Patent ID: 6357925
Filing Date: 2002-03-19
Classification: B60B,F16C,F16D

Abstract:
A wheel bearing assembly comprising an outer member having two raceways on an inner peripheral surface thereof, an inner member having two raceways formed thereon so that each is opposite to one of said two raceways on said inner peripheral surface of said outer member, rolling elements arranged in two rows between said outer member and said inner member, said inner member including a wheel mounting flange having bolt holes for receiving hub bolts and also including a seal land portion between said bolt holes and said raceway on said inner member that is nearer to said wheel mounting flange, wherein said raceway on said inner member that is nearer to said wheel mounting flange is formed directly on said inner member, and wherein a heat-affected layer of a hardened layer formed on said raceway that is nearer to said wheel mounting flange extends beyond said seal land portion but not to said bolt holes of said wheel mounting flange.