The stiffness change law of ceramic ball bearings is similar to that of all-steel bearings, but the change is relatively gentle.

Under positioning preload, the centrifugal force of the inner ring and the ball, and the action of frictional heat increase the contact load of the inner and outer rings, and at the same time the contact angle of the outer ring decreases and the contact angle of the inner ring increases, thereby increasing the contact stiffness, but the outer ring contact The decrease in angle moderates the increase in axial and angular stiffness.

Under constant pressure and preload, the centrifugal force of the ball increases to increase the contact load of the outer ring, while the contact angle decreases. Since the inner and outer rings allow axial displacement, the contact load of the inner ring remains basically unchanged, but the contact angle increases. Thermal and centrifugal displacements have little effect on the contact load and contact angle of the inner and outer rings.

Although the normal contact stiffness of the outer ring increases, the normal contact stiffness of the inner ring remains basically unchanged. The result of the series effect increases the radial stiffness, but not much, and the decrease of the contact angle of the outer ring makes the axial and angular stiffness Significantly reduced.

Under positioning preload, the rigidity of ceramic ball bearings is less than that of all-steel bearings, while under constant pressure preload, the rigidity of ceramic ball bearings is greater than that of all-steel bearings.

Under positioning preload, the contact load of the all-steel bearing is more than twice that of the ceramic ball bearing. Although the elastic modulus of the ceramic ball is high, the stiffness of the all-steel bearing is greater than that of the ceramic ball bearing. Under constant pressure and preload, the contact load of the inner ring does not change much, and the high elastic modulus of the ceramic ball makes the rigidity of the ceramic ball bearing greater than that of the all-steel bearing.