Single-sided square-shaped indexable cutting insert and cutting tool

A cutting tool (20) comprising a tool holder (22) having a main body (24) with an insert receiving pocket (26) formed in a front end (28) thereof, and a single-sided square-shaped indexable cutting insert (30) removably secured in the insert receiving pocket (26);

• the insert receiving pocket (26) comprising:
• a seating surface (60) having a floor surface (62) with a single engagement groove (64) recessed therein and two separate support pads (66) protruding therefrom;
• the engagement groove (64) including a pair of parallely extending groove flank surfaces (68) forming a V-shaped cross-section, and each of the two support pads (66) having a raised support surface (70),
• wherein the two support surfaces (70) are coplanar, and
• the cutting insert (30) comprising:
• opposing square-shaped upper and lower surfaces (32, 34) and a peripheral side surface (36) extending therebetween, the peripheral side surface (36) having four corner surfaces (40) alternating with four relief surfaces (42);
• a central axis (A1) passing through the upper and lower surfaces (32, 34), about which central axis the cutting insert (30) is indexable;
• and
• a corner cutting edge (44) formed at the intersection of the upper surface (32) with each of the four corner surfaces (40),
• the lower surface (34) including a base surface (46) and having exactly four engagement ridges (50) protruding from the base surface (46),
• wherein each engagement ridge (50) includes a pair of parallely extending ridge flank surfaces (54) forming a V-shaped cross-section, and each engagement ridge (50) intersects one of the four corner surfaces (40) and extends therefrom towards the central axis (A1),
• wherein the lower surface (34) of the cutting insert (30) is clamped against the seating surface (60) of the insert receiving pocket (26) solely by:
• the pair of ridge flank surfaces (54) of the engagement ridge (50) located closest to the operative corner cutting edge (44) making contact with the corresponding pair of groove flank surfaces (68) in the single engagement groove (64);
• and
• the base surface (46) making contact with the two raised support surfaces (70) at two bearing zones (72) entirely located further from the operative corner cutting edge (44) than the central axis (A1).