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1、表一:圓柱管螺紋(部分螺紋)基本尺寸表(摘自GB/T7307-1987)管螺紋(G)常用計算公式:P=25.4/nh=0.PH=0.Pr=0.P.其中:H----指理想的牙型高度;r----指螺紋圓角半徑,牙型角55°編制/日期:唐繼軍05.10.15審核/日期:表二:圓錐管螺紋的基本尺寸(摘自GB/T7306-1987)螺紋代號螺距P/mm牙高h/mm基面上的直徑有效螺紋長度/mm基準長度有效螺紋長度外螺紋基面尺寸公差小頭中徑加工尺寸及公差大徑d=D/mm中徑d2=D2/mm小徑d1=D1/mm基本/mm最大/mm最小/mm基本/mm最大/mm最小/mm大徑公差
2、Td基面中徑公差Td2下偏差/mm上偏差/mm下偏差/mm上偏差/mm1/16"-280.9070.5817.7237.1426.5616.54.04.93.16.57.45.6-0.2140-0.21406.78±0.021/8"-280.9070.5819.7289.1478.5666.54.04.93.16.57.45.6-0.2140-0.21408.78±0.021/4"-191.3370.87613.15712.30111.4459.76.07.34.79.711.08.4-0.2500-0.250011.85±0.023/8"-191.3370.87
3、616.66215.80614.95010.16.47.75.110.111.48.8-0.2500-0.250015.30±0.021/2"-141.8141.16220.95519.79318.63113.28.210.06.413.215.011.4-0.2840-0.284019.18±0.023/4"-141.8141.16226.44125.27924.11714.59.511.37.714.516.312.7-0.2840-0.284024.60±0.031"-112.3091.47933.24931.77030.29116.810.412.78.1
4、16.819.114.5-0.3600-0.360030.98±0.031-1/4"-112.3091.47941.91040.43138.95219.112.715.010.419.121.416.8-0.3600-0.360039.50±0.021-1/2"-112.3091.47947.80346.32444.84519.112.715.010.419.121.416.8-0.3600-0.360045.20±0.04螺紋代號基面上的基本尺寸基準距離L1裝配余量L3外螺紋基面尺寸公差/mm小頭中徑加工尺寸及公差大徑(基準直徑)d=D/mm中徑d2=D2/mm
5、小徑d1=D1/mm大徑公差Td基面中徑公差Td2/mm牙數(shù)/mm牙數(shù)下偏差上偏差下偏差上偏差1/16"-277.8957.1426.3894.0644.322.8223-0.2140-0.21406.77±0.021/8"-2710.2429.4898.7364.1024.362.8223-0.2140-0.21409.10±0.021/4"-1813.61612.48711.3585.7864.104.2343-0.2500-0.250012.00±0.023/8"-1817.05515.92614.7976.0964.324.2343-0.2500-0.25
6、0015.40±0.021/2"-1421.22319.77218.3218.1284.485.4433-0.2840-0.284019.10±0.0253/4"-1426.56825.11723.6668.6114.755.4433-0.2840-0.284024.40±0.0251"-11.533.22831.46129.69410.1604.606.6273-0.3600-0.360030.60±0.031-1/4"-11.541.98540.21838.45110.6684.836.6273-0.3600-0.360039.30±0.031-1/2"-11
7、.548.05446.28744.52010.6684.836.6273-0.3600-0.360045.35±0.042"-112.3091.47959.61458.13556.65623.415.918.213.623.425.721.1-0.3600-0.3600挑絲2-1/2"-112.3091.47975.18473.70572.22626.717.521.014.026.730.223.2-0.4340-0.4340挑絲說明:1.常用計算公式:P=25.4/n,h=0.P,r=0.P;2.螺紋字母代號含義:R---指圓錐外螺紋,RC---指圓錐內(nèi)螺紋,
8、RP---
