50 chain sprocket

A sprocket[1] or sprocket-wheel[2] is a profiled wheel with teeth, or cogs,[3][4] that mesh with a chain, track or other perforated or indented materials.[5][6] The name ‘sprocket’ applies generally to any wheel upon which radial projections engage a chain passing over it. It is distinguished from a gear in that sprockets are never meshed together directly, and differs from a pulley for the reason that sprockets have teeth and pulleys are simple.

Sprockets are found in bicycles, motorcycles, cars, tracked vehicles, and other machinery either to transmit rotary movement between two shafts where gears are unsuitable or to impart linear motion to a track, tape etc. Probably the most common form of sprocket may be found in the bicycle, in which the pedal shaft bears a sizable sprocket-wheel, which drives a chain, which, in turn, drives a little sprocket on the axle of the trunk wheel. Early automobiles had been also largely driven by sprocket and chain mechanism, a practice mainly copied from bicycles.

Sprockets are of various designs, a maximum of efficiency being claimed for every by its originator. Sprockets typically don’t have a flange. Some sprockets used with timing belts possess flanges to keep carefully the timing belt centered. Sprockets and chains are also utilized for power transmission from one shaft to another where slippage is not admissible, sprocket chains getting used rather than belts or ropes and sprocket-wheels instead of pulleys. They could be run at high speed plus some kinds of chain are so built concerning be noiseless even at high speed.