Abstract: A thread rolling head comprises a bearing unit, in which at least two profile rollers, preferably at least three profile rollers, are rotatably mounted, and a shank section coupled to the bearing unit. Adjacent profile rollers delimit an insertion section into which a workpiece to be machined can be inserted. The bearing unit is built from at least two modules each forming a functional unit, wherein the modules each have a fastener through which modules can be connected together and can be exchanged for other modules also each forming a functional unit. One of the modules has fasteners for connecting to corresponding fasteners of the shank section.

Abstract: The invention relates to a drilling tool with a base, having a central axis of rotation, and a drill bit, detachably connected to the base. The drill bit has a coupling part, which can be coupled with a coupling receptacle on the face of the base and has at least two convexly curved centring portions, which are arranged such that they are distributed over the circumference and engage with an exact fit in complementary concavely curved centring portions of the coupling receptacle. The coupling part has a complementary driver stop, meshing with a rotary driver of the coupling receptacle. It is claimed as novel that the centring portions of the coupling part and/or of the coupling receptacle have clamping surfaces, which run onto each other in the manner of a rotary wedge until the driver stop and the rotary driver come up against each other counter to a predetermined direction of rotation.

Abstract: A rotating machine tool has a base with a rotating axis, at least one pocket formed in the base and at least one blade support holding a cutting plate. Two side surfaces of the blade support sit against a side support surface, respectively, the blade support side surfaces making an angle between them, and the base of the blade support sits against a base support surface of the pocket, the blade support being clamped in the pocket removably by way of a clamp element. The cutting plate protrudes over the blade support with an effective blade and over the base outward.

Abstract: An indexable insert for solid drills has four identical cutting edges (30) arranged at a distance above a supporting base (42) and each extending between two cutting-edge corners (28?, 28?). The cutting edges are each bounded by a cutting face (46) and a clearance face (48), with the inclusion of a wedge angle (b). Of the cutting edges (30), one in each case is in an active operating position during the drilling operation. To permit optimum adaptation to the cutting conditions and drilling characteristics, varying over the length of the cutting edge of the drilling tool, it is proposed according to the invention that the height (h) of the four cutting edges (30), measured from the plane of the supporting base (42), and/or the clearance angle (a) varies over the length of the respective cutting edges (30).

Abstract: The invention relates to a rotating cutting tool, in particular a boring tool for use in machine tools. The cutting tool comprises at least one cutting insert, designed as an indexable insert, that has an active main blade located near a corner of the insert, the outer end of said blade defining a circular flight path radius (R) as the blade rotates, said blade penetrating into a work piece at a pre-determined cutting depth (t) near a pre-formed round hole. Also provided is a secondary blade that is disposed opposite to an advancing direction and that aligns with the outermost end of the main blade, the entire length of said blade having a smaller radius than the circular flight path radius (R) of the main blade, wherein a secondary blade free surface aligns with the secondary blade opposite to the direction of rotation.

Abstract: A junction between two components of a tool system, that rotates about an axis of rotation, includes a conical seat, on the first component, coaxial to the axis of rotation and which is defined by an annular front face. The second component carries a coupling having a conical surface complementary to the conical seat and an annular end face resting against the front face. A tie bolt axially projects beyond the free end of the coupling pin and engages, in a cavity adjacent to the seat. The junction also has tensioning elements that are actuated from the exterior for mutually bracing the components, which are radially guided in the first component, and which act upon the tie bolt and are functionally linked with joint actuating means for adjustment between detached and tensioned positions. The tensioning elements include ejection portions that can be fitted with a rotatably received rolling element.

Abstract: A junction between two components of a tool system, that rotates about an axis of rotation, includes a conical seat, on the first component, coaxial to the axis of rotation and which is defined by an annular front face. The second component carries a coupling having a conical surface complementary to the conical seat and an annular end face resting against the front face. A tie bolt axially projects beyond the free end of the coupling pin and engages, in a cavity adjacent to the seat. The junction also has tensioning elements that are actuated from the exterior for mutually bracing the components, which are radially guided in the first component, and which act upon the tie bolt and are functionally linked with joint actuating means for adjustment between detached and tensioned positions. The tensioning elements include ejection portions that can be fitted with a rotatably received rolling element.

Abstract: The invention relates to a machine tool with an adjustable cutting plate. The rotating machine tool substantially comprises a base member with a rotating axis, at least one pocket formed in the base member and at least one blade support holding a cutting plate. Two side surfaces of the blade support sit against a side support surface, respectively, said blade support side surfaces making an angle between them, and the base of the blade support sits against a base support surface of the pocket, the blade support being clamped in the pocket removably by way of a clamp element. The cutting plate protrudes over the blade support with an effective blade and over the base member outward.

Abstract: The invention relates to a rotating cutting tool, in particular a boring tool for use in machine tools. The cutting tool comprises at least one cutting insert, designed as an indexable insert, that has an active main blade located near a corner of the insert, the outer end of said blade defining a circular flight path radius (R) as the blade rotates, said blade penetrating into a work piece at a pre-determined cutting depth (t) near a pre-formed round hole. Also provided is a secondary blade that is disposed opposite to an advancing direction and that aligns with the outermost end of the main blade, the entire length of said blade having a smaller radius than the circular flight path radius (R) of the main blade, wherein a secondary blade free surface aligns with the secondary blade opposite to the direction of rotation.

