Abstract: An earth-boring tool includes a blade located on a body of the earth-boring tool with a pocket formed in an exposed outer surface of the blade. A formation-engaging structure is affixed within the pocket. The formation-engaging structure includes a distal end, a proximal end and a tapered sidewall therebetween. The distal end of the formation-engaging structure includes a formation-engaging surface. The tapered sidewall engages a tapered inner surface of the pocket. The tapered sidewall of the formation-engaging structure and the tapered inner surface of the pocket are each sized and configured to provide an interference fit between the formation-engaging structure and the pocket of the blade. In additional embodiments, instead of retention by interference fit, the formation-engaging structure is retained to the blade by a threaded fastener threaded within a tapped bore extending through the blade. The threaded fastener is received within a receiving formation of the formation-engaging structure.

Abstract: The invention relates to a hydraulic expansion chuck (1) with a hydraulic expansion mechanism (23) that is integrated into a chuck body (10, 20) and exhibits an expansion bushing (23a) with a continuous cylindrical interior wall, and to a reducing bushing (24) arranged in the expansion bushing (23a) for accommodating a shank tool (W), in particular a tap drill. According to the invention, the outer circumference of the reducing bushing (24) is positively connected with the chuck body (10, 20) in a torque-proof manner, and its inner circumference is designed to be positively connected with the shank tool (W) in a torque-proof manner.

Abstract: A chuck has a chuck body at least generally centered on a body axis and a collet in the hole and having an external screwthread. A ring axially nondisplaceable in the body has an internal screwthread engaging the screwthread of the collet and external gear teeth. The body is formed with a radially outwardly open cavity seat in which some of the teeth of the ring are exposed. A gear fitted in the seat meshes with the ring teeth and can rotate about a drive axis not parallel to the body axis to rotate the ring about the body axis. According to the invention a sleeve on the chuck extends axially across and covers the seat to retain the gear therein and is formed with a through going aperture through which a tool can fit to engage and rotate the gear.

Abstract: The invention relates to a high-precision clamping device for tools in machine tools of the conventional type according to ISO 15488 and to a collet chuck, a base and a tensioning nut. The invention also relates to a chuck key for tightening the locknut without radial stress. The clamping device according to the invention is characterized by a substantially improved runout accuracy, torsional rigidity of the collet chuck and rigidity of the tool clamped therein.

Abstract: A collet adaptor 20 including a work piece clamp mechanism 29. The collet adaptor 20 is rotatable about a first axis A and the work piece clamp mechanism 29 is mounted within the collet adaptor 20 for rotation with the collect adaptor 20. The clamp mechanism 29 is also mounted for movement laterally to the first axis A during rotation of the collet adaptor 29. The clamp mechanism 29 can also be mounted within the collect adaptor 20 for rotational movement lateral to the first axis A during rotation of the collect adaptor 20.

Abstract: A locking instrument assembly for use in conjunction with an intramedullary device is disclosed. The locking instrument assembly includes an inner collet, an outer body, and a knob. The inner collet has a collar and a fastener member. The knob engages the fastener member to press the outer body against the collar. As the knob mates with the fastener member, the collar applies a clamping force to the intramedullary device.

Abstract: The invention relates to a collet chuck (1), comprising a chuck body (3) that is or can be connected in a rotationally fixed manner to a drive spindle (2), a collet (4), and a conical sleeve (5) associated with the chuck body (3). The conical sleeve (5) is arranged on the chuck body (3) in such a way that the conical sleeve cannot slide axially, and a threaded connection (6) is effective between the chuck body (3) and the collet (4).

Abstract: A chuck device includes: a chuck body having a tapered hole at a front end portion and being fixed to a rotational spindle of the machine tool; a collet capable of being reduced in diameter and inserted into the tapered hole for holding the tool; and a nut that can be screwed to the chuck body for fastening the collet. A non-alignment prevention member is provided for suppressing relative movement by bringing the nut into radial contact with the chuck body even when the spindle of the machine tool is rotated and includes a first nut rear end side tapered surface at a farther rear end side than a screw portion, and a chuck body side tapered surface formed in the chuck body for coming into contact with the first nut rear end side tapered surface when the nut is screwed up.

