Ball-screw drive for an actuator assembly, an actuator assembly, and a method for producing a ball-screw drive

A ball-screw drive for an actuator assembly of a vehicle brake, comprising:

• a rotatably mounted recirculating ball screw on which a screw nut which is closed on one side is mounted,
• wherein, on a circumferential surface of the recirculating ball screw, at least one thread is formed, in which a plurality of balls are guided in such a way that a rotation of the recirculating ball screw brings about an axial displacement of the screw nut along an axis of rotation of the recirculating ball screw,
• wherein a ball return system is integrated in the recirculating ball screw, the ball return system comprising:
• a recess formed on an end face of the recirculating ball screw which is directed towards the closed side of the screw nut;
• at least one continuous thread having a plurality of windings formed on the circumferential surface of the recirculating ball screw, with a start and an end of the thread;
• and
• a channel proceeding from each of the start and the end of the thread and running to the recess, each channel extending tangentially to a circumferential wall of the recess, and running at least part-way around the circumference of the recess before merging into the recess, so that the start and the end of the thread are interconnected by the recess via the channels.