Abstract: A cutting insert includes a top surface, an edge surface and a cutting edge between the top and edge surfaces. The cutting edge is symmetrical about a centerline. The cutting edge has a first edge radius at a first point at the centerline of the cutting edge and a different, second edge radius at second points on opposite sides of and remote from the centerline of the cutting edge. The first edge radius is larger than the second edge radius. The top surface includes a land surface between the cutting edge and a remaining portion of the top surface. The land surface defines a surface that is distinct from the remaining portion of the top surface. A width of the land surface behind the cutting edge at the first point at the center of the cutting edge is different than the width of the land surface behind the second points.

Abstract: A cutting insert includes a top surface, an edge surface and a cutting edge between the top and edge surfaces. The cutting edge is symmetrical about a centerline. The cutting edge has a first edge radius at a first point at the centerline of the cutting edge and a different, second edge radius at second points on opposite sides of and remote from the centerline of the cutting edge. The first edge radius is larger than the second edge radius. The top surface includes a land surface between the cutting edge and a remaining portion of the top surface. The land surface defines a surface that is distinct from the remaining portion of the top surface. A width of the land surface behind the cutting edge at the first point at the center of the cutting edge is different than the width of the land surface behind the second points.

Abstract: A cutting tool insert is formed from a cemented carbide body and a coating particularly useful in medium-rough to rough turning of stainless-steels and superalloys. The cemented carbide body is formed from cemented carbide with a composition of 7.0-12.0 wt-% Co, 5.0-11.0 wt-% cubic carbide forming metals from group IVb, Vb and VIb of the periodic table, preferably Ti, Nb and Ta, and balance WC with a 10-30 ?m essentially cubic carbide phase free and binder phase enriched surface zone. The coating includes an MTCVD Ti(C,N) as the first layer adjacent the body having a thickness of from >2.5 to 7.0 ?m, on top of which an ?Al2O3 layer is present, with a thickness of between 2.0 and 5.0 ?m, and a total thickness of the coating of between 5.5 and 9.5 ?m. The alumina layer has a (006) texture.

Abstract: The present invention relates to a cutting tool insert comprising a cemented carbide body and a coating particularly useful in medium-rough to rough turning of stainless-steels and superalloys. The cemented carbide body consists of a cemented carbide with a composition of 7.0-12.0 wt-% Co, 5.0-11.0 wt-% cubic carbide forming metals from group IVb, Vb and VIb of the periodic table, preferably Ti, Nb and Ta, and balance WC with a 10-30 mum essentially cubic carbide phase free and binder phase enriched surface zone. The coating comprises an MTCVD Ti(C7N) as the first layer adjacent the body having a thickness of from 2.5 to 7.0 ?m, on top of which an ?-Al2O3 layer is present, with a thickness of between 2.0 and 5.0 ?m, and a total thickness of the coating of between 5.5 and 9.5 ?m. The alumina layer has a (006) texture.

Abstract: A negative insert for cutting machining has a top side, a clearance side perpendicular thereto and a cutting edge in a region interconnecting these sides and extending substantially in parallel with these sides. The insert has further a flat or rounded chamfer connecting the cutting edge to the clearance side on at least one lateral side of the insert in the region of a corner thereof. The chamfer makes an angle of 1°-15° with the clearance side for enabling application of the chamfer substantially tangentially to a work piece to be machined for bearing of the insert in two dimensions against the work piece during cutting machining operation carried out by the insert.

Abstract: A negative insert for cutting machining has a top side, a clearance side perpendicular thereto and a cutting edge in a region interconnecting these sides and extending substantially in parallel with these sides. The insert has further a flat or rounded chamfer connecting the cutting edge to the clearance side on at least one lateral side of the insert in the region of a corner thereof. The chamfer makes an angle of 1°-15° with the clearance side for enabling application of the chamfer substantially tangentially to a work piece to be machined for bearing of the insert in two dimensions against the work piece during cutting machining operation carried out by the insert.