Chain Drive
They are used for transferring power/motion from one shaft to another just as in the case for belt drive. Chain is always used in conjunction with a sprocket for transmitting power. A sprocket is a toothed wheel or a wheel with many contours round its circumference. The number of teeth on the sprockets determines the speed of rotation of the driven sprocket.
One advantage of the chain and sprocket drive over the belt drive is that it has a firmer grip on the area of lap than the belt drive. Chain drives do not allow slip unlike belt drive. Also, power is transmitted positively in chain drive and not by friction as in the case of belt drives.
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