Lightweight hub unit with integrated bearing rings and process for its manufacture

A hub unit (10) is provided with a hub (20) made of an aluminium alloy for plastic processing, which forms, in a single piece, an axially extending cylindrical portion (21) and a radial flange (22); two bearing rings (14, 15) are mounted axially aligned around the cylindrical portion (21), an axially inner edge (17) of the cylindrical portion (21) is plastically deformed in a radially outer direction against the axially inner bearing ring (14).