攻牙底孔参数
攻牙底孔的使用参数表
一、螺紋下孔徑表
1、公制粗牙螺紋JIS B 0209-1982(單位：mm)
螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑
最小直径最大直径
M 1 ×0.25 0.75 0.78 (80%) 0.729 0.785
1.1 ×0.25 0.85 0.88 (80%) 0.829 0.885
1.2 ×0.25 0.95 0.98 (80%) 0.929 0.985
1.4 ×0.3 1.1 1.14 (80%) 1.075 1.142
1.6 ×0.35 1.25 1.32 (75%) 1.221 1.321
1.8 ×0.35 1.45 1.52 (75%) 1.421 1.521
2 ×0.4 1.6 1.65 (80%) 1.567 1.679
2.2 ×0.45 1.75 1.83 (75%) 1.713 1.838
2.5 ×0.45 2.1 2.13 (75%) 2.013 2.138
3 ×0.5 2.5 2.59 (75%) 2.459 2.599
3.5 ×0.6 2.9 3.01 (75%) 2.850 3.010
4 ×0.7 3.3 3.39 (80%) 3.242 3.422
4.5 ×0.75 3.8 3.85 (80%) 3.688 3.878
5 ×0.8 4.2 4.31 (80%) 4.134 4.334
6 × 1 5 5.13 (80%) 4.91
7 5.153
7 × 1 6 6.13 (80%) 5.917 6.153
8 × 1.25 6.8 6.85 (85%) 6.647 6.912
9 × 1.25 7.8 7.85 (85%) 7.647 7.912
10 × 1.5 8.5 8.62 (85%) 8.376 8.676
11 × 1.5 9.5 9.62 (85%) 9.376 9.676
12 × 1.75 10.3 10.40 (85%) 10.106 10.441
14 × 2 12 12.2 (85%) 11.835 12.210
16 × 2 14 14.2 (85%) 13.835 14.210
18 × 2.5 15.5 15.7 (85%) 15.294 15.744
20 × 2.5 17.5 17.7 (85%) 17.294 17.744
22 × 2.5 19.5 19.2 (85%) 19.294 19.744
24 × 3 21 21.2 (85%) 20.752 21.252
27 × 3 24 24.2 (85%) 23.752 24.252
30 × 3.5 26.5 26.6 (90%) 26.211 26.771
33 × 3.5 29.5 29.6 (90%) 29.211 29.771
36 × 4 32 32.1 (90%) 31.670 32.270
39 × 4 35 35.1 (90%) 34.670 35.270
42 × 4.5 37.5 37.6 (90%) 37.129 37.799
45 × 4.5 40.5 40.6 (90%) 40.129 40.799
48 × 5 43 43.1 (90%) 42.587 43.297 註(1)M1.4以下等級：5H、M1.6以上等級：6H (2)基於JIS B 0209-1982標準
2、公制細牙螺紋-01 JIS B 0211-1982(單位：mm)
螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑
最小直径最大直径
M 2.5 ×0.35 2.2 2.22 (75%) 2.121 2.221
3 ×0.35 2.7 2.72 (75%) 2.621 2.721
3.5 ×0.35 3.2 3.22 (75%) 3.121 3.221
4 ×0.
5 3.5 3.59 (75%) 3.459 3.599
4.5 ×0.5 4 4.09 (75%) 3.959 4.099
5 ×0.5 4.5 4.59 (75%) 4.459 4.599
5.5 ×0.5 5 5.09 (75%) 4.959 5.099
6 ×0.75 5.3 5.35 (80%) 5.188 5.378
7 ×0.75 6.3 6.35 (80%) 6.188 6.378
8 × 1 7 7.13 (80%) 6.917 7.153
8 ×0.75 7.3 7.35 (80%) 7.188 7.378
9 × 1 8 8.13 (80%) 7.917 8.153
9 ×0.75 8.3 8.35 (80%) 8.188 8.378
10 × 1.25 8.8 8.85 (85%) 8.647 8.912
10 × 1 9 9.13 (80%) 8.917 9.153
10 ×0.75 9.3 9.35 (80%) 9.188 9.378
11 × 1 10 10.13 (80%) 9.917 10.153
11 ×0.75 10.3 10.35 (80%) 10.188 10.378
12 × 1.5 10.5 10.62 (85%) 10.376 10.676
12 × 1.25 10.8 10.85 (85%) 10.647 10.912
12 × 1 11 11.13 (80%) 10.917 11.153
14 × 1.5 12.5 12.62 (85%) 12.376 12.676
14 × 1 13 13.13 (80%) 12.917 13.153
15 × 1.5 13.5 13.62 (85%) 13.376 13.676
15 × 1 14 14.13 (80%) 13.917 14.153
16 × 1.5 14.5 14.62 (85%) 14.376 14.676
16 × 1 15 15.13 (80%) 14.917 15.153
17 × 1.5 15.5 15.62 (85%) 15.376 15.676
17 × 1 16 16.13 (80%) 15.917 16.153
18 × 2 16 16.2 (85%) 15.835 16.210
18 × 1.5 16.5 16.62 (85%) 16.376 16.676
18 × 1 17 17.13 (80%) 16.917 17.153
20 × 2 18 18.2 (85%) 17.835 18.210
20 × 1.5 18.5 18.62 (85%) 18.376 18.676
20 × 1 19 19.13 (80%) 18.917 19.153
22 × 2 20 20.2 (85%) 19.835 20.210
22 × 1.5 20.5 20.62 (85%) 20.376 20.676
22 × 1 21 21.13 (80%) 20.917 21.153
24 × 2 22 22.2 (85%) 21.835 22.210
24 × 1.5 22.5 22.62 (85%) 22.376 22.676
24 × 1 23 23.13 (80%) 22.917 23.153
25 × 2 23 23.2 (85%) 22.835 23.210
25 × 1.5 23.5 23.62 (85%) 23.376 23.676
25 × 1 24 24.13 (80%) 23.917 24.153
公制細牙螺紋-02 JIS B 0211-1982(單位：mm)
螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑
最小直径最大直径M 26 × 1.5 24.5 24.62 (85%) 24.376 24.676 27 × 2 25 25.2 (85%) 24.835 25.210 27 × 1.5 25.5 25.62 (85%) 25.376 25.676
27 × 1 26 26.13 (80%) 25.917 26.153
28 × 2 26 26.2 (85%) 25.835 26.210 28 × 1.5 26.5 26.62 (85%) 26.376 26.676 28 × 1 27 27.13 (80%) 26.917 27.153
30 × 3 27 27.2 (85%) 26.752 27.252 30 × 2 28 28.2 (85%) 27.835 28.210 30 × 1.5 28.5 28.62 (85%) 28.376 28.676 30 × 1 29 29.13 (80%) 28.917 29.153 32 × 2 30 30.2 (85%) 29.835 30.210
32 × 1.5 30.5 30.62 (85%) 30.376 30.676
33 × 3 30 30.2 (85%) 29.752 30.252 33 × 2 31 31.2 (85%) 30.835 31.210 33 × 1.5 31.5 31.62 (85%) 31.376 31.676
35 × 1.5 33.5 33.62 (85%) 33.376 33.676
36 × 3 33 33.2 (85%) 32.752 33.252 36 × 2 34 34.2 (85%) 33.835 34.210 36 × 1.5 34.5 34.62 (85%) 34.376 34.676
38 × 1.5 36.5 36.62 (85%) 36.376 36.676
39 × 3 36 36.2 (85%) 35.752 36.252 39 × 2 37 37.2 (85%) 36.835 37.210
39 × 1.5 37.5 37.62 (85%) 37.376 37.676
40 × 3 37 37.2 (85%) 36.752 37.252 40 × 2 38 38.2 (85%) 37.835 38.210 40 × 1.5 38.5 38.62 (85%) 38.376 38.676 42 × 4 38 38.1 (90%) 37.670 38.270 42 × 3 39 39.2 (85%) 38.752 39.252 42 × 2 40 40.2 (85%) 39.835 40.210 42 × 1.5 40.5 40.62 (85%) 40.376 40.676 45 × 4 41 41.1 (90%) 40.670 41.270 45 × 3 42 42.2 (85%) 41.752 42.252 45 × 2 43 43.2 (85%) 42.835 43.210 45 × 1.5 43.5 43.62 (85%) 43.376 43.676 48 × 4 44 44.1 (90%) 43.670 44.270 48 × 3 45 45.2 (85%) 44.752 45.252 48 × 2 46 46.2 (85%) 45.835 46.210
48 × 1.5 46.5 46.62 (85%) 46.376 46.676 50 × 3 47 47.2 (85%) 46.752 47.252 50 × 2 48 48.2 (85%) 47.835 48.210 50 × 1.5 48.5 48.62 (85%) 48.376 48.676 註(1)等級：6H
(2)基於JIS B 0211-1982標準
3、美制粗牙螺紋(單位：mm)
螺纹尺寸钻头直径2B级螺纹下孔徑內螺紋小徑
最小直径最大直径NO.1 -64UNC 1.55 1.57 (65%) 1.425 1.582
2 -56 1.8 1.86 (65%) 1.695 1.871
3 -48 2.1 2.1
4 (65%) 1.941 2.146
4 -40 2.3 2.36 (70%) 2.157 2.385
5 -40 2.
