Research of machining dynamics have longstanding history in manufacturing processes with consideration of cutting interruption, intermittency, and coupled interaction between the tool and workpiece. It gives better understanding of the underlying physics of material removal. The complex motions in cutting dynamics are mainly caused by discontinuities, including chip and tool – piece seizure and complex stick–slip motion. Through the application of discontinuous system theory, a comprehensive understanding of the grazing phenomena is induced by the boundary of frictional-velocity and the loss of contact between the tool- and workpiece are discussed. Significant insights are to control machine – tool vibration and to develop tool wear free machine – tool concept. The experiment on the Stainless steel machining research is shown here and the creation of machine tool vibrations and cutting dynamics is represented in this paper.