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

是两岸幻灯片feedscrew和两固定螺丝的衣领。

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

种式固定及拆，而且不会造成轴新的损坏。是一种很常用的固定式。