1标准公制螺纹基本牙型和公式Word文档下载推荐.docx

1、8.3769.1888.647M121.7512.00010.86310.10611.02610.376M14214.00012.70111.83513.02612.376M1616.00014.70113.83515.02614.376M182.518.00016.37615.294（M18）17.026M2020.00018.37617.29419.026M2222.00020.37619.294（M22）20.70119.835M24324.00022.05120.75222.70121.835M2727.00025.05123.75226.00025.70124.835M303.530

2、.00027.72726.211M2828.00026.70125.835M3333.00030.72729.21128.05126.752M36436.00034.40231.67032.00031.05129.752M3939.00036.40234.67034.05132.752M424.542.00039.07737.12938.00037.05135.752螺纹公称直径d钻头直径d铜不锈钢041602517505250352150733355084142456490755281256667771721015848586876912101102104105106107109111411

3、81241251291316138144145149151815315515816416516917201731751781841851891922193195198204205209212420721822422522923非螺纹密封英制英制锥管螺纹英制锥螺纹螺纹直径牙数钻头直径1/82888271/41171121113/81521471/21831793/42442362323062971152921-1/43923833791-3/84161-1/244143945155856螺距（t）螺纹长度基面上螺纹直径牙型高度（h1）有效长度基面长度外径（d）中径（d2）内径（d1）0.9199

4、.739.158.570.581.3413.1612.311.450.8616.6615.8114.951.817.520.9619.7918.631.169.526.4425.2824.122.3133.2531.7730.291.4841.9140.4338.9547.8146.3344.852659.6258.1456.663018.575.1973.7172.233220.587.8986.4184.933825.5113.03111.56110.08本螺纹基面上各直径等于圆柱螺纹的各相应直径基面上螺纹内径 d1 = d - 1.28t3/4 = 26.44 - 1.28 * 1.81

5、 = 24.12斜角（）14724 锥角 （2tg）=1:公称直径（英寸）每英寸牙数（n）管子外径（d）管接头螺纹内径（d1）名义尺寸最大外径最小外径最大内径最小内径 1/89.689.388.928.67 1/413.112.7411.8411.56 3/816.616.2415.3515.06 1/220.8919.0518.75 5/822.9122.8522.4620.5921.0120.71 3/426.3825.9724.5724.257/830.230.1429.7327.8828.3328.0133.1832.7530.7930.4341.8441.3639.4639.144.

6、3344.2643.7841.3741.8741.5147.7447.2145.4451-3/453.7553.6753.1450.7951.3450.9459.5459.0157.2156.812-1/275.1174.5472.8372.393 87.887.1985.5885.1外径d由公称直径所决定螺纹内径 d1 = d - 1.28t1/160.946.54.067.97.146.394.5710.279.528.771.415.0813.5712.4411.311.1310.56.117.0615.9314.813.58.1321.2219.7718.321.458.6126.57

7、25.1223.6711-1/22.2117.510.1633.2331.4629.691.7710.6741.9940.2238.4548.0546.2944.5211.0760.0958.3356.56牙型高度 h1=0.8t基面上螺纹内径 d1 = d - 1.6t3/8 = 17.06mm d1=17.06 - 1.6 * 1.41 = 14.80公称直径每寸牙数外螺纹外径内螺纹内径选用钻头最大尺寸最小尺寸3/161.064.634.243.563.973.713.71/41.276.26.055.754.915.395.15.15/167.787.627.316.346.866.55

8、6.53/81.599.369.28.97.738.297.977.97/1610.9310.7510.459.069.679.339.31/22.1212.511.910.310.9610.6110.59/1614.0813.8713.4711.8912.5612.212.15/815.6515.4315.0313.2613.9413.613.53/42.5418.8118.5718.1716.1716.9216.5416.47/82.8221.9621.721.219.0319.8219.4519.513.1825.1124.8224.3221.822.6722.27221-1/83.63

9、28.2527.9327.3324.4625.4324.991-1/431.4331.0930.4927.6428.5928.181-3/84.2334.5634.233.630.1331.2330.761-1/237.7337.3636.7633.3134.3833.941-3/444.0243.5942.7938.739.9539.451-7/85.6447.1546.6845.8841.2342.5842.06250.3249.8449.0444.4145.7945.25内螺纹（d）公称直径 3/4=19.05 mm外螺纹（d1） 内径 d-1.28 t 3/4=19.05 -1.28

10、* 2.54=15.79 mm外螺纹（d1） 内径 d-1.134 t 3/4=19.05 -1.134 * 2.54=16.16 mm公称直径 （英寸）螺 距（t）d =d-0.075t-0.0511/161.81417.2815.48.0819.65/815.6913.8218.8416.650.9766.235.241.58712.5310.925.1522.52内螺纹d（公称直径）外螺纹d1=内径=d-1.28t 3/4=19.05-1.28*2.116=16.34内螺纹d1=内径=d-1.134t 3/4=19.05-1.134*2.116=16.653/4=12牙/英寸 t=2.1

11、16标准统一标准螺纹基本牙型和公式公称尺寸粗牙UNC细牙UNF#0-801.5241.3181.1817/16-14-11.1129.9349.149#1-641.8541.5981.4257/16-2010.2879.738#1-721.6261.4732/1-1312.70011.43010.584#2-562.1841.8901.6942/1-2011.87411.326#2-641.9281.7559/16-1214.28812.91311.996#3-482.5152.1721.9419/16-1813.37112.761#3-562.2202.0245/8-1115.87513.3

12、76#4-402.8452.4332.1565/8-1814.95814.348#4-482.5022.2713/4-1019.05017.39916.299#5-403.1752.7642.4873/4-1618.01917.330#5-442.7092.5517/8-922.22520.39119.169#6-323.5052.9902.6477/8-1421.04620.262#6-403.0942.817#8-324.1663.6503.3071-825.40023.33821.963#8-363.7083.4011-1224.02623.109#10-244.8264.1383.68

13、01 1/8-728.57526.21824.648#10-324.3103.9671 1/8-1227.20126.284#12-245.4864.7984.3411 1/4-731.75029.39327.823#12-284.8974.5031 1/4-1230.37629.4591/4-206.3505.5244.9761 3/8-634.92532.17430.3431/4-285.7615.3671 3/8-1233.55132.6345/16-187.9387.0216.4111 1/2-638.10035.34933.51815/16-247.2496.7921 1/2-1236.72635.809