Abstract: A chuck has a chuck body at least generally centered on a body axis and a collet in the hole and having an external screwthread. A ring axially nondisplaceable in the body has an internal screwthread engaging the screwthread of the collet and external gear teeth. The body is formed with a radially outwardly open cavity seat in which some of the teeth of the ring are exposed. A gear fitted in the seat meshes with the ring teeth and can rotate about a drive axis not parallel to the body axis to rotate the ring about the body axis. According to the invention a sleeve on the chuck extends axially across and covers the seat to retain the gear therein and is formed with a through going aperture through which a tool can fit to engage and rotate the gear.

Abstract: The invention relates to a chuck with a chuck body (2) having a centering hole (3) that is tapered frustoconically and in which is provided a clamping member (4) having a clamping thread (5), with an angle drive (8) having a threaded ring (6) engaged with the clamping thread (5), axially fixed to the chuck body (2), coaxial to the clamping member (4), and rotatable by a drive member (9) that can be rotated about a drive axis that is not parallel to the chuck axis. The drive member (9) can be inserted from the end opposite to the centering hole (3) into a body cavity (10) that can be closed by a plate (11) that is supported on the chuck body (2) and/or the threaded ring (6). The drive member (9) is accessible for a drive tool through an aperture (12) in the cavity wall (13).

Abstract: To compensate for tolerances and diameter differences during the chucking of a tool shank (15) in a tool holder (1) of the shrink-fit chuck type, a diameter-compensating bush (17) is provided. The diameter-compensating bush (17) has an outer sleeve (19) having a tapered inner circumferential surface (25) and an inner sleeve (21) arranged coaxially therein and having a tapered outer circumferential surface (27). Once the diameter-compensating bush (17) has been put onto the tool shank (15) and the inner sleeve (21) has been drawn into the outer sleeve (19), for example by means of a ring nut (35), for the diameter compensation, the outer sleeve (19) is thermally shrunk in place in the locating section (9) of the tool holder (1). In this way, rotary tools whose tool shank (15) does not have a diameter corresponding to the diameter or the tolerance requirements of the tool holder (1) can be chucked in a tool holder (1), for example, of the shrink-fit chuck type.

Abstract: A collet holder for insertion into a multi-jaw chuck. The collet holder includes a multi-faceted body having a smooth bore extending therethrough for housing a standard collet and a cap nut threadably secured to the body.

Abstract: An collet and lock nut assembly includes a collet for receiving a cutting tool shank and a lock nut for creating a gripping force between the collet and the shank. The collet has a nose portion and a body portion separated by an annular groove. The lock nut has a plurality of retention tabs and a corresponding number of clear portions. The collet and lock nut assembly can be easily assembled by inserting at least one retention tab within the groove of the collet, and then applying pressure to the collet such that the remaining retention tabs of the lock nut are received within the groove of the collet to place the assembly in a locked position. The collet and cutting tool shank can be drawn from the tool holder by applying rotational torque to the lock nut. The collet is easily removed from the lock nut by applying pressure in any circumferential, lateral direction against the collet.

Abstract: A tool chucking apparatus includes a fastening member, a collet, a holding member and an extension member. The fastening member has a first housing space to hold the collet. The collet has pawl structures spaced in an annular manner and formed in a conical structure. The conical structure has a top end directing towards the fastening member. The extension member includes a support portion and an anchor portion coupled together. The support portion has another end tightly coupled with the collet and the fastening member. The anchor portion has another end tightly coupled with the holding member. The support portion is selectable at a desired length specification according to the cutter or tool. The fastening member, collet, holding member and extension member are hollow in the center thereof to form an installation passage after assembly to hold the cutter or tool.

Abstract: A power tool includes a spindle assembly supported for rotation about an axis. The spindle assembly includes a plurality of engagement members, and at least two of the engagement members are disposed in spaced relationship less than one hundred eighty degrees from each other with respect to the axis of the spindle assembly. The power tool also includes a spindle lock assembly that selectively engages at least one of the plurality of engagement members to lock the spindle assembly against rotation about the axis.

