Cutting insert

Interchangeable cutting insert comprising:

• a shank, which transitions into a cutting head, the cutting head having a chipping surface, which, when viewed from above, is a segment of a circle with a height greater than a radius of the chipping surface, wherein the shank defines a center plane which extends vertically and parallel to the shank, generally bifurcating the cutting insert;
• wherein a chord of the segment of the circle constitutes the transition to the shank, wherein a cutting edge is formed on an outer edge of the chipping surface and multiple chipbreaking structures are provided on the chipping surface;
• wherein the chip-breaking structures have depressions in the chipping surface and projections arranged between the depressions;
• wherein the projections protrude beyond the chipping surface;
• the projections being defined as ribs;
• wherein there are at least four ribs, the at least four ribs comprising two shorter ribs lying closest to the center plane and two longer ribs spaced further from the center plane than the two shorter ribs.