Screw Cutting Tap螺旋切削丝锥
screw stock tap wrench丝锥扳手
screw w tap螺丝攻
Screw Cuttg Tap螺旋切削丝锥
screw cap tap machine螺帽攻丝机
ordinary screw-tap普通丝锥
hand screw tap手用丝锥
inch screw tap英制螺纹丝锥
coarse screw tap粗丝锥;粗螺丝攻
The traditional operation of processing for tap hole includes two processes: at first drill a bottom hole which is less than the tap hole. Then process the thread of the tap hole with the screw tap.
传统的螺纹孔加工都需要经过两道工序:先用钻头加工出一个比螺纹孔直径略小的底孔,然后换成丝锥加工出螺纹。
参考来源 - 钻孔、攻丝一次成形设备的控制系统研究