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

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

Sprockets are of varied designs, no more than efficiency being claimed for every by its originator. Sprockets typically do not have a flange. Some sprockets used in combination with timing belts possess flanges to keep carefully the timing belt centered. Sprockets and chains are also used for power transmission from one shaft to another where slippage isn’t admissible, sprocket chains getting used rather than belts or ropes and sprocket-wheels rather than pulleys. They may be run at high speed plus some kinds of chain are so constructed concerning be noiseless actually at high speed.