螺纹螺距底孔粗牙细牙

螺纹粗牙和细牙的区别尺寸标注
摘要：
一、粗牙螺纹与细牙螺纹的区别
二、粗牙螺纹的特点与应用
三、细牙螺纹的特点与应用
四、如何选择合适的螺纹
正文：
螺纹是工程技术中广泛应用的一种连接方式，其中粗牙螺纹和细牙螺纹是常见的两种类型。

了解它们之间的区别，有助于我们选择更适合实际需求的螺纹。

一、粗牙螺纹与细牙螺纹的区别
粗牙螺纹和细牙螺纹的主要区别在于螺距和牙型。

粗牙螺纹的螺距较大，牙型较深，而细牙螺纹的螺距较小，牙型较浅。

二、粗牙螺纹的特点与应用
粗牙螺纹因其较大的螺距和较深的牙型，主要用于需要承受较大拉力和冲击力的场合。

它们在工程联结、设备安装等方面有着广泛的应用。

例如，M8、M12-6H、M16-7H等都是常见的粗牙螺纹。

三、细牙螺纹的特点与应用
细牙螺纹则因其较小的螺距和浅牙型，更适用于需要密封和防松动的场合。

例如，一些精密仪器、阀门等需要密封的设备中，常常使用细牙螺纹。

细牙螺纹的螺旋升角更小，有利于螺纹的自锁，从而提高了连接的稳定性。

四、如何选择合适的螺纹
在实际应用中，选择粗牙螺纹还是细牙螺纹，主要取决于连接件的强度要求、使用环境以及连接件的自锁需求。

如果连接件需要承受较大的拉力和冲击力，且不需要严格的密封，那么粗牙螺纹是比较合适的选择。

而如果连接件需要在较小空间内实现高密封性能，或者有防松动需求，那么细牙螺纹就更为适合。

总之，粗牙螺纹和细牙螺纹在螺距、牙型、应用场合等方面存在明显差异。

60%100%60%100%60%100%60%100%60%100% M1 ×0.250.750.840.73M1 ×0.20.800.870.78W1/16-60 1.20 1.26 1.05Nr.1-64 1.50 1.60 1.42Nr.0-80 1.30 1.32 1.18 M1.1　×0.250.850.940.83M1.1　×0.20.900.970.88W3/32-48 1.80 1.97 1.70Nr.2-56 1.80 1.89 1.69Nr.1-72 1.60 1.62 1.47 M1.2　×0.250.95 1.040.93M1.2　×0.2 1.00 1.070.98W1/8-40 2.60 2.69 2.36Nr.3-48 2.10 2.17 1.94Nr.2-64 1.90 1.93 1.75 M1.4×0.3 1.10 1.21 1.08M1.4　×0.2 1.20 1.27 1.18W5/32-32 3.10 3.36 2.95Nr.4-40 2.30 2.43 2.16Nr.3-56 2.10 2.22 2.02 M1.6　×0.35 1.25 1.37 1.22M1.6　×0.2 1.40 1.47 1.38W3/16-24 3.60 3.95 3.41Nr.5-40 2.60 2.76 2.49Nr.4-48 2.40 2.50 2.27 M1.7　×0.35 1.35 1.47 1.32M1.8　×0.2 1.60 1.67 1.58W7/32-24 4.50 4.74 4.20Nr.6-32 2.75 2.99 2.65Nr.5-44 2.70 2.80 2.55 M1.8　×0.35 1.45 1.57 1.42M2 ×0.25 1.75 1.84 1.73W1/4-20 5.10 5.37 4.72Nr.8-32 3.50 3.65 3.31Nr.6-40 3.00 3.09 2.82 M2　×0.4 1.60 1.74 1.57M2.2　×0.25 1.95 2.07 1.93W5/16-18 6.50 6.85 6.13Nr.10-24 3.80 4.14 3.68Nr.8-36 3.50 3.71 3.40 M2.2　×0.45 1.75 1.91 1.71M2.5　×0.35 2.15 2.27 2.12W3/8-167.908.317.49Nr.12-24 4.50 4.80 4.34Nr.10-32 4.10 4.31 3.97 M2.3　×0.4 1.90 2.04 1.87M3 ×0.35 2.65 2.77 2.62W7/16-149.309.728.791/4-20 5.10 5.53 4.98Nr.12-28 4.70 4.90 4.50 M2.5　×0.45 2.05 2.21 2.01M3.5　×0.35 3.15 3.27 3.12W1/2-1210.5011.079.995/16-18 6.507.02 6.411/4-28 5.50 5.76 5.37 M2.6　×0.45 2.15 2.31 2.11M4 ×0.5 3.50 3.68 3.46W9/16-1212.0012.6611.583/8-167.908.497.815/16-24 6.907.25 6.79 M3 ×0.5 2.50 2.68 2.46M4.5　×0.5 4.00 4.18 3.96W5/8-1113.5014.1012.927/16-149.309.939.153/8-248.508.848.38 M3 ×0.6 2.40 2.61 2.35M5 ×0.5 4.50 4.68 4.46W3/4-1016.5017.1015.801/2-1310.8011.4310.587/16-209.9010.299.74 M3.5　×0.6 2.90 3.11 2.85M5.5　×0.5 5.00 5.18 4.96W7/8-919.2520.0618.619/16-1212.2012.9112.001/2-2011.5011.8811.33 M4 ×0.7 3.30 3.55 3.24M6 ×0.5 5.50 5.68 5.46W1-822.0022.9621.335/8-1113.5014.3813.389/16-1812.9013.3712.76 M4 ×0.75 3.25 3.51 3.19M6 ×0.75 5.25 5.51 5.19W11/8-724.7525.7923.933/4-1016.5017.4016.305/8-1814.5014.9614.35 M4.5　×0.75 3.75 4.01 3.69M7 ×0.75 6.25 6.51 6.19W11/4-727.7528.9627.107/8-919.5020.3919.173/4-1617.5018.0217.33 M5 ×0.8 4.20 4.48 4.13M8 ×0.757.257.517.19W13/8-630.2031.6729.501-822.2523.3421.967/8-1420.2521.0520.26 M5 ×0.9 4.10 4.70 4.66M8 ×1.07.007.35 6.92W11/2-633.5034.8532.6811/4-728.0029.3927.821-1223.2524.0323.11 M6 ×1.0 5.00 5.35 4.92M9 ×1.08.008.357.92W15/8-535.5037.3734.7713/8-631.0032.1830.3411/8-1226.5027.2026.28 M7 ×1.0 6.00 