6 2.69 (70%) 2.48
7 2.697
6 -32 2.8 2.86 (75%) 2.642 2.895
8 -32 3.4 3.52 (75%) 3.302 3.530 10 -24 3.9 3.91 (80%) 3.683 3.962 12 -24 4.5 4.57 (80%) 4.344 4.597
1/4 -20 5.1 5.25 (80%) 4.979 5.257
5/16 -18 6.6 6.72 (80%) 6.401 6.731
3/8 -16 8 8.15 (80%) 7.798 8.153 7/16 -14 9.4 9.50 (80%) 9.144 9.550 1/2 -13 10.8 11.0 (80%) 10.592 11.023 9/16 -12 12.2 12.3 (85%) 11.989 12.446 5/8 -11 13.6 13.8 (85%) 13.386 13.868 3/4 -10 16.5 16.8 (80%) 16.307 16.840 7/8 - 9 19.5 19.6 (85%) 19.177 19.761 1 - 8 22.2 22.5 (85%) 21.971 22.606
1 1/8 - 7 25 25.
2 (85%) 24.638 25.349
1 1/4 - 7 28.
2 28.4 (85%) 27.81
3 28.524
1 3/8 - 6 30.8 31.0 (85%) 30.353 31.115
1 1/
2 - 6 34 34.2 (85%) 33.528 34.290
1 3/4 - 5 39.5 39.8 (85%) 38.964 39.827
2 - 4 45.2 45.
3 (90%) 44.679 45.593 4、美制細牙螺紋(單位：mm)
螺纹尺寸钻头直
径2B级螺纹下孔徑內螺紋小徑
最小直径最大直径
NO. 0 -80UNF 1.25 1.30 (65%) 1.182 1.305
1 -7
2 1.55 1.61 (65%) 1.474 1.612
2 -64 1.85 1.90 (65%) 1.756 1.912
3 -56 2.1 2.17 (70%) 2.025 2.197
4 -48 2.4 2.44 (70%) 2.271 2.458
5 -44 2.7 2.74 (70%) 2.551 2.740
6 -40 2.9 3.02 (70%) 2.820 3.022
8 -36 3.5 3.59 (75%) 3.404 3.606
10 -32 4.1 4.14 (80%) 3.963 4.165
12 -28 4.6 4.70 (80%) 4.496 4.724
1/4 -28 5.5 5.56 (80%) 5.360 5.588
5/16 -24 6.9 7.02 (80%) 6.782 7.035
3/8 -24 8.5 8.61 (80%) 8.382 8.636
7/16 -20 9.9 10.01 (80%) 9.729 10.033 1/2 -20 11.5 11.60 (80%) 11.329 11.607 9/16 -18 12.9 13.07 (80%) 12.751 13.081 5/8 -18 14.5 14.65 (80%) 14.351 14.681 3/4 -16 17.5 17.59 (85%) 17.323 17.678 7/8 -14 20.5 20.6 (85%) 20.270 20.675 1 -12 23.2 23.5 (85%) 23.114 23.571 1 1/8 -12 26.5 26.7 (80%) 26.289 26.746 1 1/4 -12 29.5 29.9 (80%) 29.464 29.921 1 3/8 -12 32.8 33.0 (85%) 32.639 33.096 1 1/2 -12 36 36.2 (85%) 35.814 36.271 5、英制粗牙螺紋(單位：mm) 螺紋尺寸下孔徑嵌合率
A列(硬材質) B列(軟材
質)
A列直徑B列直徑內螺紋最小
徑
內螺紋最大
徑
W 1/8 2.6 2.5 70.7 83.0 70.0 88.3 3/16 3.7 3.6 78.4 85.8 70.0 88.3 1/4 5.1 5.0 76.9 83.0 70.5 88.3 5/16 6.6 6.5 74.0 99.5 70.1 88.4 3/8 8.0 7.9 75.0 80.0 69.5 88.2 7/16 9.4 9.3 73.7 80.0 69.0 88.8 1/2 10.7 10.5 73.8 81.2 69.0 88.2 9/16 12.3 12.0 73.4 84.4 69.0 88.2 5/8 13.7 13.5 73.5 80.3 69.6 88.5 3/4 16.7 16.5 72.3 78.4 69.6 88.3 7/8 19.5 19.3 75.4 80.9 70.1 88.4 1 22.4 22.0 73.8 83.6 71.0 88.2 1 1/8 25.0 24.8 76.9 81.3 72.0 88.4 1 1/4 28.3 28.0 74.3 80.7 72.0 88.4 1 3/8 30.5 30.3 81.6 85.3 73.8 88.6 1 1/2 33.8 33.5 79.3 84.8 73.8 88.6 1 5/8 36.0 35.7 81.1 85.7 74.8 88.3 1 3/4 39.2 39.0 80.7 83.8 74.8 88.3
1 7/8 41.8 41.5 80.6 84.7 74.7 88.4
2 45.0 44.7 80.2 84.4 74.7 88.4 6、英制管用螺紋(單位：mm)
管用螺紋尺寸JIS B 0203 JIS B 2301
錐管內螺紋Rc(PT) 平行內螺紋Rp(PS) 錐管內螺紋
計算值下孔徑計算值下孔徑計算值下孔
徑
1/16 6.230 6.2 6.490 6.5 －－1/8 8.235 8.2 8.495 8.5 8.191 8.2 1/4 10.941 10.9 11.341 11.4 10.945 10.9 3/8 14.428 14.4 14.846 14.9 14.388 14.4 1/2 17.950 18 18.489 18.5 17.943 18 3/4 23.349 23 23.975 24 23.305 23 1 29.423 29 30.111 30 29.353 29 1 1/4 37.940 38 38.772 39 37.890 38
1 1/
2 43.83
3 4
4 44.56
5 45 43.720 43
2 55.412 55 56.476 56 55.406 55
2 1/2 70.701 71 72.009 72 70.788 70
3 83.201 83 84.709 85 83.36
4 83
3 1/2 95.547 96 97.155 97 95.747 95
4 107.834 108 109.85
5 110 108.322 108
5 133.110 133 135.255 135 133.597 133
6 158.510 159 160.655 161 158.810 158
7 183.360 183 185.954 186
8 208.560 209 211.354 212
9 233.960 234 236.754 237
10 259.166 259 262.154 262
12 309.747 310 312.875 313
7、美制管用耐密斜行螺紋(NPTF?NPSF) (單位：mm)
管用螺紋尺寸斜行螺紋(NPTF) 平行螺紋(NPSF)
鑽頭直徑鑽頭直徑
使用鉸刀場合不使用鉸刀
合
1/16 －0.234 ( 5.94) 0.246 ( 6.25) 1/4 0.250 ( 6.35) 1/8 21/64 0.328 ( 8.33) 0.339 ( 8.61) 11/32 0.344 ( 8.74)
1/4 27/64 0.422 (10.72) 7/16 0.438 (11.13) －0.444 (11.28) 3/8 9/16 0.562 (14.27) 37/64 0.578 (14.68) 37/64 0.578 (14.68) 1/2 11/16 0.688 (17.48) 45/64 0.703 (17.86) 23/32 0.719 (18.26) 3/4 57/64 0.891 (22.63) 59/64 0.922 (23.42) －0.922 (23.42) 1 1 1/8 1.125 (28.58) 1 5/32 1.156 (29.36) 1 5/32 1.156 (29.36) 1 1/4 1 15/32 1.469 (37.31) 1
1/2
1.500 (38.10) －－
1 1/
2 1 45/64 1.70
3 (43.26) 1
47/64
1.734 (44.04) －－
2 2 3/16 2.188 (55.58) 2 7/32 2.219 (56.36) －－
2 1/2 2 19/32 2.594 (65.89) 2
41/64
2.641 (67.08) －－
上述鑽頭直徑來源於美制管用耐密斜行螺紋ANSI B1.20.3—1957 Dryseal Pipe Threads (Inch)標準
8、公制螺紋(NRT) (單位：mm)
螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑
RH 精度最小～最大
(嵌合率％)
RH
精度
最小～最大
(嵌合率％)
M 1 ×0.25 2 0.87 ~ 0.89 (100~85) 4 0.90 ~0.92 (100~80) 1.1×0.25 2 0.97 ~ 0.99 (100~85) 4 1.00 ~1.02 (100~80) 1.2×0.25 2 1.07 ~ 1.09 (100~85) 4 1.10 ~1.12 (100~80) 1.4×0.3 2 1.244~ 1.263 (100~85) 4 1.270~ 1.294 (100~80)
1.7×0.35 2 1.51 ~ 1.54 (100~80) 4 1.54 ~ 1.58 (100~75)
