A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter includes an adapter body having two lateral channels each delimited by a pair of opposed lugs and a lateral surface perpendicular to the opposed lugs, lateral channels being adapted to cooperate with the railcar body. The railcar adapter also includes two frontal surfaces, an inner surface acting as a bearing seat for the bearing, and an outer surface. The railcar adapter provides two frontal flanges that inwardly protrude with respect to the inner surface, and that delimit with the inner surface a housing for the bearing, and at least one of the flanges is distinct from the adapter body and is mounted to a frontal surface of the body.

A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter includes two lateral channels each delimited by a pair of opposed lugs and a lateral guiding surface perpendicular to the opposed lugs, lateral channels being adapted to cooperate with the railcar body. The lateral guiding surfaces of lateral channels, in cross-section through a plane perpendicular to the axis of rotation of bearing, are curved.

A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter includes two lateral channels each delimited by a pair of opposed lugs and a lateral guiding surface perpendicular to the opposed lugs, lateral channels being adapted to cooperate with the railcar body. The lateral guiding surfaces of lateral channels, in cross-section through a plane perpendicular to the axis of rotation of bearing, are curved.

A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter provides an adapter body, and a top cover mounted onto an outer surface of the adapter body. The top cover is includes at least one recess receiving a radially outwardly projecting pin provided to the outer surface of adapter body. The top cover is adapted to be in direct radial contact with the railcar body.

A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter provides an adapter body, and a top cover mounted onto an outer surface of the adapter body. The top cover is includes at least one recess receiving a radially outwardly projecting pin provided to the outer surface of adapter body. The top cover is adapted to be in direct radial contact with the railcar body.

A bearing device for an axle has: a first axial gap (G1), which is defined between the inner ring (3) and the back cover (11) in an axial direction, and has the spacer (21) interposed therein; a second axial gap (G2), which is larger than the first axial gap (G1), and has the sealing member (22) interposed therein; and a third axial gap (G3), which is defined on a radially outer side of the second axial gap (G2), and is smaller than the second axial gap (G2).

A bearing device for an axle has: a first axial gap (G1), which is defined between the inner ring (3) and the back cover (11) in an axial direction, and has the spacer (21) interposed therein; a second axial gap (G2), which is larger than the first axial gap (G1), and has the sealing member (22) interposed therein; and a third axial gap (G3), which is defined on a radially outer side of the second axial gap (G2), and is smaller than the second axial gap (G2).

A box type sealing structure including an oil throwing ring and sealing ring with a frame and sealing portion attached to the frame, the oil throwing ring including a centrifugal structure.

A backing ring assembly for a railcar axle is provided. According to various aspects, the backing ring assembly may include a main body and a ring. The main body may include an inner surface configured to abut a fillet of a railcar axle and a receiving element on an inboard radial face of the main body. The ring may be engaged in the receiving element and may be configured to protrude over a cylindrical surface of a shoulder on the railcar axle. The ring may include an generally flat inner face, with or without a recess, and an outer face comprising a generally flat portion engaged in the receiving element and a radially extending flange not engaged in the receiving element.

A backing ring assembly for a railcar axle is provided. According to various aspects, the backing ring assembly may include a main body and a ring. The main body may include an inner surface configured to abut a fillet of a railcar axle and a receiving element on an inboard radial face of the main body. The ring may be engaged in the receiving element and may be configured to protrude over a cylindrical surface of a shoulder on the railcar axle. The ring may include an generally flat inner face, with or without a recess, and an outer face comprising a generally flat portion engaged in the receiving element and a radially extending flange not engaged in the receiving element.