Bearing device for wheel

Abstract

A wheel support bearing assembly, in which rust preventive treatment is conducted to a pilot portion of a hub axle thereof to thereby increase the productivity and the reliability, is provided. This wheel support bearing assembly includes an outer member having rolling surfaces, an inner member having rolling surfaces opposed to the rolling surfaces of the outer member, and rows of rolling elements interposed between those opposed rolling surfaces. One of the outer and inner members that serves as a rotating member includes a hub axle having a wheel mounting hub flange and a cylindrical pilot portion protruding on an outboard side from a root portion of the hub flange for guiding a brake rotor and a wheel, both fitted to the hub flange. A coating layer of ultraviolet curable coating material is formed on a peripheral surface of the pilot portion.

Dependencies are inferred from the claim text.