A ballscrew converts the rotation of a servo motor into precise linear axis motion using recirculating ball bearings between the screw and nut, which gives high efficiency, low friction and minimal backlash. Ballscrews are central to a CNC machine's accuracy and are a common wear item.
Preloaded, ground ballscrews with cooling deliver the tightest accuracy; worn screws are a leading cause of lost precision on older machines.
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