Abstract: The invention relates to a drilling tool for machine tools has a drill body, a cutting head arranged on the front face of the drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

Abstract: A device for connecting two components (10, 14), for example two tool parts. The first component (10) has a cylindrical locating pin (12) and an annular face (22) projecting radially beyond this locating pin (12), while the second component (14) has a cylindrical locating bore (16) for receiving the locating pin (12) and an annular face (24) surrounding the locating bore (16). Also provided is a clamping mechanism (18), which ensures during the clamping operation that the locating pin (12) is drawn into the locating bore (16) and at the same time the annular faces (22, 24) are pressed against one another.

Abstract: The invention relates to a machining center for work piece machining. The machining center comprises a machine frame, a machine spindle driven by a motor and rotatably arranged on the machine frame, and a group of machine tools that can be exchanged on the machine spindle. The machine tools comprise a coupling shaft that is compatible with a holder of the machine spindle. Furthermore, a rotary transmitter for electric energy is provided, having a stator fixed to the machine in a stationary manner and a rotor rotating along with the machine spindle. It is claimed as novel that the rotary transmitter comprises at least two transmission paths for electric energy which can be selected according to the electric power to be transmitted and the rotational speed of the spindle to be set and which can be activated in the coupled state of the machine tool.

Abstract: The invention relates to a drilling tool for machine tools has a drill body, a cutting head arranged on the front face of the drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

Abstract: A drilling tool for machine tools has a drill body, a cutting head arranged on the front face of the drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

Abstract: A drilling tool for machine tools has a drill body and a cutting head arranged on the front face of the drill body. The drill body has at least two chip flutes, which are delimited at their flanks by ribs and at least one of which is spirally curved. Arranged in the ribs of the drill body are coolant channels, which have an outlet opening at the end of the drill body on the cutting head side. A special feature is that the outlet openings are arranged within each one of the chip flutes and communicate with one of the coolant channels arranged in the ribs by way of a straight channel endpiece.

Abstract: The invention relates to a device for connecting two components (10, 14), for example two tool parts. The first component (10) has in this case a cylindrical locating pin (12) and an annular face (22) projecting radially beyond this locating pin (12), while the second component (14) has a cylindrical locating bore (16) for receiving the locating pin (12) and an annular face (24) surrounding the locating bore (16). Also provided is a clamping mechanism (18), which ensures during the clamping operation that the locating pin (12) is drawn into the locating bore (16) and at the same time the annular faces (22, 24) are pressed against one another.

Abstract: The invention relates to a machining center for work piece machining. The machining center comprises a machine frame, a machine spindle driven by a motor and rotatably arranged on the machine frame, and a group of machine tools that can be exchanged on the machine spindle. The machine tools comprise a coupling shaft that is compatible with a holder of the machine spindle. Furthermore, a rotary transmitter for electric energy is provided, having a stator fixed to the machine in a stationary manner and a rotor rotating along with the machine spindle. It is claimed as novel that the rotary transmitter comprises at least two transmission paths for electric energy which can be selected according to the electric power to be transmitted and the rotational speed of the spindle to be set and which can be activated in the coupled state of the machine tool.

Abstract: The invention relates to a drilling tool for machine tools. The drilling tool comprises a drill body, a cutting head arranged on the front face of said drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A special feature of the invention is that a second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

Abstract: The invention relates to a drilling tool for machine tools comprising a drill body and a cutting head arranged on the front face of the drill body. The drill body has at least two chip flutes, which are delimited at their flanks by ribs and at least one of which is spirally curved. Arranged in the ribs of the drill body are coolant channels, which have an outlet opening at the end of the drill body on the cutting head side. A special feature is that the outlet openings are arranged within each one of the chip flutes and communicate with one of the coolant channels arranged in the ribs by way of a straight channel endpiece.

Abstract: A device for coupling two parts includes a first part having a cylindrical adapting journal and a radial flat surface which limits the adapting journal by the base thereof and being radially protruded, and a second part having a receiving sleeve with a cylindrical internal surface. A clamping device, during clamping, enables the adapting journal to be inserted into the receiving sleeve and to be pressed thereto between the flat surface and a front surface. In order to guarantee an exact centering of the parts with the aid of simple means, the inventive receiving sleeve is provided with a lower conical part diverging from the internal cylindrical surface towards the front surface and the adapting journal is provided with an elastically deformable centering ring which is arranged at the level of the base and is provided with an external conical part complementary to the lower conical part.