2 ×0.4 2 1.78 ~ 1.82 (100~80) 4 1.81 ~ 1.85 (100~75) 2.3×0.4 2 2.08 ~ 2.12 (100~80) 4 2.11 ~ 2.15 (100~75) 2.5×0.45 2 2.25 ~ 2.29 (100~80) 4 2.28 ~ 2.3
3 (100~75)
2.6×0.45 2 2.35 ~ 2.39 (100~80) 4 2.38 ~ 2.43 (100~75)
3 ×0.5 3 2.7
4 ~ 2.78 (100~80)
5 2.7
6 ~ 2.81 (100~75)
3.5×0.6 3 3.18 ~ 3.21 (100~85) 5 3.20 ~ 3.26 (100~75)
4 ×0.7 4 3.63 ~ 3.67 (100~85) 6 3.6
5 ~ 3.70 (100~85)
5 ×0.8 4 4.57 ~ 4.62 (100~85)
6 4.59 ~ 4.66 (100~80)
6 ×1 4 5.45 ~ 5.51 (100~85)
7 5.4
8 ~ 5.57 (100~80)
7 ×1 4 6.45 ~ 6.51 (100~85) 7 6.48 ~ 6.57 (100~80)
8 ×1.25 5 7.31 ~ 7.38 (100~85) 7 7.34 ~ 7.41 (100~85) 8 ×1 4 7.45 ~ 7.51 (100~85) 7 7.48 ~ 7.57 (100~80) 10 ×1.5 5 9.16 ~ 9.22 (100~90) 7 9.18 ~ 9.28 (100~85) 10 ×1.25 5 9.31 ~ 9.38 (100~85) 7 9.34 ~ 9.41 (100~85) 10 ×1 5 9.46 ~ 9.52 (100~85) 7 9.48 ~ 9.57 (100~80) 12 ×1.75 5 11.01 ~11.08 (100~90) 8 11.05 ~11.15 (100~85) 12 ×1.5 5 11.16 ~11.22 (100~90) 7 11.18 ~11.28 (100~85) 12 ×1.25 5 11.31 ~11.38 (100~85) 7 11.34 ~11.41 (100~85) 12 ×1 5 11.46 ~11.52 (100~85) 7 11.48 ~11.57 (100~80) 14 ×2 6 12.83 ~12.95 (100~90) 10 12.92 ~13.04 (100~85) 14 ×1.5 5 13.16 ~13.22 (100~90) 9 13.21 ~13.30 (100~85) 16 ×2 6 14.87 ~14.95 (100~90) 10 14.92 ~15.04 (100~85) 16 ×1.5 5 15.16 ~15.22 (100~90) 9 15.21 ~15.30 (100~80) 18 ×2.5 6 16.57 ~16.67 (100~90) 11 16.63 ~16.78 (100~85) 18 ×1.5 6 17.17 ~17.23 (100~90) 10 17.22 ~17.31 (100~85) 20 ×2.5 6 18.57 ~18.67 (100~90) 11 18.63 ~18.78 (100~85) 20 ×1.5 6 19.17 ~19.23 (100~90) 10 19.22 ~19.31 (100~85) 9、美制粗牙螺紋(NRT) (單位：mm)
螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑
RH 最小～最大RH 最小～最大
精度(嵌合率％) 精度(嵌合率％)
NO. 2-56UNC 4 1.96 ~ 2.02 (100~65) 3 1.95 ~ 2.01 (100~65) 3-48 4 2.25 ~ 2.32 (100~65) 3 2.23 ~ 2.31 (100~65) 4-40 5 2.52 ~ 2.60 (100~70) 3 2.50 ~ 2.58 (100~70) 5-40 5 2.86 ~ 2.93 (100~70) 3 2.83 ~ 2.91 (100~70) 6-32 5 3.09 ~ 3.17 (100~75) 3 3.06 ~ 3.14 (100~75) 8-32 6 3.75 ~ 3.83 (100~75) 4 3.74 ~ 3.82 (100~75) 10-24 6 4.26 ~ 4.35 (100~80) 4 4.24 ~ 4.32 (100~80) 12-24 6 4.92 ~ 5.01 (100~80) 4 4.90 ~ 4.96 (100~85) 1/4 -20 6 5.66 ~ 5.76 (100~80) 4 5.64 ~ 5.74 (100~80) 5/16 -18 7 7.18 ~ 7.29 (100~80) 5 7.15 ~ 7.24 (100~85) 3/8 -16 7 8.66 ~ 8.78 (100~80) 5 8.63 ~ 8.73 (100~85) 7/16 -14 7 10.11 ~10.25 (100~80) 5 10.08 ~10.19 (100~85) 1/2 -13 8 10.62 ~11.78 (100~80) 6 11.60 ~11.68 (100~90) 9/16 -12 10 13.14 ~13.27 (100~85) 8 13.11 ~13.24 (100~85) 5/8 -11 11 14.62 ~14.76 (100~85) 8 14.58 ~14.67 (100~90) 3/4 -10 12 17.67 ~17.88 (100~80) 9 17.63 ~17.74 (100~90) 7/8 - 9 12 20.68 ~20.85 (100~85) 9 20.64 ~20.75 (100~90)
1 - 8 13 23.65 ~23.84 (100~85) 10 23.61 ~23.74 (100~90)
二、螺紋下孔徑表(無屑絲攻用)
1、美制細牙螺紋(NRT) (單位：mm)
螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑
RH 精度最小～最大
(嵌合率％)
RH
精度
最小～最大
(嵌合率％)
NO. 2-64UNF 3 1.98 ~ 2.04 (100~65) 2 1.97 ~ 2.03 (100~65) 3-56 4 2.29 ~ 2.35 (100~65) 3 2.28 ~ 2.34 (100~65) 4-48 4 2.57 ~ 2.64 (100~70) 3 2.56 ~ 2.63 (100~70) 5-44 4 2.88 ~ 2.95 (100~70) 3 2.87 ~ 2.94 (100~70) 6-40 5 3.19 ~ 3.26 (100~70) 3 3.16 ~ 3.22 (100~75) 8-36 5 3.80 ~ 3.88 (100~75) 4 3.79 ~ 3.86 (100~75) 10-32 5 4.41 ~ 4.48 (100~80) 4 4.40 ~ 4.46 (100~80) 12-28 5 5.00 ~ 5.08 (100~80) 4 4.99 ~ 5.06 (100~80) 1/4 -28 5 5.86 ~ 5.93 (100~80) 4 5.85 ~ 5.92 (100~80) 5/16-24 6 7.38 ~ 7.46 (100~80) 5 7.36 ~ 7.43 (100~85) 3/8 -24 6 8.96 ~ 9.05 (100~80) 5 8.95 ~ 9.02 (100~85) 7/16-20 7 10.44 ~10.54 (100~80) 5 10.41 ~10.49 (100~85) 1/2 -20 7 12.02 ~12.12 (100~80) 5 12.00 ~12.05 (100~90) 9/16-18 9 13.55 ~13.66 (100~80) 7 13.53 ~13.58 (100~90) 5/8 -18 9 15.14 ~15.25 (100~80) 7 15.11 ~15.17 (100~90) 3/4 -16 10 18.22 ~18.32 (100~85) 7 18.18 ~18.25 (100~90) 7/8 -14 11 21.27 ~21.38 (100~85) 8 21.23 ~21.27 (100~95)
1 - 1
2 12 24.28 ~24.41 (100~85) 9 24.24 ~24.32 (100~90)
2、英制管用平行螺紋(NRT) (單位：mm)
螺紋尺寸RH精度最小～最大(嵌合率％)
PF 1/8 6 9.24~ 9.35 (100~80)
1/4 7 12.41~12.62 (100~75)
3/8 7 15.92~16.12 (100~75)
1/2 8 19.93~20.15 (100~80)
3/4 8 25.41~25.64 (100~80)
3、公制螺紋(HRT) (單位：mm)
螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑
RH 精度最小～最大
(嵌合率％)
RH
精度
最小～最大
(嵌合率％)
M 1 ×0.25 2 0.858~0.879 (100~85) 4 0.858~0.887 (100~80) 1.2×0.25 2 1.058~1.079 (100~85) 4 1.058~1.087 (100~80) 1.4×0.3 2 1.23 ~1.26 (100~85) 4 1.23 ~1.26 (100~80) 1.6×0.35 2 1.40 ~1.44 (100~80) 4 1.40 ~1.45 (100~75) 1.7×0.35 － 1.50 ~1.54 (100~80) 4 1.50 ~1.55 (100~75)
1.8×0.35 2 1.60 ~1.64 (100~80) 4 1.60 ~1.65 (100~75)
2 ×0.4 2 1.77 ~1.82 (100~80) 4 1.77 ~1.82 (100~80) 2 ×0.25 2 1.858~1.887 (100~80) － 1.858~1.887 (100~80) 2.3×0.4 － 2.07 ~2.12 (100~80) 4 2.07 ~2.1
3 (100~75) 2.5×0.45 3 2.2
