Poeton Coating Selection for rolling or rolling/sliding situations


	Coating Selection for rolling or rolling/sliding situations

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 300°C
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.

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