Thomson Saginaw Ball Screw Company, LLC

Danaher Motion

Ryan B West

David A Lange

Bir Inder Singh

Stephen R Ahlers

Gwo-Shum Burt Shiu

Ryan P Thomas

John E Kinney

A ball screw assembly has an axially extending screw with an external helical groove and a nut with a through bore for receipt of the screw. The through bore has an internal helical groove adapted for cooperation with the external helical groove to define a ball raceway. A plurality of load bearing balls is disposed in the raceway for rolling contact with the internal and external grooves. A spacer is disposed between adjacent ones of the load bearing balls to prevent the balls from contacting one another. Each of the spacers has at least three pairs of diametrically opposite concave dimples adapted for contact with the load bearing balls at separate times from one another.

Ball screw assembly and spacer elements therefor

A ball screw and nut linear actuator incorporates an axially extending screw and a nut received on the screw to provide a helical raceway with recirculating load bearing balls. An axially extending member carried by the nut on a surface of the nut radially outboard of the raceway has ball return passages opening to the screws groove extending axially to span different turns of the screw groove. The ports lead to the ball return passages and are supplied with a liquid lubricant by a distributor system.

Internally lubricated ball screw and nut linear actuator

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Saginaw, MI, United States of America

Ryan B West