Abstract: To improve a metal-cutting process for machining cylindrical contours, especially eccentric cylindrical contours on a workpiece mounted to rotate about a longitudinal axis, especially with eccentric crankshaft bearings using a lathe tool, producing a finished contour that either has end measures of satisfactory surface quality or has oversize for finish machining such as grinding or dressing, so that while maintaining or enhancing surface quality and maintaining or enhancing dimensional accuracy, machining times are reduced and overall economic efficiency is raised, the invention proposes that the tools tipped with cutting inserts, especially throw-away cutting inserts, are engaged successively or even simultaneously and that at least one part of the cutting inserts is guided in relation to the workpiece at an effective cutting angle (&ggr;f) between −5° and +5° and/or a positive tool back wedge angle (&ggr;p).

Abstract: A cutting insert for milling has a generally perpendicular cutting face that is peripherally bounded by respective main cutting edges and has free faces set at a positive angle and having common edges forming auxiliary cutting edges. The insert has a positive cutting angle and the cutting face has in the region of an adjacent main cutting edge forming a cutting corner a flat or recess which extends into both adjacent main cutting edges.

Abstract: A throwaway carbide indexable insert and associated tool are disclosed with a flat body (2) that has as base a flat supporting surface (3), as well as at least two cutting edges (4, 5) at the side (6) opposite to the supporting surface (3). The essential characteristic of the invention is that the body (2) is square-shaped and that at least one major cutting portion (4a) and at least one minor cutting portion (5a) are provided. The cutting edges (4, 5) of the major cutting portion (4a) and of the minor cutting portion (5a) are inclined in opposite directions in relation to the supporting surface (3). The flank (8) of the major cutting edge (4a) is perpendicular to the supporting surface (3) and the flank (9) of the minor cutting edge (5a) falls back therefrom inclined at an angle with the supporting surface (3).

Abstract: A cutting insert has a flat body (2) and at least one supporting surface (3) and a cutting edge (4, 5), to which are associated at least one first face (7, 8) and a flank (9, 10). In order to increase the volume of metal removed, at least one chipping bulge (11) is arranged on the first face (7, 8).

Abstract: The invention relates to a cutting insert (100; 200) for material-removing machining, especially turning, grinding, engraving and boring a workpiece (36), the at least one-sided overlap of which forms the first face (28) with at least one cutting edge (26) and the surrounding side surfaces of which form at least one free face (29). To improve cutting effectiveness, the flank (29) has one or more recesses (32) at a distance (h.sub.1) from the cutting edge (26; 34).