Railroad car wheels are fixed rigidly to their axle, ensuring both wheels of the wheelset rotate at the same rate
A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. The wheel acts as a rolling component, typically press fitted onto an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie (in the UK), also called a truck (in North America). The powered wheels under the locomotive are called driving wheels. Wheels are initially cast or forged and then heat-treated to have a specific hardness.[1] New wheels are machined using a lathe to a standardized shape, called a profile, before being installed onto an axle. All wheel profiles are regularly checked to ensure proper interaction between the wheel and the rail. Incorrectly profiled wheels and worn wheels can increase rolling resistance, reduce energy efficiency and may even cause a derailment.[2] The International Union of Railways has defined a standard wheel diameter of 920 mm (36 in), although smaller sizes are used in some rapid transit railway systems and on ro-ro carriages.[3]
^Lewis, R.; Olofsson, U. (25 September 2009). Wheel–Rail Interface Handbook. Elsevier Science. ISBN 9781845694128. Retrieved 2020-10-29.
A trainwheel or rail wheel is a type of wheel specially designed for use on railway tracks. The wheel acts as a rolling component, typically press fitted...
horology, a wheeltrain (or just train) is the gear train of a mechanical watch or clock. Although the term is used for other types of gear trains, the long...
in one wheel, which caused a part of the wheel to become caught in a railroad switch (points), changing the direction of the switch as the train passed...
locomotive The undercarriage assembly of a train car or locomotive, known as a bogie, incorporating the trainwheel sets, suspension, brakes and, in powered...
Wheel Slide Protection (WSP) equipment is generally fitted to passenger trains to manage the behavior of wheel sets in “low adhesion” (reduced wheel/rail...
fundamental differences in the track and wheel design are important, especially where trams or light railways and trains have to share a section of track, as...
clinging to a railroad track that could cause trainwheel slippage, resulting in premature wheel wear and train delays Slow order A local speed restriction...
when the trainwheel rolls on the rail, creating a small contact patch that leads to very high contact pressure between the rail and wheel. Over time...
that tightens concentrically around a cylindrical piece of equipment or trainwheel to either prevent it from rotating (a static or "holding" brake), or...
watch gear train into impulses delivered to the balance wheel. Each swing of the wheel (called a "tick" or "beat") allows the gear train to advance a...
water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists...
Most escapements consist of a wheel with pointed teeth called the escape wheel which is turned by the clock's wheeltrain, and surfaces the teeth push...
The Wheel of Time is a series of high fantasy novels by American author Robert Jordan, with Brandon Sanderson as a co-author for the final three installments...
the going train side, the great wheel with the winding barrel turns anti-clockwise, and the escapement wheel turns clockwise. Great wheel to fly: 64...
timepiece's gear train. Each swing of the pendulum or balance wheel releases a tooth of the escapement's escape wheel, allowing the clock's gear train to advance...
trains. Trains which use alternative fuels such as natural gas and hydrogen are another 21st-century development. Trains are an evolution of wheeled wagons...
The Falkirk Wheel (Scottish Gaelic: Cuibhle na h-Eaglaise Brice) is a rotating boat lift in Tamfourhill, Falkirk, in central Scotland, connecting the...
speed passenger train derailed in 1998, killing 101 people. The primary cause was the fracture from metal fatigue of a wheel tyre; the train failed to negotiate...
Rhönrad, gymnastics wheel, gym wheel, or German wheel, in the beginning also known as ayro wheel, aero wheel, and Rhon rod. The large wheel consists of two...
watch. A gear train, called the wheeltrain, which has the dual function of transmitting the force of the mainspring to the balance wheel and adding up...
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