Patent ID: 6851897

Claim:
A cutting tool insert in a substantial plate form and of polygonal shape, the cutting tool insert comprising: a top face constructed and arranged to function as a tooth face; edge lines on the top face opposite a seat face of the insert, the edge lines formed as cutting edges, the cutting edges including a major cutting edge; and side faces extending from the tooth face toward the seat face, the side faces being flanks; wherein as viewed from above, the major cutting edge extends from a first corner to a second corner; wherein as viewed from above, the major cutting edge includes a first edge line and a second edge line that meet to form a first obtuse angle, an area around the first obtuse angle protrudes slightly outwards; wherein as viewed from the side, the first edge line slopes down towards the second edge line so as to make a distance to the seat face decrease gradually, and, forms a second obtuse angle with the second edge line causing an area of the top face around the second obtuse angle to dip down towards the seat face; and wherein the first edge line is shorter than the second edge line.