55°锥管螺纹参数

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1、5.3.255°圆锥管螺纹（节选自GB/T7307-2001）5.3.2.155°圆锥管螺纹的牙型与结构55°圆锥管螺纹的基本牙型与结构大致与60°圆锥管螺纹相似，只是其牙型角为为55°。如图5.3.2.1所示，且其尺寸关系满足下述公式：P=25.4/n；H=0.960491P；h=0.640327P；r=0.137329P；H/6=0.160082P;D2=d2=d-0.640327P;D1=d1=d-1.280654P具体数值见表5.3.2.1。图5.3.2.155°圆锥管螺纹的基本牙型5.3.2.

2、圆锥管螺纹的基本尺寸尺寸代号每25.4mm内的牙数n螺距P/mm牙高H/mm圆弧半径R/mm基面上的直径有效螺纹长度/mm基准长度圆锥内螺纹基面轴向位移的极限偏差T装配余量有效螺纹长度大径d=D/mm中径d2=D2/mm小径d1=D1/mm基本/mm极限偏差T最大/mm最小/mm/mm圈数基本/mm最大/mm最小/mm/mm圈数/mm圈数1/16280.9070.5810.1257.7237.1426.5616.54.00.914.93.11.112.526.57.45.61/8280.9070.581

3、0.1259.7289.1478.5666.54.00.914.93.11.112.526.57.45.61/4191.3370.8760.18413.15712.30111.4459.76.01.317.34.71.713.729.711.08.43/8191.3370.8560.18416.66215.80314.95010.16.41.317.75.11.713.7210.111.48.81/2141.8141.1620.24920.95519.79318.63113.28.21.8110.06.

4、42.315.0213.215.011.43/4141.8141.1620.24926.44125.27924.11714.59.51.8111.37.72.315.0214.516.312.71112.3091.4790.31733.24931.77930.29116.810.42.3112.78.12.916.4216.819.114.51112.3091.4790.31741.91040.43138.95219.112.72.3115.010.42.916.4219.121.416.81112.3

5、091.4790.31747.80346.32444.84519.112.72.31115.010.42.916.4219.121.416.82112.3091.4790.31759.61458.13556.65623.415.92.3118.213.62.917.5323.425.721.12112.3091.4790.31775.18473.70572.22626.717.53.5121.014.03.519.2426.730.223.23112.3091.4790.31787.88486.4058

6、4.92629.820.63.5124.117.13.519.2429.833.326.33112.3091.4790.317100.33098.85197.37231.422.23.5125.718.73.519.2429.833.326.34112.3091.4790.317113.030111.551110.07235.825.43.5128.921.93.5110.4435.839.332.35112.3091.4790.317138.43136.951135.47240.128.63.5132

7、.125.13.5111.5540.143.636.66112.3091.4790.317163.830162.351160.87240.128.63.5132.125.13.5111.5540.143.636.6注：1.本表使用与圆锥外螺纹与圆锥内螺纹和圆柱内螺纹两种连接方式。2.当内螺纹的结构无螺尾时（空刀槽），有效长度不应小于表中最小值的0.8倍。3.与圆锥外螺纹配合的圆柱内螺纹，其各直径的极限偏差均为圆锥内螺纹基面轴向位移的1/16.