Abstract: A tool mounting between a cutting tool, for example a drill, and a machine spindle, comprising a tool element and a tightening device. The tool element consists of a body and an expandable attachment tap. The attachment tap is formed with grooves to receive a gripping implement of a tool interchanging mechanism and with a through opening to receive an end portion of a pull rod. The tightening device comprises a pull rod movably mounted in an inner pipe and forwardly projecting resilient portions. During changing to an other tool the opening at the attachment tap (13) is moved over the end portion by means of the gripping implement while a wall of the opening of the attachment tap slip against the resilient portions until a stop pin on the tool shank engages the end surface of the end portion and the resilient portions snap into recesses in the hole wall.

Abstract: A boring tool has a radially adjustable tool bit holder mounted on a head part connectable to an adaptor. A threaded stud for the connection between the head part and the adaptor has a thread arranged in each half, the two threads having different pitches or leads. An adjusting tool for the boring tool has a seat which mates with the threaded stud for rotating the stud relative to the thread arranged on the head part. The tool is marked with a scale in accordance with the formulaS=SG2/SG1 (scale factor)in which SG1 is the lead of one thread G1 on the threaded stud and SG2 is the lead of the other thread G2 on the threaded stud.

Abstract: A tool assembly includes a tool holder, a tool head and a clamping arrangement for rapidly releasably tightening the tool head to the tool holder. The clamping arrangement includes a clamping bar having a longitudinal axis and being received in the tool holder and a clamping piston connected to the clamping bar for displacement therewith. The clamping piston has first and second wedge faces arranged symmetrically to the bar axis and each defining therewith a first acute angle of at least 45.degree.. The clamping arrangement further has first and second cams movable in a direction of motion perpendicular to the bar axis. Each cam has a camming face constituted at least in part by a surface defining, with the direction of motion of the cams, a second acute angle equalling the difference between 90.degree. and the first acute angle.

Abstract: An adapter for a torquing tool includes an elongated body having a bore at at least one end to accommodate a working member such as a drill bit or fastener driver and a coupling means for detachably attaching the body to the tool. The improvement comprises a quick release means internal of the body member to detachably retain the working member within the bore and to the elongated body. The preferred quick release means is a spring loaded shuttle positioned in an opening radially through the body member and in communication with the bore.

Abstract: A quick-connect and quick-disconnect mechanism includes a male member which may be received in a female socket member. Cam means is journaled in an eccentric cam follower surface in the socket and is capable of rotation about a second axis displaced from the axis of the socket. A locking surface on the cam means faces in a longitudinal direction opposite the entrance of the socket and opposite that of a lockable abutment surface on the male member. An aperture in the cam means is sufficiently large to accommodate the entrance of the lockable abutment surface on the male member. The cam means is rotatable within the cam follower surface to move the cam locking surface with a radially inward component and a component of movement in a longitudinal direction away from the entrance of the socket to engage the lockable abutment surface to lock the male member in the socket. The cam means may also have an expelling surface to aid in expelling the male member from the socket.

Abstract: An automatic draw bar for removably securing machine tools carried by a tool holder within the spindle of a milling machine or the like, in which the tool holder is formed with an internally threaded bore. The spindle is provided with an elongated bore having a recess at its end to receive the shank of the tool holder. A hollow draw bar is slidably carried within the spindle and is exteriorly threaded at one end with a thread engagable with the tool holder interior thread. An elongated draw bar expander slidably carried within the draw bar and responsive to a source of linear power is adapted to couple the threads on the draw bar and tool holder to draw the tool holder into frictional engagement with the spindle upon activation of the power source.

