Patent ID: 8092096

Claim:
A vehicle wheel bearing apparatus comprising: an outer member integrally formed with double row outer raceway surfaces on its inner circumference; an inner member including a wheel hub and at least one inner ring, the wheel hub is integrally formed with a wheel mounting flange on one end and an axially extending cylindrical portion on its other end, the at least one inner ring is press fitted onto the cylindrical portion of the wheel hub, the inner member is formed with double row inner raceway surfaces arranged opposite to the double row outer raceway surfaces; double row rolling elements are rollably contained between the double row outer raceway surfaces and double row inner raceway surfaces; a constant velocity universal joint is torque transmittably inserted into the wheel hub and axially separably connected to the wheel hub by a securing nut, a shoulder of an outer joint member of the constant velocity universal joint abuts against the inner member; an abutting surface of the inner member abuts the shoulder of the outer joint member, the inner member abutting surface having a plurality of mirror finished surface segments, an area of each mirror finished surface segment does not exceed 0.005 mm 2 .