Abstract: A punch head assembly that includes a punch head including a main body having opposite first and second ends, a longitudinal inner bore, a first passageway extending substantially radially from the inner bore, and a second passageway substantially traversing the first passageway. A ball bearing is received in the first passageway. A pin member is received in the second passageway. The pin member is rotationally movable between first and second positions. A driver is coupled to the punch head and includes a stem extending into the inner bore. The stem has an outer ball engagement surface. The punch head is axially movable with respect to the stem. Axial movement of the pin member in the second passageway moves the ball bearing into and out of engagement with the outer ball engagement surface for adjusting an axial position of the punch head with respect to the driver.

Abstract: A tool coupling includes a first member, having a male coupling portion extending along a first axis, and a second member, having a female coupling portion extending along a second axis. The male coupling portion has front and rear drive members defining male front and rear footprints in respective first and second transverse mating planes. The female coupling portion has front and rear drive passages defining front and rear peripheral profiles in respective first and second transverse passage planes. The front and rear drive members respectively occupy the front and rear drive passages, and at least one of the front and rear drive members prevents rotation of the second member about the second axis. On imaginary rotation of the front peripheral profile by any angle about the second axis and axial projection thereof, the front peripheral profile overlaps (i.e., at least partially crosses) the rear footprint.

Abstract: To provide a hand stocker with a simple structure. A hand stocker housing a hand for attaching on an actuator includes a housing board that houses the hand in a hung state and includes a hanging mechanism hanging the hand on a board surface facing the hand. The hanging mechanism includes: a hooking member that extends in a horizontal direction from the board surface to engage with a hanging portion disposed in the hand; a pressing member that prevents the hand hung on the hooking member from moving to a direction separating from the board surface; and a supporting member that restricts the hand hung on the hooking member from moving to a direction approaching the board surface. The hand is sandwiched between the pressing member and the supporting member and housed.

Abstract: A drill includes a shank and a body having an outer peripheral surface with a certain outer diameter and a distal end tapered surface of a certain distal end angle. The drill includes a pilot shaft portion projecting from the distal end tapered surface of the body and having a diameter smaller than the body and having an outer peripheral surface of a certain outer diameter. The drill further includes an odd number of twisted grooves extending from the outer peripheral surface of the body to the outer peripheral surface of the pilot shaft portion at a certain twisted angle, an odd number of main cutting edges formed on the distal end tapered surface of the body by forming of the twisted grooves, and an odd number of auxiliary cutting edges formed on the distal end tapered surface of the pilot shaft portion by forming of the twisted grooves.

Abstract: A sharp extractor has a ram that is actuatable to move from a disengaged position to an engaged position to dislodge a sharp from a medical device, and then return back to the disengaged position. With the medical device secured in axial alignment with the ram, the actuator is actuated to move to its engaged position, whereupon the sharp is detached from the medical device. The dislodged sharp is channeled directly into a medical waste container. Upon removing the sharp from the medical device, the medical device can be treated as standard medical waste, thereby reducing the cost associated with disposal of the medical device. With the volume of the sharp being greatly reduced as a result of removal from the relatively bulky medical device, the frequency of having to dispose the sharps can be greatly reduced, thereby further reducing cost associated with the disposal of the sharps.

Abstract: The invention relates to a jaw pair for punching out holes or recesses, preferably in sheet metal parts, the jaw pair being connectable to a device (23) to be operated preferably hydraulically and being designed, for example, as a pivoting jaw pair, wherein a punch (8) is formed on one jaw and a punching opening (6) is formed on the other jaw. To provide an advantageous jaw pair for punching out holes or recesses, preferably in sheet metal parts, it is proposed that a stripper part (10) which is situated outside of an outer contour of the punch (8) in the punching direction is formed in the jaw having the punch (8) and is movable in relation to the punch (8).

Abstract: The invention relates to an endodontic instrument used for working on a canal in a tooth, having a base from which an active portion for working on the canal extends longitudinally, characterized in that said active portion has at least one slot extending longitudinally and forming a passage for fluid.

Abstract: The invention provides a building drum for building an unvulcanized tire or air spring using rubber components. The building drum comprises a central shaft and a casing that can be slid onto the shaft. The casing is detachably attached to the shaft via a coupling pin that can be moved to a coupled position for mutually coupling the shaft and the casing and into an uncoupled position in which the casing can be removed from the central shaft. The casing further comprises a locking device with a locking pin, wherein the locking pin is adapted for, in the coupled position of the coupling pin, engaging thereon for substantially blocking a movement of the coupling pin. The locking device comprises a locking member that in a condition in which the locking pin does not engage onto the coupling pin, is placed such that it prevents a connection of lines to the casing, and/or provides an indication of the casing being mounted incorrectly.

