Turning insert

A turning insert comprising:

• a top surface;
• an opposite bottom surface including rotation prevention means arranged to prevent or at least reduce rotation or movement of the turning insert;
• side surfaces connecting the top surface and the bottom surface;
• a reference plane located parallel to and between the top surface and the bottom surface, an area of the top surface being greater than an area of the bottom surface, wherein both the top and bottom areas are axially projected on the reference plane;
• a center axis extending perpendicular to the reference plane and intersecting the reference plane;
• three nose portions formed symmetrically around the center axis, each nose portion including a first cutting edge, a second cutting edge and a convex nose cutting edge connecting the first and second cutting edges, wherein in a top view the first and second cutting edges on a same nose portion form a nose angle of 25-50° relative to each other, wherein a distance from the first cutting edge to the reference plane decreases as a distance from the nose cutting edge increases, the turning insert being single-sided such that the first and second cutting edges are formed only at a border of the top surface;
• a bisector extending equidistantly from each of the first and second cutting edges, and wherein each bisector intersects the center axis;
• and
• a first side surface including a first clearance surface adjacent to the first cutting edge, a third clearance surface, and a second clearance surface located between the first clearance surface and the third clearance surface, wherein the third clearance surface forms an angle ε in relation to the bottom surface measured in a plane perpendicular to the first cutting edge, wherein the second clearance surface forms an angle σ in relation to the bottom surface measured in a plane perpendicular to the first cutting edge, wherein the first clearance surface forms an angle γ in relation to the bottom surface measured in a plane perpendicular to the first cutting edge, wherein σ>ε, and wherein the side surfaces of each nose portion are configured symmetrically in relation to a plane perpendicular to the reference plane and including the bisector.