Abstract: A collet assembly, for selectively attaching a tool accessory to a tool, having a collet nut rotatably connectable to the tool, a collet compressible by the collet nut, and a torque application feature movably connected with the tool. The torque application feature is cammingly actuated to engage the collet nut for compressing and loosening the collet.

Abstract: A collet and lock nut assembly includes a collet for receiving a cutting tool shank and a lock nut for creating a gripping force between the collet and the shank. The collet has a nose portion and a body portion separated by an annular groove. The lock nut has a plurality of retention tabs and a corresponding number of clear portions. The collet and lock nut assembly can be easily assembled by inserting at least one retention tab within the groove of the collet, and then applying pressure to the collet such that the remaining retention tabs of the lock nut are received within the groove of the collet to place the assembly in a locked position. The collet and cutting tool shank can be drawn from the tool holder by applying rotational torque to the lock nut. The collet is easily removed from the lock nut by applying pressure in any circumferential, lateral direction against the collet.

Abstract: An adapter for installing a connector to a terminal post, wherein the connector is attached to a cable, is presented. In an embodiment, the adapter is comprised of an elongated collet member having a longitudinal axis comprised of a first collet member end, a second collet member end, an outer collet member surface, and an inner collet member surface. The inner collet member surface at the first collet member end is used to engage the connector. The outer collet member surface at the first collet member end is tapered for a predetermined first length at a predetermined taper angle. The collet includes a longitudinal slot that extends along the longitudinal axis initiating at the first collet member end for a predetermined second length. The first collet member end is formed of a predetermined number of sections segregated by a predetermined number of channels and the longitudinal slot.

Abstract: A chuck is composed of a collet sleeve, a sliding member, at least one linkage member, a collet, and a driving member. The collet sleeve includes an axial hole running therethrough and at least one opening in communication with the axial hole. The sliding member is slidably received in the axial hole of the collet sleeve. The linkage member is inserted through the opening of the collet sleeve and connected to the sliding member. The collet is inserted into the axial hole of the collet sleeve and connected to the sliding member. The driving member drives the linkage member and the sliding member to move for drawing in and pushing out the collet with respect to the collet sleeve.

Abstract: A gear reducing collet nut assembly is provided for holding a tool bit. The assembly includes an outer grip sleeve that can be rotated to actuate a clamping structure with a bore for holding a tool bit. More specifically, the assembly includes a planetary gear system to amplify torque from the grip sleeve to facilitate effective manual operation. The assembly includes a base member that is securable to a shaft of a rotary power tool, and the planetary gears are rotatably mounted at a plurality of positions on the base member. The planetary gears are driven by a central sun gear that is fixed to the grip sleeve. The planetary gears deliver torque to a ring gear that extends peripherally around the planetary gears. Movement of the ring gear is effective to actuate the clamping structure. In an embodiment, an exterior of the ring gear is threaded to the base member and axially fixed relative to the grip sleeve.

Abstract: In order to provide a tool holder which greatly reduces frictional resistance between a locknut and a taper collet, and eliminates a twisting of the taper collet during tightening of the locknut, in a tool holder comprising a locknut 13 which pushes a taper collet 12 into a tapered hole 115 of a collet chuck body 11 to chuck a cutting tool 15, between a reference end 123 of the tape collet 12 and a collet supporting portion 131 opposed thereto, interposed is a bearing washer 14 to reduce frictional resistance between both contact surfaces. To both surfaces of this bearing washer 14, namely, to the respective surfaces which come into contact with the reference end 123 and collet supporting portion 131, surface treatment by any of ion nitriding, DLC (Diamond-Like Carbon) coating, and TiN coating is applied.

Abstract: The present invention enhances the lubricating property of the sliding surfaces of a clamp nut and a collet, reduces a friction coefficient, prevents the occurrence of seizure, and enhances durability. Accordingly, it is possible to rotate the clamp nut and the collet without causing vibrations due to imbalance. Moreover, this invention provides a clamp nut that can maintain tool-mounting accuracy for a long period of time even in the case of high-speed rotation, and also provides a collet chuck including such clamp nut. Concerning the clamp nut which is mounted on a collet chuck body for holding tools in the collet and which clamps the collet chuck body and the collet together, at least a part of the clamp nut which comes in contact with the collet is made of oil-bearing metal.

