Abstract: A rolling-member worm-drive (10) comprises a spindle and a nut element (12) surrounding the spindle, where the spindle and the nut element (12) between them establish a helical rolling-member screw path, where in addition this rolling-member screw path is completed by an axial rolling-member return path, contained in the nut member, to a closed rolling-member circulation path in which an endless row of rolling-members travels, where in addition two rolling-member diverting elements (26) are arranged on the nut element (12) for transfer of the rolling-members between the rolling-member screw path and the rolling-member return path and between the rolling-member return path and the rolling-member screw path, and where at least one of the rolling-member diverting elements (26) is held on the nut member (12) by means of a securing element (36).

Abstract: In a ball screw and nut drive device, a helical ball spindle or channel is formed in the inner surface of a nut body and the outer surface of a screw. Balls are circulated through the helical ball channel being returned from one end to the other of the channel by deflecting channels and a return channel. Each deflecting channel is formed in part by a deflecting member fitted into a recess formed in the inner surface of the nut body. The deflecting member includes a projection for lifting balls out of the helical ball channel into the deflecting channel. The deflecting channel has a rectilinear part which can receive balls from the helical ball channel and a curved part connecting the rectilinear part with the return channel. The deflecting channel in the deflecting member is open along its length and the balls passing therethrough contact a wall in the recess formed in the nut body.