bogie A bogie ( ) (or truck in North American English) comprises two or more Wheelset (rail transport), wheelsets (two Railroad wheel, wheels on an axle), in a frame, attached under a vehicle by a pivot. Bogies take various forms in various modes ...

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 bearing file:NYC 100-driving-axle-friction-bearing.jpg, Plain bearing on a 1906 S-Motor locomotive showing the axle, bearing, oil supply and oiling pad file:Linear-table with detail numbered.png, A sliding table with four cylindrical bearings file:GWR Spo ...

s on older rolling stock, or

roller bearing In mechanical engineering, a rolling-element bearing, also known as a rolling bearing,ISO 15 is a bearing which carries a load by placing rolling elements (such as balls, cylinders, or cones) between two concentric, grooved rings called race ...

s on newer rolling stock.

Plain bearing file:NYC 100-driving-axle-friction-bearing.jpg, Plain bearing on a 1906 S-Motor locomotive showing the axle, bearing, oil supply and oiling pad file:Linear-table with detail numbered.png, A sliding table with four cylindrical bearings file:GWR Spo ...

s are now illegal for interchange service 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, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...

s such as the Victorian Railways A2 class, the LMS Garratt, the LSWR 415 class, 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 freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construct ...

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 A railcar (not to be confused with the generic term railroad car or railway car) is a self-propelled railway vehicle designed to transport passengers. The term "railcar" is usually used in reference to a train consisting of a single coa ...

railroad car A railroad car, railcar (American English, American and Canadian English), railway wagon, railway carriage, railway truck, railwagon, railcarriage or railtruck (British English and International Union of Railways, UIC), also called a tra ...

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

CSX 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 spring A tension coil spring A coil spring is a mechanical device that typically is used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. It is made of an elastic material formed into the ...

s. File:Rollingstock axle.jpg , Railroad car wheels are joined to a straight axle, allowing both

wheels A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle bearing. The wheel is one of the key components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axl ...

to rotate together. 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 most commonly refers to: * the adjectival form of Switzerland * Swiss people Swiss may also refer to: Places * Swiss, Missouri * Swiss, North Carolina * Swiss, West Virginia * Swiss, Wisconsin Other uses * Swiss Café, an old café located ...

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

s are not enclosed by an axle box.

References

External links

{{DEFAULTSORT:Railroad truck parts Truck parts * Car-related lists Wikipedia glossaries using subheadings