Abstract: On the basis of the process of metal cutting, a model for the leaned burr formation in metal cutting is made. Then the principle of forming the leaned burrs is studied, and the related theories are analyzed, thus a clear understanding of the forming process and the influencing factors of the burrs is obtained. Furthermore, a certain number of measures to prevent the burrs are advanced in order to control and decrease the formation of the machining burrs, guarantee and improve cutting quality, and develop new methods to restrain the machining burrs.

Key words: burr height, burr thickness, leanod burr, deburring technology, machine burrs