Abstract: A taper adapter assembly is disclosed for attaching a boring bar or the like to a machine spindle. The adapter is made up of a tapered adapter member and a drive ring. The adapter member has a taper of the ordinary type with a bore in its small end to receive a draw bolt and a cylindrical portion on its large end which receives the drive ring and a cylindrical portion that extends out from the first mentioned cylindrical portion. The adapter is made up by inserting the tapered adapter member in the spindle of a machine, applying an adhesive to the enlarged cylindrical part of the taper adapter member and placing the drive ring over the cylindrical part and forcing the ring into place against the face of the spindle with a bonding clamp. The drive ring is thereby affixed to the taper adapter and the reduced size cylindrical portion inserted into a bore in the end of a tool holder. The flange of the taper adapter is bolted to the clamping ring. The tool holder (boring bar) is then bolted to the drive ring.

Abstract: A high speed motorized spindle is provided with a hollow tool-driving shaft having tool clamping means slidably disposed therein. A piston rod actuates the tool clamping means to slide in one direction to release a tool shank and spring means actuates the tool clamping means to slide in the other direction for gripping the tool shank when the piston rod is withdrawn. The piston rod actuates a collect clamp to clamp the tool-driving shaft against movement from tool unclamping forces when the tool clamping means is slid in the direction to release the tool shank. The tool-driving shaft is releasably oriented in a tool exchange position by a cam plate rotatable therewith being engaged by solenoid actuated cam lock member movably mounted in the housing.

Abstract: An exchange chuck for exchangeably mounting a tool shank adapted for mounting a tool such as drill or tap. The tool shank is inserted to and fastened in a mounting bore formed in a tubular portion of a spindle. A movable sleeve is received on the tubular portion for movement longitudinally thereof, and plural balls are provided to the tubular portion so as to be intruded into or receded from said bore with movement of the movable sleeve, said balls operating to engage with and prevent extraction of the tool shank when intruded into the bore. An ejector member is received in the bottom region of the bore and biased forwardly at all times by a coil spring for extruding the tool shank forwardly at the time of exchange operation of the tool shank.

Abstract: An attachment for fitting a tool to a hollow spindle of a machine tool, in a case where a shank portion of the tool has a taper-size smaller than that of a tapered hole of the spindle, comprises a hollow attachment body to be secured to the lower end of a ram of the machine tool, a sleeve rotatably supported in the attachment body, and an arbor assembly disposed axially movably in the sleeve. The arbor assembly comprises a stud arbor, a pull-stud to be engaged with a collet chuck disposed in the spindle, and a collet chuck to be engaged with a pull-stud of the tool inserted into a tapered hole of the sleeve.

Abstract: The present invention relates to rotary tool bits driven by electric tools where torque forces are transmitted to the rotary tool bits by way of adapting means through the shank portions of other tool bits already in the electric tools. These adapting means comprise elongated members closely, axially aligned disposed about these rotary tool bits and have inside surfaces adapted to fit said shank portions. The elongated members are pressed against said shank portions by compressing means which might be sliding sleeves. The adapting means might comprise two, three or six such elongated members. Low friction sliding sleeves with interior rolling members for such rotary bits are also provided.

Abstract: A draw bar for collet chucking spindles having an elongated body with a wrench head, a removable spacer positioned adjacent the head and first and second thread sections at the opposite end of the body, the first section being removed when the threads become worn and the second section being thereby accessible for collet opertion, the spacer being then removed likewise to operate a collet.

Abstract: This invention relates to means for connecting a male part with a female part, the male part being provided with a shaft that shall be inserted into a corresponding cavity in the female part and is retained there by means of a frictional device, the female part being to transmit a torsional moment to the male part.

Abstract: An adapter for a torquing tool includes an elongated body having a bore at at least one end to accommodate a working member such as a drill bit or fastener driver and a coupling means for detachably attaching the body to the tool so that at least a portion of the adapter is not housed within the tool. The improvement comprises a quick release means internal of the portion of the body member that is not housed within the tool to detachably retain the working member within the bore and to the elongated body and means associated with said bore and said working member for transmitting torque from the tool to the working member. The preferred quick release means is a spring loaded shuttle positioned in an opening radially through the body member and in communication with the bore. The preferred torque transmitting means is a pair of corresponding, opposed surfaces disposed on the bore and working member, respectively.

