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

Axlebox

An ''axle box'', 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. Plain bearings are now illegal for

interchange service In freight rail transport, interchange is the practice of railroads conveying freight cars ("foreign" cars) from other companies over their lines. This benefits shippers, whose cargo might otherwise have to be transhipped if the point of origin and ...

in North America. As early as 1908 axle boxes contained a set of long cylindrical rollers allowing the axle to rotate. It was also used on

steam locomotive A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomot ...

s such as the Victorian Railways A2 class, the LMS Garratt, the

LSWR 415 class The LSWR 415 class is a 4-4-2T steam tank locomotive, with the trailing wheels forming the basis of its "Radial Tank" moniker. It was designed by William Adams and introduced in 1882 for service on the London and South Western Railway (LSWR ...

, and the GCR Class 1.

Center pin

A large steel pin—or rod—which passes through the center plates on the body bolster and truck bolster. The truck turns about the pin, and stress is taken by the center plates.

Center plate

One of a pair of plates which fit one into the other and support the car body on the trucks allowing them to turn freely under the car. The one on the truck may also be called center bowl.

Truck side frame

The frame at either side of the truck.

Truck bolster

Each

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

has a bolster—a transverse floating beam—between the side frames. It is the central part of every truck on which the underframe of the railcar or

railroad car A railroad car, railcar (American and Canadian English), railway wagon, railway carriage, railway truck, railwagon, railcarriage or railtruck (British English and UIC), also called a train car, train wagon, train carriage or train truck, is a ...

is pivoted through the center pivot pin.

Side bearing

There is one side bearing located on each side of the centerplate on the truck bolster. In case of a shared bogie on an articulated car, there are two on each side.

Brake rigging

The brake rigging includes the brake lever, the brake hanger, the brake pin, the brake beam and the brake shoes.

Image gallery

File:Journal box.png , An American journal box showing a plain bearingCSX Dictionary J
File:Bettendorf truck at Illinois Railway Museum.JPG , This Bettendorf-style freight car truck uses journal bearings in journal boxes that are integral parts of the side frames. The center pin can be seen pointing up from the bolster. It has coil springs File:Rollingstock axle.jpg , Railroad car wheels are affixed to a straight axle, such that both wheels rotate in unison. This is called a '' wheelset''. File:archbar ACL143.JPG , An archbar-type truck with American style journal boxes that are bolted to ends of the side frame File:Seitenkipper-Ua4201-Drehgestell.jpg , A Bettendorf-style truck with axle boxes, which are not part of the side frames, at the wheels File:Achslager-Nordbahn-Wagen.JPG, A

Swiss Swiss may refer to: * the adjectival form of Switzerland * Swiss people Places * Swiss, Missouri * Swiss, North Carolina *Swiss, West Virginia * Swiss, Wisconsin Other uses *Swiss-system tournament, in various games and sports *Swiss Internation ...

axlebox File:Oigawa-Archbar-Truck.jpg, Japanese archbar truck with axleboxes at the wheels File:Diamond Frame bogie (elliptical).jpg, Diamond frame bogie,

elliptical spring A leaf spring is a simple form of spring commonly used for the suspension in wheeled vehicles. Originally called a ''laminated'' or ''carriage spring'', and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, it ...

s and American style journal boxes File:JacobsBogieArticulatedWellCarCanadianPacificTrainBoltonON.jpg, Closeup of a shared bogie with 4 specially adapted side bearings and an articulated connector between two sections of an articulated well car. The roller bearings are not enclosed by an axle box.

References

External links

Truck parts * Car-related lists {{Rail-transport-stub