ROLLING BEARING UNIT

摘要

The present invention provides a rolling bearing unit for which the weight can be decreased and the durability can be improved An outer-ring core (26) that is manufactured using a ferrous alloy and that forms an outer ring (2a) is molded to an outer-ring main body (25) that is manufactured using a synthetic resin containing reinforced fibers or using an aluminum alloy. Outer-ring raceway members (27) are fitted into and fastened to mating concave surfaces (30) of the inner circumferential surface of the outer-ring core (26) that are exposed from the outer-ring main body (25). A hub core (37) that is manufactured using a ferrous alloy and that forms a hub (3a) is molded to a hub main body (36) that is made using a synthetic resin containing reinforced fibers or using an aluminum alloy Around the outer circumferential surface of the hub core (37), inner-ring raceway members (38) are fitted onto and fastened to a fitting surface (49) of the outer circumferential surface of the hub core (37) that is exposed from the hub main body (36).