Double-sided cutting insert for milling

A milling tool, comprising:

• a base body formed with at least one seat for receiving a cutting insert;
• and
• at least one cutting insert arranged on said at least one seat, said at least one cutting insert having:
• a top side, a bottom side, and a circumferential lateral surface between said top and bottom sides;
• a first cutting edge formed at a transition from said top side to said circumferential lateral surface;
• a second cutting edge formed at a transition from said bottom side to said circumferential lateral surface;
• an axis of symmetry relative to which the cutting insert has a fourfold rotational symmetry;
• and
• a reference plane running perpendicularly to said axis of symmetry and dividing said cutting insert into two halves;
• each of said first cutting edge and said second cutting edge having:
• alternately arranged main cutters and face cutters, each extending between raised cutting corners and lowered cutting corners, wherein said lowered cutting corners are closer to said reference plane than said raised cutting corners;
• said circumferential lateral surface having face clearance surfaces each extending along said face cutter and coming closer to said axis of symmetry as a distance from the associated said face cutter increases;
• and
• said circumferential lateral surface having main clearance surfaces extending along said main cutter and moving farther away from said axis of symmetry as the distance from the associated said main cutter increases;
• said at least one cutting insert being arranged such that an effective main clearance angle formed at the active main cutter lies in a range from 8° to 12° and the effective face clearance angle formed at the active face cutter lies in a range from 8° to 12°.

A milling tool, comprising:

• a base body formed with at least one seat for receiving a cutting insert;
• and
• at least one cutting insert arranged on said at least one seat, said at least one cutting insert having:
• a top side, a bottom side, and a circumferential lateral surface between said top and bottom sides;
• a first cutting edge formed at a transition from said top side to said circumferential lateral surface;
• a second cutting edge formed at a transition from said bottom side to said circumferential lateral surface;
• an axis of symmetry relative to which the cutting insert has a fourfold rotational symmetry;
• and
• a reference plane running perpendicularly to said axis of symmetry and dividing said cutting insert into two halves;
• each of said first cutting edge and said second cutting edge having:
• alternately arranged main cutters and face cutters, each extending between raised cutting corners and lowered cutting corners, wherein said lowered cutting corners are closer to said reference plane than said raised cutting corners;
• said circumferential lateral surface having face clearance surfaces each extending along said face cutter and coming closer to said axis of symmetry as a distance from the associated said face cutter increases;
• and
• said circumferential lateral surface having main clearance surfaces extending along said main cutter and moving farther away from said axis of symmetry as the distance from the associated said main cutter increases;
• said at least one cutting insert being formed with a face rake surface chamfer and with a main rake surface chamfer, and being arranged such that, in an installed state, an effective chamfer angle of the face rake surface chamfer and an effective chamfer angle of the main rake surface chamfer are substantially equal to one another.