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On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive ). On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rod s (also known as coupling rod s); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod ; power is transmitted to the others through the side rods.

On an articulated locomotive or a rigid-framed locomotive with divided drive, such as a Duplex locomotive , driving wheels are grouped into sets which are linked together within the set.

Driving wheels are generally larger than leading or trailing wheel s. Since a conventional steam locomotive is directly driven, one of the few ways to 'gear' a locomotive for a particular performance goal is to size the driving wheels appropriately. Freight locomotives generally had driving wheels between 40" and 60" in diameter; dual-purpose locomotives generally between 60" and 70", and passenger locomotives between 70" and 100" or so.

Driving wheel on tracked vehicles (such as tank or bulldozer) is a large chain wheel that moves the track and rotates it around it.

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Topics: Driving Wheel, Driving Miss Daisy, Driving Band...

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