A
cutting tool (20) comprising: a
tool holder (22) having a body (24) having an insert receiving pocket (26) formed at a front end (28) thereof and a removable The single-sided square indexable
cutting insert (30) is fixed in the insert receiving pocket (26); the insert receiving pocket (26) includes: a seating surface (60) having a plate surface ( 62) having a single engagement groove (64) recessed therein and two separate support pads (66) protruding therefrom; said engagement groove (64) comprising a pair of parallel an extended groove side surface (68) forming a V-shaped cross-section, and each of said two support pads (66) has a raised
support surface (70), wherein said two support surfaces (70) share surface, and the
cutting insert (30) includes: opposing square upper and lower surfaces (32, 34) and a
peripheral side surface (36) extending therebetween, the
peripheral side surface (36) having four four corner surfaces (40) alternating with a rear surface (42); through the central axis (A1) of said upper and lower surfaces (32, 34), said cutting insert (30) can ) index; and a corner cutting edge (44) formed at the intersection of the upper surface (32) and each of the four corner surfaces (40), the lower surface (34) including a base surface ( 46) and having precisely four engaging ridges (50) protruding from said base surface (46), wherein each engaging
ridge (50) comprises a pair of parallel extending
ridge side surfaces forming a V-shaped section ( 54), and each of said engaging ridges (50) intersects one of said four corner surfaces (40) and extends therefrom towards said central axis (A1), wherein said cutting insert (30) The lower surface (34) of the insert receiving pocket (26) is clamped against the seating surface (60) by: the engagement
ridge (50) positioned closest to the operative corner cutting edge (44) the pair of ridge side surfaces (54), which are in contact with the corresponding pair of groove side surfaces (68) of the single engaging groove (64); contact with the two raised support surfaces (70) at a bearing area (72), the bearing area (72) being integrally positioned at a distance from the operative corner cutting edge ( 44) Farther.