在深孔钻中,放置硬质合金刀片a 的刀座b 可很容易地从由油和切屑沾污的钻头的端面中松开而可很方便地进行更换.此外,每个刀座b 带有一个凸起c,该凸起由钻头端面上的一个锁紧螺钉紧固在刀体e 上,螺钉d 可放置在一个特殊的镶块 In deep-hole drilling, the seat b, on which the carbide insert a is placed, can be easily replaced from the end face of a drill bit stained with oil and chips, and can easily be exchanged. In addition, each seat b There is a bulge c, the bulge by a locking screw on the end face of the bit fastened to the body e, the screw d can be placed in a special insert