G3 G5 3.969mm 5mm 7mm Diameter Silicon Nitride Ceramic Bearing Sphere Ball Si3n4 Ball For Sale

Silicon nitride has excellent mechanical properties for use in Hybrid Bearings such as lower thermal expansion, high rigidity, and wear resistance.
Silicon nitride balls are used in full ceramic and hybrid-ceramic bearings in applications where ultra-high-speed rotation is required. The density of silicon nitride is less than half that of steel, reducing the centrifugal force during bearing rotation which enables faster operating speeds. Silicon nitride balls have an insulating property which is highly effective in preventing electrolytic corrosion. This makes silicon nitride ball the optimal solution as a countermeasure against premature bearing failure in electric motors.

Strengths
* Retains strength and hardness up to 1800 A F
* Excellent resistance to corrosion and chemicals
* Weighs 60% less than steel
* Longer life than steel
* Generates less friction
* Low coefficient of thermal expansion
* Low thermal conductivity which reduces need for system cooling
* Good shock resistance
* High elasticity
* High fracture toughness
* Requires minimal lubrication
* Non-porous
* Non-magnetic

Weaknesses
* Risk of toxic off-gassing when heated to decomposition
* Subject to attack by acids and may generate flammable hydrogen gas under highly acidic conditions