Hartner公司最近推出了一种可更换刃片的麻花钻头。它的刃片用两个螺钉固定在麻花钻上,刃片上有两个主切削刃,为不重磨式,因而节省了钻头重磨时间。刃片复有氮化钛镀层,因而可显著提高切削用量。麻花钻内有两个冷却液通道,加工时可用冷却液冷却钻头并 Hartner recently introduced a twistable twist drill bit. Its blade is secured to the twist drill with two screws, with two main cutting edges on the blade, which are not worn and thus save the time for bit re-grinding. Plaque with titanium nitride coating, which can significantly improve the cutting amount. There are two coolant channels in the twist drill, coolant can be used to cool the drill while machining