Engineering Reference
Miniature & Instrument Ball Bearings
Ceramic (Silicon Nitride) Ball Material
Ceramic (silicon nitride) balls feature highly controlled and consistent geometry as well as an exceptionally smooth and uniform surface finish. Compared to steel, the material's lighter weight, higher stiffness, and inert properties facilitate higher operating speeds, extended bearing life, and expanded design possibilities for unique and demanding bearing applications.
Typical Applications
Semiconductor processing (high vacuum)
Medical and dental handpieces
Turbo molecular pumps
Flow meters
Scanners
Micro turbines (power generation)
Aircraft instrumentation
Machine tool spindles
Hybrid ceramic ball bearings with silicon nitride balls.
Table 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 than steel: +1000°C | Wider operating range |
| Lower thermal expansion | Lower operating temperature |