Abstract: A connector unit for connecting at least two cables includes a male part, a female part, and a shuttle piston. The shuttle piston includes at least one magnetic connecting device for establishing a magnetic connection between the shuttle piston, and at least one magnetic connecting aid of the male part and at least one latching structure for establishing a force-fitting connection between the shuttle piston and the female part. The male part includes the magnetic connecting aid for interaction with the magnetic connecting device of the shuttle piston for establishing the magnetic connection between the shuttle piston and the male part, and an interaction area for interaction in a force-fitting manner with at least one backing latch of the female part. The female part includes the backing latch for establishing the force-fitting connection and for interacting at least with the interaction area of the male part in a force-fitting manner.

Abstract: A cutting tool assembly having a tool holder and a cutting tool. The cutting tool has a shank that is matingly received within an axial bore in the lower end of the tool holder. The shank includes an eccentrically-shaped driver portion. The tool holder's axial bore includes an enlarged eccentrically-shaped drive opening which is complementary in shape to, but slightly larger than, the driver portion. When the shank is inserted into the axial bore, the driver portion and drive opening are aligned allowing the cutting tool to be partially rotated relative to the tool holder. This partial rotation abuts a portion of the eccentric driver portion against the drive opening wall to provide rigid support of the cutting tool against further rotation as the tool assembly cuts. A cammed fastener releasably interlocks the partially rotated cutting tool within the tool holder.

Abstract: An apparatus includes a gas burner assembly which includes a gas burner and a gas supply conduit. The gas burner includes a gas supply opening and a substantially cylindrical socket formed on the exterior of the gas burner around the gas supply opening. The gas supply conduit includes an opening at an end and a substantially tubular adjoining section proximate to the opening. The adjoining section is configured to mate with the socket and includes a substantially radial protrusion. The socket includes a substantially radial depression for receiving the protrusion. As the gas supply conduit is connected with the gas burner to establish fluid communication at the gas supply opening, the protrusion is engaged in the depression thereby aligning the adjoining section in a predetermined manner about the socket and restricting rotational movement of the adjoining section about the socket.

Abstract: An interface between a receptacle body and an insert designed, in particular, as a tool or workpiece insert, comprises a receptacle body (2) having a cylindrical receiving bore (4), which is circumscribed by a first plane surface (6) extending at a right angle to the bore axis and in which a first cone surface (9) is arranged, said first cone surface being coaxial with the bore axis and being arranged so that its tapered end faces toward the plane surface. The insert (3) has a pin (15) that is disposed to be plugged into the receiving bore (4) and is circumscribed by a second plane surface (22). At an axial distance from the second plane surface (22), said pin has a second cone surface (22), the tapered end of said second cone surface being arranged so as to face toward the second plane surface.

Abstract: A fixture for facilitating the accurate and repeatable preset of chamfering tool cutting inserts to proper height and angle specifications. The fixture may include an upright main body with a removable insert for receiving an end of a chamfering tool of interest. The insert may include several raised support pads for supporting the chamfering tool in an elevated position. The fixture may also employ chamfering tool clamping mechanisms to securely clamp the chamfering tool to the fixture. The clamping mechanisms may include a feature that allows for proper clamping pressure to be exerted on a given chamfering tool even if a flange portion thereof is somewhat thicker or thinner than expected. One or more locating pins or other locating elements may also be employed to ensure repeatable location of a chamfering tool to the fixture.

Abstract: A punch down tool, a receiver for a punch down tool, and a work end adapter for a punch down tool, for terminating electrical conductors and turning fasteners, are disclosed. The work end adapter is adapted to receive standard tool bits and standard finned shaft tips. The punch down tool is adapted to receive standard blades and to receive the work end adapter. When installed in the punch down tool, the work end adapter rotates only with the punch down tool, and will not rotate independently of the punch down tool. The punch down tool has an impact mechanism and a lock-out button to prevent the tool's impact mechanism from operating.

