Abstract: A trepan is mounted on the turret of a lathe-type machine tool for cutting a trepan groove in a stainless steel fitting used to couple a hose to a pipe. The cutter is secured to the turret by a holder which comprises a base having a longitudinally extending mounting foot and a transversely extending dovetail slot in which is mounted a dovetail slider having a longitudinal slot that restrains a trepanning cutter holder in which the trepanning cutter is mounted. An adjustment screw mounted for rotation only on the base, and threaded into the dovetail slider, provides for axial adjustment of the trepanning cutter and an adjustment screw mounted for rotation only on the dovetail slider, and threaded into the trepanning cutter holder, provides for longitudinal adjustment of the trepanning cutter.

Abstract: A boring bar holder for use with a lathe has a massive metal block with a generally triangular cavity extending transversely across the block. Inside the cavity a pair of diagonally extending surfaces are defined by the inside of upper and lower walls which intersect one another along a centering line. A U-shaped clamp rides in longitudinal grooves on sides of the block providing legs that have contact surfaces on ends of the legs. When the U-shaped member is forced forward, ends of the legs and the upper and lower wall grip the boring bar from three sides, causing the bar to be forced into position parallel to a centering line. A wide size range of boring bars can be held by this device with minimal adjustment, and change-out of bars is readily carried out when needed.

Abstract: A tool support adapted for use with a tool holder having an elongated shank which is mounted in a machine tool, is useful to support an insert for cutting deep grooves in a workpiece. The tool support has a body having a central body portion and a second body portion extending from the central body portion, which second body portion has a first surface portion adapted to support an insert thereon and a second portion extending arcuately from the first surface portion which is adapted to enter arcuate or circular spaces or grooves formed by the tool in a workpiece. The body portions are preferably integral and preferably includes a portion which engages the tool holder and inhibits vertical movement of the tool support relative to the tool holder and a third body portion adapted to cooperate with a clamping member to clamp the insert to the tool support.

Abstract: A clamping device for the cutting tools of machine tools having a tool block which can be affixed by clamping elements to the clamping plate of a machine tool carriage, or the like, and which has first guidance means which cooperates with second guidance means of the clamping plate. To prevent bending moments in the tool block and the clamping plate, as well as high surface pressures between the tool block and the clamping plate due to high clamping forces, while still making precise guidance possible, the tool block and the clamping plate have flat clamping surfaces and one of the guidance means is connected to the tool block or to the clamping plate, respectively, so as to be moveable transversely to the clamping surfaces, but immoveable parallel to the clamping surfaces. This ensures that the guidance means always mate without free play, but do not transmit clamping forces.

Abstract: A device for stopping automatically an overloaded lathe comprises a support base, a front holding base, a rear holding base eccentric cam, a locating block, and a lathe tool. The front holding base is fastened with the front end of the support base by means of a screw which is fitted over by a resilient washer. The lathe tool has a handle which is fastened at the front end thereof with the front holding base. The rear holding base eccentric cam is fastened with the rear end of the support base by means of a screw which is fitted over by a resilient washer. The handle of the lathe tool is urged at the rear end thereof by the rear holding base eccentric cam. The locating block is fastened with the support base and is provided with a proximity switch having an electric circuit connected with the electric circuit of the main shaft motor of the lathe. The rear end of the handle of the lathe tool is urged by the locating block.

Abstract: A bar peeling tool includes a rotatable cutter head with circumferentially spaced cassettes. Each cassette comprises a toolholder and an adjusting device. The adjustment device comprises a setting unit provided with a protrusion which fits into an end of the toolholder. The protrusion includes a recess in which a wedge element is slidable. By sliding the wedge element, the toolholder is adjusted along a longitudinal axis of the cassette. Sliding of the wedge element is performed by means of set screws mounted in the toolholder at opposite ends of the wedge element. A clamping screw extends between the setting unit and the toolholder for clamping the wedge in the radial direction.

