1 3/8-18UNF内螺纹的内径尺寸是多少？ 螺纹公式1- 3/8-18UNEF外径怎么算？
1 3/8-18UNF\u5185\u87ba\u7eb9\u7684\u5185\u5f84\u5c3a\u5bf8\u662f\u591a\u5c11\uff1f\u7528\u516c\u5236\u7684\u7b97\u6cd5\uff0c\u5185\u5b54\u5927\u5f84\u4e3a1-3/8\uff0c34.925mm\uff0c\u6240\u4ee5\u5c0f\u5f84\uff08\u5c31\u662f\u5e95\u5b54\uff09\u8fd1\u4f3c\u4e3a31.68-32.18mm\u3002
\u8fd9\u662f\u7f8e\u5236\u87ba\u7eb9\u7684\u6807\u6ce8\u65b9\u5f0f\u3002UNEF\u662f\u7279\u7ec6\u7259\uff0c\u7259\u578b\u89d2\u5ea660\u00b0\uff0c
\u5916\u5f84\u5c31\u662f1 3/8\u82f1\u5bf8\uff0c\u6362\u7b97\u6210\u516c\u5236\u5c31\u662f1 3/8*25.4=34.925mm\u3002
\u6bcf\u82f1\u5bf8\u91cc\u670918\u7259\uff0c\u90a3\u4e48\u87ba\u8ddd\u5c31\u76f8\u5f53\u4e8e1/18*25.4\u22481.411mm\u3002
\u5e95\u5f84\u5c31\u662f34.925-1.411=33.514\u3002
公 制 粗 螺 纹规格 标准径 2级牙钻孔径 最大 最小 M1.0×0.25 0.75 0.785 0.729 M1.1×0.25 0.85 0.885 0.829 M1.2×0.25 0.95 0.985 0.929 M1.4×0.3 1.10 1.142 1.075 M1.6×0.35 1.25 1.321 1.221 M1.7×0.35 1.35 1.421 1.321 M1.8×0.35 1.45 1.521 1.421 M2.0×0.4 1.60 1.679 1.567 M2.2×0.45 1.75 1.838 1.713 M2.3×0.4 1.90 1.979 1.867 M2.5×0.45 2.10 2.138 2.013 M2.6×0.45 2.20 2.238 2.113 M3.0×0.5 2.50 2.599 2.459 M3.0×0.6 2.40 2.44 2.280 M3.5×0.6 2.90 3.010 2.850 M4.0×0.7 3.30 3.422 3.242 M4.0×0.75 3.25 3.326 3.106 M4.5×0.75 3.80 3.878 3.688 M5.0×0.8 4.20 4.334 4.134 M5.0×0.9 4.10 4.170 3.930 M6.0×1.0 5.00 5.153 4.917 M7.0×1.0 6.00 6.153 5.917 M8.0×1.25 6.80 6.912 6.647 M9.0×1.25 7.80 7.912 7.647 M10×1.5 8.50 8.676 8.376 M11×1.5 9.50 9.676 9.376 M12×1.75 10.30 10.441 10.106 M14×2.0 12.00 12.210 11.735 M16×2.0 14.00 14.210 13.835 M18×2.5 15.50 15.744 15.294 M20×2.5 17.50 17.744 17.294 M22×2.5 19.50 19.744 19.294 M24×3.0 21.00 21.252 2.752 M27×3.0 24.00 24.252 23.752 M30×3.5 26.50 26.771 26.211
公 制 细 螺 纹规格 标准径 2级牙钻孔径 最大 最小 M1.0×0.2 0.80 0.821 0.783 M1.1×0.2 0.90 0.921 0.883 M1.2×0.2 1.00 1.021 0.983 M1.4×0.2 1.20 1.221 0.183 M1.6×0.2 1.40 1.421 1.383 M1.7×0.2 1.45 1.500 1.460 M1.8×0.2 1.60 1.621 1.583 M2.0×0.25 1.75 1.785 1.729 M2.2×0.25 1.95 1.985 1.929 M2.3×0.25 2.05 2.061 2.001 M2.5×0.35 2.20 2.221 2.121 M2.6×0.35 2.20 2.246 2.186 M3.0×0.35 2.70 2.721 2.621 M3.5×0.35 3.20 3.221 3.121 M4.0×0.5 3.50 3.599 3.459 M4.5×0.5 4.00 4.099 3.959 M5×0.5 4.50 4.599 4.459 M5.5×0.5 5.00 5.099 4.959 M6.0×0.75 5.30 5.378 5.188 M6.0×0.5 5.50 5.550 5.400 M7.0×0.75 6.30 6.378 61.88 M7.0×0.5 6.50 6.550 64.00 M8.0×1.0 7.00 7.153 6.917 M8.0×0.75 7.30 7.378 7.188 M8×0.5 7.50 7.520 7.400 M9×1.0 8.00 8.153 7.917 M9×0.75 8.30 8.378 8.188 M10×1.25 8.80 8.912 8.647 M10×1.0 9.00 9.153 8.917 M10×0.75 9.30 9.378 9.188 M10×0.5 9.50 9.520 9.400 M11×1.0 10.00 10.153 9.917 M11×0.75 10.30 10.378 10.188 M11×1.5 10.50 10.676 10.376 M12×1.25 10.80 10.912 10.647