Abstract: A cutting tool assembly having a tool holder and a cutting tool. The cutting tool has a shank that is matingly received within an axial bore in the lower end of the tool holder. The shank includes an eccentrically-shaped driver portion. The tool holder's axial bore includes an enlarged eccentrically-shaped drive opening which is complementary in shape to, but slightly larger than, the driver portion. When the shank is inserted into the axial bore, the driver portion and drive opening are aligned allowing the cutting tool to be partially rotated relative to the tool holder. This partial rotation abuts a portion of the eccentric driver portion against the drive opening wall to provide rigid support of the cutting tool against further rotation as the tool assembly cuts. A cammed fastener releasably interlocks the partially rotated cutting tool within the tool holder.

Abstract: A locking tool or device that permits rapid installation and removal of a removable component from a component that is fixed to a housing or equipment. The interchangeable, and hence removable, components may be held in place by individual holders that provide secure axial locking means and quick radial removal means requiring no axial space for the removal of such components from the main base tool.

Abstract: There is disclosed an impact termination tool, a receiver for an impact termination tool, and a work end adapter for an impact termination tool. The work end adapter is adapted to receive standard tool bits and standard finned shaft tips. The impact termination tool is adapted to receive standard impact termination blades and to receive the work end adapter. When installed in the impact termination tool, the work end adapter rotates only with the impact termination tool, and will not rotate independently of the impact termination tool. The impact termination tool has a spring-loaded impact mechanism and a lock-out button to prevent the tool's impact mechanism from operating.

Abstract: A system for use in securing an attachment to a driver having an attachment mounting area includes an attachment mount configured for releasable engagement with an attachment as well as a driver mount interconnected with the attachment mount. The driver mount includes a removable mounting member configured for engagement with the attachment mounting area of the driver.

Abstract: Arrangement for holding a tool fitting has a spindle with a forward directed surface and a bore which intersects the forward directed surface and which, starting from such surface, extends rearwardly in order to receive a shaft of the tool fitting. A device for locking the tool fitting with the spindle has an inner and an outer locking element which engage on another. The locking elements act in the manner of a bayonet coupling, wherein a projecting element is disposed in a blind stop groove extending first axially and subsequently radially in a circumferential surface starting from an end face.

Abstract: A down-the-hole drill hammer is provided that includes a housing, a solid core piston mounted within the housing, a seal located between the solid core piston and the housing, and a backhead configured to exhaust working fluid volumes about a proximal end of the DHD hammer. The backhead includes a check valve assembly having a plug seal that can be moved to a closed seal position by gravity. A DHD hammer having a segmented chuck assembly is also provided. The segmented chuck assembly includes a plurality of chuck segments forming a cylindrical chuck assembly.

Abstract: The present disclosure relates to a quick tool coupler adapted to a sliding hammer allowing quick change of its tools.

Abstract: The present disclosure relates to a quick tool coupler adapted to a sliding hammer allowing quick change of its tools.

Abstract: Eccentricity is not allowed to occur in a blade section, and a blade section is maintained in a stable installation state. A hook section 124, which is composed of a shaft section 125 and an end section 126 provided with a corner section 132 that protrudes as a ledge farther to the outside in the radial direction than this shaft section 125, is formed in a blade section 120. A hook hole 144, which allows the passage of end section 126 of hook section 124, is formed in a bolt section 140. Engaging sections 150 are formed around hook hole 144.

Abstract: An arrangement for transmitting a torque from a power tool to a working tool and including a shank forming part of the working tool and having following one another, in the operational direction of the working tool, first, second, third, and fourth regions (B1, B2, B3, B4), at least two drive grooves (3) extending parallel to a working tool axis over all of the shank regions (B1, B2, B3, B4), and at least one additional drive groove (4) extending in third and fourth regions (B3, B4) of the shank (2), with the arrangement further including a chuck (10) having an opening (13) for receiving the shank (2), at least one locking element (21) projecting into the receiving groove (13) for engagement into the circumferential groove (5) of the shank (2), at least two drive dogs (16) and an additional drive dog projecting into the receiving groove (13) for engagement in the first drive grooves (3) and the at least one additional drive groove (4).

Abstract: A novel drill bit adapter includes a body portion, a cap portion, a spring-biased catch and a push button actuator. The cap portion includes a transverse aperture and cooperates with the body to define a longitudinal aperture and a catch-receiving cavity. The push button is disposed in the transverse aperture and engages the catch to move the catch in the cavity relative to the longitudinal aperture in opposition to a biasing force supplied by the spring. The spring is a wire spring that extends longitudinally from the body portion into the cap portion to engage the catch.

