| 摘要 |
An object of the invention is to provide a cutting insert suitably usable even in a cutting. A cutting insert of the invention is formed in a substantially plate shape, wherein a groove part (6) is formed in a flank face (4), a main cutting edge (5) is composed of a plurality of main cutting edge divisions (5a) divided by the groove part (6), and a concave part (7) depressed in a rake face (2) is formed in a vicinity corresponding to each of the main cutting edge divisions (5) in the rake face (2). |
