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1、螺纹规格普通切削丝锥挤牙丝锥(非圆丝锥)钻头直径孔径钻头直径孔径(一级螺纹)孔径(二级螺纹)M10.250.750.7290.785M1.40.31.11.0751.1421.2441.2631.2701.294M1.70.351.351.3211.4211.511.541.541.58M20.41.61.5671.6791.781.821.811.85M2.30.41.91.8671.9792.082.122.112.15M2.50.452.12.0132.1382.252.392.282.43M30.52.42.2802.4402.48-2.592.742.782.762.81M3.50.
2、62.92.8503.0103.183.213.203.26M40.73.253.1063.3263.633.673.653.70M40.753.33.2423.422M50.94.13.9304.170M50.84.24.1344.3344.574.624.594.66M6154.9175.1535.455.515.485.57M7165.9176.1536.456.516.486.57M81.256.86.6476.9127.317.387.347.41M8176.9177.1537.457.517.487.57M101.58.58.3768.6769.169.229.189.28M101
3、.258.88.6478.9129.319.389.349.41M10198.9179.1539.469.529.489.57M121.7510.310.10610.44111.0111.0811.0511.15M121.510.510.37610.67611.1611.2211.1811.28M121.2510.810.64710.91211.3111.3811.3411.41M1211110.91711.15311.4611.5211.4811.57M1421211.83512.21012.8312.9512.9213.04M141.512.512.37612.67613.1613.221
4、3.2113.30M1621413.83514.21014.8714.9514.9215.04M161.514.514.37614.67615.1615.2215.2115.30M182.515.515.29415.74416.5716.6716.6316.78M181.516.516.37616.67617.1717.2317.2217.31M202.517.517.29417.74418.5718.6718.6318.78M201.518.518.37618.67619.1719.2319.2219.31M222.519.519.29419.744一.切削丝锥攻牙螺纹底径简易计算公式:外径
5、-(牙距0.850.95)=螺纹底径;例M61.0M6-(1.00.85)=5.15(最大孔径)M6-(1.00.95)=5.05(最小孔径)二.挤牙丝锥螺纹攻牙底径简易计算公式:外径-(牙距0.4250.475)=螺纹底径;例M61.0M6-(1.00.425)=5.575(最大孔径)M6-(1.00.475)=5.525(最小孔径)M2432120.75221.252M2732423.75224.252M303.526.526.21126.771M3643231.67032.270三.切削速度简易计算公式:切削回转速=(S+L)500 D例:螺纹丝攻为HSS,被切削材料为低碳钢.切削速度为S,8m/minL,14m/min EX-SFT M61.0M424.537.537.12937.799M454.540.540.12940.799M4854342.58743.297切削速度=(8+14)500 63.1416=1100018.85=583RPM
