螺丝攻牙孔径对照表

螺丝攻牙钻孔径对照表

美制（粗）挤牙丝攻钻孔径

规格精度maxmin2-56UNCRH42.021.963-48RH42.322.254-40RH52.602.525-40RH52.932.866-32RH53.173.098-32RH63.833.7510-24RH64.354.2612-24RH65.014.921/4-20RH65.765.665/16-18RH77.297.183/8-16RH78.788.667/16-14RH710.2510.111/2-13RH811.7811.629/16-12RH1013.2713.145/8-11RH1114.7614.623/4-10RH1217.8817.677/8-9RH1220.8520.681-8

RH13

23.84

23.65

美制（细）挤牙丝攻钻孔径

规格精度max

min2-64UNFRH32.041.983-56RH42.352.294-48RH42.642.575-44RH42.952.886-40RH53.263.198-36RH53.883.8010-32RH54.484.4112-28RH55.085.001/4-28RH55.935.865/16-24RH67.467.383/8-24RH69.058.967/16-20RH710.5410.441/2-20RH712.1212.029/16-18RH913.6613.555/8-18RH915.2515.143/4-16RH1018.3218.227/8-14RH1121.3821.271-12RH12

24.4124.28

山数节距换算表

山数

山数

每25.4mm牙距mm每25.4mm牙距mm1000.2540122.1167800.3175112.3091720.3528102.5400640.396992.8222600.423383.1750560.453673.6286480.529264.2333440.577355.0800400.63504 1/25.6444360.705646.3500320.79383 1/27.2571280.90713 1/47.8154241.058338.4667201.27002 7/88.8348181.41112 3/49.2364161.58752 5/89.6762141.81432 1/2

10.1600

13

1.9538

公制挤牙丝攻钻孔径

规格精度maxminM1.0 0.25RH40.920.90M1.1 0.25RH41.021.00M1.2 0.25RH41.121.10M1.4 0.30RH41.2941.270M1.6 0.35RH41.451.40M1.7 0.35RH41.581.54M2.0 0.40RH41.851.81M2.3 0.40RH42.152.11M2.5 0.45RH42.332.28M2.6 0.45RH42.432.38M3.0 0.50RH52.812.76M3.5 0.60RH53.263.20M4.0 0.70RH63.703.65M5.0 0.80RH64.664.59M6.0 1.00RH75.575.48M7.0 1.00RH76.576.48M8.0 1.00RH77.577.48M8.0 1.25RH77.417.34M10 1.00RH79.579.48M10 1.25RH79.419.34M10 1.50RH79.289.18M12 1.00RH711.5711.18M12 1.25RH711.4111.05M12 1.50RH711.2811.48M12 1.75RH811.1511.34M14 1.50RH913.3013.21M14 2.00RH1013.0412.92M16 1.50RH915.3015.21M16 2.00RH1015.0414.92M18 1.5RH1017.3117.22M18 2.5RH1116.7816.63M20 1.5RH1019.3119.22M20 2.5

RH11

18.78

18.63

NRT下孔径计算式

1. 外径-牙距¡0.45=下孔＜D-P¡0.45＞2. Dn=D-0.2P-0.00403?P?f1+0.0127?n

＜例＞M3¡0.5RH6 2级母螺纹攻牙 咬合率90%Dn=3-0.2¡0.5-0.00403¡0.5¡90+0.0127¡6 =2.80

Dn=下孔径 D=基准外径 P=牙距f1=咬合率 n=RH精度

美制螺丝外径公厘（mm）换算表

规格吋

mm No. 0

0.06001.52410.07301.85420.08602.18430.09902.51540.11202.84550.12503.17560.13803.50580.16404.166100.19004.82612

0.2160

5.486

美制细牙螺纹

规格

标准径

2级牙钻孔径最大最小螺丝牙外径

No.0-80（1.524）1.251.3051.182No.1-72（1.854）1.551.6121.474No.2-64（2.184）1.851.9121.756No.3-56（2.515）2.102.1972.025No.4-48（2.845）2.402.4582.271No.5-44（3.175）2.702.7402.551No.6-40（3.505）2.903.0222.820No.8-36（4.166）3.503.6063.404No.10-32（4.826）4.104.1653.963No.12-28（5.486）4.604.7244.4961/4-285.505.5885.3605/16-246.907.0356.7823/8-248.508.6368.3827/16-209.9010.0339.7291/2-2011.5011.60711.3299/16-1812.9013.08112.7515/8-1814.5014.68114.3513/4-1617.5017.67817.3237/8-1420.5020.67520.2701-12

