A sprocket or sprocket-wheel is a profiled wheel with teeth, or cogs, that mesh with a chain, track or other perforated or indented materials. The name ‘sprocket’ applies generally to any wheel where radial projections engage a chain passing over it. It is distinguished from a gear in that sprockets should never be meshed together directly, and differs from a pulley in that sprockets have tooth and pulleys are even.
Sprockets are used 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 monitor, tape etc. Maybe the most typical form of sprocket could be within the bicycle, in which the pedal shaft bears a huge 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 powered by sprocket and chain mechanism, a practice largely copied from bicycles.
Sprockets are of varied designs, no more than 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 in one shaft to another where slippage isn’t admissible, sprocket chains getting used instead of belts or ropes and sprocket-wheels rather than pulleys. They can be run at high speed and some forms of chain are so built concerning be noiseless even at high speed.