manufacturer

Roller: A regular pulley has a slot for a belt, chain or cable. A reel is a wider pulley frequently used in cable techniques, permitting the cable to be wound about several times the diameter of the reel.
Loafer: A driven wheel that does not transmit electricity by means of a shaft. It spins freely, and most pushed pulleys are linked to other equipment, such as wheels or drives, by means of driveshafts.

manufacturer