6.35 5.92M10　×0.759.259.519.19W13/4-538.5040.5537.9411/2-634.5035.3533.5211/4-1229.5030.3829.46 M8 ×1.25 6.807.19 6.65M10　×1.09.009.358.92W17/8-4.541.5043.2940.4013/4-539.0041.1538.9513/8-1232.5033.3532.63 M9　×1.257.808.197.65M10　×1.258.759.198.65W2-4.544.5046.4643.572-4.545.0047.1344.6911/2-1236.0036.7335.81 M10 ×1.58.509.038.38M11　×1.010.0010.359.92M11 ×1.59.5010.039.38M12　×0.7511.2511.5111.19M12 ×1.7510.2010.8610.11M12　×1.011.0011.3510.92M14 ×2.012.0012.7011.83M12　×1.2510.7511.1910.65M16　×2.014.0014.7013.83M12　×1.510.5011.0310.38M18 ×2.515.5016.3815.29M14　×1.013.0013.3512.9260%100%60%100%60%100% M20 ×2.517.5018.3817.29M14　×1.2512.7513.1912.65W1/16-60 1.40 1.42 1.32Nr.1-64 1.70 1.73 1.64Nr.0-80 1.40 1.42 1.35 M22 ×2.519.5020.3819.29M14　×1.512.5013.0312.38W3/32-48 2.10 2.18 2.04Nr.2-56 2.00 2.04 1.94Nr.1-72 1.70 1.74 1.66 M24 ×3.021.0022.0520.75M15　×1.014.0014.3513.92W1/8-40 2.85 2.93 2.77Nr.3-48 2.25 2.34 2.23Nr.2-64 2.00 2.06 1.97 M27 ×3.024.0025.0523.75M15　×1.2513.7514.1913.65W5/32-32 3.55 3.66 3.46Nr.4-40 2.55 2.64 2.50Nr.3-56 2.30 2.37 2.27 M30　×3.526.5027.7326.21M15　×1.513.5014.0313.38W3/16-24 4.25 4.36 4.08Nr.5-40 2.90 2.97 2.83Nr.4-48 2.60 2.67 2.56 M33　×3.529.5030.7329.21M16　×1.015.0015.3514.92W7/32-24 5.05 5.15 4.88Nr.6-32 3.15 3.25 3.08Nr.5-44 2.90 2.99 2.86 M36 ×4.032.0033.4031.67M16　×1.2514.7515.1914.65W1/4-20 5.75 5.86 5.54Nr.8-32 3.80 3.91 3.74Nr.6-40 3.20 3.30 3.16 M39 ×4.035.0036.4034.67M16　×1.514.5015.0314.38W5/16-187.307.407.03Nr.10-24 4.35 4.48 4.25Nr.8-36 3.85 3.94 3.78 M42 ×4.537.5039.0837.13M18　×1.017.0017.3516.92W3/8-168.808.928.51Nr.12-24 5.00 5.14 4.91Nr.10-32 4.45 4.57 4.40 M45　×4.540.5042.0840.13M18　×1.2516.7517.1916.65W7/16-1410.3010.429.951/4-20 5.75 5.94 5.66Nr.12-28 5.05 5.19 4.99 M48 ×5.043.0044.7542.59M18　×1.516.5017.0316.38W1/2-1211.7511.8911.345/16-187.307.487.171/4-28 5.95 6.06 5.86 M52 ×5.047.0048.7546×59M18　×2.016.0016.7015.833/8-168.809.018.675/16-247.407.597.36 M56 ×5.550.5052.4350.05M20　×1.019.0019.3518.927/16-1410.3010.5210.133/8-249.009.188.95 M60 ×5.554.5056.4354.05M20　×1.2518.7519.1918.651/2-1311.8012.0711.641/2-2012.1012.2912.01 M64 ×658.0060.1057.50M20　×1.518.5019.0318.38M68 ×662.0064.1061.50M20　×2.018.0018.7017.83PT(Rc)PS(Pp)PF(G)M72　×666.0068.1065.50M22　×1.021.0021.3520.92下孔径下孔径下孔径M76 ×670.0072.1069.50M22　×1.2520.7521.1920.651/16-28 6.30 6.50 6.70英时英时//公 对照表无屑丝攻美制细牙螺纹无屑丝攻美制细牙螺纹((UNFUNF))规格规格规格规格公制粗牙螺纹公制粗牙螺纹((M)下孔径(%)下孔径规格公制细牙螺纹公制细牙螺纹((M)下孔径下孔径(%)无屑丝攻英制粗牙螺纹无屑丝攻英制粗牙螺纹((W)规格规格英制管牙螺纹无屑丝攻美制粗牙螺纹无屑丝攻美制粗牙螺纹((UNCUNC))针车牙螺纹针车牙螺纹((SMSM))英制粗牙螺纹英制粗牙螺纹((W)下孔径下孔径(%)规格美制细牙螺纹美制细牙螺纹((UNFUNF))下孔径下孔径(%)规格螺丝攻下孔径对照表下孔径下孔径(%)下孔径下孔径(%)下孔径下孔径(%)美制粗牙螺纹美制粗牙螺纹((UNCUNC))下孔径下孔径(%)M22　×1.520.5021.0320.381/8-288.308.608.70M22　×2.020.0020.0719.831/4-1911.0011.5011.7060%100%M24　×1.023.0023.3522.923/8-1914.5015.0015.25SM1/16-80 1.30 1.34 1.181/16M24　×1.2522.7523.1922.651/2-1418.1018.5019.00SM5/64-64 1.60 1.68 1.473/32M24　×1.522.5023.0322.385/8-1421.00SM3/32-100 2.15 2.18 2.051/860%100%M24　×2.022.0022.7021.833/4-1423.5024.0024.50SM3/32-56 1.90 2.03 