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► 短柄螺母丝锥攻牙钻孔径
1. Drill Hole Size and Tolerance Selection (螺母攻牙钻孔径及精度选定)
依据螺螺母螺纹等级选定螺母丝锥之精度
表1. 公制螺纹(M)
规格
|
螺距
|
螺母丝锥精度
|
1级螺母螺纹
|
2级螺母螺纹
|
M3 M4 M4.5 M5 M5.5
|
0.5
|
GH3
|
GH4
|
GH5
|
GH6
|
M3 M3.5
|
0.35
|
GH3
|
GH4
|
GH5
|
GH6
|
M3.5
|
0.6
|
GH3
|
GH4
|
GH5
|
GH6
|
M4
|
0.7
|
GH4
|
GH5
|
GH6
|
GH7
|
M5
|
0.8
|
GH4
|
GH5
|
GH6
|
GH7
|
M6
|
1
|
GH4
|
GH5
|
GH6
|
GH7
|
M4 M4.5 M6
|
0.75
|
GH4
|
GH5
|
GH6
|
GH7
|
M7 M8 M9
|
1
|
GH4
|
GH5
|
GH6
|
GH7
|
M10 M11
|
0.75
|
GH4
|
GH5
|
GH6
|
GH7
|
M10 M11 M12
|
1
|
GH4
|
GH6
|
GH7
|
GH8
|
M8 M9 M10 M12
|
1.25
|
GH5
|
GH6
|
GH7
|
GH8
|
M10 M11 M12
|
1.5
|
GH5
|
GH6
|
GH7
|
GH8
|
M12
|
1.75
|
GH5
|
GH7
|
GH8
|
GH9
|
M14 M15 M16
|
1
|
GH5
|
GH6
|
GH7
|
GH8
|
M17 M18 M20 M22 M24
|
1
|
GH5
|
GH6
|
GH7
|
GH8
|
M14 M15 M16
|
1.5
|
GH5
|
GH7
|
GH8
|
GH9
|
M18 M20 M22 M24
|
1.5
|
GH6
|
GH7
|
GH8
|
GH9
|
M14 M16
|
2
|
GH6
|
GH7
|
GH8
|
GH9
|
M17
|
1.5
|
GH6
|
GH8
|
GH9
|
GH10
|
M18 M20 M22
|
2
|
GH6
|
GH8
|
GH9
|
GH10
|
M18 M20 M22
|
2.5
|
GH6
|
GH8
|
GH9
|
GH10
|
M24
|
2
|
GH6
|
GH8
|
GH9
|
GH10
|
M24
|
3
|
GH6
|
GH8
|
GH9
|
GH10
|
注:斜体部分是最常用螺母丝锥精度,一般情况下备有库存。 |
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表2. 美制螺纹(U)
规格
|
牙数
|
螺母丝锥精度
|
1级螺母螺纹
|
2级螺母螺纹
|
No.5
|
44
|
GH3
|
GH4
|
GH5
|
GH6
|
No.5 No.6
|
40
|
GH3
|
GH4
|
GH5
|
GH6
|
No.8
|
36
|
GH4
|
|
GH5
|
GH6
|
No.6 No.8 No.10
|
32
|
GH4
|
|
GH5
|
GH6
|
No.10 No.12
|
24
|
GH4
|
|
GH5
|
GH6
|
No.12
|
28
|
GH4
|
|
GH5
|
GH6
|
U 1/4
|
20
|
GH4
|
GH5
|
GH6
|
GH7
|
|
28
|
GH4
|
|
GH5
|
GH6
|
U 5/16
|
18
|
GH5
|
GH6
|
GH7
|
GH8
|
|
24
|
GH5
|
|
GH6
|
GH7
|
U 3/8
|
16
|
GH5
|
GH6
|
GH7
|
GH8
|
|
24
|
GH5
|
|
GH6
|
GH7
|
U 7/16
|
14
|
GH5
|
GH6
|
GH7
|
GH8
|
|
20
|
GH5
|
GH6
|
GH7
|
GH8
|
U 1/2
|
13
|
GH6
|
GH7
|
GH8
|
GH9
|
|
20
|
GH5
|
GH6
|
GH7
|
GH8
|
U 9/16
|
12
|
GH6
|
GH7
|
GH8
|
GH9
|
|
18
|
GH6
|
GH7
|
GH8
|
GH9
|
U 5/8
|
11
|
GH7
|
GH8
|
GH9
|
GH10
|
|
18
|
GH6
|
GH7
|
GH8
|
GH9
|
U 3/4
|
10
|
GH7
|
GH8
|
GH9
|
GH10
|
|
16
|
GH6
|
GH7
|
GH8
|
GH9
|
U 7/8
|
9
|
GH7
|
GH8
|
GH9
|
GH10
|
|
14
|
GH6
|
GH7
|
GH8
|
GH9
|
U 1"
|
8
|
GH8
|
GH9
|
GH10
|
GH11
|
|
12
|
GH7
|
GH8
|
GH9
|
GH10
|
注:斜体部分是最常用螺母丝锥精度,一般情况下备有库存。 |
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表3. 英制螺纹(W)
规格
|
牙数
|
螺母丝锥精度
|
1级螺母螺纹
|
2级螺母螺纹
|
W 1/8
|
44
|
GH3
|
GH4
|
GH5
|
GH6
|
W 5/32
|
40
|
GH3
|
GH4
|
GH5
|
GH6
|
W 3/24
|
36
|
GH4
|
|
GH5
|
GH6
|
W 1/4
|
20
|
GH4
|
GH5
|
GH6
|
GH7
|
W 5/16
|
18
|
GH5
|
GH6
|
GH7
|
GH8
|
W 3/8
|
16
|
GH5
|
GH6
|
GH7
|
GH8
|
W 7/16
|
14
|
GH5
|
GH6
|
GH7
|
GH8
|
W 1/2
|
12
|
GH6
|
GH7
|
GH8
|
GH9
|
W 9/16
|
12
|
GH6
|
GH7
|
GH8
|
GH9
|
W 5/8
|
11
|
GH7
|
GH8
|
GH9
|
GH10
|
W 3/4
|
10
|
GH7
|
GH8
|
GH9
|
GH10
|
W 7/8
|
9
|
GH7
|
GH8
|
GH9
|
GH10
|
W 1"
|
8
|
GH8
|
GH9
|
GH10
|
GH11
|
注:斜体部分是最常用螺母丝锥精度,一般情况下备有库存。 |