锥柄套管是机械加工中车工用于钻孔的常用工具。多年来在更换或用完钻头时一直使用楔铁将它卸下,一些同志在紧张生产中,常易忽视或丢失这个简小的楔铁,而用其它工具,甚至铁块敲打锥柄。久而久之,锥柄套管和钻头的锥柄变得凹凸不平,致与车床尾座的锥孔接触不良,加之钻削时各表面 Taper shank is a common tool used by machinists for drilling holes. Over the years, wedge iron has been used to remove or remove drill bits. Some comrades often neglect or lose this small wedge iron in intensive production, while tapping the taper with other tools or even iron blocks. As time passes, the taper shank and bit taper shank become rough, resulting in poor contact with the taper hole lathe tailstock, coupled with the surface of the drilling