Vehicle-use bearing apparatus

A vehicle-use bearing apparatus comprising:

• a hub wheel formed of steel material to which a wheel is mounted;
• a rolling bearing mounted to an outer periphery of said hub wheel, said rolling bearing including a single first outer ring member having two rows of raceways adjacent to each other in an axial direction, an inner ring member on a vehicle outer side and having a single raceway which pairs up with said raceway in said first outer ring member on said vehicle outer side, an inner ring member on a vehicle inner side and having a single raceway which pairs up with said raceway in said first outer ring member on said vehicle inner side, and a plurality of rolling elements arranged in two rows between both said raceways in said first outer ring member and said respective raceways in both said inner ring members,
• a second outer ring member connected to an outer peripheral face of said first outer ring member for rotation with said first outer ring member and having a mounting flange for fixing said first outer ring member to a vehicle body,
• an end portion of said hub wheel being expanded radially outward toward an inner ring member provided to said rolling bearing to be formed into a caulked portion and
• a percentage of sulfur content is adjusted to be 0.020% by weight or less in steel material of which said caulked portion is formed.