In rolling element bearings and related rolling components the base material is usually a temper-sensitive C/Cr steel or martensitic stainless steel. Clearance restrictions and distortion restraints leave few options for surface engineering, but the following can be considered:

• PVD Coatings e.g. TiN, CrN, etc. Processed at less than 300oC
• CVD coatings for balls, with careful heat-treatment to avoid distortion
• Oxide Treatments e.g. caustic treatment of needle rollers
• Hard Chrome Plate a thin, dense variety restricted to about 5µ thick

For gears, where the motion is combined rolling and sliding, the main options are:

• Carburising (Case-Hardening) for low carbon steels to give high hardness and wear resistance
• Local hardening (Induction) for medium carbon steels to give maximum load capacity
• Nitriding for alloy steels and lower loads

In some cases, clicking on the coating type will take you to the appropriate Poeton product.

Poeton Industries Ltd. Head Office, Eastern Avenue, Gloucester GL4 3DN, England, UK   Tel: 01452 300500  Fax: 01452 500400
Production facilities in Cardiff & Gloucester and in Wisconsin. USA.