Cutting insert and a milling tool

A milling tool for milling of a slot in a workpiece, wherein the milling tool is arranged to rotate on a rotation axis, the milling tool comprising:

• a tool body;
• and
• a plurality of cutting inserts mounted on the tool body, each of the plurality of cutting inserts including
• an under side,
• an opposite upper side, which forms a chip surface and extends parallel to an extension plane,
• an edge side disposed between the upper side and the underside,
• a through axis extending through the underside and the upper side perpendicular to the extension plane,
• a longitudinal axis, which is perpendicular to and intersects the through axis and which extends through a rear portion of the cutting insert, and
• a cutting edge extending between the edge side and the chip surface, the cutting edge including a primary main cutting edge arranged to be in engagement with the workpiece during milling, a front cutting edge arranged to be in engagement with the workpiece during milling, the front cutting edge extending along an edge line, a normal to the extension plane forming an acute clearance angle with the edge side along the cutting edge, and a primary corner cutting edge arranged to be in engagement with the workpiece during milling and situated between the primary main cutting edge and the front cutting edge, the primary corner cutting edge having convex shape, and extending, with respect to the rear portion, forward from the front cutting edge to a position that is on the other side of an imaginary line, which forms a primary extension of the edge line and which extends further in a tangential direction from an end of the front cutting edge to a primary point on the primary corner cutting edge.