A bull gear refers to the larger of two spur gears that are in engagement in any machine. A clutch is a mechanical device used to gradually stop or start the transmission of power, speed, or torque from a prime mover to a load. The most common type of clutch used in mechanical systems. A friction clutch contains two discs, each connected to its own shaft, that can be forced together to transfer energy. Stahl gear can custom manufacture or repair your bull and clutch gears for almost every application. If you are looking for custom manufacturing services of bull and clutch gears or emergency repairs, just contact us for more information or to schedule your service.