Abstract: An arrangement for quick-mounting and--dismounting of a cutting tool 10. A projection 21 on the machine spindle is fitted into a spacing 33 in a nut element 30 in the cutting tool and by rotation of the nut element 30 axially outwards the projection 21 is forced against an inner wall 39 of the spacing 33, whereby forcing the cutting tool 10 against the machine spindle.

Abstract: The subject invention relates to an assembly for facilitating the mounting and ejection of a rotatable cutting tool adaptor on a machine tool. More particularly, the subject invention allows a cutting tool adaptor to be manually interlocked with a rotatable spindle permitting standard cutting tools to be rapidly mounted on a machine tool. The assembly includes an elongated tapered tool adaptor shank, with one end thereof being defined by a flange having a V-shaped channel formed circumferentially therearound. The flange includes a pair of opposed slots interrupting the flange and in communication with the channel. A rotatable cylindrical spindle is configured to receive the tapered end of the adaptor shank. A cylindrical nut is provided for interconnecting the adaptor shank to the spindle. The inner surface of the nut includes a threaded portion which engages a threaded portion provided on the outer surface of the spindle. In addition, the nut includes two opposed projections extending radially inwardly.

Abstract: A removable element for a tool system is disclosed. The element may be used in a system of slide-on tools and adaptors that eliminates a two-handed operation for changing tool bits. The element comprises at least one prong located at one end at a selected distance and substantially parallel to an axis of rotation of the tool system. The prong is adapted to slidingly fit and rotationally abut with another element of the tool system to transfer rotary motion between the elements, and means are provided for supporting a tool bit on the axis of rotation at the other end of the element from the prong.

Abstract: An apparatus for chucking and releasing a conical shank of a tool or an additional aggregate on tool machines, particularly drilling and milling machines. The apparatus has a hollow spindle which is supported in a spindle housing and has at its lower end which faces the conical shank a receiving cone for the shank. A draw rod is supported for axial movement limited by a lower and an upper stop, is rotatably movable in the spindle, has at its end which faces the shank threads which can be screwed into threads on the shank, and is connected at its upper end to a drive motor rotor so as to be fixed against rotation but axially movable with respect thereto. Both stops are provided on a sleeve which concentrically surrounds the draw rod. The sleeve is supported on a spring arrangement. It is movable axially downwardly with respect to the spindle under the action of a hydraulically operated piston against the chucking force of the spring arrangement in a direction toward the receiving cone.

Abstract: A tool-clamping device for a hand tool machine with a rotary drive spindle includes a tool-clamping set having an outer sleeve mounted on an inner sleeve which serves to clamp a tool to be used and a locking plate which is pivotal relatively to a housing of the tool machine to lock the outer sleeve when the latter is adjusted on the spindle to a predetermined position in an axial direction or to release the outer sleeve for enabling an operator to quickly change a tool to be used in the hand tool machine.

Abstract: A tool assembly has a tool head insertable on a basic tool holder. The basic tool holder has a longitudinally displaceable locking bar and a plurality of slidable locking pins actuated by the locking bar. In a first position of the locking bar the locking pins are in an advanced position in which they project into respectively aligned lock holes of the tool head inserted on the basic tool holder. In a second position of the locking bar the locking pins are in a withdrawn condition, permitting the tool head to be pulled off the basic tool holder.

Abstract: A pneumatically powered spindle wrench is disposed and engaged atop the upper terminus of the powered vertical spindle of the vertical milling machine. The powered spindle wrench has a socket shaped and sized to engage the drawbar of the upper spindle terminus on signal. The tool holder is secured in and engaged in the spindle tapered aperture at the lower spindle terminus. On pneumatically powering and rotating the upper drawbar terminus of the spindle, the drawbar is unlocked and the tool holder can be removed from the spindle lower terminus. An electrically powered D.C. motor, and a hydraulically powered motor can also be equivalently substituted for the pneumatic motor drive.

