公制螺纹钻底孔用钻头直径尺寸
公称
直径
|
螺距
t
|
钻头直径
dz
|
公称
直径
|
螺距
t
|
钻头直径
dz
|
1
|
粗
|
0.25
|
0.75
|
2
|
粗
|
0.4
|
1.6
|
细
|
0.25
|
0.8
|
细
|
0.25
|
1.75
|
3
|
粗
|
0.5
|
2.5
|
4
|
粗
|
0.7
|
3.3
|
细
|
0.35
|
2.65
|
细
|
0.5
|
3.5
|
5
|
粗
|
0.8
|
4.2
|
6
|
粗
|
1
|
5
|
细
|
0.5
|
4.5
|
细
|
0.75
|
5.2
|
8
|
粗
|
1.25
|
6.7
|
10
|
粗
|
1.5
|
8.5
|
细
|
1
0.75
|
7
7.2
|
细
|
1.25
1
0.75
|
8.7
9
9.2
|
12
|
粗
|
1.75
|
10.2
|
14
|
粗
|
2
|
11.9
|
细
|
1.5
1.25
1
|
10.5
10.7
11
|
细
|
1.5
1.25
1
|
12.5
12.7
13
|
16
|
粗
|
2
|
13.9*
|
18
|
粗
|
2.5
|
15.4
|
细
|
1.5
1
|
14.5
15
|
细
|
2
1.5
1
|
15.9
16.5
17
|
20
|
粗
|
2.5
|
17.4
|
22
|
粗
|
2.5
|
19.5*
|
细
|
2
1.5
1
|
17.9
18.5
19
|
细
|
2
1.5
1
|
19.9
20.5
21
|
24
|
粗
|
3
|
20.9
|
27
|
粗
|
3
|
23.9*
|
细
|
2
1.5
1
|
21.9
22.5
23
|
细
|
2
1.5
1
|
24.9
25.5
26
|
30
|
粗
|
3.5
|
26.3*
|
33
|
粗
|
3.5
|
29.3*
|
细
|
3
2
1.5
1
|
26.9
27.9
23.5
29
|
细
|
3
2
1.5
|
29.9
30.9
31.5
|
36
|
粗
|
4
|
31.8*
|
39
|
粗
|
4
|
34.8*
|
细
|
3
2
1.5
|
32.9
33.9
34.5
|
细
|
3
2
1.5
|
35.9
36.9
37.5
|
42
|
粗
|
4.5
|
37.3
|
45
|
粗
|
4.5
|
40.3*
|
细
|
4
3
2
1.5
|
37.8
38.9
39.9
40.5
|
细
|
4
3
2
1.5
|
40.8
41.9
42.9
43.5
|
48
|
粗
|
5
|
42.7
|
52
|
粗
|
5
|
46.7*
|
细
|
4
3
2
1.5
|
43.8
44.9
45.9
46.5
|
细
|
4
3
2
1.5
|
47.8
48.9
49.9
50.5
|
*为目前尚未列入麻花钻头标准系列的规格,建议根据加工条件,按下列表选择代用钻头。
|