Tool, a cutting insert, a shim and use of the cutting insert

A shim for a tool for cutting machining, the tool comprising a holder for turning or milling, the shim and an indexable cutting insert, the shim comprising an upper side, a lower side, and edge surfaces extending between the lower side and the upper side, the upper side comprising recesses, wherein the upper side comprises at least one support surface, the at least one support surface defining only three insert abutment points.

A shim for a tool for cutting machining, the tool comprising a holder for turning or milling, the shim and an indexable cutting insert;

• the shim comprising an upper side, a lower side, and edge surfaces extending between the lower side and the upper side, the upper side comprising recesses, wherein the upper side comprises two support surfaces, the two support surfaces defining only three insert abutment points.

An indexable cutting insert for a tool for cutting machining comprising a holder for turning or milling,a shim and the indexable cutting insert, wherein the cutting insert comprises an upper side and a lower side, the upper side and the lower side being connected by edge surfaces, wherein cutting edges are formed at least where the edge surfaces intersect the upper side, wherein the lower side comprises protrusions, wherein the cutting insert is provided to abut against a shim at oily three points, the cutting insert having a number of corner portions, and wherein the lower side comprises more than three protrusions, comprising support surfaces, the support surfaces being substantially provided in a plane and a number of protrusions is more than a number of corner portions of the cutting insert.

A method of using an indexable cutting insert in a tool for cutting machining comprising a holder for turning or milling, a shim and an indexable cutting insert, wherein the shim has an upper side and the cutting insert has a lower side, which lower side comprises a plurality of protrusions, wherein the cutting insert and the shim are adapted to abut against each other at only three points, and the upper side of the shim comprises recesses, comprising arranging the cutting insert in a mounted position relative to the shim such that the protrusions are spaced from the recesses and such that three of the protrusions of the cutting insert contact the shim when in the mounted position.