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 inner face having a recess and a generally flat outer face.

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 inner face having a recess and a generally flat outer face.

An axlebox of railway vehicle bogie comprising a housing, a front cover fixed to a front side of the housing, a rear cover fixed to a rear side of the housing, a cylindrical roller bearing unit, an end cap and a backing ring. A rear chamber and a front chamber on both axial sides of the sealed bearing unit are in fluidic connection through a bypass system.

An axlebox of railway vehicle bogie comprising a housing, a front cover fixed to a front side of the housing, a rear cover fixed to a rear side of the housing, a cylindrical roller bearing unit, an end cap and a backing ring. A rear chamber and a front chamber on both axial sides of the sealed bearing unit are in fluidic connection through a bypass system.

In accordance with one aspect of the present disclosure, a wear ring assembly is provided for a railway roller bearing. The wear ring assembly includes a wear ring having a central opening for receiving a journal of a railway wheel assembly and an insert including a plurality of spacers configured to extend in the opening of the wear ring to separate the wear ring from the journal. The spacers are spaced apart from each other about the wear ring. The insert may include one or more flanges that separate the wear ring from a bearing cone. The insert may be easily installed in the opening of the wear ring and separate the wear ring from the journal and the bearing cone to reduce fretting wear between the components.

A sealing device is disposed between an inner member and an outer member of a rolling bearing that rotate relative to each other, and that acts to seal a gap between the inner member and the outer member. The sealing device includes an annular rigid part that is to be fixed to an inside of a hole of the outer member, the rigid part made from a rigid material; and an elastic part fixed to the rigid part, the elastic part made from an elastic material. The elastic part includes a seal lip having a truncated cone ring shape that is to be in slidable contact with the inner member or a member fixed to the inner member. Multiple bumps are formed on an inner peripheral surface of the seal lip, and are to be always in slidable contact with the inner member or the member fixed to the inner member. Clearances are provided between the seal lip and the inner member or the member fixed to the inner member in vicinities of the bumps.

A sealing device is disposed between an inner member and an outer member of a rolling bearing that rotate relative to each other, and that acts to seal a gap between the inner member and the outer member. The sealing device includes an annular rigid part that is to be fixed to an inside of a hole of the outer member, the rigid part made from a rigid material; and an elastic part fixed to the rigid part, the elastic part made from an elastic material. The elastic part includes a seal lip having a truncated cone ring shape that is to be in slidable contact with the inner member or a member fixed to the inner member. Multiple bumps are formed on an inner peripheral surface of the seal lip, and are to be always in slidable contact with the inner member or the member fixed to the inner member. Clearances are provided between the seal lip and the inner member or the member fixed to the inner member in vicinities of the bumps.

A railcar adapter for radially connecting a railcar body to a bearing. The railcar adapter includes an adapter body, and a top cover mounted onto an outer surface of the adapter body. The top cover is provided with at least one curved outer surface 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 includes an adapter body, and a top cover mounted onto an outer surface of the adapter body. The top cover is provided with at least one curved outer surface 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.