Abstract: A one-piece constructed adapter collet tool, for adapting a smaller standard collet to a standard oversized spindle on a machine tool. Said one-piece constructed adapter collet having an external configuration constructed to mate said oversized standard spindle configuration, and an internal configuration constructed to mate with said smaller standard collet configuration. Said adapter collet is constructed with external threads for the purpose of engaging the draw spindle or draw spindle adapter internal threads. Said adapter collet is constructed with an external keyway to work in conjunction with said spindle pin on a machine tool. Said adapter collet is constructed with internal threads for the purpose of engaging said standard smaller collet external threads. Said adapter collet will have a setscrew compressing on said standard collet threads this action will fix the rotation of said standard collet.

Abstract: A chuck is composed of a collet sleeve, a sliding member, at least one linkage member, a collet, and a driving member. The collet sleeve includes an axial hole running therethrough and at least one opening in communication with the axial hole. The sliding member is slidably received in the axial hole of the collet sleeve. The linkage member is inserted through the opening of the collet sleeve and connected to the sliding member. The collet is inserted into the axial hole of the collet sleeve and connected to the sliding member. The driving member drives the linkage member and the sliding member to move for drawing in and pushing out the collet with respect to the collet sleeve.

Abstract: In order to provide a tool holder which greatly reduces frictional resistance between a locknut and a taper collet, and eliminates a twisting of the taper collet during tightening of the locknut, in a tool holder comprising a locknut 13 which pushes a taper collet 12 into a tapered hole 115 of a collet chuck body 11 to chuck a cutting tool 15, between a reference end 123 of the tape collet 12 and a collet supporting portion 131 opposed thereto, interposed is a bearing washer 14 to reduce frictional resistance between both contact surfaces. To both surfaces of this bearing washer 14, namely, to the respective surfaces which come into contact with the reference end 123 and collet supporting portion 131, surface treatment by any of ion nitriding, DLC (Diamond-Like Carbon) coating, and TiN coating is applied.

Abstract: A collet assembly for a tool comprising a collet nut rotatably connectable to the tool; a collet operatively connectable to the collet nut; and a collet wrench movably connected with the tool and engageable with the collet nut for tightening and loosening the collet.

Abstract: A clamping sleeve/tensioning device comprises a clamping sleeve that is positioned inside a conical centering opening of a housing body. A chucking mechanism with rotational body is used to tighten or release the clamping sleeve. The rotational body is provided with a central opening, having an internal thread or an external thread, which directly engages in the clamping sleeve. The rotational body preferably is supported via a roller bearing on a corresponding bearing surface of the housing body. The rotational body is driven via a reducing gear, for example via a worm. As a result, high tensioning forces can be generated in connection with the relatively small diameter of the tensioning thread and the small conical angle. The small diameter of the tensioning thread ensures a low thread friction.

Abstract: A tool holder is disclosed for a rotary tool having an elongated cylindrical shank. The tool holder includes an HSK body having a cylindrical bore with a predetermined inside diameter. An elongated cylindrical insert has a throughbore or collet pocket and the insert has an outer diameter larger than the inside diameter of the body cylindrical bore. Thus, the insert is insertable into the body cylindrical bore only when the body front nose is heated to a predetermined temperature at which temperature the body thermally expands to an extent that the inside diameter of the body bore is greater than the outer diameter of the insert. Upon subsequent cooling of the body, the body and insert are attached together. A collet is then used to removably and coaxially secure the tool shank to the insert within the insert throughbore. Other inserts may be used such as floating style holders, straight bore, etc.

Abstract: A collet assembly for a tool comprising a collet nut rotatably connectable to the tool; a collet operatively connectable to the collet nut; and a collet wrench movably connected with the tool and engageable with the collet nut for tightening and loosening the collet.

Abstract: In a cutting tool attaching and detaching apparatus of an ultrasonic vibration machining device, there are provided a collet attaching device and a collet removing device which can be separated from a shank and a collet.