Abstract: A tool driver for rotary cutting tools, such as reamers and drill bits, is described, along with rotary cutting tools of a novel design. The driver comprises a shank member having a cylindrical portion projecting axially from one end thereof and this cylindrical portion has at least two spline members projecting longitudinally from the end thereof remote from the shank. These spline members have curvilinear outer faces forming extensions of the cylindrical portion and also project inwardly to provide a central axial gap and radial gaps therebetween. A cylindrical sleeve member is rotatably mounted on the cylindrical portion and splines and this sleeve member has at the outer ends thereof radially inwardly projecting tab members which are adapted to engage notches in peripheral lands between the flutes of straight flute cutting tools when mounted in the driver.

Abstract: A cutting end protector is used in securing one of the cutting ends of a double ended drill bit in a drill chuck. The cutting end protector comprises a body portion contoured to mate with the inner surface of the drill chuck and adapted to receive the drill chuck pin. The body portion has a cutting end receiving face provided with a central recess for receiving the point of the cutting end and a pair of chamfered face portions diverging outwardly and forwardly from the body portion, one on either side of the central recess. The chamfered face portions are slanted in opposing directions for fitting flushly with the cutting edge trailing surfaces of the cutting end.

Abstract: A power drawfinger system for selectively locking and releasing a toolholder or arbor in the socket of a power driven machine tool spindle. The system includes a collet device actuated by a power drawbolt using hydraulic means for expanding said device and a resilient member for contracting same to disengage or engage the toolholder. The collet device and drawbar mechanisms are constructed to be fail safe in event of breakage of the collet or loss of power.

Abstract: The device is primarily designed to be used with vertical milling machines. This device may also be adapted to any machine tool spindle which uses an internally tapered end to hold the tool holder, collets, etc. etc. Due to the fact that this mechanism functions internally, it does not take away any of the machine's capabilities and no modifications are required to the existing spindle. Basically the device is composed of two major parts: the chuck that goes keyed inside the spindle and the air cylinder which is disposed on the side axially opposite from the chuck and fixed to the body of the machine. The chuck has an axially disposed plunger, a compression spring and two sets of spheres connected by a set of pins. The plunger is shaped to force radially outward a first set of spheres which in turn activates a second set of locking spheres to cause them to move radially inward and engage the tool holder.

Abstract: A toolholder has a shank with a tapered body which is adapted to fit into a complementary socket in an end face of a machine tool spindle. A blind bore in the body is engageable by holding means for holding the shank in the socket. A first axial section of this bore is threaded for engagement with a threaded member of one kind of holding means such as a pulling rod or a set bolt coacting with pulling means. A second axial section of the bore is enlarged to form an annular groove for engagement by an expansible head of a pulling member of an alternative kind of holding means. An encoder ring is removably fixed at the toolholder. Each time the tool is exchanged the encoder ring is replaced by an encoder ring corresponding to the new tool.

Abstract: A thread cutting die stock with a die stock head structure which has a first inner guiding surface for detachably receiving the shank of a first cutting head while radially inwardly of the aforementioned first guiding surface there is detachably arranged an adaptor having a second inner guiding surface for detachably receiving therein the shank of a second cutting head of smaller cutting size than that of the first cutting head, thereby making it possible by merely inserting or removing the adaptor to modify the die stock from receiving a larger sized thread cutting head to a smaller sized thread cutting head and vice versa.

Abstract: A Drawbolt is rotatably mounted within the spindle of a machine tool to secure a toolholder to a socket in the front end of the spindle. First and second spur gears are formed on the rear end of the spindle and drawbolt, respectively, and are positioned side by side. The two spur gears are equal in diameter, but have differing numbers of teeth. A planetary gear cage surrounds the spur gears and has pinion gears which are meshed with both spur gears. The planetary gear cage is attached to the armature of an electric motor which, when energized, rotates the cage and thus causes rotation of the drawbolt at a reduced speed. The speed reduction depends on the difference in the number of teeth in the two spur gears. The armature is axially shiftable to move a locking ring on the planetary gear cage into and out of engagement with the spur gear on the spindle.