Abstract: An arrangement for transmitting a torque from a power tool to a working tool and including a shank forming part of the working tool and having following one another, in the operational direction of the working tool, first, second, third, and fourth regions (B1, B2, B3, B4), at least two drive grooves (3) extending parallel to a working tool axis over all of the shank regions (B1, B2, B3, B4), and at least one additional drive groove (4) extending in third and fourth regions (B3, B4) of the shank (2), with the arrangement further including a chuck (10) having an opening (13) for receiving the shank (2), at least one locking element (21) projecting into the receiving groove (13) for engagement into the circumferential groove (5) of the shank (2), at least two drive dogs (16) and an additional drive dog projecting into the receiving groove (13) for engagement in the first drive grooves (3) and the at least one additional drive groove (4).

Abstract: A body 52 of a chuck 30 has an axial opening 34 and is formed with three spaced radial slots 58 which receive three respective locking fingers 68 extending radially inward from a circular band 66. The band 66 is located outside of, and rotatable relative to, the body 52. The band 66 and the locking fingers 68 form a latching unit 64 which is confined to a transaxial plane 61. A spring 70 is attached the latching unit 64 and to the body 52 and normally urges each of the locking fingers 68 against one end of the respective slots 58. A plurality of spaced ribs 54 extend radially inward from an inner wall of the opening 34. A bit 36 is formed with a shank 38 having a plurality of axial grooves 42 which extend through a free end of the shank. A wall of each groove 42 is formed with a transaxial groove 50 at a prescribed distance from the free end of the shank 38.

Abstract: A mechanism for engaging a chuck to a chuck body includes a bore within the chuck body having first and second opposed channels in communication therewith. A shaft extending from the chuck is configured for seating in the bore and includes two opposed vanes for seating in the channels. The vanes are depressible allowing for initial bore penetration and seating of the chuck shaft into the bore. Upon seating the vanes are biased into the channels locking the chuck shaft in the bore. A tool provides for depression of the vanes allowing for removal of the seated chuck shaft from the bore. Alternative mechanisms for locking a chuck, chuck body and a driven shaft are disclosed.

Abstract: A tool with changeable working tips has a tool shaft with an attachment end adapted to receive the attachment end of a working tip in freely removable engagement therewith. A sleeve is moved over the engagement of the shaft and working tip to securely hold the shaft and working tip together in engaged position so that any rotation or other movement of the shaft is transferred to the working tip. The sleeve is removable from around the engagement ends of the shaft and working tip, such as by removal from the tool or retraction into the tool, to allow the working tip to be removed from engagement with the shaft and a different working tip to be engaged with the shaft. The sleeve is replaced over the engagement of the engagement ends to hold the different working tip in place.

Abstract: A quick change chuck assembly for tool bits uses a bayonet style lock. The assembly is constructed with a bore that receives a multi-faceted shank of a tool bit. Rotating the shank within the bore locks the shank in place, preventing undesired axial extraction of the tool bit from the assembly.

Abstract: An improved tool holding apparatus includes a collet chuck or a steel ball chuck that clamps a pull bolt, which defines the forward end portion of a tool, by resilient force applied thereto from a coned disc spring. The tool holding apparatus further includes a temporary clamping device which is buried in a sleeve to temporarily clamp the pull bolt. A clamping force applied by the temporary clamping device is set at such a level that an arm can draw the tool from a main spindle by gripping the rear end portion of the tool.

Abstract: A mechanical chuck for clamping the shank of a tool comprises a receiver having a forwardly open, rearwardly tapering socket. A pull rod is mounted for front-to-rear reciprocation in the socket. The pull rod is connectible to the tool shank. A plurality of pins are mounted in the receiver for front-to-rear movement therein. Rear ends of the pins engage the pull rod. A nut is threaded on the outside of the socket so that when rotated, the nut displaces the pins rearwardly. The pins displace the pull rod and shank rearwardly, so that the shank is tightly engaged in the socket.

Abstract: The tool holding cartridge is male and the second cartridge holding part is female and defines a cylindrical bore with diametrically opposed apertures near the forward face of the bore, the apertures carrying ball bearings, biased, so that a substantial portion of the ball bearing intersects and projects into the cylindrical bore. Those portions of the ball bearings that do so, act as a guide and locking means for the tool holding cartridge which has a cylindrical shaft which extends into a tool holding portion into which a tool may be anchored or secured, as may be required. The tool holding cartridge has, along the outer walls of the cylindrical portion thereof, near the proximate end of the cylindrical portion, a circumferential race that intersects with the proximate ends of two diametrically opposed axially oriented lead raceways defined in the outer perimeter of the cylindrical portion and that terminate at the outer shoulder and peripheral wall at distal end of the cylindrical portion.

