1. the spindle :160mm 2.cnc milling machine 3.with boring and milling spindle 4.with a square ram 1. Essential parameter Spindle ... technologies, such as pre-pressed, on play, high accuracy ball screw drive in axes X,Y,Z,W, multi-point, closed ... ,W adopt the pre-loaded backlash free high accuracy ball screw.4. The linear movement of the column rams and headstock ...