The load capacity of the computer shaft bearing at rest is determined by the allowable plastic deformation. Plastic deformation in rolling bearings is inevitable. If the allowable plastic deformation is small, the static load capacity of the bearing is also small; If the allowable plastic deformation is large, the pits generated in the raceway will increase the noise and vibration of the bearing in operation, reduce the operation accuracy, and affect the normal operation of the bearing.

The long-term experience of using bearings in notebook shaft factory shows that in rolling bearings, when the maximum load bearing roller and raceway contact point, the total plastic deformation (raceway plastic deformation plus plastic deformation of the rolling body) is less than 1/10,000 of the diameter of the rolling body, the normal operation of imported bearings does not have much influence. The static bearing capacity determined under such plastic deformation conditions is called the rated static load, which is generally expressed by C0.


The rated static load of the rotating shaft factory of notebook computer is determined under the assumed load condition. The rated static load of the centripetal bearing refers to the radial load, the centripetal thrust bearing (angular contact ball bearing) refers to the radial component of the load on the raceway of the half ring of the bearing, and the centripetal thrust bearing refers to the central axial load.