Abstract: A damped tool holder system having, in combination, a longitudinally extending cylindrical tool provided with a forward outer cutting or operating end and a rearward inner end which is to be held within a tool holder; a coaxial tool holder receiving the inner end of the tool; a rigid mechanical support connection between the tool and the tool holder at a first region thereof; and a second annular support connection between the tool and the tool holder at a second region thereof spaced from but adjacent the first region and effected by a vibration damping annular film structure disposed therebetween at said second region.

Abstract: A resecting tool contains a rotatable chuck inside a base for engaging the drive shaft of a motor. The chuck extends into a tubular casing that has an outer actuator sleeve. The sleeve is limited to rotation relative to the casing and is used to move a pair of locking elements or balls in separate helical slots in the casing. Each ball is seated in a collar that abuts a collet receiver inside the casing. During implement changeover, the collar abuts the collet receiver and acts as a brake to prevent accidental actuation of the chuck of the tool. The collet receiver is spring-biased into contact with a first collet which closely receives a tool implement within the resecting tool. The sleeve is used to manipulate the collet to clamp onto and unclamp the tool implement. A collet coupling is located on the front end of the casing and has a collet nut on its forward end. The collet nut houses a second collet with a serpentine cut for engaging and retaining a guide sleeve for supporting the tool implement.

Abstract: A chuck is provided for use with a manual or powered driver, such as a drill. The chuck has a body member with angularly disposed passageways formed therethrough. A plurality of jaws are slidably positioned within the angularly disposed passageways. The jaws grip upon a tool shank inserted into the body member. A nut is rotatably mounted on the body member and has nut threads defined on an inner circumference thereof in engagement with the jaw threads. A sleeve member is in driving rotational engagement with the nut whereby when the sleeve is rotated with respect to the body member, the jaws are also moved within the passageways. A rotational stop is defined between the nut and jaws wherein upon the jaws reaching a predetermined position within the passageways, further rotation of the nut in an opening direction is prevented. The stop comprises a radially extending surface defining an end of the nut threads. The radially extending surface contacts a side surface of at least one of the jaws.

Abstract: The present invention comprises a quick-change tool system for a collet in alignment with a spindle of a milling machine. The collet comprises an elongated member having a first end of generally conical configuration with a bore arranged longitudinally therein. The collet has a second end for securement to a spindle in the machine. The quick charge tool system comprises a tightenable securement coupling for securing a tool in the collet and also for aligning the collet and a tool within the spindle. Subsequent requirement for re-adjustment of the "Z" axis coordinates of the tool within the collet and with respect to the spindle is eliminated.

Abstract: A chuck for use with a manual or powered driver having a drive shaft is provided. A generally cylindrical body has a forward section and a rearward section, the rearward section adapted to mate with the drive shaft of the driver. A gripping mechanism is actuatable to a closed position in which the gripping mechanism axially and rotationally retains a tool with respect to the body and to an open position in which the gripping mechanism does not so retain a tool. An annular nut is disposed about the body and has a threaded portion in threaded engagement with the gripping mechanism so that rotation of the nut about the body in a closing direction actuates the gripping mechanism to the closed position and rotation of the nut in an opening direction, opposite the closing direction, actuates the gripping mechanism to an open position.

Abstract: A sealed collet having improved radial flexibility is provided for facilitating removal from a locknut of a chuck assembly. The sealed collet includes a collet body formed from a tubular configuration of elongated gripping fingers separated by elongated slots which render the body radially resilient in response to pressure applied by a locknut. The slots are filled with a bonding agent, which may be a silicon rubber compound, for preventing dirt and debris from entering the collet slots and for preventing pressurized coolant intended to flow through a bore in a tool shank from flowing through the walls of the collet body. To increase the radial compressibility of the collet, agent-free gaps are provided in the slots immediately behind a distal portion of the collet body. In the preferred embodiment, the length of the agent-free gap is between 20% and 30% of the overall length of its respective slot.

