Patent ID: 8157486

Claim:
A cutting insert comprising: an insert forward surface, an opposing insert rear surface and an insert peripheral surface extending therebetween, the insert peripheral surface comprising two opposing insert side surfaces that extend between an insert upper surface and an opposing insert lower surface, the insert upper surface and the insert lower surface forming insert end surfaces; a through bore having a bore axis and extending between the insert forward and rear surfaces; a forward cutting edge formed at an intersection of the insert upper surface and the insert forward surface; wherein: the insert lower surface comprises: an insert lower central portion, and a pair of insert lower flanks extending from the insert lower central portion to the insert side surfaces, each of the insert lower flanks being provided with an insert lower abutment surface; and the insert rear surface comprises: two spaced apart first insert rear abutment surfaces which are located closer to the bore axis than the insert lower central portion and extend in a direction between the insert end surfaces, and a second insert rear abutment surface located between the through bore and the insert upper surface.