Narrow-section raw edge GUFERO® engine belts are engine belts with internal gearing which fulfil the most demanding requirements imposed on them by advanced driving mechanisms. They can be used in all fields of mechanical engineering, starting with precision machinery up to heavy machinery. Among the main advantages of narrow-section raw edge engine belts are the high circumferential speed of up to 50 m/s and the temperature resistance from -30 °C to +90 °C.