Patent ID: 8529166

Claim:
An indexable cutting insert ( 14 ) comprising: first and second side surfaces ( 18 , 20 ) and a peripheral surface ( 22 ) extending therebetween; two cutting portions ( 26 ) located at opposite ends of the cutting insert ( 14 ); an insert bore ( 24 ) opening out to both side surfaces ( 18 , 20 ), the insert bore ( 24 ) having an insert bore axis S about which the cutting insert ( 14 ) has 180° rotational symmetry; two major abutment surfaces ( 36 ) extending from the second side surface ( 20 ) and located on opposite sides of the insert bore ( 24 ), each major abutment surface being closer to one cutting portion than to the other cutting portion; first and second minor abutment surfaces ( 38 ′, 38 ″) extending from the second side surface ( 20 ), wherein in a plan view of the second side surface ( 20 ) the first and second minor abutment surfaces ( 38 ′, 38 ″) are transverse to the two major abutment surfaces ( 36 ); and two base abutment surfaces ( 34 ) distanced from the second side surface ( 20 ) and facing away therefrom, each base abutment surface ( 34 ) associated with one major abutment surface ( 36 ) and one minor abutment surface ( 38 ′, 38 ″); wherein: the abutment surfaces ( 34 , 36 , 38 ′, 38 ″) are organized into first and second sets of insert abutment surfaces having overlapping membership, only one set capable of being operative at a given time, the first set comprising the two base abutment surfaces ( 34 ), the two major abutment surfaces ( 36 ) and the first minor abutment surface ( 38 ′), the second set comprising the two base abutment surfaces ( 34 ), the two major abutment surfaces ( 36 ) and the second minor abutment surface ( 38 ″).