4 ~2.30 (100~80)
5 2.24 ~2.31 (100~75)
2.6×0.45 － 2.34 ~2.40 (100~80) 5 2.34 ~2.41 (100~75)
3 ×0.6 3 2.72 ~2.73 (100~90) 5 2.66 ~2.73 (100~90) 3 ×0.5 5 2.72 ~2.77 (100~80) 6 2.72 ~2.78 (100~75) 3 ×0.35 3 2.80 ~2.8
4 (100~80)
5 2.80 ~2.85 (100~75)
3.5×0.6 3 3.16 ~3.21 (100~85) 5 3.16 ~3.25 (100~75)
4 ×0.7
5 3 3.57 ~3.64 (100~85)
6 3.5
7 ~3.64 (100~85) 4 ×0.7 6 3.60 ~3.66 (100~85) 7 3.60 ~3.66 (100~85)
4 ×0.
5 3 3.71 ~3.77 (100~80)
6 3.71 ~3.79 (100~75)
5 ×0.9 3 4.49 ~4.59 (100~85) 7 4.49 ~4.59 (100~85) 5 ×0.8 3 4.55 ~4.62 (100~85) 8 4.55 ~4.64 (100~80)
5 ×0.5 3 2.72 ~4.77 (100~80)
6 4.72 ~4.79 (100~75)
6 ×1 4 5.43 ~5.52 (100~85)
7 5.43 ~5.55 (100~80) 6 ×0.75 3 5.57 ~5.64 (100~85) 7 5.57 ~5.66 (100~80)
4、公制粗牙螺紋HL-NRT (單位：mm)
螺紋尺寸RH精度最小～最大(嵌合率％) M 3 ×0.5 3 3.39~3.43 (100~80)
4 ×0.7 4 4.54~4.58 (100~85)
5 ×0.8 4 5.61~5.6
6 (100~85)
6 ×1 4 6.75~6.81 (100~85)
8 ×1.25 5 8.93~9.01 (100~85)
10 ×1.5 5 11.11~11.17 (100~90)
10 ×1.25 5 10.93~11.01 (100~85)
12 ×1.75 5 13.28~13.17 (100~90)
12 ×1.5 5 13.11~13.17 (100~90)
12 ×1.25 5 12.93~13.01 (100~85)
三、螺紋下孔徑表(護套螺紋用)
1、公制粗牙螺紋(單位：mm)
螺紋尺寸下孔徑鑽頭直徑
最小直徑最大直徑
M 2.5 ×0.45 2.60 2.65 2.6
2.6 ×0.45 2.70 2.75 2.7
3 ×0.5 3.12 3.20 3.1
4 ×0.7 4.17 4.30 4.2
5 ×0.8 5.1
6 5.33 5.2
6 × 1 6.25 6.42 6.3
8 × 1.25 8.31 8.52 8.4
14 × 2 14.49 14.83 14.5
16 × 2 16.49 16.83 16.5
18 × 2.5 18.58 19.04 19.0
20 × 2.5 20.58 21.04 21.0
22 × 2.5 22.58 23.04 23.0
24 × 2.5 24.70 25.25 25.0
2、公制細牙螺紋(單位：mm) 螺紋尺寸下孔徑鑽頭直徑
最小直徑最大直徑
M 10 × 1 10.25 10.42 10.3
10 × 1.25 10.31 10.52 10.4
12 × 1.25 12.31 12.52 12.5
12 × 1.5 12.37 12.62 12.5
14 × 1.5 14.37 14.62 14.5
16 × 1.5 16.37 16.62 16.5
18 × 1.5 18.37 18.62 18.5
20 × 1.5 20.37 20.62 20.5
20 × 2 20.47 20.83 20.5
22 × 1.5 22.37 22.62 22.5
24 × 1.5 24.37 24.62 24.5
24 × 2 24.47 24.83 24.5
30 × 1.5 30.37 30.62 30.5
3、美制粗牙螺紋(單位：mm)
螺紋尺寸下孔徑鑽頭直徑
最小直徑最大直徑
NO. 2 –56UNC 2.29 2.39 2.3
3 –48 2.6
4 2.74 2.7
4 –40 2.9
5 3.07 3.0
5 –40 3.25 3.38 3.3
6 –32 3.66 3.81 3.7
8 –32 4.32 4.47 4.4
10 –24 5.05 5.21 5.1
12 –24 5.61 5.77 5.7
1/4 –20 6.63 6.78 6.7
5/16 –8 8.33 8.48 8.4
3/8 –16 9.91 10.11 10.0
7/16 –14 11.51 11.76 11.5
1/2 –13 13.08 13.34 13.1
9/16 –12 14.68 14.94 14.7
4、美制細牙螺紋(單位：mm)
螺紋尺寸下孔徑鑽頭直徑
最小直徑最大直徑
NO. 4 –48UNF 2.97 3.05 3.0
10 –32 4.98 5.13 5.0
1/4 –28 6.53 6.71 6.6
5/16 –24 8.20 8.38 8.2
3/8 –24 9.78 9.96 9.8
7/16 –20 11.43 11.63 11.5
1/2 –20 13.03 13.26 13.1
9/16 –18 14.66 14.88 14.7
5/8 –18 16.26 16.48 16.3
3/4 –16 19.43 19.68 19.5
7/8 –14 22.61 22.86 22.7
1 –1
2 25.76 26.04 26.0
各種換算表
管用螺絲基準寸法(mm)
規格英制JIS(PT) 美式ASA(NPT)
山數外徑有效徑山數外徑有效徑1/16 7.723 27 7.77 7.142 1/8 28 9.728 9.147 27 10.116 9.489 1/4 19 13.157 12.301 18 13.427 12.487 3/8 19 16.662 15.806 18 16.866 15.926 1/2 14 20.955 19.793 14 20.980 19.772 3/4 14 26.441 25.279 14 26.326 25.117
1 11 33.249 31.770 111/
2 33.932 31.461
11/4 11 41.910 40.431 111/2 41.689 40.218 11/2 11 47.803 46.324 111/2 47.689 46.287
2 11 59.614 58.135 111/2 59.796 58.325
21/2 11 75.184 73.705 8 72.273 70.159
3 11 87.88
4 86.40
5 8 88.182 86.068
31/2 11 100.330 98.851 8 100.691 98.776
4 11 113.030 111.551 8 113.548 111.433
41/2 11 125.730 124.251
5 11 138.430 136.951 8 141.3 138.412
51/2 11 151.130 149.651
6 11 163.830 162.351 8 168.3 165.252
7 11 189.230 187.751
8 11 214.630 213.151 8 219.1 215.901
美制螺絲外徑公厘(mm)換算表
規格吋mm
NO. 0 0.0600 1.524
1 0.0730 1.854
2 0.0860 2.184
3 0.0990 2.515
4 0.1120 2.845
5 0.1250 3.175
6 0.1380 3.505
8 0.1640 4.166
10 0.1900 4.826
12 0.2160 5.486
山數節距換算表
山數(每25.4mm) 節距mm 100 0.2540
80 0.3175
72 0.3528
64 0.3969
60 0.4233
56 0.4536
48 0.5292
44 0.5773
40 0.6350
36 0.7056
32 0.7938
28 0.9071
24 1.0583
20 1.2700
18 1.4111
16 1.5875
14 1.8143
13 1.9538
12 2.1167
11 2.3091
10 2.5400
9 2.8222
8 3.1750
7 3.6286
6 4.2333
5 5.0800
4 1/2 5.6444
4 6.3500
3 1/2 7.2571
3 1/
4 7.8154
3 8.4667
2 7/8 8.8348
2 3/4 9.2364
2 5/8 9.6762
2 1/2 10.1600
攻丝底孔对照表
