A cutting insert has an upper surface, a lower surface, a side surface connecting the upper and lower surfaces. An intersecting edge between the upper surface and the side surface is provided with a cutting edge. The cutting edge has, in order, a second major cutting edge, a first major cutting edge, a corner cutting edge connected to these major cutting edges, and a flat cutting edge. An obtuse interior first angle () is formed by the second and first major cutting edges. A interior second angle () formed by the flat cutting edge and the first major cutting edge is larger than an interior third angle () formed by the flat cutting edge and the second major cutting edge. A land is provided adjacent to the first major cutting edge, a width of the land increasing toward the first corner cutting edge.

A cutting member comprising a cutting edge (S.sub.1,S.sub.2,S.sub.i) defining a cutting envelope and configured for removing material from a workpiece leaving therein a corner of angle . The cutting edge comprises a first cutting segment (S.sub.1) and a second cutting segment (S.sub.2) spaced from the first cutting segment (S.sub.2). Respective first and second imaginary tangents (T.sub.1,T.sub.2) of the first and second cutting segments (S.sub.1,S.sub.2) intersect one another at point O located outside the cutting envelope, forming an angle corresponding to angle , thereby defining a cutting frame at least a portion of which extends beyond the cutting envelope. The cutting edge further comprises an adjoining cutting segment (S.sub.i), extending between and bridging the first cutting segment (S.sub.1) and the second cutting segment (S.sub.2), and at least partially contained within the cutting frame. The cutting member further comprises at least one auxiliary cutting element (AT.sub.1,AT.sub.2) comprising an auxiliary cutting edge (CE,CE) extending generally along one of the imaginary tangents (T.sub.1,T.sub.2) and beyond the cutting envelope. The auxiliary cutting edge (CE,CE) does not intersect the other of the imaginary tangents (CE,CE) and/or a bisector (B) of the angle .

A milling insert, including an upperside, an underside, and a reference plane parallel to the upperside and the underside. A plurality of indexable cutting edges are formed along a peripheral borderline in transitions between at least the upperside and a number of clearance surfaces. Each cutting edge includes a chip-removing main edge and a surface-wiping secondary edge, the secondary edge forming an obtuse angle with the main edge as viewed in planar view from the upperside. The main edge, from a first end of the main edge adjacent to the secondary edge, first declines toward the underside of the milling insert and then, from a lowest part, rises toward an opposite second end of the main edge. The secondary edge is inclined at an angle () in relation to the reference plane as viewed perpendicularly to the clearance surface of the secondary edge, such that a first end of the secondary edge connected to the main edge is situated on a lower level than the opposite, second end of the secondary edge.

A milling insert, including an upperside, an underside, and a reference plane parallel thereto. A plurality of indexable cutting edges are formed along a peripheral borderline in transitions between at least the upperside and a number of clearance surfaces. Each cutting edge includes a chip-removing main edge and a surface-wiping secondary edge. The main edge, from a first end of the main edge adjacent to the secondary edge, declines toward the underside of the milling insert and then, from a lowest part, rises toward an opposite second end of the main edge. The secondary edge is inclined at an angle () in relation to the reference plane as viewed perpendicularly to the clearance surface of the secondary edge, such that a first end of the secondary edge connected to the main edge is situated on a lower level than the opposite, second end of the secondary edge.

A double-sided milling cutting insert has a first cutting edge disposed at an intersection of a top side and a side surface and a second cutting edge disposed at an intersection of a bottom side and the side surface. Each of the first and second cutting edges contains three cutting edge portions which are useable by indexing. The cutting edge portions each have a cutting corner, a main cutting edge adjacent to one side of the cutting corner, and a wiper edge adjacent to the other side of the cutting corner. The main cutting edge and the wiper edge are each inclined towards a reference plane with increasing distance from the cutting corner such that the first and second cutting edges have the largest distance to the reference plane in the regions of the cutting corners. The side surface has main clearance surfaces, secondary clearance surfaces, and curved corner surfaces.