Abstract: A chuck assembly and 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, which includes larger and smaller diameter portions, has a movable pin mounted therein and adapted to extend into the bore to retain the tool. The pin has an undercut portion, with a spring or snap ring mounted around the pin in the undercut portion, said spring having a free diameter slightly larger than the larger diameter to provide a pressure fit when mounted therein.

Abstract: An apparatus for power assisted locking and unlocking of cutting, grinding, or like tools received within the tool holder of a machine such as a vertical milling machine or the like. The described machine includes a spindle and a quill, and the tool is received within a collet held in a taper at the end of the spindle. A drawbar extends through the spindle and holds the collet into the taper locking the tool in the collet opening. The locking and unlocking apparatus includes a drawbar driving motor, a drawbar driving member associated with the motor, and means associated with the drawbar for providing a drive connection between the drawbar and the motor when the drawbar is in a pedetermined position. Means are provided to position the drawbar so that a part thereof engages the motor drive at the same time that a switch is closed so as to energize the motor and cause it to rotate the drawbar in one direction or the other.

Abstract: There is disclosed a machine tool, of the type having a tool magazine for receiving tools therein, and wherein a spindle head is moved in the direction of the axis of a spindle relative to the tool magazine such that one of the tools in the tool magazine is engaged with or disengaged from the spindle. A draw bar for firmly attaching a tool to the spindle is positioned inside of the spindle. The operation of the draw bar is actuated by the movement of the spindle head relative to the tool magazine.

Abstract: A machine tool high speed spindle assembly and draw bar assembly, wherein the spindle assembly includes a hollow, rotary spindle shaft, and the draw bar assembly is nonrotational relative to the spindle shaft. The draw bar assembly is axially movable within the hollow rotary spindle shaft, and it includes a tool holder gripping means. The draw bar assembly rotates with the hollow rotary spindle shaft during a machining operation. The draw bar assembly with its tool holder gripping means is moved by an actuator means between an operative position for retaining a tool holder or the like in the spindle shaft, and an inoperative position to permit a tool holder or the like to be removed from or inserted into the spindle shaft. A spindle shaft holding or gripping means retains the hollow rotary spindle shaft in a stationary position when the draw bar actuator means moves the draw bar assembly between said operative and inoperative positions.

Abstract: A pair of gripper jaws are pivotally mounted on a machine tool spindle within a central bore that opens into the toolholder socket on the outer end of the spindle. The gripper jaws have serrated outer ends that extend into the toolholder socket in position to engage a threaded opening in the inner end of a toolholder which is to be clamped in the toolholder socket. Cam surfaces on a drawbar which extends between the gripper jaws interact with cam follower surfaces on the gripper jaws to cause the gripper jaws to move radially outwardly to clamp the toolholder within the toolholder socket when the drawbar is moved axially away from the toolholder socket. The gripper jaws have axial play therein. The drawbar is spring biased axially away from the toolholder socket to clamp the toolholder in the toolholder socket and press the toolholder against the margins of the toolholder socket.

Abstract: A machine tool high speed spindle assembly and draw bar assembly, wherein the spindle assembly includes a hollow, rotary spindle shaft, and the draw bar assembly is nonrotational relative to the spindle shaft. The draw bar assembly is axially movable within the hollow rotary spindle shaft, and it includes a tool holder gripping means. The draw bar assembly rotates with the hollow rotary spindle shaft during a machining operation. The draw bar assembly with its tool holder gripping means is moved by an actuator means between an operative position for retaining a tool holder or the like in the spindle shaft, and an inoperative position to permit a tool holder or the like to be removed from or inserted into the spindle shaft. A spindle shaft holding or gripping means retains the hollow rotary spindle shaft in a stationary position when the draw bar actuator means moves the draw bar assembly between said operative and inoperative positions.

