A double-sided cutting insert for use in milling, the cutting insert having a polygonal basic shape and being turnable into different working positions, the double-sided cutting insert comprising:
- first and second major faces arranged on opposite sides of the cutting insert and serving as top and bottom faces of the cutting insert, each one of the first and second major faces having a polygonal shape as seen in a plan view of the cutting insert;
- a centre axis extending between the first and second major faces;
- a peripheral surface extending around the cutting insert between the first and second major faces and comprising including at least a first main side face, which forms a first peripheral side of the cutting insert;
- a first main cutting edge formed at an intersection between the first main side face and the first major face;
- a second main cutting edge formed at an intersection between the first main side face and the second major face;
- a first inclined side surface and a second inclined side surface formed on the first main side face, wherein the first inclined side surface is located between the first major face and the second inclined side surface and is configured to form a relief surface for the first main cutting edge in a first one of said working positions and the second inclined side surface is located between the second major face and the first inclined side surface and is configured to form a relief surface for the second main cutting edge in a second one of said working positions, the first inclined side surface being inclined inwards as seen in a direction from a first edge of the first inclined side surface facing the first major face towards an opposite second edge of the first inclined side surface facing the second inclined side surface and the second inclined side surface being inclined inwards as seen in a direction from a first edge of the second inclined side surface facing the second major face towards an opposite second edge of the second inclined side surface facing the first inclined side surface, and wherein the first and second inclined side surfaces are located opposite each other and are inclined towards each other to thereby form a depression on the first main side face between the first and second main cutting edges ;
- and
- a first chip deflecting member formed on the first main side face as a protrusion extending across the depression formed by the first and second inclined side surfaces, wherein the first chip deflecting member has a first end facing the first main cutting edge, an opposite second end facing the second main cutting edge and at least a first chip deflecting surface that extends between said first and second ends and that is configured to deflect chips that hit the first main side face away from said depression, and wherein each one of the first and second inclined side surfaces includes a first sub surface located on a first side of the first chip deflecting member and a second sub surface located on an opposite second side of the first chip deflecting member.