Patent ID: 7922395

Claim:
A wheel bearing device comprising: an outer ring having double rows of race surfaces formed on an inner circumference; an inner member having a wheel mounting flange at one end and double rows of race surfaces on an outer circumference, the inner member including a wheel hub and an inner ring; and double rows of rollers interposed on the respective race surfaces between the outer ring and the inner member, an end portion of a reduced diameter step portion of the wheel hub being swaged to thereby integrate the wheel hub with the inner ring, a joint outer ring of a constant velocity universal joint being fitted into an inner diameter of the wheel hub via torque transmission means, allowing the swaged portion of the wheel hub to abut the shoulder portion of the joint outer ring, wherein the swaged portion of the wheel hub is left non-quenched, and the shoulder portion of the joint outer ring has a hardened surface, with the abutted surface of the shoulder portion provided with spiral cuts by turning and having a surface roughness of Ra 5.0 or more, and wherein the spiral cuts of the hardened abutted surface of the shoulder portion are engaged with the non-quenched abutted surface of the swaged portion.