Patent ID: 8376664

Claim:
A cutting insert ( 16 ) having a longitudinal plane of symmetry (P 1 ) and comprising a cutting portion ( 20 ) and an elongated locating portion ( 24 ) extending rearwardly from the cutting portion ( 20 ), the locating portion ( 24 ) having a dividing plane (P 2 ) perpendicular to the longitudinal plane of symmetry (P 1 ); the cutting portion ( 20 ) having a rake surface ( 26 ), an opposing base surface ( 28 ) and a peripheral side surface ( 30 ) extending therebetween, the peripheral side surface ( 30 ) meeting the rake surface ( 26 ) at an edge ( 38 ) at least a portion of which forms a cutting edge ( 40 ), the base surface ( 28 ) has a front abutment member ( 46 ) having two front abutment surfaces ( 48 ) located symmetrically on either side of and inclined with respect to the longitudinal plane of symmetry (P 1 ), the locating portion ( 24 ) being provided with protruding rear and intermediate abutment members ( 50 , 54 ) and having a longitudinal axis (L) formed at the intersection of the dividing plane (P 2 ) and the longitudinal plane of symmetry (P 1 ), the rear abutment member ( 50 ) being distal the cutting portion ( 20 ) and the intermediate abutment member ( 54 ) being located closer to the cutting portion ( 20 ) than the rear abutment member ( 50 ), the rear abutment member ( 50 ) having two rear abutment surfaces ( 52 ) located symmetrically on either side of the longitudinal plane of symmetry (P 1 ) and the intermediate abutment member having two intermediate abutment surfaces ( 56 ) located symmetrically on either side of the longitudinal plane of symmetry (P 1 ), wherein: the front and rear abutment members ( 46 , 50 ) are located on one side of the dividing plane (P 2 ) and the intermediate abutment member ( 54 ) is located on the other side of the dividing plane (P 2 ).