Abstract: A lathe tool having a cylindrical shaft and a head with a contact surface which rests against a support surface on the shaft. The tool head is detachably connected in force-locking fashion by means of a fitted screw to the tool shaft. The contact surface and the support surface are disposed at an acute angle to the axis of the shaft and have mutually engaging straight tooth systems which extends over the whole cross-section of the shaft. The parallel teeth of the tooth system are perpendicular to the direction of slope of the support and contact surfaces and parallel to a surface disposed with its axis parallel to that of the tool head and including an indexable cutting insert.

Abstract: In a tool holder support assembly, a horizontal slide member connects to a machinery table with a T-slot connection, and a vertical support post connects to the slide member with a sliding dovetail joint. The slide member and post are fixed together by a wedge that extends from the post and presses transversely against a sloped surface of a dovetail protrusion on the sliding member, when a bolt is rotated. The slide member is fixed to the machining table by engaging a nut located in the T-slot with a bolt passed through the slide member. Alignment is provided between the machining table and slide member by abutting external surfaces.

Abstract: A lathe includes an auxiliary transverse table at an opposite side to a transverse table. The auxiliary transverse table includes an auxiliary tool carrying an abrasive on one end thereof positioned at the opposite side to a machining tool of the transverse table. A workpiece is machined in a high straightness degree since the auxiliary tool of the auxiliary transverse table supports the workpiece on the opposite side to the tool of the transverse table which performs machining the workpiece. In addition, the machining time period as well as the number of machining processes on the workpiece can be reduced since the abrasive on one end of the auxiliary tool gives final touches to the workpiece during machining.

Abstract: A cutting tool holder is composed of a cutting tool holder main body 1 and a bracket 2 mounted to the top of a front end portion of the main body, which are fixedly secured to each other by a clamping bolt 3 and a knock pin 4. At the front end portion of the cutting tool holder main body 1 is provided a plane inclined with respect to the bottom surface of the main body 1 and a dovetail groove to be used for mounting a cartridge. A lower stopper 5 and a lower pressor metal 8 are provided for positioning and fixing the lower portion of the cartridge when inserted into the dovetail groove. The bracket 2 is provided with an upper stopper 6 and an upper pressor metal 10 for supporting and fixing the upper portion of the cartridge. In the cartridge, a hollow rotary shaft 13 is fitted around a washer-faced rigid shaft 12 via bearings. A circular die throw-away tip 14 is fitted around the rotary shaft 13 and is fixed to the rotary shaft jointly with a chip breaker 16 by a nut 15.

Abstract: The present invention entails a tool holder adapted to be inserted within the tool slot of a lathe turret. The tool holder includes a detachable cutting unit and a clamping unit. Forming a part of the clamping unit is a pair of wedge blocks disposed within wedge cavities formed within the clamping unit. The wedge blocks are movable via screws from an inner relaxed or disengaged position to an outer position where the wedge blocks engage the tool slot and through a wedging action function to secure the tool holder within the tool slot of the lathe turret.

Abstract: A sealing bushing is provided for use with a liquid cooled metal cutting tool of the kind having an elongated tool shaft for mounting with respect to a machine tool turret and formed with a cooling duct, the sealing bushing comprising a tubular member and an annular channel member formed integrally with and surrounding an end portion of the tubular member; the channel member being constituted by the end portion and a skirt portion radially spaced from the tubular portion and integrally coupled thereto by a flange portion, at least the skirt portion being formed of a flexibly resilient material.

Abstract: A micro-machining center, in the form of an automatic screw machine, utilizes an array of tools and machining support mechanisms removably mounted on a carriage movable parallel to a first axis, and a spindle/collet mechanism movable parallel to a second axis, with machining and manipulating operations being conducted at the intersection of the two axes in a common plane. A microprocessor control system having multiaxis command capability precisely drives the carriage and spindle/collet mechanisms separately or concurrently to perform a sequence of supported machining functions for fabrication of a given part from stock. With this arrangement of microprocessor, tools and spindle/collet mechanism commands for manufacture of a part can readily be generated, verified, used and retained in storage for later use.

