A sprocket or sprocket-wheel is a profiled wheel with teeth, or cogs, that mesh with a chain, track or other perforated or indented material. … Sprockets typically do not have a flange. Some sprockets used with timing belts have flanges to keep the timing beltcentered.

Belt drives are less efficient generally than chain drives due to loss of energy to heat in the greater expansion and contraction of the belt material each revolution. But this assumes the chain drive components are accurately aligned, maintain high tension, and are manufacturered to specifications.

Highly efficient, chain drives gives the advantage of more power compared to belts. It can be used for both small and large center distances. Chain drives have lowmaintenance cost. They give a high transmission efficiency of up to 98 percent.