STEEL WHEEL

In rail systems, the specially designed cast or forged steel, essentially cylindrical element that rolls on the rail, carries the weight, that provides guidance for rail vehicles. The wheels are semipermanently mounted in pairs on steel axles and are designed with flanges and a tapered tread to provide for operation on track of a specific gauge. The wheel also serves as a brake drum on cars with on-tread brakes. (TRB)

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