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目前,绝大部分钻孔刀具(少量特殊用途的例外)是用高速钢制成,如麻花钻。高速钢麻花钻在技术上是成功的,且长期以来得到广泛应用。但是,这种刀具的切削速度受到很大限制。用高速钢钻头进行钻削加工时,其经济性很差(经济性同用高速钢车刀和铣刀时一样)。这对提高生产率带来了一些困难。可提高生产率的硬质合金钻头用得尚少。在使用这种刀具的地方,尚出现一些排屑问题。因而不能采用大进给量。由日本研制的New Point无横刃的钻头克服了这些困难,并且取代了普通的高速钢钻头。它的钻孔范围为直径8至40毫米。
At present, the vast majority of drilling tools (with a few exceptions for special purposes) are made of high-speed steel, such as twist drills. High-speed steel twist drills are technically successful and have long been widely used. However, the cutting speed of such a tool is greatly limited. When drilling with HSS drill bits, the economy is poor (economy is the same as with HSS turning tools and milling cutters). This poses some difficulties in raising productivity. Carbide drills that increase productivity are still used less. In the use of such tools, there are still some chip problems. Therefore can not use large feed. The New Point chiselless bit developed by Japan overcomes these difficulties and replaces the usual high speed steel bit. Its drilling range is 8 to 40 mm in diameter.