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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(jì)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(hào)螺距P/mm牙高h(yuǎn)/mm基面上的直徑有效螺紋長(zhǎng)度/mm基準(zhǔn)長(zhǎng)度有效螺紋長(zhǎng)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(hào)基面上的基本尺寸基準(zhǔn)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(zhǔn)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(shuō)明:1.常用計(jì)算公式:P=25.4/n,h=0.P,r=0.P;2.螺紋字母代號(hào)含義:R---指圓錐外螺紋,RC---指圓錐內(nèi)螺紋,
8、RP---
