Patent ID: 7226344

Claim:
An apparatus for processing an antifriction bearing unit for a wheel, the antifriction bearing unit including an outer race, an inner race, a plurality of rolling elements, a first flange portion for directly or indirectly mounting a brake disk provided to one of the outer and inner races, and a bolt that passes through the first flange portion, the apparatus comprising: a fixing table that mounts the one of outer and inner races and is adapted to rotate; a grindstone that is provided to the fixing table and is adapted to grind the first flange portion in a state that the one of outer and inner races is mounted on the fixing table; and an engaging member that is movable in a radial direction of the fixing table and is adapted to be engaged with the bolt passing through the first flange portion to prevent the first flange portion from rotating when the fixing table mounting the one of the outer and inner races is rotated.