A cutting tool (20) comprising:
- a cutting insert (22), having an insert central axis (A) defining opposite upward and downward directions (DU, DD), the cutting insert (22) comprising:
- opposite insert upper and lower surfaces (30, 32) and an insert peripheral surface (34) extending therebetween, the insert peripheral surface (34) extending circumferentially about the insert central axis (A) and comprising at least one planar major insert side abutment surface (40);
- at least one upper cutting edge (44) formed at the intersection of the insert peripheral surface (34) and the insert upper surface (30) and circumferentially displaced from the at least one major insert side abutment surface (40);
- and
- an anti-slip recess (56) recessed in the insert lower surface (32), defining a lower anti-slip recess (56a), the lower anti-slip recess (56a) comprising at least one elongated and straight anti-slip groove (58) having:
- a groove longitudinal axis (G);
- a first groove plane (GP1) containing the groove longitudinal axis (G) and the insert central axis (A);
- a second groove plane (GP2) perpendicular to the first groove plane (GP1) and containing the insert central axis (A);
- and
- two axially extending opposite groove extremities (60) and a groove middle portion (62) therebetween, the groove middle portion (62) being intersected by the insert central axis (A);
- wherein:
- the cutting insert (22) is devoid of a through hole opening out to the insert upper and lower surfaces (30, 32), for receiving a retaining screw;
- and
- each major insert side abutment surface (40) is oriented parallel to the groove longitudinal axis (G) of a respective anti-slip groove (58):
- wherein:
- the at least one elongated and straight anti-slip groove (58) is spaced apart from the insert peripheral surface (34) and
- an insert holder (24) having a holder longitudinal axis (H) defining opposite forward and rearward directions (DF, DR);
- the insert holder (24) comprising:
- a holder main surface (70) that intersects a holder end surface (72);
- and
- a holder pocket (26) recessed in the holder main surface (70) and opening out thereto at a pocket major opening (74), the holder pocket (26) having a pocket major axis (B) and comprising:
- a pocket base surface (82);
- a pocket peripheral surface (84) oriented substantially perpendicularly to the pocket base surface (82) and forming a partial boundary thereof, the pocket base surface (82) being unbounded by the pocket peripheral surface (84) at the pocket major opening (74), the pocket peripheral surface (84) extending circumferentially about the pocket major axis (B) and comprising a planar major pocket side abutment surface (88) located opposite, and facing towards, the pocket major opening (74);
- a pocket overhang portion (92) integrally formed with the holder pocket (26) overhanging the pocket base surface (82);
- and
- an elongated and straight anti-slip rib (100) projecting from the pocket base surface (82), the anti-slip rib (100) extending longitudinally along a rib longitudinal axis (R) and comprising:
- a first rib plane (RP1) containing the rib longitudinal axis (R) and the pocket major axis (B);
- and
- a second rib plane (RP2) perpendicular to the first rib plane (RP1) and containing the pocket major axis (B);
- wherein:
- the major pocket side abutment surface (88) is oriented parallel to the rib longitudinal axis (R);
- wherein:
- in a fastened position of the cutting tool (20):
- the cutting insert is releasably retained in the holder pocket (26);
- the major pocket side abutment surface (88) abuts an operative one of the at least one major insert side abutment surface (40);
- at least one pocket support surface (86) located on the pocket base surface (82) abuts an insert lower bearing surface (36) located on the insert lower surface (32);
- the anti-slip rib (100) occupies an operative one of the at least one anti-slip groove (58) that is oriented parallel to the operative major insert side abutment surface (40);
- and
- the anti-slip rib (100) does not abut the operative anti-slip groove (58).