Stainless steel bearings currently used as heat instability and severe wear, cage using a softer alloy steel, the surface of silver, in order to reduce the starting friction. The two main parameter to evaluate the performance of high-speed high-temperature bearings include gyroscopic roll torque and slip ratio.

Gyroscopic moment is a function of the rolling body mass and angular velocity component, the greater the value, the more the movement will lead to instability, sliding between the rolling element and raceway of the more obvious, the greater the heat, it is clear that, since the silicon nitride ceramics density of only 40% of the steel, and therefore the ceramic fiber paper ceramic bearing steel bearing is much smaller than the gyroscopic torque.

At the same time there is between the rolling elements and raceways rolling and sliding with slide roll ratio is expressed, but the slide exceeds a certain value, the bearing will produce severe wear and temperature rise, and soon overheating, lubrication failure, gluing and killed.

High-speed sliding bearing by the contact load, friction gyroscopic moment, as well as additional centrifugal loads between the rolling elements and rolling to a comprehensive OK. In the high contact stresses, bearing steel produced a large plastic deformation, and hybrid ceramic bearings have excellent wear resistance, wear resistance than steel bearing more than two times higher, the fatigue life of at least three similar steel bearings times.

Comprehensive foregoing analysis, and compared to steel bearings, ceramic bearings with a smaller slide roll ratio, less heat. Fever is one of the most difficult problems the high-speed bearings, is currently playing one of the main steel bearing failure. In summary, in the high-speed high-temperature heavy-duty elastic limit lubricating working conditions, ceramic bearings with better performance.