Patent ID: 8714829
Filing Date: 2014-05-06
Classification: B60B,F16C,Y10T

Abstract:
1. A wheel support bearing assembly for rotatably supporting a vehicle wheel relative to a vehicle body structure, which assembly comprises: an outer member having an inner periphery formed with double row rolling surfaces and also having an outer periphery formed with a vehicle fitting flange through which the wheel support bearing assembly is fitted to the vehicle body structure; an inner member having an outer periphery formed with raceway surfaces held in face-to-face relation with the respective raceway surfaces in the outer member; and double row rolling elements interposed between those raceway surfaces, in which the outer member is made of a steel material and has a surface region having a thermally refined structure, formed by means of martensite hardening and tempering, and also has a core region having an as-forged structure made of ferrite and pearlite.