螺纹的收尾、肩距和退刀槽(GB/T3-1997)
内螺纹的收尾、肩距和退刀槽(GB/T3-1997)(mm)
螺距P | 收 尾x max | 肩 距Amax | 退 刀 槽 | |||||
G1 | Dg | R≈ | ||||||
一般 | 短的 | 一般 | 长的 | 一般 | 短的 | |||
0.25 | 1 | 0.5 | 1.5 | 2 | D+0.3 | |||
0.3 | 1.2 | 0.6 | 1.8 | 2.4 | ||||
0.35 | 1.4 | 0.7 | 2.2 | 2.8 | ||||
0.4 | 1.6 | 0.8 | 2.5 | 3.2 | ||||
0.45 | 1.8 | 0.9 | 2.8 | 3.6 | ||||
0.5 | 2 | 1 | 3 | 4 | 2 | 1 | 0.2 | |
0.6 | 2.4 | 1.2 | 3.2 | 4.8 | 2.4 | 1.2 | 0.3 | |
0.7 | 2.8 | 1.4 | 3.5 | 5.6 | 2.8 | 1.4 | 0.4 | |
0.75 | 3 | 1.5 | 3.8 | 6 | 3 | 1.5 | 0.4 | |
0.8 | 3.2 | 1.6 | 4 | 6.4 | 3.2 | 1.6 | 0.4 | |
1 | 4 | 2 | 5 | 8 | 4 | 2 | D+0.5 | 0.5 |
1.25 | 5 | 2.5 | 6 | 10 | 5 | 2.5 | 0.6 | |
1.5 | 6 | 3 | 7 | 12 | 6 | 3 | 0.8 | |
1.75 | 7 | 3.5 | 9 | 14 | 7 | 3.5 | 0.9 | |
2 | 8 | 4 | 10 | 16 | 8 | 4 | 1 | |
2.5 | 10 | 5 | 12 | 18 | 10 | 5 | 1.2 | |
3 | 12 | 6 | 14 | 22 | 12 | 6 | 1.5 | |
3.5 | 14 | 7 | 16 | 24 | 14 | 7 | 1.8 | |
4 | 16 | 8 | 18 | 26 | 16 | 8 | 2 | |
4.5 | 18 | 9 | 21 | 29 | 18 | 9 | 2.2 | |
5 | 20 | 10 | 23 | 32 | 20 | 10 | 2.5 | |
5.5 | 22 | 11 | 25 | 35 | 22 | 11 | 2.8 | |
6 | 24 | 12 | 28 | 38 | 24 | 12 | 3 | |
参考值 | =4P | =2P | ≈(6~5)P | ≈(8~6.5)P | 3 d=4P | =2P | — | ≈0.5P |
注: 1.应优先选用“一般”2度的收尾和肩距;容屑需要较大空间时可选用“长”肩距,结构限制时可选用“短”收尾。
2.“短”退刀槽仅在结构受限制时采用。
3.Dg公差为H13。
4.D为螺纹公称直径代号。
外螺纹的收尾、肩距和退刀槽(GB/T3-1997) (mm)
螺距P | 收 尾x max | 肩 距a max | 退刀槽 | ||||||
一般 | 短的 | 一般 | 长的 | 短的 | g1min | g2max | dg | r≈ | |
0.25 | 0.6 | 0.3 | 0.75 | 1 | 0.5 | 0.4 | 0.75 | d-0.4 | 0.12 |
0.3 | 0.75 | 0.4 | 0.9 | 1.2 | 0.6 | 0.5 | 0.9 | d—0.5 | 0.16 |
0.35 | 0.9 | 0.45 | 1.05 | 1.4 | 0.7 | 0.6 | 1.05 | d—0.6 | 0.16 |
0.4 | 1 | 0.5 | 1.2 | 1.6 | 0.8 | 0.6 | 1.2 | d—0.7 | 0.2 |
0.45 | 1.1 | 0.6 | 1.35 | 1.8 | 0.9 | 0.7 | 1.35 | d—0.7 | 0.2 |
0.5 | 1.25 | 0.7 | 1.5 | 2 | 1 | 0.8 | 1.5 | d—0.8 | 0.2 |
0.6 | 1.5 | 0.75 | 1.8 | 2.4 | 1.2 | 0.9 | 1.8 | d—1 | 0.4 |
0.7 | 1.75 | 0.9 | 2.1 | 2.8 | 1.4 | 1.1 | 2.1 | d—1.1 | 0.4 |
0.75 | 1.9 | 1 | 2.25 | 3 | 1.5 | 1.2 | 2.25 | d—1.2 | 0.4 |
0.8 | 2 | 1 | 2.4 | 3.2 | 1.6 | 1.3 | 2.4 | d—1.3 | 0.4 |
1 | 2.5 | 1.25 | 3 | 4 | 2 | 1.6 | 3 | d—1.6 | 0.6 |
1.25 | 3.2 | 1.6 | 4 | 5 | 2.5 | 2 | 3.75 | d—2 | 0.6 |
1.5 | 3.8 | 1.9 | 4.5 | 6 | 3 | 2.5 | 4.5 | d—2.3 | 0.8 |
1.75 | 4.3 | 2.2 | 5.3 | 7 | 3.5 | 3 | 5.25 | d—2.6 | 1 |
2 | 5 | 2.5 | 6 | 8 | 4 | 3.4 | 6 | d—3 | 1 |
2.5 | 6.3 | 3.2 | 7.5 | 10 | 5 | 4.4 | 7.5 | d—3.6 | 1.2 |
3 | 7.5 | 3.8 | 9 | 12 | 6 | 5.2 | 9 | d—4.4 | 1.6 |
3.5 | 9 | 4.5 | 10.5 | 14 | 7 | 6.2 | 10.5 | d—5 | 1.6 |
4 | 10 | 5 | 12 | 16 | 8 | 7 | 12 | d—5.7 | 2 |
4.5 | 11 | 5.5 | 13.5 | 18 | 9 | 8 | 13.5 | d—6.4 | 2.5 |
5 | 12.5 | 6.3 | 15 | 20 | 10 | 9 | 15 | d—7 | 2.5 |
5.5 | 14 | 7 | 16.5 | 22 | 11 | 11 | 17.5 | d—7.7 | 3.2 |
6 | 15 | 7.5 | 18 | 24 | 12 | 11 | 18 | d—8.3 | 3.2 |
参考值 | ≈2.5P | ≈1.25P | ≈3P | =4P | =2P | — | ≈3P | — | — |
注: 1.应优先选用“一般”长度的收尾和肩距;“短”收尾和“短”肩距仅用于结构受限制的螺纹件上;产品等级为B或C级的螺纹紧固件可采用“长”肩距。
2. d为螺纹公称直径代号。
3. dg公差为:h13(d>3mm);h12(d≤mm)。
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