Turning tool for metal cutting

A turning tool comprising:

• a tool body;
• a turning insert, the turning insert including a top surface, an opposite bottom surface, a reference plane extending between the top and bottom surfaces, a center axis intersecting the top and bottom surfaces, a side surface connecting the top surface and the bottom surface, and a cutting edge adjacent to the top surface and the side surface, the cutting edge being circular and concentric in relation to the center axis, wherein the bottom surface of the turning insert includes a set of flat surfaces, wherein the flat surfaces extend in a plane parallel to the reference plane;
• and
• an insert seat, wherein the insert seat includes a bottom surface, wherein the bottom surface of the insert seat includes a support surface, wherein the turning insert is mounted in the insert seat by a clamping device, the insert seat including a rear surface, wherein the side surface of the turning insert is in contact with the rear surface of the insert seat, wherein the bottom surface of the turning insert includes a set of radial grooves, wherein the radial grooves intersect the side surface, wherein the bottom surface of the insert seat includes a first ridge, wherein the support surface of the insert seat is planar, wherein the first ridge is arranged to be positioned inside one of the radial grooves formed in the bottom surface of the turning insert, wherein at least one of the flat surfaces of the turning insert is in contact with the support surface of the insert seat, and wherein in a cross section, the first ridge is smaller than one of the radial grooves, wherein the tool body includes a coupling portion, wherein the coupling portion extends along a longitudinal axis of the turning tool, wherein in a top view, an area of the support surfaces are greater than an area of the ridge or ridges, wherein the bottom surface of the insert seat includes a second ridge, wherein the first ridge and the second ridge are aligned, wherein the first ridge extends primarily along or parallel to the longitudinal axis of the turning tool, and wherein the bottom surface of the insert seat includes two support surfaces, wherein the support surfaces are located in a common plane.