圆柱管螺纹(部分螺纹)基本尺寸表.doc

《圆柱管螺纹(部分螺纹)基本尺寸表.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、表一:圆柱管螺纹(部分螺纹)基本尺寸表(摘自GB/T7307-1987)管螺纹(G)常用计算公式:P=25.4/nh=0.PH=0.Pr=0.P.其中:H----指理想的牙型高度;r----指螺纹圆角半径,牙型角55°编制/日期:唐继军05.10.15审核/日期:表二:圆锥管螺纹的基本尺寸(摘自GB/T7306-1987)螺纹代号螺距P/mm牙高h/mm基面上的直径有效螺纹长度/mm基准长度有效螺纹长度外螺纹基面尺寸公差小头中径加工尺寸及公差大径d=D/mm中径d2=D2/mm小径d1=D1/mm基本/mm最大/mm最小/mm基本/mm最大/mm最小/mm大径公差

2、Td基面中径公差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螺纹代号基面上的基本尺寸基准距离L1装配余量L3外螺纹基面尺寸公差/mm小头中径加工尺寸及公差大径(基准直径)d=D/mm中径d2=D2/mm

5、小径d1=D1/mm大径公差Td基面中径公差Td2/mm牙数/mm牙数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挑丝2-1/2"-112.3091.47975.18473.70572.22626.717.521.014.026.730.223.2-0.4340-0.4340挑丝说明:1.常用计算公式:P=25.4/n,h=0.P,r=0.P;2.螺纹字母代号含义:R---指圆锥外螺纹,RC---指圆锥内螺纹,

8、RP---