1.795/32M1×0.250.900.920.86M25　×1.024.0024.1923.927/8-1428.00SM1/8-44 2.55 2.73 2.4311/64M1.1×0.25 1.00 1.020.96M25　×1.523.5024.0323.381-1129.6030.2530.50SM1/8-40 2.50 2.68 2.353/16M1.2×0.25 1.10 1.12 1.06M25　×2.023.0023.7022.8311/8-1135.50SM9/64-40 2.90 3.08 2.757.32M1.4×0.3 1.25 1.30 1.24M26　×1.524.5025.0324.3811/4-1138.1039.0039.50SM11/64-40 3.70 3.87 3.5415/64M1.6×0.35 1.45 1.49 1.41M27　×1.026.0026.3525.9211/2-1144.0044.9045.00SM3/16-32 3.95 4.14 3.731/4M1.7×0.35 1.55 1.59 1.51M27　×1.525.5026.0325.3813/4-1151.00SM3/16-28 3.80 4.06 3.589/32M1.8×0.35 1.65 1.69 1.61M27　×2.025.0025.7024.832-1155.6056.6057.00SM7/32-32 4.70 4.94 4.535/16M2×0.4 1.80 1.87 1.78M28　×1.526.5027.0326.38SM15/64-28 5.00 5.25 4.773/8M2.2×0.45 2.00 2.05 1.96M28　×2026.0026.7025.83SM1/4-40 5.70 5.86 5.537/16M2.3×0.4 2.10 2.17 2.08M30　×1.029.0029.3528.92SM1/4-28 5.40 5.64 5.171/2M2.5×0.45 2.30 2.35 2.26M30　×1.528.5029.0328.38SM1/4-24 5.25 5.53 4.989/16M2.6×0.45 2.40 2.45 2.36M30　×2.028.0028.7027.83NPT SM9/32-28 6.20 6.44 5.975/8M3×0.5 2.75 2.84 2.73M32　×1.530.5031.0330.38下孔径SM9/32-20 5.80 6.15 5.4911/16M3.5×0.6 3.20 3.31 3.18M33　×1.531.5032.0331.381/16-27 6.20SM5/16-287.007.23 6.673/4M4×0.7 3.65 3.77 3.62M33　×2.031.0031.7030.831/8-278.50SM5/16-24 6.857.11 6.567/8M4.5×0.75 4.15 4.26 4.09M33　×3.030.0031.5029.751/4-1811.00SM5/16-18 6.50 6.84 6.101M5×0.8 4.60 4.74 4.57M35　×1.533.5034.0333.383/8-1814.50SM3/8-288.558.828.3511/8M6×1.0 5.50 5.68 5.46M36　×1.534.5035.0334.381/2-1418.00SM3/8-188.058.437.6911/4M7×1.0 6.50 6.68 6.46M36　×2.034.0034.7033.833/4-1423.00SM7/16-2810.1510.419.9313/8M8×1.257.357.597.32M36　×3.033.0034.0532.751-111/２29.00SM7/16-169.409.889.0511/2M9×1.258.408.598.32M38　×1.536.5037.0336.3811/4-111/２38.00SM1/2-2811.7511.9911.5215/8M10×1.59.259.519.19M39　×1.537.5038.0337.3811/2-111/２44.00SM1/2-2011.3511.7111.0513/4M12×1.7511.1011.4311.05M39　×2.037.0037.7036.832-111/３56.00SM1/2-1210.4011.059.9517/8M39　×3.036.0037.0535.7521/265.892M40　×1.538.5039.0338.38M40　×2.038.0038.7037.83M40　×3.037.0038.0536.75M42　×1.540.5041.0340.3860%100%M42　×2.040.0040.7039.83Pg7 -2011.4011.6911.08M42　×3.039.0040.0538.75Pg9 -1814.0014.3313.66M42　×4.038.0040.7037.66Pg11 -1817.2517.7317.06M45　×1.543.5044.0343.38Pg13.5　-1819.0019.5318.86M45　×2.043.0043.7042.83Pg16 -1821.2521.6320.96M45　×3.042.0043.0541.75Pg21 -1626×7527.2426.48M45　×4.041.0042.4040.67Pg29 -1635.5035.9435.18M48　×2.046.0046.7045.83Pg36 -1645.5045.9445.18M48　×3.045.0046.0544.75Pg42 -1652.5052.9452.08M48　×4.044.0045.4043.67Pg48 -1657.5058.2457.48M50　×1.548.5049.0348.38M50　×2.048.0048.7047.83M50　×3.047.0048.0546.75M52　×1.550.5051.0350.38M52　×2.050.0050.7049.83M52　×3.049.0050.0548.7567.4622.225025.400028.575050.800047.625041.275044.450038.100034.925031.750014.287515.875017.462519.0500美制管牙螺纹无屑丝攻公制粗牙螺纹无屑丝攻公制粗牙螺纹((M )Pg Pg钢管牙钢管牙规格规格规格下孔径下孔径(%)56.4044.45下孔径下孔径(%)规格下孔径下孔径(%)12.70004.36563.96883.17501.587538.1029.4023.4018.1514.7011.158.756.35下孔径NPS 11.112512.70009.52507.93757.14386.35005.95315.55635厘7厘半1分1分2厘半--1分半1分7厘半2.3813--2分2分2厘半2分半3分3分半4分4分半5分5分半6分7分1吋1吋1分1吋2分1吋3分2吋1吋4分1吋5分1吋6分1吋7分。

