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A bogie (pronounced /ˈboʊɡi/, US dict: bō′·gē) is a wheeled wagon or trolley. In mechanics terms, a bogie is a chassis or framework carrying wheels, attached to a vehicle. It can be fixed in place, as on a cargo truck, mounted on a swivel, as on a railway carriage or locomotive, or sprung as in the suspension of a caterpillar tracked vehicle.



A bogie in the UK, or a wheel truck, or simply truck in North America, is a structure underneath a train to which axles (and, hence, wheels) are attached through bearings. In Indian English, bogie may also refer to an entire railway carriage.[1]

The first British railway to build coaches with bogies, instead of rigidly-mounted axles, was the Midland Railway in 1874.[2]

Bogies serve a number of purposes:[3]

  • Support of the rail vehicle body.
  • Stability on both straight and curved track.
  • Ensuring ride comfort by absorbing vibration and minimizing centrifugal forces when the train runs on curves at high speed.
  • Minimizing generation of track irregularities and rail abrasion.

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