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Hub unit bearing for wheel

  • US 6,146,022 A
  • Filed: 12/24/1998
  • Issued: 11/14/2000
  • Est. Priority Date: 12/25/1997
  • Status: Expired due to Fees
First Claim
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1. A hub unit bearing comprising an axle hub, an outer joint member of constant velocity universal joint, and an axle bearing assembled into a unit, at least one of double row of inner raceways of the axle bearing being formed in the outer joint member, where a first hardened layer formed by quenching of the inner raceways of the outer joint member and a second hardened layer formed by quenching of ball grooves of the outer joint member are connected via a heat-affected zone incident to the first and second hardened layers.

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