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The small rail wheels fitted to road–rail vehicles allow them to be stowed away when the vehicle is in road-going mode. Wheels used for road–rail vehicles are normally smaller than those found on other types of rolling stock, such as locomotives or carriages, because the wheel has to be stowed clear of the ground when the vehicle is in road-going mode.
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
A rail vehicle wheelset, comprising two wheels mounted rigidly on an axle A wheelset is a pair of railroad vehicle wheels mounted rigidly on an axle allowing both wheels to rotate together. 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.
Single axle running gear on a self-discharging hopper. In railway terminology the term running gear refers to those components of a railway vehicle that run passively on the rails, unlike those of the driving gear. Traditionally these are the wheels, axles, axle boxes, springs and vehicle frame of a railway locomotive or wagon. [1]
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. [4]
The company began in 1918 by installing flanged railroad wheels on Ford trucks (Road–rail vehicle). The company soon began building gasoline-powered locomotives of their own following World War I. Brookville's locomotives were the first to include planetary drive axles rather than chain drives.
The wheel centre, usually already mounted on the axle, is lowered into the tire which is flange side up. The tire cools, and the retaining ring (a shaped steel bar rolled into a hoop, known as a Gibson ring , after its inventor J. Gibson of the British Great Western Railway [ 1 ] [ 2 ] ) is fitted into the groove.
A radial axle is an axle on a railway locomotive or carriage which has been designed to move laterally, along the arc of a circle, when entering a curve to reduce the flange and rail wear. William Bridges Adams was an early developer of radial axles. Radial axles were widely used on carriages in the late 19th century before the adoption of bogies.