For new design one, the dimension of the new electric spindle selected will be the interference constraint conditions and the machine will be without this interference.
Three quenched bushes are pressed on the hollow spindle (sleeve) with a big interference fit, thus the spindle can move forward and backward precisely within the bush.
三个大干涉配合的淬火衬套压装在空心轴（镗套）上，因此，主轴能在衬套内前后精确移动；
3
These formulas contribute to design the interference fit for the high speed spindle, improve the kinematical performance and the machining performance of the spindle.