Belt and chain tensioners reduce belt or chain slack and transmit drive torque uniformly. They also reduce noise and vibration; decrease sprocket, pulley, belt, and chain wear; and increase the life ...

Idler pulleys are used to lead a chain around a bend or to take up slack in a drive chain ... An industrial idler pulley is a pulley on a shaft that rests on or presses against a drive belt to guide ...

The vast majority of motorcycles use a chain to carry drive from the output of the gearbox to the rear wheel. Sure, there are shaft-driven bikes – notably BMWs – as well as belt-driven ...