丝锥用底孔钻头直径表
(螺纹牙型高度为75%时的推荐钻头尺寸)
| 准备攻丝的螺纹 |
钻头规格代码 |
(最接近的英制分数规格) |
英制小数规格 |
| 0-80UNF |
3/64" |
3/64" |
.0469 |
| 1-64UNC |
#53 |
- |
.0595 |
| 1-72UNF |
#53 |
1/16" |
.0595 |
| 2-56UNC |
#50 |
- |
.0700 |
| 2-64UNF |
#50 |
- |
.0700 |
| 3-48UNC |
#47 |
5/64" |
.0785 |
| 3-56UNF |
#45 |
- |
.0820 |
| 4-36UNS |
#44 |
- |
.0860 |
| 4-40UNC |
#43 |
3/32" |
.0890 |
| 4-48UNF |
#42 |
3/32" |
.0935 |
| M3×0.60 |
2.5mm |
- |
.0984 |
| 1/8-40UNS |
#38 |
- |
.1015 |
| 5-40UNC |
#38 |
- |
.1015 |
| 5-44UNF |
#37 |
- |
.1040 |
| 6-32UNC |
#35 |
7/64" |
.1100 |
| 6-36UNS |
#34 |
- |
.1110 |
| 6-40UNF |
#33 |
- |
.1130 |
| 6-48UNS |
#31 |
- |
.1200 |
| M4×0.70 |
3.4mm |
- |
.1338 |
| M4×0.75 |
3.4mm |
- |
.1338 |
| 8-32UNC |
#29 |
- |
.1360 |
| 8-36UNF |
#29 |
9/64" |
.1360 |
| 8-40UNS |
#28 |
- |
.1405 |
| 3/16"-24UNS |
#26 |
- |
.1470 |
| 10-24UNC |
#25 |
5/32" |
.1495 |
| 3/16"-32UNS |
#22 |
- |
.1570 |
| 10-32UNF |
#21 |
5/32" |
.1590 |
| M5×0.90 |
4.2mm |
- |
.1653 |
| M5×0.80 |
4.3mm |
- |
.1693 |
| 12-24UNC |
#16 |
11/64" |
.1770 |
| 12-28UNF |
#14 |
3/16" |
.1820 |
| 12-32NEF |
#13 |
- |
.1850 |
| 14-20UNS |
#10 |
- |
.1935 |
| 1/4"-20UNC |
#7 |
13/64" |
.2010 |
| 14-24UNS |
#7 |
- |
.2010 |
| M6×1.00 |
5.2mm |
- |
.2047 |
| 1/4"-24UNS |
#4 |
- |
.2090 |
| 1/4"-28UNF |
#3 |
7/32" |
.2130 |
| 1/4"-32NEF |
7/32" |
7/32" |
.2188 |
| 1/4"-40UNS |
#1 |
- |
.2280 |
| M7×1.00 |
6.1mm |
15/64" |
.2401 |
| 5/16"-18UNC |
字母F |
17/64" |
.2570 |
| M8×1.25 |
6.9mm |
17/64" |
.2716 |
| 5/16"-24UNF |
字母I |
- |
.2720 |
| M8×1.00 |
7.1mm |
- |
.2795 |
| 5/16"-32NEF |
9/32" |
9/32" |
.2812 |
| M9×1.2 |
7.9mm |
- |
.3110 |
| 3/8"-16UNC |
5/16" |
5/16" |
.3125 |
| M9×0.75 |
8.3mm |
- |
.3268 |
| M9×1.00 |
8.1mm |
- |
.3189 |
|
| 准备攻丝的螺纹 |
钻头规格代码 |
(最接近的英制分数规格) |
英制小数规格 |
| 3/8"-24UNF |
字母Q |
21/64" |
.3320 |
| M10×1.50 |
8.7mm |
- |
.3425 |
| M10×1.25 |
8.9mm |
11/32" |
.3503 |
| M10×1.00* |
9.1mm |
- |
.3583 |
| 7/16"-14UNC |
字母U |
23/64" |
.3680 |
| M11×1.50 |
9.7mm |
- |
.3818 |
| 7/16"-20UNF |
25/64" |
25/64" |
.3906 |
| M12×1.75 |
