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| 螺纹基本尺寸 |
| 2012/10/18 |
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螺纹基本尺寸
GB/T7306-1987 上海恒宝机电设备有限公司021-62144852 |
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7 |
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9 |
10 |
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尺寸代号 |
每25.4mm的牙数n |
螺距p |
牙高h |
圆弧半径r |
基本直径 |
基本距离 |
有效螺纹长度 |
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大径d=D |
中径d2=D2 |
小径d3=D3 |
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1/8 |
28 |
0.907 |
0.581 |
0.125 |
9.728 |
9.147 |
8.566 |
4 |
6.5 |
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1/4 |
19 |
1.337 |
0.856 |
0.184 |
13.157 |
12.301 |
11.445 |
6 |
9.7 |
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3/8 |
19 |
1.337 |
0.856 |
0.184 |
16.662 |
15.806 |
14.95 |
6.4 |
10.1 |
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1/2 |
14 |
1.814 |
1.162 |
0.249 |
20.955 |
19.793 |
18.631 |
8.2 |
13.2 |
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3/4 |
14 |
1.814 |
1.162 |
0.249 |
26.441 |
25.279 |
24.117 |
9.5 |
14.5 |
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1 |
11 |
2.309 |
1.479 |
0.317 |
33.249 |
31.77 |
30.291 |
10.4 |
16.8 |
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1-1/4 |
11 |
2.309 |
1.479 |
0.317 |
41.91 |
40.431 |
38.952 |
12.7 |
19.1 |
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1-1/2 |
11 |
2.309 |
1.479 |
0.317 |
47.803 |
46.324 |
44.845 |
12.7 |
19.1 |
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2 |
11 |
2.309 |
1.479 |
0.317 |
59.614 |
58.135 |
56.656 |
15.9 |
23.4 |
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2-1/2 |
11 |
2.309 |
1.479 |
0.317 |
75.184 |
73.705 |
72.226 |
17.5 |
26.7 |
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3 |
11 |
2.309 |
1.479 |
0.317 |
87.884 |
86.405 |
84.926 |
20.6 |
29.8 | |
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