Silicon Nitride Ceramic Bearing Ball

Product Details

Feature

BNS Ceramic Ball bearings made of silicon nitride, silicon carbide, zirconia oxide and alumina oxide are kept in our stock series. They are advantageous in having a longer service life, lower friction resistance, higher seizure resistance, higher corrosion resistance, higher rigidity, higher temperature resistance ( up to 800C) lightweight (40% of bearing steel), non magnetic, and insulated. They can be used even in an extra high – vacuum environment.

Physical Properties

Item Density Coefficient Elasticity Modulus Poisson’s

Ratio

Hardness

(HV)

Hardness

(HRC)

Bending Strength Compressive

Strength

Unit g/cm3 10-6/k Gpa Mpa Mpa
Si3N4 3.23      3.2 300-320 0.26 1500-1800 75-80 200 1400
Item Fracture Toughness Thermal Conductivity Electrical Resistivity Highest Temp Acid and Alkali Corrosion resistance performance Stress Cycles (50% failure probalility)
Unit Mpa·m1/2 W/mk Ω·mm2/m Strong Times
Si3N4 6.0-7.0 18 1018 800 107-109
Item Dimensions stability Certrifugal

Force

Non-lubrication

Friction

Magnetism Rolling contact

Fatigue Failure mode

Unit
Si3N4 With the temp,change is Small small small None Peel Off

Comparison

comparison