M Metrisches ISO Regelgewinde / Metric ISO thread / Filetage métrique ISO standard / Filettatura metrica ISO / Rosca Métrica ISO Kurzzeichen Thread size Désignation Diametro del ?letto Dimensión rosca (DIN 13) Bohrer-; Nominal size diamètre du foret Diametro nominale ;-Taladro (mm) (acc. to DIN 336) Innengewindekern-; Minor diameter / Diamètre du noyau ?leté / Diametro del nocciolo ;-nucleo de rosca interior (mm) min 6H m a x M 10,750,7290,785* M 1,20,950,9290,985* M 1,41,11,0751,142* M 1,61,251,2211,321 M 1,71,351,3211,421 M 1,81,451,4211,521 M 21,61,5671,679 M 2,21,751,7131,838 M 2,31,851,8131,938 M 2,52,052,0132,138 M 2,62,152,1132,238 M 32,52,4592,599 M 3,52,92,8503,010 M 43,33,2423,422 M 4,53,73,6883,878 M 54,24,1344,334 M 654,9175,153 M 765,9176,153 M 86,86,6476,912 M 97,87,6477,912 M 108,58,3768,676 M 119,59,3769,676 M 1210,210,10610,441 M 141211,83512,210 M 161413,83514,210 M 1815,515,29415,744 M 2017,517,29417,744 M 2219,519,29419,744 M 242120,75221,252 M 272423,75224,252 M 3026,526,21126,771 M 3329,529,21129,771 M 363231,67032,270 M 393534,67035,270 M 4237,537,12937,799 M 4540,540,12940,799 M 484342,58743,297 M 524746,58747,297 M 5650,550,04650,796MF Metrisches ISO Feingewinde / Metric ISO Fine thread / Filetage métrique ?n ISO / Filettatura metrica ISO ?ne / Rosca Métrica ISO Fina Kurzzeichen Thread size Désignation Diametro del ?letto Dimensión rosca (DIN 13) Bohrer-; Nominal size diamètre du foret Diametro nominale ;-Taladro (mm) (acc. to DIN 336) Innengewindekern-; Minor diameter / Diamètre du noyau ?leté / Diametro del nocciolo ;-nucleo de rosca interior (mm) min 6H m a x M 2 x 0,251,751,7291,785 M 2,2 x 0,251,951,9291,985 M 2,3 x 0,252,052,0292,085 M 2,5 x 0,352,152,1212,221 M 3 x 0,252,752,7292,785 M 3 x 0,352,652,6212,721 M 3,5 x 0,353,153,1213,221 M 4 x 0,353,653,6213,721 M 4 x 0,53,53,4593,599 M 4,5 x 0,543,9594,099 M 5 x 0,354,654,6214,721 M 5 x 0,54,54,4594,599 M 5 x 0,754,24,1884,378 M 6 x 0,55,55,4595,599 M 6 x 0,755,255,1885,378 M 7 x 0,56,56,4596,599 M 7 x 0,756,256,1886,378 M 8 x 0,57,57,4597,599 M 8 x 0,757,257,1887,378 M 8 x 176,9177,153 M 9 x 0,758,258,1888,378 M 9 x 187,9178,153 M 10 x 0,59,59,4599,599 M 10 x 0,759,259,1889,378 M 10 x 198,9179,153 M 10 x 1,258,758,6478,912 M 11 x 1109,91710,153 M 12 x 0,511,511,45911,599 M 12 x 11110,91711,153 M 12 x 1,2510,7510,64710,912 M 12 x 1,510,510,37610,676 M 13 x 11211,91712,153 M 14 x 0,7513,213,18813,378 M 14 x 11312,91713,153 M 14 x 1,2512,7512,64712,912 M 14 x 1,512,512,37612,676 M 15 x 11413,91714,153 M 15 x 1,513,513,37613,676 M 16 x 0,7515,215,18815,378 M 16 x 11514,91715,153 M 16 x 1,2514,814,64714,912 M 16 x 1.514,514,37614,676 M 17 x 11615,91716,153 M 18 x 11716,91717,153 M 18 x 1.516,516,37616,676 M 18 x 21615,83516,210 M 20 x 11918,91719,153 M 20 x 1.518,518,37618,676 M 20 x 21817,83518,210 M 22 x 12120,91721,153 M 22 x 1,520,520,37620,676 * 5H max Gewindekernl?cher für Gewindebohrer Tapping drill sizes for taps / Avant-trous de taraudage Prefori per maschi / Dimensiones de la broca previa para machos MARYLAND METRICS Technical Data Chart: A collection of Tapping drill sizes for taps in a multilingual format https://www.360docs.net/doc/878068502.html,
攻牙底孔参数
攻牙底孔的使用参数表 一、螺紋下孔徑表 1、公制粗牙螺紋JIS B 0209-1982(單位：mm) 螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑 最小直径最大直径 M1×0.25 0.75 0.78 (80%) 0.729 0.785 1.1 ×0.25 0.85 0.88 (80%) 0.829 0.885 1.2 ×0.25 0.95 0.98 (80%) 0.929 0.985 1.4 ×0.3 1.1 1.14 (80%) 1.075 1.142 1.6 ×0.35 1.25 1.32 (75%) 1.221 1.321 1.8 ×0.35 1.45 1.52 (75%) 1.421 1.521 2×0.4 1.6 1.65 (80%) 1.567 1.679 2.2 ×0.45 1.75 1.83 (75%) 1.713 1.838 2.5 ×0.45 2.1 2.13 (75%) 2.013 2.138 3×0.5 2.5 2.59 (75%) 2.459 2.599 3.5 ×0.6 2.9 3.01 (75%) 2.850 3.010 4×0.7 3.3 3.39 (80%) 3.242 3.422 4.5 ×0.75 3.8 3.85 (80%) 3.688 3.878 5×0.8 4.2 4.31 (80%) 4.134 4.334 6×1 5 5.13 (80%) 4.917 5.153 7×1 6 6.13 (80%) 5.917 6.153 8×1.25 6.8 6.85 (85%) 6.647 6.912 9×1.25 7.8 7.85 (85%) 7.647 7.912 10×1.5 8.5 8.62 (85%) 8.376 8.676 11×1.5 9.5 9.62 (85%) 9.376 9.676 12×1.75 10.3 10.40 (85%) 10.106 10.441 14×2 12 12.2 (85%) 11.835 12.210 16×2 14 14.2 (85%) 13.835 14.210 18×2.5 15.5 15.7 (85%) 15.294 15.744 20×2.5 17.5 17.7 (85%) 17.294 17.744 22×2.5 19.5 19.2 (85%) 19.294 19.744 24×3 21 21.2 (85%) 20.752 21.252 27×3 24 24.2 (85%) 23.752 24.252 30×3.5 26.5 26.6 (90%) 26.211 26.771 33×3.5 29.5 29.6 (90%) 29.211 29.771 36×4 32 32.1 (90%) 31.670 32.270 39 ×4 35 35.1 (90%) 34.670 35.270 42 ×4.5 37.5 37.6 (90%) 37.129 37.799 45 ×4.5 40.5 40.6 (90%) 40.129 40.799 48 ×5 43 43.1 (90%) 42.587 43.297 註(1)M1.4以下等級：5H、M1.6以上等級：6H (2)基於JIS B 0209-1982標準
普通螺纹攻丝前底孔尺寸(in)