10.5mm |
- |
.4133 |
| M12×1.50 |
10.7mm |
27/64" |
.4212 |
| 1/2"-13UNC |
27/64" |
27/64" |
.4219 |
| M12×1.25* |
10.9mm |
27/64" |
.4291 |
| 1/2"-20UNF |
29/64" |
29/64" |
.4531 |
| 1/2"-24UNS |
29/64" |
29/64" |
.4531 |
| M14×2.00 |
12.2mm |
- |
.4803 |
| 9/16"-12UNC |
31/64" |
31/64" |
.4844 |
| M14×1.50 |
12.7mm |
- |
.4999 |
| M14×1.25* |
12.8mm |
- |
.5039 |
| 9/16"-18UNF |
33/64" |
33/64" |
.5156 |
| 5/8"-11UNC |
17/32" |
17/32" |
.5312 |
| M16×2.00 |
14.2mm |
35/64" |
.5590 |
| 5/8"-18UNF |
37/64" |
37/64" |
.5781 |
| M16×1.50 |
14.7mm |
- |
.5787 |
| 11/16"-11UNS |
19/32" |
19/32" |
.5938 |
| M18×2.50 |
15.8mm |
39/64" |
.5220 |
| 11/16"-16UNS |
5/8" |
5/8" |
.6250 |
| 3/4"-10UNC |
21/32" |
21/32" |
.6562 |
| M18×1.50* |
16.8mm |
- |
.6614 |
| 3/4"-16UNF |
11/16" |
11/16" |
.6875 |
| M20×2.50 |
17.8mm |
11/16" |
.7008 |
| 7/8"-9UNC |
49/64" |
49/64" |
.7656 |
| 7/8"-14UNF |
13/16" |
13/16" |
.8125 |
| M22×1.50 |
20.9mm |
- |
.8228 |
| 7/8"-18UNS* |
53/64" |
53/64" |
.8281 |
| M24×3.00 |
21.4mm |
53/64" |
.8425 |
| 1"-8UNC |
7/8" |
7/8" |
.8750 |
| M24×2.00 |
22.3mm |
- |
.8779 |
| 1"-12UNF |
59/64" |
59/64" |
.9219 |
| 1"-14UNS |
15/16" |
15/16" |
.9375 |
| 11/8"-7 UNC |
63/64" |
63/64" |
.9844 |
| 11/8"-12 UNF |
13/64" |
13/64" |
1.0469 |
| 11/4"-7 UNC |
17/64" |
17/64" |
1.1094 |
| 11/4"-12 UNF |
111/64" |
111/64" |
1.1719 |
| 13/8"-6 UNC |
17/32" |
17/32" |
1.2188 |
| 13/8"-12 UNF |
119/64" |
119/64" |
1.2969 |
| 11/2"-6 UNC |
111/32" |
111/32" |
1.3438 |
| 11/2"-12 UNF |
127/64" |
127/64" |
1.4219 | |
|
NPT螺纹底孔表
(螺纹牙型高度为75%时的推荐钻头尺寸) |
| 准备攻丝的螺纹 |
钻头规格代码 |
(最接近的英制分数规格) |
英制小数规格 |
| 1/8"-27NPT |
字母R |
- |
.3390 |
| 1/4"-18NPT |
7/16" |
7/16" |
.4375 |
| 3/8"-18NPT |
37/64" |
37/64" |
.5781 |
| 1/2"-14NPT |
45/64" |
45/64" |
.7031 |
| 3/4"-14NPT |
59/64" |
59/64" |
.9219 |
| 1"-11½ NPT |
15/32" |
15/32" |
1.1562 |
| 1¼"-11 ½ NPT |
1½" |
1½" |
1.5000 |
| 1½"-11 ½ NPT |
147/64" |
147/64" |
1.7344 |
| 2"-11½ NPT |
27/32" |
27/32" |
2.2188 |
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