公 制 细 螺 纹规格 标准径 2级牙钻孔径 最大 最小 M12×1.0 11.00 11.153 10.917 M12×0.5 11.50 11.520 11.4 M14×1.5 12.50 12.676 12.376 M14×1.0 13.00 13.153 12.917 M15×1.5 13.50 13.676 13.376 M15×1.0 14.00 14.153 13.917 M16×1.5 14.50 14.676 14.376 M16×1.0 15.00 15.153 14.917 M17×1.5 15.50 15.676 15.376 M17×1.0 16.00 16.153 15.917 M18×2.0 16.00 16.210 15.835 M18×1.5 16.50 16.670 16.376 M18×1.0 17.00 17.153 16.917 M20×2.0 18.00 18.210 17.835 M20×1.5 18.50 18.676 18.376 M20×1.0 19.00 19.153 18.917 M20×2.0 20.00 20.210 19.835 M22×1.5 20.50 20.676 20.376 M22×1.0 21.00 21.153 20.917 M24×2.0 22.00 22.210 21.835 M24×1.5 22.50 22.676 22.376 M24×1.0 23.00 23.153 22.917 M25×2.0 23.00 23.210 22.835 M25×1.5 23.50 23.676 23.376 M25×1.0 24.00 24.153 23.917 M26×1.5 24.50 24.676 24.376 M27×2.0 25.00 25.210 24.835 M27×1.5 25.50 25.676 25.376 M27×1.0 26.00 26.153 25.917 M28×2.0 26.00 26.210 25.835 M28×1.5 26.50 26.676 26.376 M28×1.0 27.00 27.153 26.917 M30×3.0 27.00 27.252 26.752 M30×2.0 28.00 28.210 27.835 M30×1.5 28.50 28.676 28.376 M30×1.0 29.00 29.153 28.917 M32×2.0 30.00 30.210 29.835 M32×1.5 30.50 30.676 30.376 M33×3.0 30.00 30.252 29.752 M33×2.0 31.00 31.210 30.835 M33×1.5 31.50 31.376 31.376 M35×1.5 33.50 33.676 33.376 M36×3.0 33.00 33.252 32.752 M36×2.0 34.00 34.210 33.835 M36×1.5 34.50 34.676 34.376
美 制 细 螺 纹规格(UNF) 标准径 2级牙钻孔径 最大 最小 番数牙外径
NO.0-80(1.524) 1.25 1.305 1.182 NO.1-72(1.854) 1.55 1.612 1.474 NO.2-64(2.184) 1.85 1.912 1.756 NO.3-56(2.515) 2.10 2.197 2.025 NO.4-48(2.845) 2.40 2.458 2.271 NO.5-44(3.175) 2.70 2.740 2.551 NO.6-40(3.505) 2.90 3.022 2.820 NO.8-36(4.166) 3.50 3.606 3.404 NO.10-32(4.826) 4.10 4.165 3.963 NO.12-28(5.846) 4.60 4.724 4.496 1/4 -28 5.50 5.588 5.360 5/16 -24 6.90 7.035 6.782 3/8 -24 8.50 8.636 8.382 7/16 -20 9.90 10.033 9.729 1/2 -20 11.50 11.607 11.329 9/16 -18 12.90 13.081 12.751 5/8 -18 14.50 14.681 14.351 3/4 -16 17.50 14.678 17.323 7/8 -14 20.50 20.675 20.270 1 -12 23.20 23.571 23.114 1-1/8 -12 26.50 26.746 26.289 1-1/4 -12 29.50 29.921 29.464 1-3/8 -12 32.80 33.096 32.464 1-1/2 -12 36.00 36.270 35.814
无 屑 丝 攻 钻 孔 径规格 精度等级 RH4.5.6 RH7.8 RH9 M1.0×0.25 0.86 0.88 - M1.1×0.25 0.96 0.98 - M1.2×0.25 1.06 1.08 - M1.4×0.3 1.24 1.25 - M1.6×0.35 1.41 1.43 - M1.7×0.35 1.51 1.53 - M1.8×0.35 1.61 1.63 - M2.0×0.4 1.78 1.80 - M2.2×0.45 1.95 1.98 - M2.3×0.4 2.08 2.10 - M2.5×0.45 2.25 2.28 - M2.6×0.45 2.35 1.38 - M3.0×0.5 2.73 2.75 - M3.0×0.6 3.17 3.20 - M4.0×0.7 3.62 3.65 3.69 M5.0×0.8 4.56 4.60 4.64 M6.0×1.0 5.45 5.50 5.55 M7.0×1.0 6.45 6.50 6.55 M8.0×1.25 7.31 7.38 7.44 M10×1.5 9.18 9.25 9.32 M10×1.25 9.31 9.38 9.44 M12×1.75 11.04 11.12 11.21 M12×1.25 11.31 11.38 11.44 注:无槽丝攻之钻孔径,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，因此参考上表之同时,亦请增减若干.