普通螺纹攻丝前底孔尺寸 螺纹的直径和螺距钻孔直径车孔直径螺纹的直 径和螺距 钻孔直径车孔直径 铸铁 青铜 钢 黄铜 直径公差铸铁 青铜 钢 黄铜 直径公差 M4*0.7 M4*0.5 3.3 3.5 3.3 3.5 M27**3 M27*2 23.7 24.7 23.9 24.9 23.5 +0.3 M5*0.8 M5*0.5 4.1 4.4 4.2 4.5 M27*1.5 M27*1 25.3 25.8 25.5 26 M6*1 M6*0.75 4.9 5.1 5 5.2 4.9 - +0.3 M30*3.5 M30*3 26 26.7 26.2 26.9 26 +0.3 M8*1.25 M8*1 6.6 6.9 6.7 7 6.6 - +0.2 M30*2 M30*1.5 27.7 28.3 27.9 28.5 M10*1.5 M10*1.25 M10*1 8.4 8.6 8.9 8.5 8.7 9 8.3 - - +0.25 M33*3.5 M33*3 M33*2 29 29.7 30.7 29.2 29.9 30.9 29 +0.3 M12*1.75 M12*1.5 M12*1.25 M12*1 10.1 10.4 10.6 10.9 10.2 10.5 10.7 11 10 +0.25 M33*1.5 M36*4 M36*3 M36*1.5 31.3 31.5 32.7 34.3 31.5 31.7 32.9 34.5 - 31.4 32.5 34.3 - +0.3 +0.17 +0.17 M14*2 M14*1.5 M14*1 11.8 12.4 12.9 11.9 12.5 13 11.7 +0.3 M39*4 M39*3 M39*1.5 34.6 35.7 37.3 34.8 35.9 37.5 34.4 35.5 37.3 +0.3 +0.17 +0.17 M16*2 M16*1.5 M16*1 13.8 14.4 14.9 13.9 14.5 15 13.7 +0.3 M42*4.5 M42*3 M42*1.5 37.1 38.7 40.3 37.3 38.9 40.5 36.8 38.5 40.3 +0.3 +0.17 +0.17 M18*2.5 M18*2 M18*1.5 M18*1 15.3 15.8 16.4 16.9 15.4 15.9 16.5 17 15.1 +0.3 M45*4.5 M45*3 M45*1.5 40 41.8 43.3 40.2 42 43.5 39.8 41.5 43.3 +0.3 +0.17 +0.17 M20*2.5 M20*2 M20*1.5 M20*1 17.2 17.7 18.3 18.8 17.4 17.9 18.5 19 17.1 +0.3 M48*5 M48*3 M48*1.5 42.5 44.8 46.3 42.7 45 46.5 42.2 44.5 46.3 +0.3 +0.17 +0.17 M22*2.5 M22*2 M22*1.5 M22*1 19.2 19.7 20.3 20.8 19.4 19.9 20.5 21 19.1 +0.3 M52*5 M52*3 M52*1.5 46.4 48.8 50.3 46.6 49 50.5 46.2 48.5 50.2 +0.3 +0.17 +0.17 M24*3 M24*2 M24*1 20.7 21.7 22.8 20.9 21.9 23 20.5 +0.3 M56*5.5 M56*4 M56*2 - - - - - - 49.7 51.4 53.7 +0.3 +0.2 +0.2
最全的螺纹孔径对照表
最大最小最大最小G4-G6G7-G8G9M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98最大M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.25 1.06 1.08G 1/167.72 6.84M1.4*0.3 1.10 1.142 1.075M14*1.013.0013.15312.917M1.4*0.3 1.24 1.25G(PF)1/89.738.85M1.6*0.35 1.25 1.321 1.221M15*1.513.5013.67613.376M1.6*0.35 1.41 1.431/413.1611.89M1.7*0.35 1.35 1.421 1.321M15*1.014.0014.15313.917M1.7*0.35 1.51 1.533/816.6615.40M1.8*0.35 1.45 1.521 1.421M16*1.514.5014.67614.376M1.8*0.35 1.61 1.631/220.9619.17M2.0*0.4 1.60 1.679 1.567M16*1.015.0015.15314.917M2*0.4 1.78 1.805/822.9121.13M2.2*0.45 1.75 1.838 1.713M17*1.515.5015.67615.376M2.2*0.45 1.95 1.983/426.4424.66M2.3*0.4 1.90 1.979 1.867M17*1.016.0016.15315.917M2.3*0.4 2.08 2.107/830.2028.42M2.5*0.45 2.10 2.138 2.013M18*2.016.0016.21015.835M2.5*0.45 2.25 2.28133.2530.93M2.6*0.45 2.20 2.238 2.113M18*1.516.5016.67616.376M2.6*0.45 2.35 2.38 1.12537.9035.58M3.0*0.5 2.50 2.599 2.459M18*1.017.0017.15316.917M3.0*0.5 2.73 2.75 1.2541.9139.59M3.0*0.6 2.40 2.440 2.280M20*2.018.0018.21017.835M3.5*0.6 3.17 3.20 1.37544.3242.01M3.5*0.6 2.90 3.010 2.850M20*1.518.5018.67618.376M4.0*0.7 3.62 3.65 3.69 1.547.8049.02M4.0*0.7 3.30 3.422 3.242M20*1.019.0019.15318.917M5.0*0.8 4.56 4.60 4.64 1.62551.9150.79M4.0*0.75 3.25 3.326 3.106M22*2.020.0020.21019.835M6.0*1.0 5.45 5.50 5.55 1.7553.7556.66 M4.5*0.75 3.80 3.878 3.688M22*1.520.5020.67620.376M7.0*1.0 6.45 6.50 6.552 59.61 M5.0*0.8 4.20 4.334 4.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44M5.0*0.9 4.10 4.170 3.930M24*2.022.0022.21021.835M10*1.59.189.259.32M6.0*1.0 5.00 5.153 4.917M24*1.522.5022.67622.376M10*1.259.319.389.44M7.0*1.0 6.00 6.153 5.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.21M8.0*1.25 6.80 6.912 6.647M25*2.023.0023.21022.835M12*1.25 11.3111.3811.44 M9.0*1.257.807.9127.647M25*1.523.5023.67623.376最大M10*1.58.508.6768.376M25*1.024.0024.15323.917PS 1/16 - 28 6.50 6.632M11*1.59.509.6769.376M26*1.524.5024.67624.376PS 1/8 - 288.508.637M12*1.7510.3010.44110.106M27*2.025.0025.21024.835PS 1/4 - 1911.4011.549M14*2.012.0012.21011.835M27*1.525.5025.67625.376PS 3/8 - 1915.0015.054M16*2.014.0014.21013.835M27*1.026.0026.15325.917PS 1/2 - 1418.5018.773M18*2.515.5015.74415.294M28*2.026.0026.21025.835PS 3/4 - 1424.0024.259M20*2.517.5017.74417.294M28*1.526.5026.67626.376PS 1 - 1130.2030.471M22*2.519.5019.74419.294M28*1.027.0027.15326.917规格PS 1-1/4 - 1138.8039.132M24*3.021.0021.25220.752M30*3.027.0027.25226.752(UNC) 最大最小PS 1-1/2 - 1144.8045.025M27*3.024.0024.25223.752M30*2.028.0028.21027.835 (螺丝牙外径) PS 2 - 11 56.50 56.836 M30*3.5 26.50 26.771 26.211 M30*1.528.5028.67628.376No.1-64(1.854) 1.55 1.582 1.425M30*1.029.0029.15328.917No.2-56(2.184) 1.80 1.871 1.695M32*2.030.0030.21029.835No.3-48(2.515) 2.10 2.146 1.941M32*1.530.5030.67630.376No.4-40(2.845) 2.30 2.385 2.157M33*3.030.0030.25229.752No.5-40(3.175) 2.60 2.697 2.487M33*2.031.0031.21030.835No.6-32(3.505) 2.80 2.895 2.642最大最小M33*1.531.5031.67631.376No.8-32(4.166) 3.40 3.530 3.302M1.0*0.20.800.8210.783M35*1.533.5033.67633.376No.10-24(4.826) 3.90 3.962 3.683M1.1*0.20.900.9210.883M36*3.033.0033.25232.752No.12-24(5.486) 4.50 4.597 4.344PT 1/16 -28 6.10 6.20 6.244 6.384M1.2*0.2 1.00 1.0210.983M36*2.034.0034.21033.8351/4 - 20 5.10 5.257 4.979PT 1/8 -288.108.208.4298.388M1.4*0.2 1.20 1.221 1.183M36*1.5 34.50 34.67634.376 5/16 - 18 6.60 6.731 6.401PT 1/4 -1910.7011.0010.96211.174M1.6*0.2 1.40 1.421 1.3833/8 - 168.008.1537.798PT 3/8 -1914.2014.5014.44814.658M1.7*0.2 1.45 1.500 1.4607/16 - 149.409.5509.144PT 1/2 -1417.6018.0017.97918.263M1.8*0.2 1.60 1.621 1.5831/2 - 1310.8011.02310.592PT 3/4 -1423.0023.5023.37823.663M2.0*0.25 1.75 1.785 1.7299/16 - 1212.2012.44611.989PT 1 -1129.0029.5029.45929.822M2.2*0.25 1.95 1.985 1.929规格5/8 - 1113.6012.86813.386PT 1-1/4 -1137.5038.0037.97638.339M2.3*0.25 2.05 2.061 2.001(UNF) 最大最小3/4 - 1016.5018.84016.307PT 1-1/2 -1143.4044.0043.86944.232M2.5*0.35 2.20 2.221 2.1217/8 - 919.5019.76119.177PT 2 -11 54.9055.5055.41255.844 M2.6*0.35 2.20 2.246 2.186No.0-80(1.524) 1.25 1.305 1.182 1 - 822.2022.60621.971M3.0*0.35 2.70 2.721 2.621No.1-72(1.854) 1.55 1.612 1.4741-1/8 - 725.0025.34924.638M3.5*0.35 3.20 3.221 3.121No.2-64(2.184) 1.85 1.912 1.7561-1/4 - 728.2028.52427.813M4.0*0.5 3.50 3.599 3.459No.3-56(2.515) 2.10 2.197 2.0251-3/8 - 630.8031.11530.353M4.5*0.5 4.00 4.099 3.959No.4-48(2.845) 2.40 2.458 2.2711-1/2 - 634.0034.29033.528M5.0*0.5 4.50 4.599 4.459No.5-44(3.175) 2.70 2.740 2.5511-3/4 - 5 39.5039.82738.964M5.5*0.5 5.00 5.099 4.959No.6-40(3.505) 2.90 3.022 2.820 2 - 4-1/245.20 45.593 44.679 使用绞刀时不用绞刀时 M6.0*0.75 5.30 5.378 5.188No.8-36(4.166) 3.50 3.606 3.4041/16 - 27 6.10 6.25M6.0*0.5 5.50 5.550 5.400No.10-32(4.826) 4.10 4.165 3.9631/8 -278.338.43M7.0*0.75 6.30 6.378 6.188No.12-28(5.846) 4.60 4.724 4.4961/4 -1810.7211.13M7.0*0.5 6.50 6.550 6.4001/4 - 28 5.50 5.588 5.3603/8 -1814.2714.27M8.0*1.07.007.153 6.9175/16 - 24 6.907.035 6.782规格1/2 -1417.4817.86M8.0*0.757.307.3787.1883/8 - 248.508.6368.382(UNEF)最大最小3/4 -1422.6323.01M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No.12 - 32 4.70 4.826 4.623 1 -11-1/228.5828.98M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 32 5.60 5.690 5.4861-1/4 -11-1/237.3137.69M9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.107.2647.0871-1/2 -11-1/243.6644.04M10*1.258.808.9128.4675/8 - 1814.5014.68114.3513/8 - 328.708.8658.661 2 -11-1/2 55.5855.96 M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.2010.33810.135M10*0.759.309.3789.1887/8 - 1420.5020.67520.2701/2 - 2811.8011.93811.709M10*0.59.509.5209.400 1 - 1223.2023.57123.1149/16 - 2413.2013.38613.132M11*1.010.0010.1539.9171-1/8 - 1226.5026.74626.2895/8 - 2414.8014.98614.732M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.8017.95817.678M12*1.510.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.0021.13320.853M12*1.25 10.80 10.91210.647 1-1/2 - 1236.0 36.271 35.814 1 - 20 24.00 24.30824.028 规 格使用绞刀时不用绞刀时 有效牙部之长度(最小)中之母螺牙内径 标准长度(最小)中之母螺牙内径 螺 纹 攻 牙 钻 孔 径 和 滚 造 径 对 照 表 英制平行管用螺紋PF(G) (單位：mm) 大 径钻孔径 规格公 制 细 螺 纹 规格 标准径2级牙钻孔径标准径 2级牙钻孔径美 制 特 细 螺 纹 规 格 (螺丝牙外径) 美 制 细 螺 纹 美 制 管 螺 纹 钻 孔 径 标准径 美 制 粗 螺 纹 标准径2级牙钻孔径公 制 粗 螺 纹 公 制 迫 牙 丝 攻 钻 孔 径 规 格精 度 等 级公 制 细 螺 纹 2级牙钻孔径标准径规格14.95 18.6320.5924.12最小6.568.5711.4541.3745.4949.6751.4327.8830.2934.9438.958.49511.341英 制 管 螺 纹 钻孔径 最小规格标准径N P T 14.84623.97530.11138.77218.48944.66556.476 英 制 管 螺 纹 规格18.2623.4229.366.3511.1314.68N P S 44.4556.36 38.108.7457.30 6.490注：迫牙丝攻之钻孔径，在上表所列之数值，由于被加工 材料之材质、硬度、形状、尺寸等之影响，多少会有所变动，因此于参考上表之同时，亦请增减若干。 标准径2级牙钻孔径标准径 2级牙钻孔径
攻牙下孔径对照表
建議下孔徑Recommended Tap Drill Sizes ◎公製牙
● ● D1：Minor diameter of JIS Class 2 internal thread. But, the minor diameters D1 shown in ( ) are of JIS Class I internal threads because their nominal sizes are not specified in JIS Class 2. ● * Marked sizes have been eliminated from JIS since 1969. ◎公製牙
● The reccommended tap drill sizes indicated above are for JIS Class 2 Metric threads. ● D1：Minor diameter of JIS Class 2 internal thread. But, the minor diameters D1 shown in ( ) are of JIS Class I internal threads because their nominal sizes are not specified in JIS Class 2. ◎美製牙─ UNC，UNF
● The recommended tap drill sizes indicated above are for JIS Class 2B UNC & UNF threads, and ANSI BI . Ia Class 2B UNEF & UN threads. ● D1：Minor diameter of internal thread. For UNC and UNF threads, according to JIS Class 2B; For UNEF and UN threads, according to ANSI BI . Ia, Class 2B. ◎英製牙─ BSW ● The recommended tap drill sizes indicated above are for JIS Class 2 Whitworth threads. ● Generally, the tap drill sizes in column A are used for producing holes; When holes tend to be cut oversized, the tap drill sizes in column B should be selected. ● These tap drill sizes are in accordance with JIS B 1004-1966, while the nominal sizes with a * mark are in accordance with BSW (Please refer to page 135).
