You must have seen a bicycle or used one and noticed that it is driven by a large driver gear wheel with pedals attached. Smaller gears at the back are driven round by this large driver gear when pedalling. As the back wheel turns, the bicycle moves forwards.
Gears driven by chains are used in machinery, motorcycles, in car engines and have many more applications.
A chain is made up of a series of links with the links held together with steel pins. This arrangement makes a chain strong, long lasting way of transmitting rotary motion from one gear wheel to another.
Chain drive has one main advantage over a traditional gear train – with only two gear wheels and a chain, rotary motion is transmitted over a distance, whereas with traditional gear train, many gears must be arranged meshing with each other in order to transmit motion.
Belt drive is a mechanical energy transmission system of transmitting power from one pulley to the other on dry surfaces.
Examples of machines using belts are :
TYPES OF BELT
ADVANTAGES OF BELT DRIVE
DISADVANTAGES OF BELT DRIVE