List of railroad truck parts
A diagram of an American-style
truck showing the names of its parts
Axlebox
Also called an axle box. The housing attaching the end of the axle to the truck which as early as 1908 contained a set of long cylindrical rollers allowing the axle to rotate.[1][2] It was also used on steam locomotives such as the Victorian Railways A2 class, the LMS Garratt, the LSWR 415 class, and the GCR Class 1.[1]
Center pin
A large steel pin—or rod—which passes through the center plates on the body bolster and truck bolster.[3] The truck turns about the bolt, and stress is taken by the center plates.[3]
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.[3] The one on the truck may also be called center bowl.[4]
Journal box
The journal boxes were used with journal bearings.[5] Journal boxes are no longer used on North American railways.[6][7]
Truck side frame
The frame at either side of the truck.[6][7]
Truck bolster
Each truck has a bolster—a transverse floating beam—between the side frames.[8] It is the central part of every truck on which the underframe of the railcar or railroad car is pivoted through the center pivot pin.[3][8]
Image gallery
| Railroad car wheels are affixed to a straight axle, such that both wheels rotate in unison. This is called a wheelset. |
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See also
References
Further reading
