普通公制螺紋搓滾絲毛坯尺寸及公差的確定

1、普通公制螺紋搓(滾)絲毛坯尺寸及公差的確定普通螺紋計算式：d0min=d2min+0.3Td2 d0max=d2min+0.7Td2 式中：d0min-最小毛坯直徑 d0max-最大毛坯直徑 d2min-最小外螺紋中徑 Td2-外螺紋中徑公差D2=D0.6495×PD1=D1.083×P表一：普通螺紋的基本尺寸(GB/T196-2003) mm公稱直徑(大徑)D、d螺距P中徑D2、d2小徑D1、d1公稱直徑(大徑)D、d螺距P中徑D2、d2小徑D1、d110.250.8380.729221.521.02620.3761.20.251.0380.9292.520.37619.

2、2941.40.31.2051.07524222.70121.8351.60.351.3731.221322.05120.75220.41.7401.56727225.70124.8352.50.452.2082.013325.05123.75230.52.6752.45930228.70127.8353.50.63.1102.8503.527.72726.21140.73.5453.24233231.70130.8354.50.754.0133.6883.530.72729.21150.84.4804.13436334.05132.752615.3504.917433. 40231.6708

3、17.356.91739337.05135.7521.257.1886.647436. 40234.6701019.3508.91742340.05138.7521.259.1888.6474.539.07737.1291.59.0268.37645343.05141.752121.2511.18810.6474.542.07740.1291.511.02610.37648346.05144.7521.7510.86310.106544.75242.587141.513.02612.37652449.40247.670212.70111.835548.75246.587161.515.0261

4、4.37656453.40251.670214.70113.8355.552.42850.046182.516.37615.29460457.40255.670201.519.02618.3765.556.42854.046218.70117.83564461.40259.6702.518.37617.294660.10357.505表二：內外螺紋的基本偏差(GB/T197-2003) m螺距P/mm基本偏差螺距P/mm基本偏差內螺紋D、D2外螺紋d、d2內螺紋D、D2外螺紋d、d2GEIHEIeesfesgeshesGEIHEIeesfesgeshes0.2+170-1701.25+280-

5、63-42-2800.25+180-1801.5+320-67-45-3200.3+180-1801.75+340-71-48-3400.35+190-34-1902+380-71-52-3800.4+190-34-1902.5+420-80-58-4200.45+200-35-2003+480-85-63-4800.5+200-50-36-2003.5+530-90-70-5300.6+210-53-36-2104+600-95-75-6000.7+220-56-38-2204.5+630-100-80-6300.75+220-56-38-2205+710-106-85-7100.8+240

6、-60-38-2405.5+750-112-90-7501+260-60-40-2606+800-118-95-800表三：內螺紋小徑公差(GB/T197-2003) m螺距P/mm公差等級螺距P/mm公差等級45678456780.238481.251702122653354250.254556711.51902363003754750.35367851.752122653354255300.35638010022363003754756000.471901122.52803554505607100.458010012533154005006308000.5901121401803.5355

7、4505607109000.610012516020043754756007509500.71121401802244.542553067085010600.75118150190236545056071090011200.81251602002503155.547560075095011801150190236300375650063080010001250表四：外螺紋大徑公差(GB/T197-2003) m螺距P/mm公差等級螺距P/mm公差等級螺距P/mm公差等級4684684680.236560.7901402.52123355300.2542670.75901403236375600

8、0.348750.8951502363.52654256700.355385111218028043004757500.460951.251322123354.53155008000.45631001.515023637553355308500.5671061.751702654255.53555609000.68012521802804506375600950表五：內螺紋中徑公差(GB/T197-2003) m公稱直徑D/mm螺距P/mm公差等級公稱直徑D/mm螺距P/mm公差等級45678456780.991.40.24011.222.41.251121401802242800.25455

9、61.51181501902363000.34860751.751251602002503151.42.80.24221321702122653350.2548602.51401802242803550.3553678522.44511061321702120.45671901.51251602002503150.4560759521401802242803552.85.60.3556719031702122653354250.563801001253.51802242803554500.6719011214041902363003754750.775951181504.52002503154

10、005000.75759511815045901.51321702122653350.88010012516020021501902363003755.611.20.7585100132170318022428035545019511815019023642002503154005001.2510012516020025052122653354255301.51121401802242805.522428035545056011.222.411001251602002506236300375475600表六：外螺紋中徑公差(GB/T197-2003) m公稱直徑D/mm螺距P/mm公差等級公稱

11、直徑D/mm螺距P/mm公差等級345678934567890.991.40.22430384811.222.41.2567851061321702122650.25263442531.571901121401802242800.3283645561.7575951181501902363001.42.80.2253240502801001251602002503150.25283645562.5851061321702122653350.35324050638022.445163801001251602002500.434425367851.575951181501902363000.453

12、6455671902851061321702122653352.85.60.35344253678531001251602002503154000.538486075953.51061321702122653354250.64253678510641121401802242803554500.7455671901124.51181501902363003754750.754556719011245901.5801001251602002503150.8486075951181501902901121401802242803555.611.20.755063801001253106132170212