Everything about Sprocket totally explained
A
sprocket is a profiled
wheel with teeth that meshes with a
chain,
track or other perforated or indented material. It is distinguished from a
gear in that sprockets are never meshed together directly, and from a
pulley by not usually having a flange at each side.
Sprockets are used in
bicycles,
motorcycles,
cars,
tanks, and other
machinery either to transmit rotary motion between two shafts where gears are unsuitable or to impart linear motion to a track, tape etc.
Cycles
In the case of bicycle chains, it's possible to modify the overall
gear ratio of the chain drive by varying the diameter (and therefore, the tooth count) of the sprockets on each side of the
chain. This is the basis of
Derailleur gears. A 10-speed bicycle, by providing two different - sized driving sprockets and five different-sized driven sprockets, allows up to ten different gear ratios. The resulting lower gear ratios make the bike easier to pedal up hills while the higher gear ratios make the bike faster to pedal on flat roads. In a similar way, manually changing the sprockets on a motorcycle can change the characteristics of
acceleration and top
speed by modifying the final drive
gear ratio.
Tracked vehicles
In the case of vehicles with
caterpillar tracks the engine-driven toothed-wheel transmitting motion to the tracks is known as the
drive sprocket and may be positioned at the front or back of the vehicle, or in some cases, both.
Film and paper
Sprockets are used in the film transport mechanisms of
movie projectors and
movie cameras. In this case, the sprocket wheels engage
film perforations in the
film stock.
Sprocket feed was also used for
punched tape and is used for
paper feed to some
computer printers.
Further Information
Get more info on 'Sprocket'.
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