
Ball-Screw vs. Rack & Pinion | CNC Router .
Unlike a Rack and Pinion drive, these large contact pads and ball bearing drives on EVERY axis allows the cut forces to be evenly distributed throughout the bearings, guide rails, and the frame design. This allows you to eliminate the backlash that is required in Rack and Pinion which will translate into smoother cutting edges and better finishes. For MDF doors, this is an absolutely critical ...