Workpieces made of casting used for automobile components and large metal molds machining have uneven surface which causes chattering.

Also in casting machining, tools for high depth of cut machining is needed due to its irregular depth of machining. However, it is hard to use the existing tool in high depth of cut machining because of high cutting load. In this cutting condition with interruption, impact and chattering actualize worse surface finish and fracture of tool due to lower machinability rigidity of tool.