美 制 管 螺 纹规格(UNEF) 标准径 2级牙钻孔径 最大 最小 NO.12 -32 4.70 4.826 4.623 1/4 -32 5.60 5.690 5.486 5/16 -32 7.10 7.264 7.087 3/8 -32 8.70 8.865 8.661 7/16 -28 10.20 10.338 10.135 1/2 -28 11.80 11.938 11.709 9/16 -28 13.20 13.386 13.132 5/8 -24 14.80 14.986 14.732 3/4 -20 17.80 17.958 17.678 7/8 -20 21.00 21.133 20.853 1 -20 24.00 24.308 24.028
美 制 粗 螺 纹规格(UNC) 标准径 2级牙钻孔径 番数牙外径 最大 最小 NO.1-64(1.854) 1.55 1.582 1.425 NO.2-56(2.184) 1.80 1.871 1.695 NO.3-48(2.515) 2.10 2.146 1.941 NO.4-40(2.845) 2.30 2.385 2.157 NO.5-40(3.175) 2.60 2.697 2.487 NO.6-32(3.505) 2.80 2.895 2.642 NO.8-32(4.166) 3.40 3.530 3.302 NO.10-24(4.826) 3.90 3.962 3.682 NO.12-24(5.846) 4.50 4.597 4.344 1/4 -20 5.10 5.257 4.979 5/16 -18 6.60 6.731 6.401 3/8 -16 8.00 8.153 7.987 7/16 -14 9.40 9.500 9.144 1/2 -13 10.80 11.023 10.592 9/16 -12 12.20 12.446 11.989 5/8 -11 13.60 12.868 13.386 3/4 -10 16.20 16.840 16.307 7/8 -9 19.50 19.761 19.177 1 -8 22.20 22.606 21.971 1-1/8 -7 25.00 25.349 24.638 1-1/4 -7 28.20 28.524 27.813 1-3/8 -6 30.80 31.115 30.353 1-1/2 -6 34.00 34.290 33.528 1-3/4 -5 39.50 39.827 38.964 2 -4-1/2 45.20 45.593 44.679
英 制 螺 纹规格 钻孔径 硬材 软材 W1/8 - 40 2.65 2.60 W5/32 - 32 3.25 3.20 W3/16 - 24 3.75 3.70 W1/4 - 20 5.10 5.00 W5/16 - 18 6.60 6.50 W3/8 - 16 8.00 7.90 W7/16 - 14 9.40 9.30 W1/2 - 12 10.70 10.50 W9/16 - 12 12.30 12.00 W5/8 - 11 13.70 13.50 W3/4 - 10 16.70 16.50 W7/8 - 9 19.50 19.30 W1 - 8 22.40 22.00 W1-1/8 - 7 25.00 24.80 W1-1/4 - 7 28.30 28.00
英 制 管 螺 纹规格 标准径 钻 孔 径 最大 最小 PS1/16 -28 6.50 6.632 6.490 PS1/8 -28 8.50 8.637 8.495 PS1/4 - 19 11.40 11.549 11.341 PS3/8 - 19 15.00 15.054 14.846 PS1/2 - 14 18.50 18.773 18.489 PS3/4 - 14 24.00 24.259 23.975 PS1 - 11 30.20 30.471 30.111 PS1-1/4 -11 38.80 39.132 38.772 PS1-1/2 -11 44.80 45.025 44.665 PS2 - 11 56.50 56.836 56.476
英 制 管 螺 纹规格 标准径 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 使用绞刀时 不用绞刀时 PT1/16 -28 6.10 6.2 6.244 6.384 PT1/8 -28 8.10 8.2 8.249 8.388 PT1/4 -19 10.70 11 10.962 11.174 PT3/8 -19 14.20 14.5 14.448 14.658 PT1/2 -14 17.60 18 17.979 18.263 PT3/4 -14 23.00 23.5 23.378 23.663 Pt1 -11 29.00 29.5 29.459 29.822 PT1-1/4 -11 37.50 38 37.976 38.339 PT1-1/2 -11 43.40 44 43.869 44.232 Pt2 -11 54.90 55.5 55.412 55.844
