| 摘要 |
A cutting insert is suitable for 90° shoulder milling. The cutting insert includes two end surfaces: first and second end surfaces; a peripheral side surface extending therebetween; and a cutting edge formed at an intersecting ridge portion between the first end surface and the peripheral side surface. The cutting edge is formed so that the first end surface functions as a rake face and a part of the peripheral side surface functions as a flank. A side surface portion of the peripheral side surface adjacent to at least a part of the cutting edge includes a first flank portion adjacent to the cutting edge, a second flank portion, a third flank portion, and a fourth flank portion in this order from the first end surface side toward the second end surface side. |
