A cutting tool comprising an insert holder having an insert pocket with a cutting insert seated therein, wherein:
- the insert holder comprises:
- a holder upper surface connecting at opposite ends to a pair of holder side surfaces;
- the insert pocket comprises:
- a pocket rear surface, an upper portion of the pocket rear surface merging with the holder upper surface, side extremities of the pocket rear surface merging with the holder side surfaces,
- a pocket threaded bore formed in the pocket rear surface and extending rearwardly into the insert holder, the pocket threaded bore having a threaded bore axis,
- a pocket engaging element formed in a lower portion of the pocket rear surface and extending in an opposite direction from the holder upper surface, the pocket engaging element having two spaced apart first pocket rear abutment surfaces,
- a second pocket rear abutment surface formed in an upper portion of the pocket rear surface, the second pocket rear abutment surface merging with the holder upper surface and with an adjacent holder side surface,
- spaced apart pocket lower abutment surfaces located at opposite sides of the pocket threaded bore, each of the pocket lower abutment surfaces extending transversely to the upper portion of the pocket rear surface and merging with the holder side surfaces;
- the cutting insert comprises:
- 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;
- the insert rear surface comprising:
- a first portion located between the through bore and the insert lower surface, the first portion comprising an insert engaging element that extends in a direction between the insert end surfaces and comprises two spaced apart first insert rear abutment surfaces, and
- a second portion located between the through bore and the insert upper surface, the second portion comprising a second insert rear abutment surface;
- the insert lower surface comprising:
- an insert lower central portion adjacent the insert engaging element, 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;
- the first insert rear abutment surfaces abut the first pocket rear abutment surfaces,
- the second insert rear abutment surface abuts the second pocket rear abutment surface,
- the insert lower abutment surfaces abut the pocket lower abutment surfaces, and
- a retaining screw passes through the through bore and threadingly engages the pocket threaded bore.