List of railroad truck parts

A bogie or railroad truck holds the wheel sets of a rail vehicle.

An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

[1] Plain bearings are now illegal for interchange service in North America.

[7] The truck turns about the pin, and stress is taken by the center plates.

In case of a shared bogie on an articulated car, there are two on each side.