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For use as guide shafts, the steel shafts must have a hardened surface. This guarantees that the balls of the ball bushings running on them do not run in due to the small contact surface.

In the case of rolled ball screws , the particularly low-cost version, the thread is produced by rolling without cutting.

See also: Whirled ball screws

By grinding the ball screw, the highest precision can be achieved with regard to pitch accuracy of the thread and concentricity, of the usually already finish-machined screw ends.

A ball screw is a machine element in which a shaft is provided with an external thread. This can be a simple screw thread, a trapezoidal thread or a round thread, which is introduced by rolling,...

Screw drives are a drive element that converts a rotary motion into a linear feed motion via a screw thread (lead screw).

In whirling, the thread is machined by means of a tool rotating around the hardened and ground raw material.