Patent ID: 7311363
Filing Date: 2007-12-25
Classification: B60B,F16C

Abstract:
1. A vehicle wheel bearing apparatus comprising: a double row rolling bearing for rotatably supporting a wheel relative to a body of a vehicle including double row rolling elements between an inner member and an outer member, said inner member includes a wheel mounting flange, for securing the wheel via a brake rotor, and a cylindrical brake pilot portion extending from the wheel mounting flange for supporting the brake rotor, a plurality of hub bolts are press-fit into the wheel mounting flange along its circumference; said wheel mounting flange includes an annular recess portion recessed from the side surface, of an outboard side, at a base of the wheel mounting flange said recess having a width of at least 10 mm, said annular recess portion includes a corner region axially inward of said recess to form an undercut, said corner region crossing the brake pilot portion which is formed with a predetermined hardened layer by high frequency induction quenching; and said side surface is cut after the hub bolts have been press fit into the wheel mounting flange.