Milling insert and a side and face milling tool

A milling insert for a side and face milling tool, comprising:

• an upper side having a rake surface and defining an upper extension plane;
• a lower side opposite the upper side, the lower side defining a lower extension plane, wherein a centre axis extends perpendicularly through the upper and lower extension planes;
• a side surface extending between the upper side and the lower side around a periphery of the milling insert, wherein the side surface includes a main radial clearance surface, two opposite secondary axial clearance surfaces, and two corner clearance surfaces extending between the main radial clearance surface and the secondary axial clearance surfaces;
• and
• at least one cutting edge formed in a transition between the upper side and the side surface, wherein each cutting edge includes a main cutting edge formed in a transition between the rake surface and the main radial clearance surface and two corner cutting edges formed in a transition between the rake surface and the corner clearance surfaces, wherein the main cutting edge, as seen in a side view of the milling insert, slopes downward from the corner cutting edges toward a midpoint of the main cutting edge, and wherein the main cutting edge, as well as the main radial clearance surface, as seen in a top view of the milling insert, both slope outward from the corner cutting edges toward the midpoint of the main cutting edge, wherein the at least one cutting edge further includes two opposite secondary cutting edges adjacent to the corner cutting edges, wherein each secondary cutting edge is formed in a transition between the rake surface and a secondary axial clearance surface portion.