Abstract: A drilling and chipping tool (1) has a holder (3) detachably connectable on a neck (2) on the tool (1) and the holder (3) includes a cap (4) arranged to fit over the neck (2). The tool (1) has a long direction and the cap (4) has teeth (5, 5a) on an interior surface detachably engageable with teeth (2a) on an exterior surface of the neck (2). A part (5a) of the interior teeth (5, 5a) on the cap (4) is offsettable relative to the remaining teeth (5) on the cap (4) and is engageable into at least one recess (2b) in the region of the teeth (2a) on the neck, whereby a tolerance free connection is established between the holder (3) and the neck (2) of the tool (1). The holder (3) can be attached and detached from the neck (2) without the use of any other tools.

Abstract: A retractable tool bit assembly utilized in conenction with a robotic gripper type and end-effector. The apparatus includes one or more spring loaded nestable or telescoping tubular sections together with a catch mechanism for capturing and holding the tool, such as an allen key, in its retracted position. The innermost tubular section includes a threshold cap and engages and holds the tool. The catch mechanism consists of a slider type mechanism located adjacent a relatively larger outer base sction and includes means for engaging a conically or mushroom shaped rear end portion of the tool when the telescoping sections are moved to a retracted or parked position. The catch mechanism is released upon actuation of a rotary tool drive motor coupled to a circular mount and which holds the base section. When released all the telescoping sections including the tool extends fully outward to a use position.

Abstract: A tool head can be connected to a tool holder by an open-ended tension ring provided in a peripheral conical recess of the tool holder. The diameter of the tension ring can be reduced by an actuating device acting tangentially with respect to the tension ring. In a coupling position of both tool portions, the tension ring at one side is supported by a side surface of the recess and at the opposite side presses against an annular shoulder of a fitting pin of the tool head.

Abstract: A mixer for liquids and liquid suspensions has a motor drive and housing which is portable and can be carried from tank to tank and attached to the tank where mixing is carried out. The housing depends from the yoke and contains a quill which is driven by the motor drive. A chuck mechanism is associated with the housing and quill to enable mixer impeller shafts to be held in assembled relationship in the mixer and readily removed and replaced with shafts having impellers specially adapted for the particular mixing application of interest. The chuck mechanism is operable even though the quill is hidden in the mixture housing.

Abstract: A tool clamping device comprises an axial sleeve having a forwardly tapering internal surface. A radially compressible ring is disposed on the internal surface. An axially compressible spring opposes axial movement of the ring while permitting axial rearward movement of the sleeve whereby the tapering surface of the sleeve compresses the ring radially inwardly into coupling engagement with a groove formed in a tool holder.

Abstract: In a chuck for axially clamping two machine parts which are releasable from each other, on the first machine part (1) are provided a hollow centring attachment (3), a contact face (6) surrounding the attachment, and an annular groove (8) formed on the inside of the attachment (3) and comprising a groove flank (9) tapering conically towards the free end of the attachment. The second machine part (2) comprises a holding bore (4) which is adapted to the attachment (3) and which is surrounded by an end face (7) against which the contact face (6) can be pressed. In the second machine part are provided several clamping jaws (10) which are each supported by a first end (10a) against a groove flank (12) in the second machine part (2).

Abstract: The invention relates to a tool holding system for automatic tool changing in a machine tool, stamping machine or other such machine, wherein the machine has a spindle which has at its free end a gripping means in the form of a sleeve for a tool which can be inserted and removed by a tool changing system, while a draw rod actuating the sleeve by axial displacement is guided in the spindle, and the tool having at the spindle end a tool holding head with an inverted centering frustum cone which can be engaged by a conical inner surface of the sleeve in its clamping position in order to clamp the tool against the spindle.

Abstract: A cutter adapted to be rotated about a front-to-rear extending longitudinal axis comprises a front portion having a cutting edge, and a rear portion for mounting a cutter. The rear portion has a conical outer periphery, the shortest radius of which is defined by a rearmost end of the rear portion. The rear portion includes a hook-shaped projection formed by a laterally open recess in the outer periphery.

Abstract: A retention knob for reversibly locking a tool holder to a locking device in which the shaft of the retention knob has a pair of opposed recesses separated by non-recessed portions to thereby provide a significantly stronger locking engagement between the tool holder and the locking device. Also disclosed are cutting tool assemblies employing the retention knob.