常用标准锥度表
锥度 K 1:200 1:100 1:50 1:203 1:30 1:20 1:16 1:15 1:12 1:10 1:8 1:7 1:5 1:3 7:24 锥角 2α 0°17’11” 0°34’23” 1°8’45” 1°8’46” 1°54’35” 2°51’51” 3°34’48” 3°49’6” 4°46’19” 5°43’29” 7°9’10” 8°10’16” 11°25’16” 18°55’29” 16°35’32” 斜角 α 0°8’36” 0°17’11” 0°34’23” 0°8’39” 0°57’17” 1°25’56” 1°47’24” 1°54’33” 2°23’9” 2°51’45” 3°34’35” 4°5’8” 5°42’38” 9°27’44” 8°17’46” 莫氏 0 1 2 1 3 4 5 6 公制 80 100 120 160 200
公制螺纹钻底孔用钻头直径尺寸表
公称直径 d 1 2 3 4 5 6 8 螺距 t 粗牙 0.25 细牙 0.2 粗牙 0.4 细牙 0.25 粗牙 0.5 细牙 0.35 粗牙 0.7 细牙 0.5 粗牙 0.8 细牙 0.5 粗牙 1 细牙 0.75 粗牙 1.25 1 细牙 0.75 粗牙 1.5 1.25 细牙 1 0.75 粗牙 1.74 1.5 细牙 1.25 1 粗牙 2 1.5 细牙 1.25 1 粗牙 2 1.5 细牙 1 粗牙 2.5 2 细牙 1.5 1 粗牙 2.5 2 细牙 1.5 1 粗牙 2.5 2 细牙 1.5 1 钻头直径 公称直径 Φ d 0.75 0.8 24 1.6 1.75 2.5 2.65 27 3.3 3.5 4.2 4.5 30 5 5.2 6.7 7 7.2 33 8.5 8.7 9 9.2 36 10.2 10.5 10.7 11 39 11.9 12.5 12.7 13 42 13.9 14.5 15 15.4 15.9 45 16.5 17 17.4 17.9 18.5 48 19 19.4 19.9 20.5 52 21 螺距 t 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 粗牙 细牙 3 2 1.5 1 3 2 1.5 1 3.5 3 2 1.5 1 3.5 3 2 1.5 4 3 2 1.5 4 3 2 1.5 4.5 4 3 2 1.5 4.5 4 3 2 1.5 5 4 3 2 1.5 5 钻头直径 Φ 20.9 21.9 22.5 23 23.9 24.9 25.5 26 26.3 26.9 27.9 28.5 29 29.3 29.9 30.9 31.5 31.8 32.9 33.9 34.5 34.8 35.9 36.9 37.5 37.3 37.8 38.9 39.9 40.5 40.3 40.9 41.9 42.9 43.5 42.7 43.8 44.9 45.9 48.5 46（＂） 3/16 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1 1 1/8 1 1/4 1 1/2 1 3/4 2 2 1/4 2 1/2 2 3/4 3 3 1/4 3 1/2 3 3/4 4 每寸牙数 n 24 20 18 16 12 11 10 9 8 7 7 6 5 4 1/2 4 4 3 1/2 3 1/2 3 1/4 3 1/4 3 3 外径尺寸 d 4.762 6.35 7.938 9.525 12.7 15.875 19.05 22.225 25.4 28.575 31.75 38.1 44.45 50.8 57.15 63.5 69.85 76.2 82.55 88.9 95.25 101.6

