| 摘要 |
PURPOSE: An end mill is provided to conveniently cutting by omitting end mill replacement for rough-cutting and finish-cutting and to precisely process parts by minimizing error. CONSTITUTION: An end mill(100) includes a shank part(110), side cutting parts(120), and a flat cutting part(130). The shank part is coupled to an axial bore of a holder of a machine tool. Multiple flutes(140) is dug along a circumferential surface in the lower part of the shank in order to form the side cutting part. Cutting blades are longitudinally formed in one end of each side cutting part. The flat cutting part is formed in lower end surface of the shank part. The cutting blades of the side cutting part have trapezoidal ridges(121) and gullies(123) in longitudinal direction. |
