Abstract: A drilling tool for producing a bore with a cylindrical inner wall can be rotatable in a rotary movement with a predetermined rotational direction (VD) about a tool axis (A) extending through the drilling tool, and at the same time is movable in an axial forward movement (VB) in a forward direction axially to the tool axis. The drilling tool comprises at least one drilling area (3) arranged in a forwardly located region of the drilling tool at a forward or free end, but preferably not having a thread forming region. The drilling area has a number n of drilling edges which are arranged offset to each other in the rotational direction, and at least one chip divider is arranged on at least one or each of the n drill cutting edges, where the chip divider forms an interruption of the respective drill cutting edge.

Abstract: A tool for the chipless production of a thread in a workpiece comprises at least one shaping region which can be rotated about a tool axis (A) for the chipless production or finishing of the thread. The shaping region comprises a plurality of pressing lobes projecting radially outwardly from the tool axis (A) for producing the thread by pressing the pressing lobes into the workpiece surface. The pressing lobes are successively arranged along a forming curve which substantially spirals around the tool axis (A), and the pitch of the forming curve essentially corresponds to the pitch of the thread to be produced or reworked. The forming curve has a helix angle (a), and a profile of at least one pressing lobe is designed in such a way that a thread produced in an axial section containing the tool axis is at least in sections round-arched or ogival.

Abstract: A tool and related method for the non-cutting production or reworking of a thread in/on a workpiece comprises a forming area which is rotatable about a tool axis (A), the forming area having a plurality of pressing lobes protruding or projecting radially outwards away from the tool axis (A) for producing or post-reworking the thread by pressing the pressing lobes into the workpiece surface. The pressing lobes are arranged in succession along a shaping curve which substantially spirally encircles the tool axis (A), and the pitch of the shaping curve corresponds substantially to the pitch of the thread to be produced or reworked. The pressing lobes form at least one pressing ridge, wherein adjacent to the at least one pressing ridge a flaring ridge with a lower height HB than the height of the pressing ridge HD is formed.

Abstract: The invention relates to a tool for forming a drilled hole (B), comprising a shank that is rotatable or rotates about a tool axis (A), at least one first portion, which is rotatable or rotates about the tool axis (A), for producing and/or widening a drilled hole (B) by chip cutting, and a second portion, which rotates about the tool axis (A), for widening a drilled hole (B) without chip cutting, wherein the second portion is arranged behind the first portion in a direction of advance (V) of the tool. The invention additionally relates to a method for producing a drilled hole (B).

Abstract: A thread forming tool comprises a thread generating region that extends along a helical line with a thread pitch angle and a thread direction of the thread to be formed and has an active profile corresponding to the thread profile of the thread to be formed, wherein the thread generating region has a thread tooth having a thread profile with a front thread tooth profile flank and a rear thread tooth profile flank, has a front flank relieved surface, adjoining the front thread tooth profile flank and has a rear flank relieved surface, adjoining the rear thread tooth profile flank, wherein the front flank relieved surface is isolated relative to a front thread tooth flank envelope, wherein the rear flank relieved surface is displaced relative to a rear transverse plane wherein the helical line is inclined to the rear relative to the rear transverse plane by the thread pitch angle.

Abstract: A method for forming a thread with a predefined thread pitch and with a predefined thread profile in a workpiece, in which a tool is used, wherein, during working movement, a thread generating region forms a thread, wherein the tool is moved during a second working phase further into the workpiece in the same forwards direction as in the working movement, as far as a reversal point, wherein the decelerating movement comprises a rotational movement in the same rotational direction as in the working movement, wherein during the decelerating movement, the axial feed movement is controlled in dependence on the rotational angle of the rotational movement of the tool and wherein the axial feed of the tool during a complete revolution, is smaller in terms of amount than the thread pitchat least during part of the decelerating movement and is zero at the reversal point.

Abstract: This invention relates to a screw tap which is rotatable about a rotational axis and has a number of thread-cutting teeth, which respectively have a radially outer tip cutter and are disposed mutually offset, with a predefined thread pitch, in an arrangement running spirally or helically around the rotational axis. In a lead region adjoining one end of the screw tap axially to the rotational axis, the maximum radial distance of the tip cutters of the thread-cutting teeth from the rotational axis increases with increasing axial distance of the tip cutters from one end of the screw tap according to a predefined radial distance function. At least some of the thread-cutting teeth in the lead region, at least in the region of the tip cutters, respectively have a defined cutter rounding between tool face and tool flank.

