| 摘要 |
A cutting insert which includes a rake face, a flank, a cutting edge which is formed on a ridge line where the rake face and the flank intersect with each other, a land which is disposed on the rake face along the cutting edge, a breaker groove which is disposed on the rake face on the inner side of the land, and a curved surface which is formed between the groove surface of the breaker groove and the land, wherein the curvature radius of the curved surface is 0.5mm or greater. |
