Abstract: The invention relates to a cutting tool, in particular a milling tool, comprising a basic part and a head part adjoining the basic part and having a circumferential side and an end face, said basic part and head part having a common center axis and said head part comprising at least one lip having a cutting edge on the circumferential side. Said lip having a chip breaker surface adjoining the cutting edge of the circumferential side and comprising two chip breaker surface sections, the first chip breaker surface section being arranged at a first rake angle and the second chip breaker surface section being arranged at a second rake angle, said second rake angle being larger with respect to the first rake angle, and the first chip breaker surface section having an arch.

Abstract: A tool for producing a thread such as an internal thread, can include at least one cutting region having at least one cutting edge and at least one thread-forming region. In general, the cutting region(s) and the thread-forming region(s) are coupled or connected to one another in such a way that they are rotatable or rotate together about a tool axis. In addition, at least one cutting region is at least partly formed on a front-face tool end and/or adjacent to a front-face tool end. Furthermore, a front-face recess that is configured for receiving chips is formed on the front-face tool end.

Abstract: The invention relates to a drill thread milling cutter (1) for producing a bore and for the subsequent milling of a thread in the bore, said drill thread milling cutter (1) having a working region (2), on the circumference (3) of which a number of drilling and milling cutting edges are arranged. A number of milling cutting edges (7, 8, 9, 10) greater than the number of drilling cutting edges (17) by a factor greater than 2 are arranged or are effective in the direction of rotation.

Abstract: A cutting element having a first upper surface (20) and at least one lateral surface (23), whereby the lateral surface and the first upper surface meet in an edge area (24). At least one cutting edge (11 to 14) is formed on the edge area. Each cutting edge is, in essence, convexly curved with regard to a rotation axis (A) extending through the cutting element. The curvature of each cutting edge increases in a strictly monotonous manner in a predetermined direction of rotation (D) about the rotation axis.

Abstract: The tool for producing a screw thread in a workpiece comprises a) at least one thread-producing region, which comprises a1) at least one thread-milling region, which operates by removing material, as well as a2) at least one thread-forming region, which operates without the removal of material, b) such that the thread-milling region(s) and the thread-forming region(s) of each thread-producing region b1) are coupled or connected to one another in such a way that they rotate or can be rotated together about a tool axis, and b2) are disposed along an outside circumference of the thread-producing region so as to be offset from one another, i.e. situated one behind the other or following one another, in a direction of rotation about the tool axis.

Abstract: Implementations of the present invention include a thread-rolling tap, which is designed and intended for the non-cutting finishing of a previously created thread, in particular internal thread. For example, one implementation of such a tool includes at least one thread-forming portion that rotates about a tool axis, the thread-forming portion having multiple forming wedges. The forming wedges in cross-section include two flanks that diverge from one another beginning at a forming wedge tip. The forming wedge tip can be shaped as any of an acute angle, a rounded region, or a flattened region. At least one of the two flanks also include at least one expansion for positioning the forming wedge in the previously created thread. Additional implementations of the invention relate to a methods of manufacturing such a tool, as well as to methods of creating a thread.

Abstract: A thread milling or cutting tool (1) comprises a carrier piece (2) rotatable around an axis of rotation (D), at least one cutting element (3, 3′, 3″, 3′″) releasably attachable or attached on the carrier piece (2), and at least one fastening element (4, 4′, 4″, 4′″) releasably attachable or attached on the carrier piece (2), wherein at least one cutting element (3, 3′, 3″, 3′″) has no hole for attachment by means of a fastening screw, but is positively and/or non-positively attachable or attached between the carrier piece (2) and at least one fastening element (4, 4′, 4″, 4′″) and/or between at least two fastening elements.

Abstract: A thread rolling tap including a stem portion, and a thread forming portion having a body with a plurality of thread turns formed on the body and including a front entrance region and a guide region, with the thread turns having each, in the front region in vicinity of the body, inclined pressure flanks forming side surfaces of an acute angle and connected by an outer, arranged radially outwardly with respect to the body, pressure surface formed as a flattening having opposite rounded edges extending along a circumference of a respective thread turn.

Abstract: A method of rotational milling of a thread on a workpiece and including providing a device having a rotatable workpiece spindle for supporting the workpiece and a rotatable milling cutter spindle for supporting a thread milling cutter, and displacing axially the workpiece spindle and the milling cutter relative to each other by a distance shorter than a length of the thread, while rotating the workpiece spindle and the milling cutter spindle with respective rotational speeds a ratio of which is not equal to 1; and displacing radially the workpiece spindle and the milling cutter spindle relative to each other.

Abstract: A thread rolling tap including a stem portion, and a thread forming portion having a body with a plurality of thread turns formed on the body and including a front entrance region and a guide region, with the thread turns having each, in the front region in vicinity of the body, inclined pressure flanks forming side surfaces of an acute angle and connected by an outer, arranged radially outwardly with respect to the body, pressure surface formed as a flattening having opposite rounded edges extending along a circumference of a respective thread turn.

Abstract: A thread-cutting chuck for CNC machine technology of rigid tapping, with a clamping means held in a chuck shaft, particularly a collet chuck, for the tap, an accommodating part, which is held in the chuck shaft without clearance in the direction of rotation and, in the axial direction in the tension and compression directions, has a slight axial clearance cushioned by elastomeric connections disposed between the clamping means and the shaft of the chuck.

Abstract: There is a tap whose thread portion 2 forms a cutting section 5 and a guiding section 6 and is provided on a plurality of adjacent thread teeth of the cutting section 5 with a relief 8. It is desirable that a further machining measure be provided for the tap whereby favorable compromises can be obtained with respect to guidance and friction. This is achieved in that the relief 8 of the adjacent cutting-section 5 thread teeth--seen in a longitudinal direction--have a clearance angle which varies increasingly or decreasingly. Varying the relief enables the requirements with respect to avoiding incorrect tapping and avoiding friction-generated cold welding to be met and matched up in an improved manner.

Abstract: There is a tap having a tapered threaded portion 2 whose thread teeth 4 located in the tapered section are provided with a relief arranged at a clearance angle. It is desirable that the cutting moment and friction should decrease to the back towards the greater diameter. This is achieved in that the clearance angle of the thread teeth 4 in the tapered section 2 remains constant or increases towards the back. A simple machining measure permits the cutting moment and friction to be variably controlled over a wide range.

Abstract: A clamping device for workpieces or tools with a high concentricity utilizes a shank part supported in a cylindrical borehole of a base body, and an adjusting device disposed in the support area of the shank part includes several tapped holes, especially tapered tapped holes in the base body, which are distributed in a radial plane, as well as tapered bolts which can be screwed into the tapped holes.

Abstract: Chuck apparatus for workpieces or tools with a base body provided with a cylindrical borehole and a concentrically thereto arranged cylindrical clamping sleeve of variable size with internal and external annular recessed grooves displacedly arranged relative to each other in the axial direction as well as a tightening nut or the like acting axially upon the clamping sleeve axially supported on a front end of the opposite side, whereby at least the clamping sleeve's end located remotely from the tightening nut or the like is configured as a taper sleeve acting in conjunction with a counter taper.

Abstract: A workpiece or a tool which is clamped co-axially to a circular base by interposing a deformable sleeve between the base and the workpiece or tool. The sleeve is then deformed to clamp the two members together. When the members are assembled before deformation of the sleeve, there is a clearance between the sleeve and one of the members, this clearance being largest at the end where the deformation force is applied. The sleeve has mutually offset inner and outer radial recesses, and similarly offset inner and outer clamping base points.