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攻丝和钻孔直径的对应表
公称直径D 螺距P 内螺纹小径D1 内螺纹小径D1
内螺纹小径D1 内螺纹小径D1 麻花钻直径d
D P D1 D1 D1 D1 d
2.5 0.35 2.201 2.221 - 2.121 2.15
3 0.35 2.701 2.721 - 2.621 2.65
3.5 0.35 3.201 3.221 - 3.121 3.1
4 0.5 3.571 3.599 3.639 3.459 3.5
4.5 0.5 4.071 4.099 4.139 3.959 4
5 0.5 4.571 4.599 4.639 4.459 4.5
5.5 0.5 5.071 5.099 5.139 4.959 5
6 0.75 5.388 5.378 5.424 5.188 5.2
7 0.75 6.388 6.378 6.424 6.188 6.2
8 0.75 7.388 7.378 7.424 7.188 7.2
9 0.75 8.388 8.378 8.424 8.188 8.2
10 0.75 9.388 9.378 9.424 9.188 9.2
11 0.75 10.388 10.378 10.424 10.188 10.2
8 1 7.107 7.153 7.217 6.917 7
9 1 8.107 8.153 8.217 7.917 8
10 1 9.107 9.153 9.217 8.917 9
11 1 10.107 10.153 10.217 9.917 10
12 1 11.107 11.153 11.217 10.917 11
14 1 13.107 13.153 13.217 12.917 13
15 1 14.107 14.153 14.217 13.917 14
16 1 15.107 15.153 15.217 14.917 15
17 1 16.107 16.153 16.217 15.917 16
18 1 17.107 17.153 17.217 16.917 17
20 1 19.107 19.153 19.217 18.917 19
22 1 21.107 21.153 21.217 20.917 21
24 1 23.107 23.153 23.217 22.917 23
25 1 24.107 24.153 24.217 23.917 24
27 1 26.107 26.153 26.217 25.917 26
28 1 27.107 27.153 27.217 26.917 27
30 1 29.107 29.153 29.217 28.917 29
10 1.25 8.859 8.912 8.982 8.647 8.8
12 1.25 10.859 10.912 10.982 10.647 10.8
14 1.25 12.859 12.912 12.982 12.647 12.8
12 1.5 10.612 10.676 10.751 10.376 10.5
14 1.5 12.612 12.676 12.751 12.376 12.5
15 1.5 13.612 13.676 13.751 13.376 13.5
16 1.5 14.612 14.676 14.751 14.376 14.5
17 1.5 15.612 15.676 15.751 15.376 15.5
18 1.5 16.612 16.676 16.751 16.376 16.5
20 1.5 18.612 18.676 18.751 18.376 18.5
22 1.5 20.612 20.676 20.751 20.376 20.5
24 1.5 22.612 22.676 22.751 22.376 22.5
25 1.5 23.612 23.676 23.751 23.376 23.5
26 1.5 24.612 24.676 24.751 24.376 24.5
27 1.5 25.612 25.676 25.751 25.376 25.5
28 1.5 26.612 26.676 26.751 26.376 26.5
30 1.5 28.612 28.676 28.751 28.376 28.5
32 1.5 30.612 30.676 30.751 30.376 30.5
33 1.5 31.612 31.676 31.751 31.376 31.5
35 1.5 33.612 33.676 33.751 33.376 33.5
36 1.5 34.612 34.676 34.751 34.376 34.5
38 1.5 36.612 36.676 36.751 36.376 36.5
39 1.5 37.612 37.676 37.751 37.376 37.5
40 1.5 38.612 38.676 38.751 38.376 38.5
42 1.5 40.612 40.676 40.751 40.376 40.5
45 1.5 43.612 43.676 43.751 43.376 43.5
48 1.5 46.612 46.676 46.751 46.376 46.5
50 1.5 48.612 48.676 48.751 48.376 48.5
52 1.5 50.612 50.676 50.751 50.376 50.5
18 2 16.135 16.21 16.31 15.835 16
20 2 18.135 18.21 18.31 17.835 18
22 2 20.135 20.21 20.31 19.835 20
24 2 22.135 22.21 22.31 21.835 22
25 2 23.135 23.21 23.31 22.835 23
27 2 25.135 25.21 25.31 24.835 25
28 2 26.135 26.21 26.31 25.835 26
30 2 28.135 28.21 28.31 27.835 28
32 2 30.135 30.21 30.31 29.835 30
33 2 31.135 31.21 31.31 30.835 31
36 2 34.135 34.21 34.31 33.835 34
39 2 37.135 37.21 37.31 36.835 37
40 2 38.135 38.21 38.31 37.835 38
42 2 40.135 40.21 40.31 39.835 40
45 2 43.135 43.21 43.31 42.835 43
48 2 46.135 46.21 46.31 45.835 46
50 2 48.135 48.21 48.31 47.835 48
52 2 50.135 50.21 50.31 49.835 50
30 3 27.152 27.252 27.382 26.752 27
33 3 30.152 30.252 30.382 29.752 30
36 3 33.152 33.252 33.382 32.752 33
39 3 36.152 36.252 36.382 35.752 36
40 3 37.152 37.252 37.382 36.752 37
42 3 39.152 39.252 39.382 38.752 39
45 3 42.152 42.252 42.382 41.752 42
48 3 45.152 45.252 45.382 44.752 45
50 3 47.152 47.252 47.382 46.752 47
52 3 49.152 49.252 49.382 48.752 49
42 4 38.145 38.27 38.42 37.67 38
52 4 48.145 48.27 48.42 47.67 48
45 4 41.145 41.27 41.42 40.67 41
48 4 44.145 44.27 44.42 43.67 44
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