絲攻加工下孔徑選用表 |
梅華 |
W英制螺紋 |
|||
螺紋尺寸 |
牙數 |
建議孔徑 |
最小尺寸 | 最大尺寸 |
1/16 |
60 |
1.08 |
1.05 |
1.11 |
3/32 |
48 |
1.75 |
1.70 |
1.79 |
1/8 |
40 |
2.41 |
2.36 |
2.46 |
5/32 |
32 |
3.02 |
2.95 |
3.08 |
3/16 |
24 |
3.49 |
3.41 |
3.58 |
7/32 |
24 |
4.29 |
4.20 |
4.37 |
1/4 |
20 |
4.83 |
4.72 |
4.93 |
5/16 |
18 |
6.24 |
6.13 |
6.36 |
3/8 |
16 |
7.62 |
7.49 |
7.75 |
7/16 |
14 |
8.94 |
8.79 |
9.08 |
1/2 |
12 |
10.16 |
9.99 |
10.33 |
9/16 |
12 |
11.75 |
11.58 |
11.92 |
5/8 |
11 |
13.10 |
12.92 |
13.29 |
3/4 |
10 |
16.00 |
15.80 |
16.20 |
7/8 |
9 |
18.84 |
18.61 |
19.06 |
1 |
8 |
21.59 |
21.33 |
21.84 |
1.1/8 |
7 |
24.22 |
23.93 |
24.51 |
1.1/4 |
7 |
27.40 |
27.10 |
27.68 |
1.3/8 |
6 |
29.85 |
29.50 |
30.18 |
1.1/2 |
6 |
33.02 |
32.68 |
33.36 |
1.5/8 |
5 |
35.18 |
34.77 |
35.58 |
1.3/4 |
5 |
38.35 |
37.94 |
38.76 |
1.7/8 |
4.1/2 |
40.85 |
40.40 |
41.30 |
2 |
4.1/2 |
44.03 |
43.57 |
44.47 |
2.1/4 |
4.1/2 |
50.38 |
49.92 |
50.82 |
2.1/2 |
4 |
55.88 |
55.37 |
56.38 |