Swivel bearing unit

A swivel bearing unit is provided with: a fixed radially outer ring; a radially inner ring rotatable with respect to the rotation axis and stably connected to the rotation shaft; a double row rolling member interposed between the radially outer ring and the radially inner ring; a housing in which the ring of the bearing unit is accommodated; a sealing device comprising an elastomeric seal co-molded onto a shaped metal shield stably anchored to a housing, the elastomeric seal being provided with a first radial lip located radially inward and in contact with the housing and a second radial lip located radially outward and in contact with the housing, the elastomeric seal being co-molded onto the shaped metal shield stably anchored to the housing. The second radial lip is also radially located inside and radially contacted with the first radial lip, and is axially closer to the outside than the first radial lip relative to the double rows of rolling bodies; the first radial lip and the second radial lip are in s