Patent ID: 8690496

Claim:
A cutting insert with a cutting edge, the cutting insert comprising: two opposite end surfaces, a peripheral side surface extending between the two end surfaces, and a cutting edge formed at an intersection between one end surface of the two end surfaces and the peripheral side surface; a rake face extending along the cutting edge and formed to have a positive rake angle, the rake face comprising a first area and a second area arranged in order in a direction in which a distance from the cutting edge increases, the rake face being formed such that a non-zero second rake angle (αb) in the second area is larger than a non-zero first rake angle (αa) in the first area; and a rising wall surface extending so as to form a recess along the cutting edge together with the rake face, wherein the rising wall surface comprises a first rising wall surface area and a second rising wall surface area arranged in order in a direction in which a distance from the cutting edge increases, a non-zero inclination angle (βb) of the second rising wall surface area is less than a non-zero inclination angle (βa) of the first rising wall surface area, and the first rising wall surface area is continuous with the second rising wall surface area.