Abstract: A chucking barrel is connected to a holder capable of being fitted into a rotation spindle of a machine tool. A plurality of axially extending projections are disposed in equally spaced relationship as viewed in the circumferential direction on the connection surface side of the holder, and a plurality of opening portions are formed between adjacent projections. A plurality of teeth-like projections, capable of being fitted in the opening portions, are radially formed on a driving annular member, and a plurality of male threads are formed on the outer surface of the tooth-like projections so as to allow the driving annular member to be displaced in the axial direction. A tightening ring has a plurality of female threads threadably engageable with a plurality of male threads on the driving annular member formed on an inner hole surface thereof, and the tightening ring is rotatably held on the outer peripheral surface of the chucking barrel.

Abstract: An integrated and collet and chuck device includes a body member configured to be non-movably fixed to a drive spindle of a driving tool. An outer sleeve member is disposed about a portion of the body member and is rotatable relative to the body member. The sleeve member comprises a front end defining a collet receiving chamber for carrying a conventional collet. A nut is configured with the sleeve member so as to be rotatable therewith relative to the body member. A screw member is disposed rotatably concentric within the nut. The screw and nut are threadedly engaged so that rotation of the nut drives the screw member in the longitudinal direction. The screw member has a collet engaging surface which presses the collet within the frusto-conical inner diameter surface of the sleeve thereby causing the collet to collapse and grip upon the shank of a tool carried therein.

Abstract: A chuck mechanism is described, which is easy to handle with a chuck clamping handle of increased diameter and is capable of achieving smooth movement of its reciprocally movable portion of reduced weight and assures safe operation with the least exposure of outwardly moving portion. Rotating a knurled portion of a body case rotates an intermediate transmission member which in turn rotates a slide shaft stopping member to tighten or loosen its engagement with a slide shaft, causing clamping or releasing of a collet chuck. The slide shaft, slide shaft locking member, chuck and a saw can reciprocally move as a single unit.

Abstract: A variable nut driver includes a multi-fingered collet with individual jaw faces at the free ends of the fingers and a ring connecting together all of the fingers at their other ends. The collet is contained within a tubular member secured to a handle. A flat thread follower within the collet has projections which extend between the fingers and through opposing elongated slots in the tubular member. The projections engage the inner thread of a rotatable sleeve surrounding the tubular member and collet at axially displaced positions. Rotation of the sleeve moves the thread follower and collet axially forward or back. As the collet is moved back the jaw faces extending past the open end of the tubular member are cammed toward each other. Conversely, as the collet is moved forward, the jaw faces move away from each other. Rearward movement of the sleeve is restricted by the position of the handle relative to the tubular member. This prevents the sleeve from becoming disengaged from the thread follower.

Abstract: A chuck having a spring collet is disclosed. The spring collet has a plurality of pairs of adjacent collet segments with interstices formed between each of the collet segments. The interstices of the collet each having radially extending cutout seats with resilient stoppers received therein which extend between a tool received in the collet and the body of the chuck to prevent coolant from leaking therebetween when flowing through the collet by way of a duct in the tool. The stoppers of the collet are axially spaced from each other so as not to weaken the collet.

Abstract: A tapered drawback collet which engages a conically tapered collet chamber in chuck body. A collet extension is axially displaced through high reduction gearing including a worm gear and threaded feed ring acting on a sleeve having only axial contact with the collet extension and therefore is free of any radial loading.

Abstract: A drill grinder for grinding a point of a drill including a shank, and a body which has the point. The drill grinder includes a holding device for removably holding the drill, and a grinding wheel adapted to be forced on the drill point, and to thereby grind the point while the drill is held by the holding device. The holding device includes a first chuck for gripping the shank of the drill, and a second chuck for gripping the body of the drill. The grinder has a holder mounting device for removably holding the holder device during a grinding operation on the drill by the grinding wheel. The grinder may further includes a drill setting device for removably accommodating the holding device, to position the drill in a predetermined circumferential position relative to the second chuck, prior to the grind operation.

Abstract: A tool holder for a gun drill or reamer has internal and external cylindrical rear end pilot portions and a radial pilot flange for precisely connecting coaxially with a rotatable and axially moveable power source. A sleeve confined coaxially within the internal cylindrical portion has an axially extending flat spline surface for effecting driving engagement with a mating flat of a tool shank. A contractible conical split collet at the forward end of the holder coaxially clamps the tool shank when moved axially to a clamping position by means of a non-rotatable nut secured to the collet for cocking out of axial alignment therewith to assure precise coaxial clamping of the tool shaft. The nut is in screw threaded engagement with a rotatable and non-axially moveable collar provided with beveled gear teeth for rotation by a Jacobs type tool.

