Pulleys, found in mills, are usually cogs or wheels and are usually associated with the mill's drive system. Pulleys are mounted on a shaft or spindle and are used in a variety of ways, for example, to transmit power via belts or chains or to change speed ratios.
Pulleys are usually made of metal or plastic materials and come in a variety of sizes and shapes. Pulleys in mills are connected to a gearbox, motor, or other power source and are used to transmit rotational motion to shafts or other mechanisms.