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Caster displacement moves the steering axis ahead of the axis of wheel rotation, as with the front wheels of a shopping cart. Caster angle moves the steering axis from vertical. [3] In automobile racing, the caster angle may be adjusted to optimize handling characteristics for a particular venue. This is all connected to the front wheels.
However, the larger the diameter of a caster wheel, the higher the caster support arm must be. Either the base of a low-hanging object must be lifted higher above the wheels, or the casters must hang out to the sides straddling the low-hanging supported object. While rotating around the vertical shaft, swivel caster wheels sweep out a space.
The steering axis is the axis about which the steering mechanism (fork, handlebars, front wheel, etc.) pivots. In bicycles, the steering axis angle is called the head angle and is measured clock-wise from the horizontal when viewed from the right side. A 90° head angle would be vertical. Some examples of caster angles are: [5]
A motorcycle fork connects a motorcycle's front wheel and axle to its frame, typically via a yoke, also known as a triple clamp, which consists of an upper yoke joined to a lower yoke via a steering stem, a shaft that runs through the steering head, creating the steering axis.
[89] [88] Tires are mounted on the wheel by forcing its beads into the channel formed by the wheel's inner and outer rims. [ 90 ] [ 91 ] Valve stem : Pneumatic tires receive their air through a valve stem —a tube made of metal or rubber, with a check valve , typically a Schrader valve on automobiles and most bicycle tires, or a Presta valve ...
A jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment.
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