Hybrid angular contact ball bearing and axial thrust bearing having the same

摘要

The invention concerns a ball bearing (3) in rolling contact between the inner bearing groove (4) of an outer ring (5) and the outer bearing groove (6) of an inner ring (7), the concavity of the grooves not oriented radially but substantially inclined opposite each other, and the balls (3) are spaced apart from one another by a cage (13) arranged between the rings (5, 7), the balls (3) being made of ceramic, at least at the surface, and the rings (5, 7) made of steel being coated with a MoSx or TiAlN layer deposited by cathode spraying. The invention is applicable to ball-bearing axial stops, in particular for retaining rotor blades against centrifugal forces and for blade pitch change hinge relative to the hubs of rotors.