Abstract: A friction-weldable stud is provided. The stud includes an elongate body having a collar or skirt located around the body and extending outwardly therefrom. The collar has a first surface facing in one direction toward one end of the body, with the surface having an engagable configuration for engagement by a cooperating configuration of a chuck of a welding tool. The tool can thereby rotate the stud and also apply an axial force to it through the chuck and collar. The collar has a second surface facing away from the first surface preferably with an annular groove which helps shape the weld material and control flash during the welding. The body also has a friction-weldable nose or end extending outwardly from the collar in the direction of the axis of the elongate body by means of which the stud can be affixed to a workpiece by a friction-welding technique.

Abstract: The present invention relates to a tool for metal cutting, said tool in working position preferably rotating around its longitudinal center axis, and that the tool comprises a cutting body (10;10a;10b;10c) and a shaft (12;12a;12b;12c), that supports the cutting body (10;10a;10b;10c).The aim of the invention is to solve the problem to design milling, drilling and turning tools of small dimensions having exchangeable cutting edges.The present invention is characterized in that the cutting body of the tool is designed as a uniform body comprising integrated cutting edges. By means of a locking screw (11; 11a;11b;11c) the cutting body (10;10a;10b;10c) is detachably fixed in the shaft (12;12a;12b;12c).

Abstract: Central drawbar operated tooling connection system wherein a pair of wedges are positively driven laterally outward and retracted by reciprocation of a central drawbar. Mechanical advantage of a key slot between drawbar and wedges plus mechanical advantage of the wedge angle amplifies a drawbar force for producing axial loading in the order of 5:1. Alternative forms of drawbar actuation such as by screw thread feed, preloaded spring with hydraulic release are optional.

Abstract: A clamping apparatus for clamping the attachment for mounting the tool to the part to which the tool is mounted of the machine tools is disclosed. The attachment for mounting the tool is coaxially provided with the taper extruding shafts which are fitted into the taper hole of the part to which the tool is mounted and the holding shafts the peripheral part on the tip end of which has the holding claw being laterally extruded. The clamping cylindrical article equipped with the claw to be held whose engagement with the holding claw, introduced by the fixed angular amount of forward rotation of the clamping cylindrical article, allows the attachment for mounting the tool to be prevented from coming off, is disposed in the part to which the tool is mounted such that the clamping cylindrical article may be rotatable and axially movable.

Abstract: A clamping device for releasably securing a tooling adaptor in a tool clamp block which includes a generally cylindrical member having an eccentric slot formed about the periphery of the member for engaging the tooling adaptor in the cylindrical member whereby when the cylindrical member is rotated the tooling adaptor is drawn into and secured within the tool clamp block.

Abstract: The cutting tool comprises a cutting head and a holding shank and, for transferring the torque introduced on the cutting head during machining, faces are provided in a recess of the bearing surface of the holding shank on which engage the stop faces of the cutting head. A fixed connection between the cutting head and the holding shank is brought about by a threaded pin screwed into a tapped hole on the holding shank and which projects into a conical blind hole on the cutting head. As the torque is transferred in the vicinity of the bearing surface, the threaded pin is only loaded to the extent that there is a clearance-free connection between the cutting head and the holding shank.

Abstract: In a machine tool, especially a punch, having a vertically movable upper tool carrier (1) with at least two punching tools (2) located next to each other and a lower tool carrier (3) with at least two punch matrixes (4) located next to each other, wherein preferably each punching tool (2) consists of a punch (5), a punch holder (6) and a retaining nut (7) connecting the punch (5) with the punch holder (6), and taking into consideration the cramped space in the upper tool carrier (1), a quick change of a punch (5) or of a punching tool (2) and/or of all punches (5) or punching tools (2) is possible, because the upper tool carrier (1) has a receiver plate (8) with a plurality of punch receivers (9) located next to each other and corresponding to the number of punching tools (2), because the punch receivers (9) are open in the direction of the front face of the upper tool carrier (1) and thereby the upper ends of the punching tools (2) or the punch holders (6) of the punching tools (2) are insertable or can be p

Abstract: A cutter adapted to be rotated about a front-to-rear extending longitudinal axis comprises a front portion having a cutting edge, and a rear portion for mounting a cutter. The rear portion has a conical outer periphery, the shortest radius of which is defined by a rearmost end of the rear portion. The rear portion includes a hook-shaped projection formed by a laterally open recess in the outer periphery.