Non-ball lead screws

Non-ball lead screws by Kerk Motion Products can be designed to self-lock and prevent back driving in vertical applications, without an external brake, unlike traditional ball screws.

Utilising sliding friction between the nut and the screw to convert rotary input motion to linear output motion, Kerk’s non-ball lead screws offer accuracy comparable to ground ball screws at a cost savings up to 90%. Because the screws do not need to be hardened, they are more easily machined, contributing to overall low product cost. Kerk’s lead screws are manufactured with a proprietary coating, which eliminates the need for external lubrication and maintenance. Additionally, Kerk’s screws provide quiet, reliable operation, with design flexibility.

Kerk offers lead screws manufactured from 303 stainless steel, and produced with Kerk’s precision rolling process. They are available in standard diameters from 3.2 to 23 mm, with standard leads from 0.5 to 76 mm, a range unachievable with ball screws, including hard metric and left-hand threads. Custom materials, sizes and leads are available on request.