(完整版)螺纹收尾、肩距、退刀槽、倒角.doc

螺纹收尾、肩距、退刀槽、倒角（GB3-79）mm普通螺纹0.531.250.71.5211.51d-0.80.511.53421.50.754.51.912.2531.52.25d-1.20.61.52.33.86320.85212.43.21.62.4d-1.30.81.62.446.41672.51.2534231.5d-1.61235842.51.2583.21.6452.53.75d-21.22.53.8610531.5103.81.94.5634.52.5d-2.31.534.571261.75124.32.25.373.55.252.5d-2.6d-323.55.2914742141652.568463.5461016852.51820226.33.27.51057.5d-3.6d-4.42.557.51218106324277.53.8912694.56914221273.5303394.510.514710.5d-5d-5.73710.516261694363910512168125.581218261694.54245115.513.518913.56d-6.4d-74913.5212918105485212.56.3152010156.51015233220115.5566014716.5221117.57.5d-7.7d-8.351116.52535221266468157.5182412188121828382414单头梯形外螺纹与内螺纹Pb=b1d2d3r=r1c=c1Pb=b1d2d3r=r1c=c122.5d-3d+111.51012.5d-12d+235.534d-421215d-146.545d-5.1d+1.11.52.51620d-19.2d+3.24956.5d-6.6d+1.632024d-23.5d+3.551167.5d-7.8d+1.823.52430d-27.5d+3.5513810d-9.82.54.53240d-36d+45.517注：外螺纹倒角和退刀槽过渡角一般按45°，也可按60°或30°；当螺纹按60°或30°倒角时，倒角深度约等于螺纹深度；内螺纹倒角一般是120°锥角，也可以是90°锥角。