Different kinds of industrial used belts

Conveyor Belt System Speed/Rated SpeedBelt Conveyors are material handling systems that use continuous belts to convey products or material. A rubber v-belt is a flexible machine element used to transmit power between a set of grooved pulleys or sheaves. There are many types of belt drives used today., such as agricultural harvester V belts, The earliest type of belt drive uses a flat belt made from leather or fabric. Understanding All the Automotive Belts in Your Car
Some vehicles have multiple belts, called v-belts, including motorcycle belts, that come off the crankshaft of the engine to drive the alternator, the air conditioning compressor, the power steering pump and the water pump. In older vehicles, v-belts were the standard.

Timing belts
Causes can include ordinary wear or fluid contamination. Belts are also widely used in other electronics, like lawn mower belts.