Patent ID: 7942585

Claim:
A vehicle wheel bearing apparatus comprising: an outer member formed with double row outer raceway surfaces on its inner circumference; an inner member including a wheel hub and at least one inner ring or an outer joint member of a constant velocity universal joint, the wheel hub is formed with a wheel mounting flange on its outer side end, the wheel mounting flange includes hub bolts equidistantly secured along its outer circumference to mount a wheel, the wheel hub has an axially extending cylindrical portion, the inner ring is press-fit onto the cylindrical portion of the wheel hub, the inner member is formed, on its outer circumference, with inner raceway surfaces arranged opposite to the double row outer raceway surfaces; and double row rolling elements are freely rollably contained between the inner and outer raceway surfaces of the inner and outer members; a brake pilot portion extends from a base of the wheel mounting flange toward the outer side to guide an inner circumferential surface of a brake rotor; a wheel pilot portion extends from the brake pilot portion further toward the outer side to guide an inner circumferential surface of the wheel, the wheel pilot portion includes a plurality of separated pilots separated along a circumferential direction; and a chamfered portion, formed by forging, is on a forward end of each separated pilot in view of its lathe cutting direction, the chamfered portion has a predetermined inclined angle relative to an axial end surface of each separated pilot after lathe cutting.