KERKITE® COMPOSITE POLYMERS

In addition to Kerk’s standard self-lubricating acetal nut material, Kerk Motion Products offers a variety of custom compounded Kerkite composite polymers. Kerkite polymers are a family of high performance materials that offer exceptional wear properties with the cost and design advantages afforded through injection molding. Kerkite polymers offer a variety of mechanical, thermal and electrical properties, and are compatible with many chemicals and environmental conditions.

Kerkite Composite Polymers are available options for most Kerk Lead Screw Nuts and are standard materials for Linear Rail and Spline Shaft Bushings, RGS® Carriages and ScrewRail® Bushings and End Supports. Each member of the Kerkite family is compounded with lubricants, reinforcements and thermoplastic polymers formulated to provide optimum performance in its target conditions and applications. Kerk’s testing has confirmed that these materials offer superior performance and extended life.

A cornerstone of the Kerk advantage is design flexibility. Kerkite Composite Polymers, along with Kerk’s injection molding and mold making capabilities, offer huge design advantages and cost savings compared with non-moldable materials. Kerkite high performance polymers outperform other plastics and outlast metal bushings and bearings. When combined with Kerkote® TFE coating, Kerkite Composite Polymers have been shown to provide hundreds of millions of inches of travel while continuing to maintain precise, accurate motion and positioning.

303 STAINLESS STEEL

Kerk Motion Products starts with premium grade 303 stainless steel for our lead screws and linear rails. Kerk has identified the material properties most critical for producing the highest quality rolled lead screws in the world and controls these to levels unmatched in the industry. And because of Kerk’s leadership position, we are able to utilize this exceptional quality steel without having to charge premium prices.

Customers have found that Kerk lead screws have the highest thread uniformity available. Kerk stainless steel lead screws and guide rails are corrosion resistant, non-magnetic and compatible with many demanding processes. The ideal starting point for a maintenance-free product, this premium quality stainless steel is being used in numerous applications including medical applications, clean rooms, food and human contact, salt spray, cryogenics and vacuum.

SPECIAL MATERIALS

In addition to Kerk’s standard material; 303 stainless steel, self-lubricating acetal and Kerkite® high performance composite polymers, we often work with a vast array of custom materials. Kerk has rolled screws in many other materials, including 316 stainless, 400 series stainless, precipitate hardening steels, carbon steel, aluminum and titanium. Kerk nuts have been produced in many alternative plastics including PEEK, polyester, Torlon®, Vespel®, PVDF, UHMW, Ertalyte® and customer-supplied specialty materials. We have also provided metal nuts made from bronze, brass and stainless steel.

With so much flexibility in our manufacturing process, if the material can be molded, machined, ground or rolled, Kerk can likely process it using state of the art machine tools, injection molding and mold making, grinding and thread rolling equipment. Kerk excels at supplying the best overall solution to meet our customers’ requirements. Contact Kerk to find out how you can benefit from these choices.