This is the cross slide feedscrew and two homemade setscrew collars.

是两岸幻灯片feedscrew和两个自制固定螺丝的。

However,the point of setscrew may cause damage to the shaft and may be difficult to remove.

式固定及拆卸便，而且不会造成轴新的损坏。是一很常用的固定式。