Abstract: A workholder arrangement which employs a support module which can have one of several different workpiece-engaging units interchangeably mounted thereon so that the same workholder module can be readily adapted to function several different ways, such as a collet chuck, a step chuck and an expanding mandrel. The support module has a housing which attaches to the basic machine tool and slidably supports therein an activating sleeve defining an interior conical surface thereon, the activating sleeve being adapted for direct connection to and being axially movable by a draw or push bar.

Abstract: A collet adapter enabling use of a smaller collet in a larger spindle, the adapter comprising a reducer bushing externally configured so as to fit within the spindle and an internal configuration such as to receive the collet, the reducer bushing having an annular recess near the innermost end thereof, a draw tube adapted to engage a collet and positioned at least partially within the reducer bushing, the draw tube including a radial flange extending into the recess and spring means positioned in the recess around the draw tube for urging the draw tube axially forwardly in the reducer bushing, and means for connecting the draw tube for urging the draw tube axially forwardly in the reducer bushing, and means for connecting the draw tube to a collet actuating device.

Abstract: A chuck assembly and collet for retaining a commercially-available large-diameter, high-torque end mill (or similar) tool against axial pullout and against radial (or rotational) movement with respect to the assembly. The tool includes two axially spaced flat surfaces along the shank, one of which is coupled to the collet to prevent axial pullout and the other of which is coupled to the chuck to prevent rotation with respect to the chuck. The coupling to the chuck is accomplished by a ballclamp screw which extends through an aperture in the collet to the flat surface on the tool. The ballclamp screw has a flattened ball that is pivotally mounted in the screw's engagement and the pivotal mounting accommodates a few degree misalignment between the shank's flat surface and the screw without significantly affecting the coupling therebetween.

Abstract: A chucking device for tools or workpieces having a cylindrical or slightly conical chucking surface. The chucking device includes body (1), which is provided with truncated cone-shaped surface (3), cavity (4) located inside the surface and along a substantial portion of the axial extension thereof, and a pressurizing member located in body (1), by which the cavity as desired can be subjected to pressure by means of a medium. The device further includes holder (9) for tool (11) or workpiece (18) which is provided with a surface having a conical shape substantially corresponding to that of body (1), cylindrical surface (10) which is concentric with the conical surface, and slits (12) which are open at one end and extend through the wall of the holder. The device also includes clamp ring (15) which can be screwed on threads arranged in the body concentrically with the conical surface for causing the conical surface of the holder to contact the conical surface of the body.

Abstract: The chuck assembly and the collet for retaining an end mill tool against axial pullout. The collet includes a radially compressible body having a tapered outer surface, a central bore and a radial aperture extending from the outer surface into the central bore. The radial aperture has an undercut or larger diameter medial portion with a movable pin mounted therein, said pin being movably mounted and, adapted to extend into the bore to retain the tool. The pin has a hole drilled through with a spring bar mounted therein. The ends of the spring bar are compressed to a length smaller than the diameter of the radial aperture and inserted into the larger undercut portions where the expansion of the spring bar retains the pin. The hole in the pin is larger than the diameter of the spring bar to allow the pin to move along its axis (radially into the collet bar).

Abstract: A chuck assembly and collet for retaining a commercially-available large-diameter, high-torque end mill (or similar) tool against axial pullout and against radial (or rotational) movement with respect to the assembly. The tool includes two axially spaced flat surfaces along the shank, one of which is coupled to the collet to prevent axial pullout and the other of which is coupled to the chuck to prevent rotation with respect to the chuck. The coupling to the chuck is accomplished by a ballclamp screw which extends through an aperture in the collet to the flat surface on the tool. The ballclamp screw has a flattened ball that is pivotally mounted in the screw's engagement and the pivotal mounting accommodates a few degrees misalignment between the shank's flat surface and the screw without significantly affecting the coupling therebetween.