CREO 画螺丝节距参下面内容。

螺纹画一个等腰三角形，角度为60度，要偏移0.05mm 。

最后丝的倒角画是心线，然后画一条直线，45度角，0.5长，360度完成。

同一尺寸的螺纹，粗牙的螺距只有1个，而细牙的螺距可能有许多种。

例如，M10的螺纹，粗牙螺距是1.5；而M10细牙螺纹的螺距，有1.25、1、0.75
是粗细牙螺距对照：螺纹粗牙
细牙
M3
0.5
0.35
M4
0.7
0.5
M5
0.8
0.5
M6
1.0
0.75
M8
1.25
1.0 、0.75
M10
1.5
1.25、1.0、0.75
追问：攻丝以上螺纹需要用多少直径钻头
孔直径=公称直径- 牙距 x 1.1如M10标准牙钻头直径：10-
1.5x1.1= 8.35
追问：那就是这样M8就是8-1.25
x1.1=6.6 25吗
提问者评价 谢了m3/m4/m5 /m6/m8的底孔应该各打多大的？
与你所用的丝锥螺距有关,M3一般常用2.5MM；M4和一般常用
3.3MM; M5一般常用
4.2MM; M6一般常用5MM; M8 一般常用7MM.
径
螺距
钻头直径 m3/ 0.5
2.5
0.35
2.65
m4/ 0.7
3.3
0.5
3.5
m5/ 0.8
4.2
0.5
4.5
m6/
1
5
0.75
5.2
m8/ 1.25
6.7
1
7
0.75
7.2。