Stiffness and critical speed

The stiffness of angular contact ball bearing of high speed motorized spindle is affected by the speed and preload of motorized spindle. Radial force and motorized spindle speed will change the contact Angle and contact force between the bearing ball and the bearing channel, and reducing the preload force and increasing the speed will lead to the reduction of bearing stiffness, and then reduce the critical speed of the motorized spindle. In addition, the centrifugal displacement of the inner ring has a significant effect on the bearing stiffness.