23.3023.57123.1141-1/8-1226.5026.74626.2891-1/4-1229.6029.92129.4641-3/8-1232.8033.09632.6391-1/2-12

36.00

36.271

35.814

美制粗牙螺纹

规格

标准径

2级牙钻孔径最大最小螺丝牙外径

No.1-64（1.854）1.551.5821.425No.2-56（2.184）1.801.8711.695No.3-48（2.515）2.102.1461.941No.4-40（2.845）2.302.3852.157No.5-40（3.175）2.602.6972.487No.6-32（3.505）2.802.8952.642No.8-32（4.166）3.403.5303.302No.10-24（4.826）3.903.9623.683No.12-24（5.486）4.504.5974.3441/4-205.105.2574.9795/16-186.606.7316.4013/8-168.008.1537.7987/16-149.409.5509.1441/2-1310.9011.02310.5929/16-1212.2012.46611.9895/8-1113.6013.86813.3863/4-1016.6016.84016.3077/8-919.6019.76119.1771-8

22.3022.60621.9711-1/8-725.0025.34924.6381-1/4-728.2028.52427.8131-3/8-630.8031.11530.3531-1/2-634.0034.29033.5281-3/4-539.5039.82738.9642-4-1/2

45.20

45.593

44.679

公制粗牙螺纹

规格标准径2级牙钻孔径最大最小M1.0 0.250.750.7850.729M1.1 0.250.850.8850.829M1.2 0.250.950.9850.929M1.4 0.301.101.1421.075M1.6 0.351.251.3211.221M1.7 0.351.351.4211.321M1.8 0.351.451.5211.421M2.0 0.401.601.6791.567M2.2 0.451.751.8381.713M2.3 0.401.901.9791.867M2.5 0.452.102.1382.013M2.6 0.452.202.2382.113M3.0 0.502.502.5992.459M3.5 0.602.903.0102.850M4.0 0.703.303.4223.242M4.5 0.753.803.8783.688M5.0 0.804.204.3344.134M6.0 1.005.005.1534.917M7.0 1.006.006.1535.917M8.0 1.256.806.9126.647M9.0 1.257.807.9127.647M10.0 1.508.508.6768.376M11.0 1.509.509.6769.376M12.0 1.7510.3010.44110.106M14.0 2.0012.0012.21011.835M16.0 2.0014.0014.21013.835M18.0 2.5015.5015.74415.294M20.0 2.5017.5017.74417.294M22.0 2.5019.5019.74419.294M24.0 3.0021.0021.25220.752M27.0 3.0024.0024.25223.752M30.0 3.5026.5026.77126.211M33.0 3.5029.5029.77129.211M36.0 4.0032.0032.27031.670M39.0 4.00

35.00

35.27034.670

公制细牙螺纹

规格标准径2级牙钻孔径最大最小M1.0 0.200.800.8210.783M1.1 0.200.900.9210.883M1.2 0.201.001.0210.983M1.4 0.201.201.2211.183M1.6 0.201.401.4211.383M1.7 0.201.501.5211.483M1.8 0.201.601.6211.583M2.0 0.251.751.7851.729M2.2 0.251.951.9851.929M2.3 0.252.052.0612.001M2.5 0.352.202.2212.121M2.6 0.352.202.2462.186M3.0 0.352.702.7212.621M3.5 0.353.203.2213.121M4.0 0.403.503.5993.459M4.5 0.404.004.0993.959M5.0 0.404.504.5994.459M5.5 0.405.005.0994.959M6.0 0.755.305.3785.188M6.0 0.505.505.5505.400M7.0 0.75

6.30

6.378

6.188

公制细牙螺纹

规格标准径2级牙钻孔径最大最小M7.0 0.50

6.506.5506.400M8.0 1.007.007.1536.917M8.0 0.757.307.3787.188M8.0 0.507.507.5207.400M9.0 1.008.008.1537.917M9.0 0.758.308.3788.188M10.0 1.258.808.9128.647M10.0 1.009.009.1538.917M10.0 0.759.309.3789.188M10.0 0.509.509.5209.400M11.0 1.0010.0010.1539.917M11.0 0.7510.3010.37810.188M12.0 1.5010.5010.67610.376M12.0 1.2510.8010.91210.647M12.0 1.0011.0011.15310.917M12.0 0.5011.5011.52011.400M14.0 1.5012.5012.67612.376M14.0 1.0013.0013.15312.917M15.0 1.5013.5013.67613.376M15.0 1.0014.0014.15313.917M16 …… 此处隐藏：4359字，全部文档内容请下载后查看。喜欢就下载吧 ……