Abstract: The invention relates to a modular drill including a shank part with an end side. A cutting part can be connected to the shank part at its end side. The shank part has at least one torque transmission element which projects on the end side and has at least one torque transmission face for transmitting a torque in the rotational direction from the shank part to the cutting part. The cutting part has at least one torque receiving region for receiving the torque. The at least one torque receiving region has at least one torque receiving face which corresponds with the torque transmission face. The cutting part has at least one centering element for radially centering the cutting part in relation to the shank part. The cutting part is clamped to the shank part via a clamping element which acts at least predominantly in the axial direction.

Abstract: A tool holder has a first holder part for inserting into a receptacle in the machine tool and a second holder part for holding a tool. The tool holder has a conduit for directing a coolant and/or lubricant to the tool from a coolant and/or lubricant source. The tool has a conduit section for the coolant and/or lubricant for directing the latter to a machining point, and wherein, in the fitted state of the tool in the tool holder, the conduit is in contact with the conduit section at a coupling point. Provision is made for there to be an air feed line which directs compressed air from a compressed-air source into the region of the coupling point in such a way that the compressed air acts on the outer circumferential surface of the conduit and of the conduit section. Furthermore, methods for operating such a tool holder are described.

Abstract: The invention relates to a tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right.

Abstract: A tool holder has a first holder part for inserting into a receptacle in the machine tool and a second holder part for holding a tool. The tool holder has a conduit for directing a coolant and/or lubricant to the tool from a coolant and/or lubricant source. The tool has a conduit section for the coolant and/or lubricant for directing the latter to a machining point, and wherein, in the fitted state of the tool in the tool holder, the conduit is in contact with the conduit section at a coupling point. Provision is made for there to be an air feed line which directs compressed air from a compressed-air source into the region of the coupling point in such a way that the compressed air acts on the outer circumferential surface of the conduit and of the conduit section. Furthermore, methods for operating such a tool holder are described.

Abstract: The invention relates to a modular drill including a shank part with an end side. A cutting part can be connected to the shank part at its end side. The shank part has at least one torque transmission element which projects on the end side and has at least one torque transmission face for transmitting a torque in the rotational direction from the shank part to the cutting part. The cutting part has at least one torque receiving region for receiving the torque. The at least one torque receiving region has at least one torque receiving face which corresponds with the torque transmission face. The cutting part has at least one centering element for radially centering the cutting part in relation to the shank part. The cutting part is clamped to the shank part via a clamping element which acts at least predominantly in the axial direction.

Abstract: The invention relates to a method for generating a thread by a numerically-controlled tool machine (or: machine tool) using a thread generation tool, the thread generation tool being rotated by a tool spindle and simultaneously advanced according to the thread pitch in the axial direction, in order to generate a thread in a borehole of a workpiece. In order to increase the working velocity of the thread generation, the invention provides that the rotational velocity (?1) of the thread generation tool is geared up using a transmission gearing, which is situated so it is active between tool spindle and thread generation tool, in relation to the rotational velocity (?2) of the tool spindle. Furthermore, the invention relates to a numerically-controlled machine tool.

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: A method for gaging a thread can include gaging at least one preliminary thread using a preliminary gage (e.g., a preliminary go gage, and/or a preliminary no go gage). The preliminary thread can be produced in a first step by removing material from the workpiece. The at least one preliminary thread has a preliminary thread profile, and the preliminary thread gage is adapted to the preliminary thread profile. In addition, the method can involve gaging a final thread using a final-thread gage (e.g., a preliminary final-thread go gage and/or a final-thread no-go gage). The final thread can be formed in a second step by plastic pressing-in of the material of the workpiece at least in a section of the preliminary thread profile using at least one thread-forming profile. The final thread has a final thread profile, and the final-thread gage can be adapted to the final thread profile.

Abstract: A method for gaging a thread can include gaging at least one preliminary thread using a preliminary gage (e.g., a preliminary go gage, and/or a preliminary no go gage). The preliminary thread can be produced in a first step by removing material from the workpiece. The at least one preliminary thread has a preliminary thread profile, and the preliminary thread gage is adapted to the preliminary thread profile. In addition, the method can involve gaging a final thread using a final-thread gage (e.g., a preliminary final-thread go gage and/or a final-thread no-go gage). The final thread can be formed in a second step by plastic pressing-in of the material of the workpiece at least in a section of the preliminary thread profile using at least one thread-forming profile. The final thread has a final thread profile, and the final-thread gage can be adapted to the final thread profile.

Abstract: In order to produce a thread in a workpiece, a preliminary thread can be produced in the workpiece in at least one first working step by removing material from the workpiece. The preliminary thread profile of the workpiece (from which material was removed) has two preliminary thread flanks and a preliminary thread root connecting the two preliminary thread flanks. In addition, a preliminary thread profile that has a final thread having a final thread profile is produced in at least one second working step by plastic pressing-in of the material of the workpiece at least in a section of at least one of the two preliminary thread flanks by a predetermined or predeterminable pressing-in volume.

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.