Cutting insert and milling tool

A milling tool comprising a tool body with a plurality of insert seats and a plurality of cutting inserts mounted in the insert seats, each of the plurality of cutting inserts including a top surface forming a chip surface, a bottom surface, a side surface connecting the top surface and the bottom surface and forming a clearance surface, and a first curved cutting edge and a second curved cutting edge formed at an intersection between the top surface and the side surface for milling of a root between two cogs of a cog wheel, wherein each of the first and second curved cutting edges has an apex, and wherein each of the plurality of cutting inserts has a rotational symmetry such that each of the first and second curved cutting edges can be used one after the other by rotating each of the plurality of cutting inserts around its symmetry axis, wherein the bottom surface includes a first planar abutment section and a second planar abutment section, a first groove extending in the first planar abutment section along an axis being parallel to a virtual line connecting the apexes of the first and second curved cutting edges, a second groove extending in the second planar abutment section along an axis being parallel to the virtual line connecting the apexes of the first and second curved cutting edges, a first stop section extending in a cross-wise direction relative to the virtual line connecting the apexes, and a second stop section extending in a cross-wise direction relative to the virtual line connecting the apexes, and wherein the first stop section protrudes above the first planar abutment section, and the second stop section protrudes above the second planar abutment section.

A milling tool comprising:

• a tool body having an axis of rotation;
• and
• a plurality of first cutting inserts arranged and located at a periphery of the tool body wherein each of the plurality of first cutting inserts includes a top surface forming a chip surface, a bottom surface, a side surface connecting the top surface and the bottom surface and forming a clearance surface, a first curved cutting edge and a second curved cutting edge formed at an intersection between the top surface and the side surface for milling of a root between two adjacent cogs of a cog wheel, wherein each of the first and second curved cutting edges has an apex, each of the plurality of first cutting inserts including a rotational symmetry such that each of the first and second curved cutting edges can be used one after the other by rotating each of the plurality of first cutting inserts around its symmetry axis, wherein the bottom surface includes a first planar abutment section and a second planar abutment section, a first groove extending in the first planar abutment section along an axis being parallel to a virtual line connecting the apexes of the first and second curved cutting edges, a second groove extending in the second planar abutment section along an axis being parallel to the virtual line connecting the apexes of the first and second curved cutting edges, a first stop section extending in a cross-wise direction relative to the virtual line connecting the apexes, and a second stop section extending in a cross-wise direction relative to the virtual line connecting the apexes, wherein the first stop section protrudes above the first planar abutment section, and wherein the second stop section protrudes above the second planar abutment section, wherein the plurality of first cutting inserts are mounted on a plurality of first insert seats to mill the root between two adjacent cogs of the cog wheel, wherein a plurality of second cutting inserts is mounted on a plurality of second insert seats, each of the plurality of second cutting inserts includes cutting edges, and wherein each of the plurality of second cutting inserts is located on the milling tool and arranged to mill a flank of one cog of the cog wheel.