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Round belts are used to transmit mechanical power between two shaft-mounted pulleys. They are elastic, rounded belts that wedge into the 60-degree grooves of V-belt pulleys. They are ideal for low-torque, light-duty applications. Round belts are typically made out of strong, durable rubbers such as EPDM, nitrile, and polyurethane. They work well in lathes and drill motors.