离心式—隐形阶梯孔倒镗刀离心式，隐形阶梯孔倒镗刀的结构（见图２），它是在刀杆上铣出一个半通键槽，将刀片体置于其中，销轴穿过刀片体上的销孔，而后将销轴紧固在刀杆上。操作只要将刀杆插入孔内，刀片受孔壁阻止，自动隐形于半通键槽内，当刀片越过工件时，受机床旋... Centrifugal-Inverted Step Hole Boring Machine The structure of a centrifugal, invisible step hole boring machine (see Figure 2) consists of milling a half-pass keyway in the arbor, placing the insert body in it, and passing the pin through The pin body hole, and then the pin fastened to the arbor. As long as the operation of the knife into the hole, the blade blocked by the hole wall, automatically hidden in the half-pass keyway, when the blade across the workpiece, the machine spin ...