Patent ID: 7419306

Claim:
A bearing unit for a railway carriage, comprising: a ring spacer interposed between and in contact with an end face of an inner race of a roller bearing to be mounted on a wheel axle and an end face of a ring member to be mounted on the same axle for axial positioning of the ring, wherein the ring spacer is provided with an elastic seal ring that makes contact with the opposing end faces of the inner race and the ring member via elastic deformation, integrally fixed to the ring spacer around an outer periphery thereof, at a generally central position in a direction of the elastic deformation, wherein one of the end faces is a plane surface and the other is a stepped surface, and the ring spacer is integrally fixed to the elastic seal ring with the outer periphery thereof bent toward the stepped portion so as to be separated from the plane surface, and one side of the elastic seal ring is fitted to the stepped portion.