A double-sided tangential cutting insert with eight different working positions, the cutting insert comprising:
- two end faces arranged opposite to each other on opposite sides of the cutting insert, wherein the two end faces are configured to serve as leading and trailing faces of the cutting insert when mounted to a tool body and as seen in an intended direction of rotation of the tool body;
- a peripheral surface extending around the cutting insert between the two end faces, the peripheral surface comprising:
- two major side faces arranged opposite to each other on opposite sides of the cutting insert;
- two minor side faces arranged opposite to each other on opposite sides of the cutting insert, each one of the two minor side faces being arranged between the two major side faces;
- and
- four corner side faces, each of the four corner side faces being arranged between one major side face and one minor side face;
- a through hole extending through the cutting insert between the two major side faces;
- a first group of cutting edges distributed along a periphery of a first end face of the two end faces and formed at an intersection between the first end face and the peripheral surface;
- a second group of cutting edges distributed along a periphery of a second end face of the two end faces and formed at an intersection between the second end face and the peripheral surface;
- a first group of abutment surfaces provided on the first end face;
- and
- a second group of abutment surfaces provided on the second end face, wherein each one of the first and the second group of abutment surfaces includes four plane, or at least substantially plane, abutment surfaces arranged on an associated end face in a grid-like pattern with two first arrays, each of the two first arrays including two consecutive abutment surfaces and extending between the two major side faces, and two second arrays, and each of two second arrays including two consecutive abutment surfaces and extending between the two minor side faces, wherein the four abutment surfaces on each one of the two end faces are separated from each other by a transition area, and wherein each abutment surface in each one of the first and the second group of abutment surfaces is inclined inwards in the cutting insert, as seen in a direction from a first edge of the abutment surface facing the adjacent major side face towards an opposite second edge of the abutment surface facing the other abutment surface in a same first array and also inclined inwards in the cutting insert as seen in a direction from a third edge of the abutment surface facing the adjacent minor side face towards an opposite fourth edge of the abutment surface facing the other abutment surface in the same second array, such that each two consecutive abutment surfaces in each array of the two first arrays are inclined towards each other and such that each two consecutive abutment surfaces in each array of the two second arrays are inclined towards each other.