Patent ID: 6523909
Filing Date: 2003-02-25
Classification: B60B,F16C,Y10T

Abstract:
A bearing unit for a wheel, comprising:a static ring having a raceway surface and adapted to be fixedly supported by a suspension in use; a rotary ring having a raceway surface hardened by a thermal process; a plurality of rolling members provided between the raceway surface of the rotary ring and the raceway surface of the static ring; and a fitting flange, provided on an outer peripheral surface of said rotary ring, for fixedly joining a rotary body for braking and a wheel to a side surface of said flange when in use, wherein the side surface of said fitting flange for fixedly joining said rotary body for braking and said wheel, is worked in a predetermined configuration after the raceway surface of the rotary ring has been subjected to the thermal process, and the raceway surface of the rotary ring is worked in a predetermined configuration and dimensions based on the side surface of said fitting flange after the side surface of said fitting flange has been worked in the predetermined configuration.