What are train wheels called?

A wheelset is a pair of railroad vehicle wheels mounted rigidly on an axle such that both wheels rotate in unison. Wheelsets are often mounted in a bogie (truck in North America) – a pivoted frame assembly holding at least two wheelsets – at each end of the vehicle.



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A bogie in the UK, or a railroad truck, wheel truck, or simply truck in North America, is a structure underneath a railway vehicle (wagon, coach or locomotive) to which axles (hence, wheels) are attached through bearings. In Indian English, bogie may also refer to an entire railway carriage.

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The engine, or locomotive, powers the train by pulling the cars from the front. Generally, engines are powered either by some sort of fuel carried on the train. Diesel-powered engines are by far the most popular today, but other engines are still powered by wood, coal, steam, gas, natural gas, and electricity.

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A compartment coach is a railway passenger coach (US: passenger car) divided into separate areas or compartments, with no means of moving between compartments.

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Squeal is generated from lateral slip between wheel and low rail. Further, it is understood that squeal occurrence is dependent on the friction behaviour in combination with the size and direction of the forces acting in the contact patch; more specifically, the presence of the so-called 'stick?slip loop.

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How could a train possibly move along the tracks without wheels? Trains that hover just above the tracks are actually possible due to magnetic levitation, or maglev for short. These trains use powerful magnets to stay in the air. Magnets generate a magnetic field.

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