螺纹毛坯直径与钻头直径选用表公称螺距P 直径D11.21.41.61.81*1.2*22.21.4*1.6*1.8*2.533.52*2.2*2.5*3*4568100.2螺孔毛坯直径 D 1基本尺寸0.790.991.191.391.442.142.643.141.581.732.032.483.484.485.487.489.48 极限偏差5H6H7H__钻头直径d20.81.01.21.41.60.750.951.751.951.101.251.452.152.653.151.601.752.0510121416182022242730335*0.755.227.229.2211.2213.2215.2217.2219.2221.2223.2226.2229.2232.224.17公称直径D1214161820223.5*4* 螺距P螺孔毛坯直径D'基本尺寸11.4813.4815.4817.4819.482.883.27 极限偏差 5H+0.0906H+0.1207H+0.160 钻头直径 d211.5013.5015.5017.5019.5021.50 公称直径D6*7*8101214161820222427303336394245485256606468727680螺距 P 螺孔毛坯 直径D基本尺寸4.965.966.968.9610.9612.9614.9616.9618.9620.9622.9625.9628.9631.9634.9637.9640.9643.9646.9650.9654.9658.9662.9666.9670.9674.9678.96 极限偏差 5H+0.1506H+0.1907H+0.260 钻头直径 d25.006.007.009.0011.0013.0015.0017.0019.0021.0023.0026.0029.0032.0035.0038.0041.0044.0047.00 +0.04___0+0.04+0.06000.50.25__0.60.6+0.10+0.13+0.172.90000+0.11+0.15+0.193.30000+0.120+0.120+0.2005.207.209.2011.2013.2015.200.30.35+0.05+0.0700+0.060+0.080__10.40.450.5+0.07+0.1000+0.08+0.1000+0.090+0.120__+0.1600.8+0.13+0.17+0.224.20000公称螺距P直径D 8* 9*1012 10* 11*12141618202224273033363942454852566064687276801.251.5螺孔毛坯直径D 1基本尺寸6.7014.4416.4418.4420.4422.44.25.4428.4431.4434.4437.4440.4443.4446.4450.4454.4458.4462.4466.4470.4474.4478.44 极限偏差5H+0.150+0.1706H+0.200+0.2307H+0.27 0+0.31 0 钻头 直径 d26.77.78.710.78.59.510.512.514.516.518.520.522.525.528.531.534.537.540.543.546.5公称直径D85909510010511011512012513013514014515012*14*16182022 2427303336394245 螺距P螺孔毛坯直径D'基本尺寸83.4488.4493.4498.44103.44108.44113.44118.44123.44128.44133.44138.44143.44148.4410.1711.9013.9015.9017.9019.9021.9024.9027.9030.9033.9036.9039.9042.90 极限偏差 5H+0.1706H+0.2307H+0.310 钻头直径 d2 公_ 称直径D48525660646872768085909510010511011512012513013514014515018*20*22*2 4*27*3033螺距P2螺孔毛坯直径D'基本尺寸45.949.953.957.961.965.969.973.977.982.987.992.997.9102.9107.9112.9117.9122.9127.9132.9137.9142.9147.9 极限偏差 5H+0.2406H+0.3007H+0.400 钻头直径 d246.050.01.51.752+0.19+0.27+0.3510.2000+0.240+0.300+0.40012.014.016.018.020.022.025.028.031.034.037.040.043.02.5315.3715.417.37+0.28+0.38+0.4917.419.3700019.420.8323.83+0.32+0.42+0.5526.8300029.8320.923.926.929.9 公称螺距P直径D363942454852566064687276808590951001051101151201251301351401451503螺孔毛坯直径D 1基本尺寸32.8335.8338.8341.8344.8348.8352.8356.8360.8364.8368.8372.8376.8381.8386.8391.8396.83101.83106.83111.83116.83121.83126.83131.83136.83141.83146.8326.3029.30 极限偏差直径d232.935.938.941.944.948.9__公称直径D36*39*42*45*48*52*56*60*64*68*螺距P螺孔毛坯直径D'基本尺寸31.7634.7637.2340.2342.6946.6950.1654.1657.6261.62极限偏差5H6H7H钻头直径d2 粗牙螺纹汇总M1X0.25M1.2X0.25M1.4X0.3M1.6X0.35M1.8X0.35M2X0.4M2.2X0.45M2.5X0.45M3X0.5M3.5X0.6M4X0.7M5X0.8M6X1M7X1M8X1.25M9X1.25M10X1.5M11X1.5M12X1.75M14X2M16X24+0.38+0.51+0.6631.800034.8+0.43+0.57+0.7537.300040.3+0.45+0.6 0+0.7942.800046.8+0.48+0.63+0.83__000__+0.51+0.68+0.88__000__4.555.56使用说明M18X2.5M20X2.5M22X2.5M24X3M27X3M30X3.5M33X3.5M36X4M39X4M42X4 .5M45X4.5M48X5M52X5M56X5.5M60X5.5M64X6M68X630*3.533*+0.37+0.48+0.6326.300029.31．表中注有 “ *表”示粗牙螺纹，一般粗牙螺纹在图纸上不标注螺 距。
如用钻模钻孔时，可选用比表中数值大 0.1mm 的钻头2．表中所列钻头，适用于中等扩张的一般螺孔加工如扩张量小，可选比表中数值稍大的钻头如扩张量大，可选比表中数值稍小的钻头 3．加工韧性金属材料的螺孔（不 锈钢、耐热合金钢、低碳钢等），钻头直径可选比表中数值大0.05~0.10mm 的钻头4．表中公差带 6H 的极限偏差也适用于公差带 5G表中公差尺寸符合 GB197-81的规定苏州XXXXXXXX有限公司2005.11.15。