The ball end mill is used as a tool for cutting the metal mold and some complicated shape lake a screw. The demand for the precise machining of the ball end milling is increasing. The ball end milling has the unavoidable problem of machining error by the elastic deformation of tool because of its low rigidity. https://www.roneverhart.com/Air-Jordan-12-Retro-Nubuck-GS-Black-White-University-Blue-153265-018/