Abstract: The invention relates to a drilling tool with a base, having a central axis of rotation, and a drill bit, detachably connected to the base. The drill bit has a coupling part, which can be coupled with a coupling receptacle on the face of the base and has at least two convexly curved centring portions, which are arranged such that they are distributed over the circumference and engage with an exact fit in complementary concavely curved centring portions of the coupling receptacle. The coupling part has a complementary driver stop, meshing with a rotary driver of the coupling receptacle. It is claimed as novel that the centring portions of the coupling part and/or of the coupling receptacle have clamping surfaces, which run onto each other in the manner of a rotary wedge until the driver stop and the rotary driver come up against each other counter to a predetermined direction of rotation.

Abstract: The invention relates to a machine tool for use in tool machines, comprising a cutting element which is preferably configured as a cutting ring and at least two insert seats that are provided in the cutting element at distance to each other in the circumferential direction. The insert seats are fitted with at least one group of at least two identical insert tips that are detachably arranged therein and that have one working edge each, the effective working edges of the insert tips of one group being cut to the same nominal size. The insert tips are configured as indexable inserts, every single indexable insert of a group being associated with a defined insert seat in all possible positions of adjustment, and the indexable inserts of a group having at least two working edges each, one of these edges being always in the effective and at least one other edge being in the ineffective position, depending on the position of the indexable inserts in the associated insert seats.

Abstract: The invention relates to a junction (14) between two components (10, 12) of a tool system that rotates about an axis of rotation (16), especially for use in machine tools. The junction (14) comprises an at least partially conical seat (18), arranged on the first component (10), which is coaxial to the axis of rotation (16) and which is defined by at least one annular front face (20). The second component (12) carries a coupling part (22) which comprises a coupling pin (24) having a conical surface (32) that is complementary to the conical seat (18) and an annular end face (26) pointing towards the annular front face (20) and, in the coupled state, resting against the same. A tie bolt (36) axially projects beyond the free end of the coupling pin (24) and engages, in the coupled state, in a cavity (38) that is adjacent to the seat (18). The junction also has tensioning means that can be actuated from the exterior for mutually bracing the components (10, 12).

Abstract: The invention relates to an indexable insert for solid drills comprising four identical cutting edges (30) arranged at a distance above a supporting base (42) and each extending between two cutting-edge corners (28?, 28?). The cutting edges are each bounded by a cutting face (46) and a clearance face (48), with the inclusion of a wedge angle (b). Of the cutting edges (30), one in each case is in an active operating position during the drilling operation. To permit optimum adaptation to the cutting conditions and drilling characteristics, varying over the length of the cutting edge of the drilling tool, it is proposed according to the invention that the height (h) of the four cutting edges (30), measured from the plane of the supporting base (42), and/or the clearance angle (a) varies over the length of the respective cutting edges (30).

Abstract: A tool includes a shaft and a blade support which is disposed in a removable manner on the face of the shaft, preferably embodied as a drill bit. One end of the blade support is provided with a transversal rib that extends beyond an end face. It can be inserted into an accommodating device of the shaft, which is delimited by a planar counterface, and can be clamped by clamping screws. In order to ensure sufficient torque transmission even with small bore diameters, the accommodating device is provided with two entraining sections that are separated by a central gap, are disposed in a twofold rotationally symmetric manner relative to the tool axis, and protrude from the counterface of the shaft essentially parallel to the axis. Each entraining section encompasses an axially parallel entraining area for an adjacent transversal rib section, which points in the direction of rotation of the shaft.

Abstract: The invention relates to a tool comprising a shaft and a blade support (12) which is disposed in a removable manner on the face of the shaft (10) and is preferably embodied as a drill bit. One end of the blade support (12) is provided with a transversal rib (32) that extends beyond an end face (30), can be inserted into an accommodating device (40) of the shaft (10), which is delimited by a planar counterface (62), and can be clamped by means of clamping screws (72). In order to ensure sufficient torque transmission even with small bore diameters, the accommodating device is provided with two entraining sections (64?, 64) that are separated by means of a central gap (60), are disposed in a twofold rotationally symmetric manner relative to the tool axis (13), and protrude from the counterface (62) of the shaft (10) essentially parallel to the axis.

Abstract: The tool has a tool shank (which may be hollow) (14), whilst the machine spindle has a connecting sleeve (20) containing a recess (18) to accommodate the tool shank. A clamping mechanism (22) is located in the area between the tool shank (14) and the connecting sleeve (20). This mechanism has at least one clamping element (24″), with radial movement, which acts as a wedge drive, providing axial clamping movement between the tool shank (14) and connecting sleeve (20). The clamping mechanism comprises an actuating nut (26), which screws onto an exterior thread (28) on the connecting sleeve (20) and is coaxial in relation to the spindle axis. During the clamping procedure, the axial movement of the actuating nut can be converted into the radial movement of the clamping element (24″), with the help of at least one connecting link (30″).