Abstract: A tool holding assembly wherein a self-locking chuck or tool holder is releasably secured in a rotary spindle by a draw bar and collet type tool holder gripping means. The self-locking chuck is provided with a spring-biased, ball locking means that functions as a safety retainer means for holding the chuck or tool holder in the spindle in case of a breakage of the collet type tool holder gripping means. The spindle is provided with a tapered seat against which the balls of the ball locking means are normally urged by a spring biased plunger that is movable to a ball unlocking position by the draw bar.

Abstract: An end mill tool holder body and a tool suitable for use in a boring mill or any other metal-cutting machine. The tool has a round body with shank to suit the machine tool and a flat, laterally-disposed surface at one end of the body terminating in a shoulder. An axial bore extends through the body and a draw bar in the bore has a pin which extends through an opening in a cutting insert and a nut on the other end of the draw bar clamps the cutting insert against the shoulder, holding it rigidly in position for milling or boring.The inserts are of the throw-away type and are made of precision dimension so that the body and cutting insert can be used in a computerized operation.

Abstract: A quickly attachable and releasable assembly for attachment to a spindle head includes a plug casing insertable into the spindle head, a stop nut thereon, and two bushings loosely connected to the nut. One bushing carries a plurality of locking balls and the other bushing has a cam surface to urge the balls inwardly to engage the head. A spring urges the bushings apart to cause the cam surface to so operate.

Abstract: The drill bit extension which utilized a length of conventional pipe or thin wall conduit without modification. A chuck adapter fitting and a drill bit adapter fitting are located at opposite ends of the pipe. Both have a pilot portion adapted to extend into the pipe, and a threaded tapered portion which engages the pipe interior. The chuck adapter fitting has a reduced shank to be received in a conventional drill chuck; and the drill adapter fitting has an opening with means for locking a drill bit into the fitting. Since the fittings are used with an unmodified pipe, the pipe section can be used in drilling the holes and then left in place after the fittings are removed. In this manner, water lines and electrical conduit may be installed simultaneously with drilling the required holes therefore.

Abstract: A drilling tool, particularly for working metals, in which a tool holder is provided at its frontal or end surface with a receiving slot which is open on three sides and in which an interchangeable blade type drill bit is fastened. A bar-shaped adapter is symmetrically inserted into the receiving slot between the drill bit and the bottom surface of the slot. The adapter extends laterally beyond the periphery of the tool holder with one end surface abutting the bottom surface of the slot and the opposite end surface contacting and providing an abutment for at least the portions of the blade shaped drill bit which extend laterally beyond the periphery of the tool holder.

Abstract: A reamer having a tool shank and a detachable reamer head in which the shank is provided at one end with means to be engaged by the spindle of a machine tool and at the other with a sleeve defining a conical socket and the reamer head has an integral conical butt for engagement in the shank socket, the butt being detachably secured in the socket by means of a rigid force transmitting member extending lengthwise of the tool shank and connected at its ends to the reamer head butt and an axially movable screw threaded counterpiece engaged in screw threaded fashion on the shank so that rotation of the screw threaded counterpiece exerts a longitudinal force to draw the reamer head butt into and out of the conical head socket. Cooperating detent means are provided on the reamer head butt and tool shank sleeve to prevent relative rotation therebetween.

Abstract: This invention relates to a head-stock for a milling and boring machine, comprising a body in which a boring spindle and a milling sleeve or spindle arranged around the boring spindle are mounted to rotate, wherein a tubular member is mounted to rotate around the milling sleeve or spindle to which tubular member is secured a ring which is of large diameter and which is situated in the front face of the body, said ring being capable of being connected selectively to means for driving it round at high speed for machining purposes and to means for driving it round at slow speed for indexing purposes.

