公制螺纹钻底孔用钻头直径尺寸表公称直径d1234568螺距t粗牙0.25细牙0.2粗牙0.4细牙0.25粗牙0.5细牙0.35粗牙0.7细牙0.5粗牙0.8细牙0.5粗牙1细牙0.75粗牙1.251细牙0.75粗牙1.51.25细牙10.75粗牙1.741.5细牙1.251粗牙21.5细牙1.251粗牙21.5细牙1粗牙2.52细牙1.51粗牙2.52细牙1.51粗牙2.52细牙1.51钻头直径公称直径Φd0.750.8241.61.752.52.65273.33..24.53055.26.777.2338.58.799.23610.210.510.7113911.912.512.7134213.914.51515.415.94516.51717.417.918.81919.419.920.55221螺距t粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙粗牙细牙321.51321.513.5321.513.5321.321.321..321..321.5321.55钻头直径Φ20.921.922.52323.924.925.52626.326.927.928.52929.329.930.931.531.832.933.934.534.835.936.937.537.337.838.939.940.0.340.941.942.943.2.743.844.945.948.6.7从略英制螺纹钻底孔用钻头直径尺寸表公称直径（＂）3/161/45/163/87/161/29/165/83/47/811 1/81 1/41 1/21 3/81 3/41 7/82每寸牙数n242018161412121110987765 1/24 1/2钻头直径Φ铸铁钢青铜黄铜3.73.755.16.46.57.87.99.19.310.410.51212.113.313.516.316.419.11921.92224.624.727.827.933.433.535.735.838.93941.441.4.4.7英制螺纹外径尺寸表公称直径（＂）3/161/45/163/81/25/83/47/811 1/81 1/41 1/21 3/422 1/42 1/22 3/433 1/43 1/23 3/44每寸牙数n2420181612111098776 1/2443 1/23 1/23 1/43 1/433外径尺寸d4.7626.357.93.52512.715.87519.0522.22525.428.57531.7538.144.4550.857.1563.569.8576.282.5588.995.25101.6圆柱管螺纹外径尺寸表公称直径每寸牙数（＂）n1/8281/4193/8191/2145/8143/4147/8141111 1/8111 1/4111 3/8111 1/2111 3/4112112 1/4112 1/2112 3/4113113 1/211411511611外径尺寸d9.72913.15816.66320.95622.91226.44230.20233.2537.841.91244.327.80553.74859.61665.71275.18781.53783.887100.334113.034138.435163.8361012管螺纹钻底孔用钻头直径尺寸表公称直径（＂）1/81/43/81/25/83/47/811 1/81 1/41 3/81 1/21 3/42每寸牙数钻头直径nΦ288.81911.71915.21418.91420.81424.31428.11130.51135.21139.21141.61145.111511157常用标准锥度表锥度K1:2001:1001:501:2031:301:201:161:151:121:101:81:71:51:37:24锥角2α0°17’11”0°34’23”1°8’45”1°8’46”1°’35”2°51’51”3°34’48”3°49’6”4°46’19”5°43’29”7°9’10”8°10’16”11°25’16”18°55’29”16°35’32”斜角α0°8’36”0°17’11”0°34’23”0°8’39”0°57’17”1°25’56”1°47’24”1°’33”2°23’9”2°51’45”3°34’35”4°5’8”5°42’38”9°27’44”8°17’46”莫氏01213456公制80100120160200常用工具锥度表大头尺寸D9.04512.06517.7801:20323.52831.26744.39963.34头尺寸D80100120160200锥度v1:19.2121:20.0471:20.0201:20.0491:19.9221:19.21:19.0021:19.180锥度v1:201:201:201:201:20斜角α1°29’27”1°25’43”1°25’50”0°8’39”1°26’18”1°29’15”1°30’26”1°29’36”斜角α1°25’56”1°25’56”1°25’56”1°25’56”1°25’56”1416182022摘自《机械零件手册》
