下面介绍一种在小螺钉上钻削轴向孔的简易方法。如图所示,在螺钉上旋上一只螺母(六角或者四方螺母均可),然后将它们夹持在台虎钳上。螺钉与虎钳基面是否压紧无关重要,因为钻头本身的压力和旋转动作会使螺钉下移,从而与虎钳基面贴紧。当然,如果螺钉是右旋螺纹,钻头的切削刃也应该是右旋。 Here’s a quick way to drill an axial hole in a small screw. As shown in the figure, screw a nut (hexagonal or square nut), and then clamp them on the vice. It does not matter if the screw is pressed against the base surface of the vise, as the pressure and rotation of the drill bit itself will cause the screw to move downwards so as to be in close contact with the vise base. Of course, if the screw is a right-hand thread, the bit’s cutting edge should also be right-handed.