Abstract: A chucking device comprising an axially displaceable draw-in bar mounted inside a hollow tool spindle and carrying a coupling head which is adapted to positively engage the tool shank. The tool in such a device is chucked by inserting it into the socket in the tool spindle, coupling it with the draw-in bar which has been advanced into a forward position and by retracting the draw-in bar to draw the tool firmly into the socket in the tool spindle. The action of releasing the tool comprises the same steps but in the reverse order.

Abstract: A tool holder for easy and quick insertion in and removable from a high speed spindle of a machine tool. The tool holder is positively driven by the spindle by means of a quickly engagable and disengagable clutch. A drive adapter is insertable in the bore of a conventional spindle and has a drive clutch element which is disengagably connected with a complementary drive clutch element of the tool holder. The tool holder also has a resilient, flexible means in the form of an O-ring which frictionally engages the interior of the spindle so as to prevent inadvertent removal of the tool holder when reverse rotational forces are applied on the tool or at lower speeds of the spindle. The resilient, flexible means is centrifically urged in tight frictional engagement with the spindle when the latter is operating.

Abstract: An adaptor for a hand-operated power machine tool, such as a power screwdriver, comprises a sleeve adapted to receive a cutting tool bit in the forward end and an aperture for slidably engaging the shank of the screwdriver bit in the rearward end. The sleeve preferably also comprises a concentric bearing-mounted grip allowing free relative motion between the grip and the sleeve. The adaptor is used for performing a series of operations where a guide cutting is first made in a workpiece, and then a screw is driven into the guide hole.

Abstract: A rotary cutter is disclosed herein having a hollow body adapted to be mounted on to the chuck of a power driven device such as a hand drill or the like. Within the hollow of the body, there is a metallic and magnetic member formed with a central slot or groove. A circular cutter is insertably received within the hollow of the body and includes projections which make and engage with the slot of the magnetic. The circular cutter is maintained in position on the body by the force of magnetic attraction and the rotating power of the body is imparted to the circular cutter by engagement of the projection in the slotted magnet. A circular cutter includes a tapered cutting edge which is disposed outwardly from the body so that only the circular cutting edge will engage with a work piece.

Abstract: An adjustable tension and/or compression tap holder includes a shank adapted for rotative drive and longitudinal feed and mounting a drive socket at one end. A cylindrical carrier slidably nested within said socket and has a series of drive slots which receive a corresponding series of drive balls nested within said socket interconnecting said shank and carrier for rotation in unison and providing for longitudinal adjustment of the carrier relative to the socket. The carrier is adapted to receive a tap retaining bushing. A tension and compression adjusting screw is nested within said shank and at one end, loosely secured upon said carrier. A tension and compression adjusting nut is threaded into said shank and is interconnected with said screw so that rotation of the screw will effect longitudinal adjustment of the adjusting nut.

Abstract: A machine tool includes a head which supports a vertically movable quill within which there is disposed a rotatable spindle to which various kinds of cutting tools may be attached. Within the quill there is provided a spring-biased annular piston for operating actuating means that are connected to clamping members for clamping onto and for releasing tooling from the spindle when it is in its locked position.

Abstract: A cutting tool holder comprising an elongated holder body having a shaft receiving bore extending longitudinally therethrough, an elongated tool mounting shaft adapted to receive at least one cutting tool in a fixed position thereover and means for releasably retaining the mounting shaft in position within the holder body. The holder body is affixed to a metal removal or cutting machine by convenient conventional means with cutting tool positioned relative to a workpiece as desired. The holder may include means which permit a plurality of cutting tools to be simultaneously mounted on the shaft to accommodate the performance of a plurality of metal removal operations. The tool holder may also conveniently include a micrometer-like arrangement between the mounting shaft and holder body to provide indication means as to relative location of the cutting tool from a first normal position and means for supplying a continuous coolant fluid flow to the cutting tool.

Abstract: A trepanning tool is adapted to receive attachments for performing boring operations on trepanned holes. The attachments interengage with the trepanning unit to establish a boring diameter concentric with, and adjustable with respect to, the trepanned diameter without removing the trepanning cutter.