攻牙底孔的使用参数表
攻牙底孔的使用参数表 发布:admin | 发布时间: 2011年7月18日 攻牙底孔的使用参数表 一、螺紋下孔徑表 1、公制粗牙螺紋 JIS B 0209-1982(單位：mm) 螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑 最小直径最大直径 M 1 × 0.25 0.75 0.78 (80%) 0.729 0.785 1.1 × 0.25 0.85 0.88 (80%) 0.829 0.885 1.2 × 0.25 0.95 0.98 (80%) 0.929 0.985 1.4 × 0.3 1.1 1.14 (80%) 1.075 1.142 1.6 × 0.35 1.25 1.32 (75%) 1.221 1.321 1.8 × 0.35 1.45 1.52 (75%) 1.421 1.521 2 × 0.4 1.6 1.65 (80%) 1.567 1.679 2.2 × 0.45 1.75 1.83 (75%) 1.713 1.838 2.5 × 0.45 2.1 2.13 (75%) 2.013 2.138 3 × 0.5 2.5 2.59 (75%) 2.459 2.599 3.5 × 0.6 2.9 3.01 (75%) 2.850 3.010 4 × 0.7 3.3 3.39 (80%) 3.242 3.422 4.5 × 0.75 3.8 3.85 (80%) 3.688 3.878 5 × 0.8 4.2 4.31 (80%) 4.134 4.334 6 × 1 5 5.13 (80%) 4.91 7 5.153 7 × 1 6 6.13 (80%) 5.917 6.153 8 × 1.25 6.8 6.85 (85%) 6.647 6.912 9 × 1.25 7.8 7.85 (85%) 7.647 7.912 10 × 1.5 8.5 8.62 (85%) 8.376 8.676 11 × 1.5 9.5 9.62 (85%) 9.376 9.676 12 × 1.75 10.3 10.40 (85%) 10.106 10.441 14 × 2 12 12.2 (85%) 11.835 12.210 16 × 2 14 14.2 (85%) 13.835 14.210 18 × 2.5 15.5 15.7 (85%) 15.294 15.744 20 × 2.5 17.5 17.7 (85%) 17.294 17.744 22 × 2.5 19.5 19.2 (85%) 19.294 19.744 24 × 3 21 21.2 (85%) 20.752 21.252 27 × 3 24 24.2 (85%) 23.752 24.252 30 × 3.5 26.5 26.6 (90%) 26.211 26.771 33 × 3.5 29.5 29.6 (90%) 29.211 29.771 36 × 4 32 32.1 (90%) 31.670 32.270 39 × 4 35 35.1 (90%) 34.670 35.270 42 × 4.5 37.5 37.6 (90%) 37.129 37.799 45 × 4.5 40.5 40.6 (90%) 40.129 40.799
螺纹攻丝及常见问题解决【彻底解决】
螺纹攻丝及常见问题解决【彻底解决】
彻底搞定螺纹攻丝及常见问题解决 内容来源网络，由“深圳机械展（11万㎡，1100多家展商，超10万观众）”收集整理！ 更多cnc加工中心、车铣磨钻床、线切割、数控刀具工具、工业机器人、非标自动化、数字化无人工厂、精密测量、3D打印、激光切割、钣金冲压折弯、精密零件加工等展示，就在深圳机械展. 螺牙的形状（标准公制螺纹） 1. 从图上知: P表示螺距是牙到牙尖或牙底之距离。 通常表示方法为M3×0.5 此0.5就是螺距,单位是mm。 （M代表Metric公制），3代表公称尺寸，所谓尺寸就是螺牙的大径或内螺纹的大(根)径。
2.一般螺牙如果规矩的话，则大径(或根径)必须符合螺牙的公称尺寸，而中径(内螺纹同)及小径(内螺纹称内径)必须符合规格上所查到的数字 如果是细螺纹则间隙变小，其大、中、小径变随之改变。 3.英制牙则相同只是螺距的表示法为1英寸内有多少牙，如: 1/4-20UNC,即外螺纹1/4”大径(6.35mm)每英寸有20牙。
UNC(UNFIED THREAD) C表粗牙； F表细牙； EF表极细牙； C,F,EF各有不同螺距。 4.螺纹规的用法(分螺柱，及螺圈) A.了解构造 (1)T(通)端通常比Z(止)端长； (2)英制中间有一条沟者为通端； (3)一般为硬化(淬火)之钢料研磨，很脆掉在地上会断； (4)经长期使用会磨损,一般在10000次以上需再检验。 B.使用方法 必须经品保检验合格或合格标签(贴在盒子上)者才得使用。长期使用必须用约1万次(可以估算)后送检合格再用。
以戴手套的拇指，食指夹住轻旋,忌用大力，则T(通)端施到底为合格，Z(止)端为进1~2牙后，不再进入为合格，绝不可用大力，当用完螺纹规后，必须要以干净的软布将螺纹规(样圈或样柱)予以擦拭干净，涂上防锈油后装回盒子里。 C.攻牙的正确方法 (1)选择合适的丝攻 丝攻有一攻，二攻，三攻，一般我们用第三攻，除非很厚的板材，才分一、二、三攻一般用机用丝攻(只有一次)即可。 (2)丝攻形状可分为 普通丝攻 螺旋丝攻：比较贵，但排屑良好，效率比较高； 先端丝锥：比较贵，但排屑良好，效率比较高； 无屑丝攻：利用挤压的方式将薄料，(一般在3M/M以下)挤压成螺丝状,故孔较普通丝攻及螺纹丝攻所开的孔为大，例: M3-0.5 普通及螺旋丝攻一般铁板牙钻2.6孔，但无屑丝攻，钻孔2.78~2.8孔。
螺纹底孔与攻牙后的孔径对照表
螺纹底孔与攻牙后的孔径对照表 以下是常用粗牙公制螺纹钻底孔尺寸对应表。一般情况等于外径-螺距 M1 Φ0.75 M2 Φ1.6 M3 Φ2.5 M4 Φ3.3 M5 Φ4.2 M6 Φ5 M8 Φ6.75 M10 Φ8.5 M12 Φ10.25 M14 Φ12 M16 Φ14 M18 Φ15.5 M20 Φ17.5 M22 Φ19.5 M24 Φ21 M27 Φ24 M30 Φ26.5 螺纹钻孔底径计算 一般按下列公式： 1.攻公制螺纹：螺距t<1毫米，dz=d-t t＞1毫米，dz=d-（1.04～1.06)t 式中t——螺距（毫米） dz——攻丝前钻孔直径（毫米） d——螺纹公称直径（毫米） 2.攻英制螺纹： 螺纹公称直径铸铁与青铜钢与黄铜 3/16"～5/8" dz＝25（d-1/n) dz＝25（d-1/n)+0.1 3/4"～11/2" dz＝25（d-1/n) dz＝25（d-1/n) +0.2 式中dz——攻丝前钻孔直径（毫米） d——螺纹公称直径（英寸） n——每英寸牙数 首先，要知道螺纹的外径D,螺距T,螺纹底孔直径d=D-T。 攻螺纹前钻底孔直径和深度的确定以及孔口的倒角 （1）底孔直径的确定丝锥在攻螺纹的过程中，切削刃主要是切削金属，但还有挤压金属的作用，因而造成金属凸起 并向牙尖流动的现象，所以攻螺纹前，钻削的孔径（即底孔）应大于螺纹内径。 底孔的直径可查手册或按下面的经验公式计算：
脆性材料（铸铁、青铜等）：钻孔直径d0=d(螺纹外径)-1.1p（螺距） 塑性材料（钢、紫铜等）：钻孔直径d0=d(螺纹外径)-p（螺距） （2）钻孔深度的确定攻盲孔（不通孔）的螺纹时，因丝锥不能攻到底，所以孔的深度要大于螺纹的长度， 盲孔的深度可按下面的公式计算： 孔的深度=所需螺纹的深度+0.7d 普通螺纹底孔直径简单计算可按下式 要攻丝的尺寸乘上0.85 如：M3--2.4mm M4--3.1mm M5--4.2m M6--5.1mm M8--6.8mm 公制螺纹的计算方法： 底径=大径-1.0825*螺距 英制螺纹的计算方法： 底径=大径-1.28*螺距 脆性材料钻孔直径D=d(螺纹外径)-1.1p（螺距） 塑性材料钻孔直径D=d(螺纹外径)-p（螺距） 除了以上的经验公司外,还要考虑螺纹的公差等级. 普通公制螺纹用外径-螺距。记这个最直观 螺纹外径计算方法(2009/09/06 19:48) 公制螺纹(MM牙) 牙深=0.6495*牙距P (牙角60度) 内牙孔径= 公称直径-1.0825*P M20x2.5-6H/7g (右手)-(单头螺纹)-(公制粗牙) (公称直径20mm) (牙距2.5mm) (内螺纹配合等级6H) (外螺纹配合等级7g) 左-双头-M20x1.5 (左手)-(双头螺纹)-(公制细牙) (公称直径20mm) (牙距1.5mm) 美制螺纹 (统一标准螺纹) 牙深= 0.6495*(25.4/每吋牙数) (牙角60度) 3/4-10UNC-2A (UNC粗牙)(UNF细牙) (1A 2A 3A 外牙公差配合等级) (1B 2B 3B 内牙公差配合等级)