Abstract: The tensioning mechanism (18) comprises a clamp bolt (28), arranged in a displaceable manner in a transverse bore (26) in the fitting plug (12) and two diametrically opposed retainers (34, 36) in the second component (14) which engage with an axially facing internal or external cone against a complementary internal or external cone on the clamp bolt (28) and, during tensioning, are tensioned with the same in a wedge fashion. According to the invention, the clamp bolt (28) comprises a frustum-shaped external cone (40), the base diameter of which is smaller than the diameter of the guide surface (62) thereof in the transverse bore (26).

Abstract: The tensioning mechanism (18) comprises a clamp bolt (28), arranged in a displaceable manner in a transverse bore (26) in the fitting plug (12) and two diametrically opposed retainers (34, 36) in the second component (14) which engage with an axially facing internal or external cone against a complementary internal or external cone on the clamp bolt (28) and, during tensioning, are tensioned with the same in a wedge fashion. According to the invention, the clamp bolt (28) comprises a frustum-shaped external cone (40), the base diameter of which is smaller than the diameter of the guide surface (62) thereof in the transverse bore (26).

Abstract: A clamping mechanism connects a tool head including a hollow tool shank with a clamping shank having a seat for receiving the tool shank. Each of the face ends of the clamping elements of the clamping mechanism are overlapped by at least one centering element. The centering elements are connected to each other by axially parallel links forming a centering cage that overlaps the clamping mechanism with axial play. The centering elements each lock into an axially central, cylindrical recess situated in the floor area of the clamping shank and the hollow tool shank.

Abstract: A drilling tool includes a tool head having at least one chip groove and a tool shank. A slotted sleeve is placed on the tool shank and closely surrounds the chip groove. The edges adjacent the slot lie on solid material of the tool shank. The chip grooves and the sleeve form channels for carrying away the chips removed at the workpiece machining base. Owing to the slot, the sleeve can be gently spread apart and pushed onto the tool shank from the end having the enlarged tool head.

Abstract: A device for machining of workpieces or objects, comprises an elongated tool which rotates about its longitudinal axis and is provided with a shaft which can be coupled to a drive unit and with a chip-removing head connected to the shaft. In order to ensure that even a very long tool can be used in deep hollows in the workpiece in a stable and vibration-free way, a sleeve positioned between the shaft and the chip-removing head is connected at one end to the chip-removing head so that it cannot slide or rotate. The tool can be clamped in the chuck of a hand-held drive unit, preferably with a suction and flushing device connected in series, and used to suck away chips through the cavity in the sleeve and to pump cooling fluid onto the cutting site.

Abstract: A tool head for use in machine tools has an adjustable slide (18) capable of moving with respect to the base body (10) transversely to its axis of rotation (12) and of being provided with a tool holder, as well as a device (30) for direct measurement of the travel of the slide (18). The measurement device (30) has two substrate plates (32, 34) upon whose facing surfaces are arranged the capacitive measurement structures of a measuring scale and of a sensor. The substrate plates (32, 34) are arranged in eccentric tangential planes parallel to the axis of rotation. The radially inner substrate plate is surface-linked to a bearing surface of the slide (18), whereas the radially outer substrate plate is surface-supported by the bearing surface (62), capable of forming a support after surface material removal, of a bearing strip (56) that can be detachably inserted into a radial window cutout (54) of the base body (10, 36).

Abstract: The device of the invention has a supporting body detachably fixed to a machine spindle, a head element detachably fixed to the supporting body, and at least one slide which can be moved substantially at right angles to the axis of rotation of the head element and which carries a tool or tool carrier. The radial motion of the slide is produced by the action of an axially moving actuator rod and gear means. In addition, there is in the supporting body a coolant channel for hydraulic fluid. The inlet end of the channel is connected to an opening in the spindle and the outlet opens out in the head element. For the operation of the slide, the supporting body has two cylindrical bores disposed coaxial to the axis of rotation and a certain distance apart and in which two rigidly linked pistons are located which can be connected to the actuator rod.