A sprocket, sprocket-wheel or chain wheel is a profiled wheel with teeth, or cogs, that mesh with a chain, track or other perforated or indented material. The name sprocket applies generally to any wheel upon which radial projections engage a chain passing over it.
Sprockets are used in bicycles, motorcycles, cars, tracked vehicles, 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
Conveyor sprockets are used in conjunction with conveyor chains or conveyor belts. ... Single, double, triple, quadruple and quintuple conveyor sprockets are commonly available.