1. Transfer Device in high temperature
Si3N4 keeps the good mechanical performance even in 800 Celsius however; the bearing steel will change the hardness when working temperatures up to 120 Celsius

2. High speed field, Spindle Bearing-high speed, dental bearing, Precision bearings
Si3N4 has density of 3.20g/cm3,   It has59% lighter than steel ball, which means less centrifugal force and less wear on the groove during high speed and acceleration. As the ceramic balls reduce the rotational slip with races which can help the raceways to wear faster

3. Aviation and spaceflight
The Coefficient of linear expansion of Si3N4 3.2*10-6/K, only one of fourth compared with steel. So it is stable when temperature changed. It is good material for ‎hydrogen engine

4. Chemical machinery, Food and Sea
Ceramic bearings are very good corrosion resistance most chemicals

5. Vacuum
Si3N4 has self lubrication can fix the problem of pollution from oil or grease.

6. Strong magnetic field
The particle from steel bearings magnetized to race and balls, It will cause spalling effect or big noise, So ceramic bearings is good choice.

7. Bike, skate and hobby SRC Series
Ceramic has lighter, which means less centrifugal force and less wear on the groove during high speed and acceleration. It is favor for enthusiast