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

是岸幻灯片feedscrew和制固定螺丝的衣领。

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

种式固定及拆卸，且不会造成轴新的损坏。是一种很常用的固定式。