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Typical features include solid rubber tyres, very strong construction, and thick rubber bumpers along the top and on the ends. Before a piano trolley can be used to move a grand piano , the piano must be protected by a piano shoe , a wooden frame which protects the polished surface and provides additional strength for the sides.
[4]: 158 Metal tyres are very noisy on hard road surfaces, so many carriages wheels were made with solid rubber tyres fitted into a metal channel. [4]: 71, 162, 298 Due to age or dry climate, a wheel would shrink and the metal hoop tyre would become loose.
Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. (W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown.
Early rubber tires were solid (not pneumatic). Pneumatic tires are used on many vehicles, including cars , bicycles , motorcycles , buses , trucks , heavy equipment , and aircraft . Metal tires are used on locomotives and railcars , and solid rubber (or other polymers) tires are also used in various non-automotive applications, such as casters ...
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 axle box suspension usually consists of a spring between the bogie frame and axle bearings to permit up-and-down movement, and sliders to prevent lateral movement. A more modern design uses solid rubber springs. Brake equipment: Two main types are used: brake shoes that are pressed against the tread of the wheel, and disc brakes and pads.
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