| 摘要 |
The present invention relates to a cutting insert and a cutting tool having same. The cutting insert, according to one embodiment of the present invention, comprises: an upper surface; a lower surface having a flat surface; a fastening hole penetrating the upper surface and the lower surface; lateral surfaces connecting to each of the upper surface and the lower surface; and cutting blades being formed by the upper surface and the lateral surfaces, wherein a first cutting blade among the cutting blades is inclined downward from one side to the other side, a main lateral surface among the lateral surfaces comprises a first main lateral surface connected to the upper surface so as to constitute the first cutting blade, and a second main lateral surface connected to the first main lateral surface and the lower surface, wherein the first main lateral surface has a negative surface, and the second main lateral surface has a positive surface, and a sub lateral surface among the lateral surfaces comprises a first sub lateral surface connected to the upper surface so as to constitute a second cutting blade, and a third sub lateral surface connected to the upper surface and the lower surface, wherein the first sub lateral surface has a positive surface, and the third sub lateral surface has a negative surface. |
