A clamping device for a tool or workpiece has a draw-in collet and a coupling element. The clamping device has first and second bayonet closures with which the draw-in collet can be locked and braced against the coupling element. The first and second bayonet closures are brought into engagement at the same time, as a result of which the draw-in collet is locked against the coupling element using the first bayonet closure, and the draw-in collet is braced against the coupling element using the second bayonet closure. First, the draw-in collet is pushed into the coupling element with partial actuation of the bayonet closures. Then the draw-in collet is rotated relative to the coupling element with a further partial actuation of the bayonet closures, and finally the draw-in collet is withdrawn to thereby lock the first bayonet closure and to brace the second bayonet closure.

A changer device for a clamping head having a base and pivoting elements pivotably articulated on the base and which in each case possess at least one engagement portion for impinging clamping jaws of the clamping head with a force. The changer device has a coupling transmission which per pivoting element possesses at least one coupling tab attached so as to be pivotably movable on the respective pivoting element. The changer device has a handle which for the purpose of simultaneous repositioning of the pivoting elements in relation to the base is movable in a relative manner. The handle is locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of the coupling tab and indirectly causes pivoting of the further coupling tab such that a pivoting movement of the pivoting elements and the engagement portions is caused.

The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves. On account of preferably spirally arranged locking grooves along the cylindrical shank of rotary tools, the direction of pitch of which grooves corresponds to the direction of the grooves of the tool, axial locking of the tool is obtained, so that the tool cannot be axially displaced from the tool holder during operation. In addition, force-exerting elements are arranged, with the effect of making the tool lie against the pull-out preventer without play after shrink-fitting.

A cutting machine for machining a bar stock that includes at least one cutting tool, a headstock, and a bushing assembly connected to the headstock. The bushing assembly includes a guide member that includes a body having at least one bore therein and at least one guide mating feature. The bushing assembly further includes a sleeve removably inserted within the at least one bore of the body of the guide member. The sleeve includes a body having a bore therein and at least one sleeve mating feature. The bore of the sleeve is configured for supporting and holding the bar stock. The at least one sleeve mating feature is engaged with the at least one guide mating feature for retaining the sleeve within the guide member.

The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves. On account of preferably spirally arranged locking grooves along the cylindrical shank of rotary tools, the direction of pitch of which grooves corresponds to the direction of the grooves of the tool, axial locking of the tool is obtained, so that the tool cannot be axially displaced from the tool holder during operation. In addition, force-exerting elements are arranged, with the effect of making the tool lie against the pull-out preventer without play after shrink-fitting.

A clamping system for machine tools includes a body portion configured to be received in a holding fixture of a machine, a tool holder integrally formed with and extending longitudinally from the body portion, the tool holder having a mounting mechanism on a distal end thereof for receiving a cutting tool, at least one fluid delivery vein extending through the tool holder from the body portion to the distal end of the tool holder, and at least one outlet at the distal end of the tool holder, the at least one outlet being configured to direct a fluid from the at least one fluid delivery vein toward at least one of the cutting tool and a workpiece.

A machining apparatus capable of drilling a long workpiece from an end surface of a diameter-expanded part and drilling a short workpiece from an end surface of a stem part without inverting orientation of a collet and a sleeve in a chuck device is provided, as well as a method of using the same, and a chuck device for the machining apparatus. A deep hole drilling machine and a chuck device are included with a sleeve and a collet included inside the chuck device, and the collet and the sleeve each have both end openings opened toward the outside of the chuck device. The opening on one end side of each of the sleeve and the collet is directed to the deep hole drilling machine, and the collet is disposed on the other end side of the sleeve.

A changer device for a clamping head having a base and pivoting elements pivotably articulated on the base and which in each case possess at least one engagement portion for impinging clamping jaws of the clamping head with a force. The changer device has a coupling transmission which per pivoting element possesses at least one coupling tab attached so as to be pivotably movable on the respective pivoting element. The changer device has a handle which for the purpose of simultaneous repositioning of the pivoting elements in relation to the base is movable in a relative manner. The handle is locationally fixed in relation to one of the coupling tabs such that a pivoting movement of the handle directly causes pivoting of the coupling tab and indirectly causes pivoting of the further coupling tab such that a pivoting movement of the pivoting elements and the engagement portions is caused.

A machining apparatus capable of drilling a long workpiece from an end surface of a diameter-expanded part and drilling a short workpiece from an end surface of a stem part without inverting orientation of a collet and a sleeve in a chuck device is provided, as well as a method of using the same, and a chuck device for the machining apparatus. A deep hole drilling machine and a chuck device are included with a sleeve and a collet included inside the chuck device, and the collet and the sleeve each have both end openings opened toward the outside of the chuck device. The opening on one end side of each of the sleeve and the collet is directed to the deep hole drilling machine, and the collet is disposed on the other end side of the sleeve.

A colleted bushing includes a collet and a bushing. The collet has a collet proximal end and a collet bore having collet threads. In addition, the collet has a collet bore taper located adjacent the collet proximal end, and a plurality of collet fingers located adjacent the collet proximal end and configured to be inserted into a workpiece hole of a workpiece. The bushing has a bushing proximal end, a bushing bore, a bushing outer surface, and bushing threads formed along a section of the bushing outer surface. The bushing is configured to be inserted into the collet bore and the bushing threads are configured to engage the collet threads in a manner resulting in movement of the bushing proximal end into contact with the collet bore taper causing the collet fingers to be urged radially outwardly and removably locking the collet within the workpiece hole.