List of railroad truck parts

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

Source: Wikipedia — List of railroad truck parts (CC BY-SA 4.0)