A minor cutting edge has a first minor cutting edge and a second minor cutting edge that extends inward of the insert in a direction of an insert short side face axial line, as the second minor cutting edge extends from the first minor cutting edge in a direction of an insert major face axial line. A flank face of the second minor cutting edge is inclined outward of the insert in the direction of the insert short side face axial line, as the flank face extends from the second minor cutting edge in the direction of an insert long side face axial line, and is inclined outward of the insert in the direction of the insert short side face axial line, as the flank face extends from a major face adjacent to the flank face in the direction of the insert major face axial line.

A cutting insert includes an upper surface, a lower surface, a side surface, and an upper cutting edge. The upper cutting edge includes a major cutting edge having an outwardly projecting curvilinear shape, and a minor cutting edge having a straight line shape and being continuous with the major cutting edge. The side surface includes a continuous inclined surface with the major cutting edge and is inclined outward from the upper surface to the lower surface with respect to a virtual straight line connecting the respective centers of the upper and lower surfaces. An inclination angle of the inclined surface with respect to a virtual straight line on the side surface increases from a portion of the inclined surface which is continuous with an end portion of the major cutting edge to a portion of the inclined surface which is continuous with a center of the major cutting edge.

A double-sided cutting insert includes two end surfaces that each includes major rake surfaces adjacent major cutting edges that form first angles with planes of major side surfaces of the insert, and a central support surface forming a second angle with the planes of the major side surfaces. Each end surface further includes major intermediate surfaces between the major rake surfaces and the central support surface. The major intermediate surfaces form third angles with the planes of the major side surfaces that are greater than the first angles and smaller than the second armies when measured in a central plane that extends along a central axis of the hole and is generally perpendicular to the planes of the major side surfaces and planes of the central support surfaces.

A cutting insert includes an insert body having a central longitudinal axis. The insert body has a first radial side and a second radial side. A first axial side includes a first relief face, a second relief face, and a first recess having a first bottom surface. The first relief face, the second relief face, and the first bottom surface are arranged such that each point of same is visible from either a first side view towards the first radial side or from a second side view towards the second radial side. The insert body is longer along the longitudinal direction at a central portion towards the central longitudinal axis than at an outer portion towards one of the first or second radial sides. Further a milling tool is disclosed.

In a cutting insert according to an embodiment of the present invention, an upper surface sequentially includes a first rake surface and a second rake surface. The first rake surface being inclined toward the lower surface as going inward from the cutting edge at a first rake angle on a basis of a perpendicular plane perpendicular to a central axis extending between the upper surface and a lower surface. The second rake surface is located more inward than the first rake surface and is inclined toward the lower surface at a second rake angle different from the first rake angle on the basis of the perpendicular plane. An intersecting part of the first rake surface and the second rake surface includes a protruded part located at a highest position in a region of the intersecting part along the second side surface. A cutting tool with the cutting insert, and a method of producing a machined product by using the cutting tool are also provided.

A double-sided tangential cutting insert includes two identical opposing end surfaces and a peripheral side surface extending between the end surfaces. The peripheral side surface has two opposing identical major side surfaces, two opposing identical minor side surfaces and four corner surfaces. Each of the end surfaces include two spaced major cutting edges formed at an intersection between the end surface and one of the major side surfaces, two spaced minor cutting edges formed at an intersection between the end surface and one of the minor side surfaces, two diagonally opposite raised corners, each with a corner cutting edge, two diagonally opposite lowered corners, each having a corner non-cutting edge, major rake surfaces adjacent the major cutting edges, minor rake surfaces adjacent the minor cutting edges, cutting corner rake surfaces adjacent the corner cutting edges, and non-cutting corner rake surfaces adjacent the non-cutting edges.

A cutting insert comprises a first surface sequentially including a first and second inclined surface. The first inclined surface is inclined toward the second surface, going inward from the edge at a first inclined angle on a basis of a perpendicular plane perpendicular to a central axis extending between the first surface and a second surface. The second inclined surface, located more inward than the first inclined surface, is inclined toward the second surface at a second inclined angle different from the first inclined angle on the basis of the perpendicular plane. An intersecting part of the first inclined surface and the second inclined surface includes a first part located at a highest position in a region of the intersecting part along the second side surface. A cutting tool with the cutting insert, and a method of producing a machined product using the cutting tool are provided.

A cutting insert comprises a first surface sequentially including a first and second inclined surface. The first inclined surface is inclined toward the second surface, going inward from the edge at a first inclined angle on a basis of a perpendicular plane perpendicular to a central axis extending between the first surface and a second surface. The second inclined surface, located more inward than the first inclined surface, is inclined toward the second surface at a second inclined angle different from the first inclined angle on the basis of the perpendicular plane. An intersecting part of the first inclined surface and the second inclined surface includes a first part located at a highest position in a region of the intersecting part along the second side surface. A cutting tool with the cutting insert, and a method of producing a machined product using the cutting tool are provided.

A cutting insert has a first (top) end surface, a second (bottom) end surface, a peripheral side surface connecting the top and bottom end surfaces, and a mounting hole having a central axis O which penetrates the top and bottom end surfaces. Cutting edges are formed on an intersecting edge between the first end surface and the peripheral side surface. The second end surface has an inclined part. When a virtual plane substantially perpendicular to the axis O and passing through any point of the cutting edges is defined, the inclined part is inclined so as to be more distant from the virtual plane, heading from the peripheral side surface to the axis O. A projected part projected in a direction along the axis O is formed in an area around the mounting hole in the inclined part. This reinforces the strength of the mounting hole.

A cutting insert includes an upper surface, a lower surface, a side surface, and an upper cutting edge. The upper cutting edge includes a major cutting edge having an outwardly projecting curvilinear shape, and a minor cutting edge having a straight line shape and being continuous with the major cutting edge. The side surface includes a continuous inclined surface with the major cutting edge and is inclined outward from the upper surface to the lower surface with respect to a virtual straight line connecting the respective centers of the upper and lower surfaces. An inclination angle of the inclined surface with respect to a virtual straight line on the side surface increases from a portion of the inclined surface which is continuous with an end portion of the major cutting edge to a portion of the inclined surface which is continuous with a center of the major cutting edge.