Patent ID: 8418367

Claim:
A manufacturing method for a wheel-supporting rolling bearing unit; wherein the wheel-supporting rolling bearing unit comprises: a stationary side member, a rotating side member, and a plurality of rolling bodies; wherein of these, the stationary side member has a stationary side raceway formed around a stationary side peripheral surface thereof, and a stationary side support flange having two side surfaces for fastening to and supporting a caliper or support of a disk brake formed on an outer peripheral surface thereof, and does not rotate in a connected and fastened state to a suspension in use; the rotating side member has a rotating side raceway formed around a rotating side peripheral surface thereof, and rotates together with a wheel and a disk of the disk brake in use, and a rotating side support flange having two side surfaces for fastening to and supporting the wheel and the disk of the disk brake formed around an outer peripheral surface of the rotating side member that comprises a rotating side installation surface for installing the disk in use that is at least part of either one of the side surfaces of the rotating side support flange, and that is to be perpendicular with respect to the center axis of rotation of the rotating side member; the rolling bodies are located between the stationary side raceway and the rotating side raceway so that they can roll freely; and at least part of either one of the side surfaces of the stationary side support flange functions as a stationary side installation surface for installing the caliper or support in use; and after the stationary side member, rotating side member and rolling bodies are assembled together, while the member comprising one of the installation surfaces, either the rotating side installation surface or stationary side installation surface, is rotated with respect to the member comprising the other installation surface, a flat surface processing is performed at the same time on the one installation surface, using the other installation surface as a reference surface, such that the parallelism of the one installation surface with respect to the other installation surface is improved, and, after the flat surface processing has been performed on the one installation surface, while the member comprising the other installation surface is rotated with respect to the member comprising the one installation surface, a flat surface processing is performed at the same time on the other installation surface using the one installation surface as a reference surface, such that the parallelism of the other installation surface with respect to the one installation surface is improved.