BEARING DEVICE FOR VEHICLE

摘要

There is provided a vehicular-wheel bearing assembly that can reduce production costs, and has a raceway surface with a predetermined hardness that is not affected by a material of a counterpart member mounted thereto. The vehicular-wheel bearing assembly includes an inner shaft (1), an outer ring (2) provided around the inner shaft (1), and two rows of balls (3 a and 3b) provided between the inner shaft (1) and the outer ring (2) in angular contact with the inner shaft (1) and the outer ring (2). An annular raceway member (4) with a curved section that is a separate member from the inner shaft (1) and the outer ring (2) and has a raceway surface for the rolling element is provided on an outer peripheral surface (11) of the inner shaft (1) and an inner peripheral surface (12) of the outer ring (2).