Patent ID: 7632021

Claim:
A hub-bearing unit for the wheel of a motor vehicle, including: a hub with a radial flange and a central tubular portion having an outer cylindrical surface, a bearing unit with a dual set of rolling elements radially interposed between an outer, stationary bearing race and first and second radially inner bearing races located side to side on the cylindrical outer surface of the tubular portion of the hub, wherein the first inner race of the bearing axially abuts against a shoulder surface formed by the hub at an axially outer end of the tubular portion, wherein the shoulder surface of the hub includes a substantially conical surface diverging in an axially outward direction and proximate a radial surface on the radial flange; wherein the first inner race of the bearing has a complementary substantially conical surface abutting against the conical shoulder surface of the hub, wherein the conical surfaces define angles ranging between about 20° and 60° with respect to a central longitudinal axis of the unit wherein the conical surface of the inner race forms an angle with the central longitudinal axis slightly narrower than the angle formed by the conical surface of the hub with the central longitudinal axis; and wherein the bearing unit is axially spaced apart from the radial surface at an axially outer end of the conical shoulder surface of the hub.