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Alternative Ball Material
CERBEC® silicon nitride balls

Rendered bearing

Engineered specifically for bearings, CERBEC® silicon nitride balls deliver highly controlled, consistent geometry (often better than 0.000001 tolerance) and extremely smooth and consistent surface finish (<0.15 micro-inch Ra). The stiffness, light weight and inertness of silicon nitride offer significant bearing performance advantages, including higher operating speeds, extended bearing life and expanded design possibilities for unique and demanding bearing applications.

Typical Applications

Chart of Performance Benefits

PROPERTIES IMPROVEMENT IN BEARING PERFORMANCE
Lower internal friction Lower internal temperature
Reduced cage and raceway wear
Lighter weight: 58% lighter than steel Lighter overall bearing weight
Decreased centrifugal force
Decreased gyroscopic movement
Higher stiffness & higher hardness: 68% stiffer than steel Reduced skidding
Less friction
Lower operating temperatures
Less wear
Smoother surface: 75% smoother than steel Decreased lube degradation
No cold welding/adhesive wear
Less friction
Lower operating temperature
Less wear
Corrosion resistance Durability in harsh environments
Less wear
Resists galling
Higher maximum temperature: 1000° C vs. 320° C for steel Wider operating range
Lower thermal expansion Lower operating temperature

Trademark

CERBEC® is a registered trademark of Coorstek, Inc.