Patent ID: 8857283

Claim:
A ball screw comprising: a ball nut, which is rotatably mounted on a threaded shaft, and having at least one ball thread wound around an axis in a coil shape on an inner circumference for balls to roll on, wherein the ball nut is provided with a flange for fastening a belt pulley and with a bearing seat, at least one recirculating element arranged on an outer circumference of the ball nut, which is provided with a recirculating channel for the balls, and which is configured to connect a start of a coil to an end of a coil of the ball thread by means of two ends of the recirculating element in order to enable endless recirculation of the balls, and a sleeve configured to be pushed onto the ball nut, the sleeve having a cylindrical outer circumferential surface, which outer circumferential surface is configured to secure the recirculating element on the ball nut and to surround the ball nut in a tubular shape between the flange and the bearing seat, wherein the sleeve has three curved, resilient supporting regions on its inner surface, which are equiangularly distributed over the inner circumference, and which abut an outer surface of the ball nut in a circumferential direction over a peripheral angle of between 40° and 60°.