Patent ID: 7121772

Claim:
An indexable cutting insert for chip removal machining, the insert having a polygonal body having opposite lower and upper faces, peripheral faces which meet at rounded corners and mutually interconnect the upper and lower faces, the corners being symmetrically located with respect to upper face bisectors; the upper face including a mid portion, and a chip face around the mid portion, intersections of the chip face and the peripheral faces forming major cutting edges and corner cutting edges at the corners; the chip face comprising a row of protrusions out of the upper face, a respective pair of oblong corner protrusions at each corner area of the chip face, each pair of protrusions being located symmetrically with respect to an associated bisector of the upper face, each oblong corner protrusion having a longitudinal axis and comprising at least two peak areas, the peak areas are positioned in line essentially on the longitudinal axis of each oblong corner protrusion.