Shafts produced with gears - toothed shafts, are made of materials which are designed for the production of gears. They can be made of steel for hardening or quenching and tempering, according to the technical requirement. Finishing is done by milling or grinding of teeth. Other functional surfaces are finished by grinding. Also, shafts on which geared elements are being mounted, are made of high quality materials for quenching and tempering. Shaft preforms are made of forged steel or rolled material.