Abstract: The invention relates to a milling cutter head having a plurality of blade holders (11) which are inserted into recesses of a parent body (10) and on which respective blades (12) are brazed in position. According to the invention, at least one blade (12) is angled and has a longer section (c), lying radially on the outside with respect to the axis of the milling cutter head, and a shorter section (b) which lies radially on the inside and is angled at 3° to 7°, preferably 5°.

Abstract: A support movable in a predetermined direction carries a cutting insert having a body formed with a front face lying generally in a plane generally parallel to the direction and an arcuate edge face having an inner end merging with the front face, an outer end and defining between the inner and outer ends an arcuate cutting edge. A side face directed forward in the direction defines an outer cutting edge extending transversely of the front face from the outer end of the arcuate cutting edge.

Abstract: The invention relates to a cutting insert which can be used to clamp into a disk-shaped or strip-shaped tool body (30,36). Said cutting insert comprises a front surface (10, 22) to which a convex front surface (11) is joined to at least one side. The arc-shaped edges (12) of the front surface extend at an angular dimension of >90° and =180° and are embodied as cutting edges (12). According to the invention, either a linear edge which is essentially vertical in relation to the front surface or cutting edge (14) which runs counter to the vertical by a maximum 4° or a concave-shaped edge (24) are joined to the arc-shaped edge(s).

Abstract: The invention relates to a drilling tool comprising a tool holder, on whose front face interchangeable cutting attachments are fixed and which has a shaft part on the opposite end to said attachments and an adjusting device for minimizing the tolerance measurement determined by the drilling system. In order to improve the aforementioned adjusting device, the invention is characterized in that the tool holder (1) has groove-shaped recesses (5, 8), which lie on respective diametrically opposed sides and which are eccentrically arranged on a plane that is perpendicular to the longitudinal axis of the tool holder. Said groove-shaped recesses have a half-cylinder extension on each of the sides facing the longitudinal axis of the tool holder. A bolt (2, 3), whose dimensions correspond to the size of the cylinder, is located in each extension. The first bolt (2) is connected to a tapered adjusting element (9) using a double-threaded screw (11) which is positioned radially in relation to the tool holder (1).

Abstract: The invention relates to a drilling tool comprising a tool holder, on whose front face interchangeable cutting attachments are fixed and which has a shaft part on the opposite end to said attachments and an adjusting device for minimizing the tolerance measurement determined by the drilling system. In order to improve the aforementioned adjusting device, the invention is characterized in that the tool holder (1) has groove-shaped recesses (5, 8), which lie on respective diametrically opposed sides and which are eccentrically arranged on a plane that is perpendicular to the longitudinal axis of the tool holder. Said groove-shaped recesses have a half-cylinder extension on each of the sides facing the longitudinal axis of the tool holder. A bolt (2, 3), whose dimensions correspond to the size of the cylinder, is located in each extension. The first bolt (2) is connected to a tapered adjusting element (9) using a double-threaded screw (11) which is positioned radially in relation to the tool holder (1).

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 has a generally parallepipedal body formed with a pair of generally rectangular, planar, and parallel side faces, a mounting formation at at least one of the side faces, a pair of opposite edge faces between the side faces and each forming at each end of the body a cutting face bounded by a cutting edge, and a respective pair of at least partially circularly arcuately concave free faces at each end extending between the respective cutting edges. The cutting edges are arcuate and each cutting edge has a convex part and straight or concave part.

Abstract: The invention concerns a cutting insert (10) for drilling. Said cutting insert (10) has a substantially rhomboid basic shape and its four cutting edges (20, 30), which each form cutting corners (15, 16), are broken, two first opposite cutting edges (20) each having cutting edge sections (21, 22) which form an obtuse angle (&egr;1) of between 140 and <180°. The two second opposite cutting edges (30) have a constriction, such that two cutting edge sections (31, 32) forming an angle (&egr;2) of >180° and 230° are produced. The invention further concerns a drill, wherein at least two of said cutting inserts are disposed on the front face of the shank, each disposed in a recess. The radially outer cutting insert has a concave active cutting edge and the radially inner cutting insert has a convex active cutting edge.

Abstract: The invention relates to a cutting insert (10) with 8 usable cutting edges and with large longitudinal surfaces, each comprising a protruding rib (20) in the center along their longitudinal axes. The cutting edges (13) defining said longitudinal surfaces form an angle of 70°<(90°−&bgr;)<90° with their respective ends and the short rounded edges (14) of the upper and lower surfaces (11, 12). According to the invention, milling tools are fitted with a plurality of such cutting inserts.

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.