In order to compare the bearing capacity of the bearings against pitting, the maximum load of the bearing is the basic rated dynamic load when the rated life is 1 million rpm (106).
That is, bearing under the action of rated dynamic load C, this kind of bearing works 1 million turn (106) without the reliability of pitting failure is 90%,c the higher the bearing capacity.
For basic rated dynamic loads
1. Radial bearing refers to the pure radially loaded
2. Thrust ball bearing refers to the pure axial load
3. Centripetal thrust bearing is the radial component producing pure radial displacement