.73 1 25.4 0.4158 30.26%
0.5 12.7 6.35 2 3.84 0.698 17.73 1 25.4 0.5781 45.31%
1-1/8
28mm 		0.2 5.08 1 3.17 0.875 22.23 1.125 28.58 0.3277 22.95%
1-1/4
32mm 		0.2 5.08 1 3.2 0.999 25.37 1.25 31.75 0.3029 20.99%
0.25 6.35 3.875 0.947 24 1.25 31.75 0.3565 25.28%
1-3/8
35mm 		0.25 6.35 1 3.16 1.125 28.6 1.375 34.93 0.3276 22.94%
1-1/2
38mm 		0.1 2.54 1 1.84 1.355 34.42 1.5 38.1 0.147 9.55%