美 制 螺 纹 滚 造 径规格 钻孔径 NPT NPS 使用绞刀时 不用绞刀时 1/16 -27 6.1 6.25 6.35 1/8 -27 8.33 8.43 8.74 1/4 -18 10.72 11.13 11.13 3/8 -18 14.27 14.27 14.68 1/2 -14 17.48 17.86 18.26 3/4 -14 22.63 23.01 23.42 1 -11-1/2 28.58 28.98 29.36 1-1/4-11-1/2 37.31 37.69 38.1 1-1/2-11-1/2 43.66 44.04 44.45 2 -11-1/2 55.58 55.96 56.36
英 制 螺 纹 滚 造 径规格 滚造径 W 3/16 - 24 4.08 - 4.05 W 1/4 - 20 5.51 - 5.46 W 5/16 - 18 7.01 - 6.95 W 3/8 - 16 8.48 - 8.41 W 7/16 - 14 9.92 - 9.85 W 1/2 - 12 11.31 - 11.24 W 9/16 -12 12.89 - 12.82
公 制 螺 纹规格 滚造径 M3.0×0.5 2.63 2.60 M3.0×0.6 2.56 2.53 M3.5×0.6 3.06 3.03 M4.0×0.7 3.49 3.45 M4.0×0.75 3.45 3.41 M4.5×0.75 3.96 3.92 M5.0×0.8 4.43 4.38 M5.0×0.9 4.36 4.31 M6.0×1.0 5.30 5.25 M7.0×1.0 6.30 6.25 M8.0×1.0 7.28 - 7.23 M8.0×1.25 7.12 - 7.07 M9.0×1.25 8.12 - 8.07 M10×1.25 9.10 - 9.04 M10×1.5 8.97 - 8.91 M11×1.5 9.97 - 9.91 M12×1.5 10.92 - 10.87 M12×1.75 10.79 - 10.73 M14×2.0 12.63 - 12.56 M16×2.0 14.63 - 14.56 M18×2.5 16.31 - 16.23 M20×2.5 18.31 - 18.23 M22×2.5 20.31 - 20.23
针 车 用 螺 纹规格(UNC) 滚造径 SM 1/8 40 2.735 -2.688 SM 1/8 44 2.769 -2.722 SM 9/64 40 3.128 -3.083 SM 11/64 40 3.855 -3.805 SM 3/16 32 4.205 -4.155 SM 3/16 28 4.143 -4.093 SM 7/32 32 5.003 -4.955 SM 15/64 28 5.325 -4.955 SM 1/4 40 5.890 -5.735 SM 1/4 28 5.721 -5.366 SM 9/32 28 6.528 -6.648 SM 11/32 28 8.092 -8.432 SM 3/8 29 8.880 -8.015 SM 7/16 30 10.466 -10.401 SM 7/16 16 10.037 -9.967 SM 1/2 20 11.819 -11.749 SM 9/16 20 13.400 -13.425
美 制 粗 螺 纹规格(UNC) 滚造径 NO.5-40 2.70 - 2.67 NO.6-32 2.95 - 2.91 NO.8-32 3.60 - 3.57 NO.10-24 4.09 - 4.05 NO.12-24 4.75 - 4.70 1/4 -20 5.50 - 5.45 5/16 -18 6.98 - 6.93 3/8 -16 8.45 - 8.40 7/16 -14 9.89 - 9.83 1/2 -13 11.39 - 11.32 9/16 -12 12.87 - 12.80
美 制 细 螺 纹规格(UNF) 滚造径 NO.5-44 2.73 - 2.70 NO.6-40 3.05 - 3.02 NO.8-36 3.66 - 3.63 NO.10-32 4.26 - 4.80 NO.12-28 4.84 - 4.80 1/4 -28 5.72 - 5.68 5/16 -24 7.20 - 7.16 3/8 -24 8.79 - 8.74 7/16 -20 10.23 - 10.18 1/2 -20 11.82 - 11.76
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正确标注应该是1 3/8-18UNEF，基本小径是33.398，加工尺寸一般为33.6-33.8
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