| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device for a wheel with a mounting flange part forming a bolt hole with high accuracy. <P>SOLUTION: This rolling bearing device 10 has a bolt hole 21 cut in parallel to an axial line, and an outer ring 11, on which a mounting flange 20 mounted to a vehicle is projected on its outer circumference 11c. An arc-like concave curve face 24 smoothly connecting a side face 23 of the mounting flange 20 and an outer ring outer circumference 11c and notched by the bolt hole 21, is formed at a base end of the mounting flange part 20. At an opening of the bolt hole 21 notching the concave curve face 24, an intersection C between a plane including the side face 23 and an extension face of the concave curve face 24 is positioned nearer the outer ring 11 than an axial center A of the bolt hole 21 in a radial direction of the bolt hole 21. <P>COPYRIGHT: (C)2009,JPO&INPIT |
