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钻、镗组合刀具是将钻孔、扩孔和精镗孔等多道工序综合起来一次完成。它具有较高的生产效率和加工精度。从板钻头、半精镗刀到可调浮动精镗刀都是具有径向对称两刃的刀具。切削平稳,加工的孔无锥度、无椭圆度,孔的精度可达2级以上,表面光洁度可达▽7。钻、镗组合刀具可用于钻床、铣床、镗床、车床和组合机床上,我厂加工直径为42～80毫米的孔时,大部分采用这种刀具。
Drilling, boring tool is a combination of drilling, reaming and precision boring and other processes together to complete. It has high production efficiency and processing accuracy. From the drill plate, semi-fine boring knife to adjustable floating fine boring knife is a radial symmetrical two-edged tool. Cutting smooth, processing holes without taper, no ovality, hole accuracy up to 2 or more, the surface finish up to ▽ 7. Drilling, boring combination of tools can be used for drilling, milling machines, boring machine, lathe and combined machine tools, I plant processing diameter of 42 to 80 mm hole, the majority of this tool.