Double-sided tangential cutting insert

A double-sided tangential cutting insert, comprising:

• two identical opposing end surfaces;
• a peripheral side surface extending between the opposing end surfaces, the peripheral side surface including two opposing identical major side surfaces, two opposing identical minor side surfaces and four corner surfaces, each corner surface inter-connecting a major side surface and an adjacent minor side surface;
• a hole extending through the insert from one of the major side surfaces to the other of the major side surfaces;
• and
• each of said end surfaces comprising:
• two spaced apart major cutting edges, each major cutting edge being formed at an intersection between the end surface and one of the major side surfaces two spaced apart minor cutting edges each minor cutting edge being formed at an intersection between the end surface and one of the minor side surfaces;
• two diagonally opposite raised corners, each raised corner having a corner cutting edge, each corner cutting edge being formed at an intersection between the end surface and one of the corner surfaces, each corner cutting edge positioned between a major cutting edge and a minor cutting edge;
• two diagonally opposite lowered corners, each lowered corner having a corner non-cutting edge, each corner non-cutting edge being formed at an intersection between the end surface and one of the corner surfaces, each corner non-cutting edge being positioned between a major cutting edge and a minor cutting edge;
• major rake surfaces adjacent the major cutting edges;
• minor rake surfaces adjacent the minor cutting edges;
• cutting corner rake surfaces adjacent the corner cutting edges;
• and
• non-cutting corner rake surfaces adjacent the non-cutting edges, wherein at least one cutting corner rake surface includes a groove that extends in a generally inward direction.