Abstract: In a tool arrangement, an end part of a holder shaft is provided with a seat which provides a stable support for a cutter insert in at least two of the principal directions utilized in a machining operation. Stresses imposed on the cutter insert during the machining operation are transferred in an effective fashion to the shaft. The arrangement includes at least one tightenable fastening device which, after tightening, engages with the cutter insert and forces it against at least one surface of the seat. The cutter insert has stop parts with which the fastening device is intended to engage only after the cutter insert, through displacement relative to the seat on the shaft and whilst the cutter insert still in contact with the seat, has reached its operating position.

Abstract: A hydraulic chuck for securing a lathe shaft and cutting tool to a tool holder is provided with spray nozzles to project cooling fluid on the cutting tool.

Abstract: A cutting tool for simultaneously forming a plurality of deep, narrow, closely spaced parallel grooves in a hard, brittle substrate material comprises a rigid housing which defines a plurality of closely spaced cutting blade cavities, each of said cavities being constructed to receive and rigidly hold a cutting blade therein, and cutting blades rigidly mounted in each of said cavities.

Abstract: A gang tooling is disclosed for a lathe having a main spindle with an axis of rotation, a longitudinal carriage movable along a z-axis parallel to the spindle axis and a cross-slide carried by the longitudinal carriage and movable along a x-axis transverse to the spindle axis. The gang tooling comprises a longitudinal plate for removably securing to the cross-slide. The plate has a dovetail mortise and a wedge that cooperates with a dovetail tenon on the cross-slide for removably securing the plate to the cross-slide. The plate has a dovetail tenon for cooperating with a dovetail mortise in a plurality of tool holders for removably securing the tool holders to the plate. The plate can be removed from the cross-slide without disturbing and removing the tools installed on the plate, thereby permitting the tool holders to remain secured to the plate at their original relative positions.

Abstract: An apparatus and a method for controlling machining chip and the length of such chip make use of a lathe tool support on which an electromagnetic tool mount is disposed. The electromagnetic tool mount comprises a front clamping block and a rear clamping block for holding a machining tool. An electromagnetic coil located between the front and the rear clamping blocks is provided at the center thereof with a throgh hole for receiving the machining tool. The resumption and the interruption of power supply to the electromagnetic coil are regulated by the amplified signals sent out by an oscillation controlling circuit. The magnitude of power voltage and the cycle of power resumption of the electromagnetic coil are so adjusted as to facilitate the magnetization and the demagnetization of the machining tool. The machining chip is broken by a magnetically induced thrust and a shearing force generated by the rotation of the machining tool.

Abstract: In order to improve a device for the non-circular machining of workpieces comprising a machine frame, a workpiece spindle held on the machine frame and operated as C-axis for a workpiece to be machined, a Z-slide displaceable on the machine frame in the Z-direction in relation to the workpiece spindle and having a Z-axis drive, an X-axis drive in the form of a linear motor arranged on the Z-slide for advancing a tool in the X-direction towards the workpiece, and a numerical control system for activating the X-axis drive in correlation with the rotation of the workpiece spindle, such that more precise work results are obtained, it is proposed that the linear motor serving as X-axis drive be a three-phase asynchronous linear motor with a primary part fixedly arranged in the X-direction on the Z-slide and a secondary part movable relative to the primary part.

Abstract: A vibrating cutting tool capable of making uniform micro-vibrations at the cutter edge generated during machining. The vibrations at the cutter edge are transmitted to balls biassed by springs, compressing the springs. The vibrations are transmitted from the balls through the output shaft back to the cutter edge. While the cutting force is small, the amplitude of vibration of balls is relatively large. When it increases, the holder acts on the balls more than the spring does so that vibration is suppressed. As a result, the amplitude of vibration becomes uniform.

Abstract: The invention relates to a device for removably securing a tool (12) to the spindle (10) of a machine tool with a fitting aperture (16) concentric with the spindle axis, a fitting pin (18) engaging in the fitting aperture (16), two clamping bolts (26) arranged in the fitting pin so as to be radially movable towards opposite sides, a clamping member (32) movable axially by means of a tensioning mechanism fitted on the spindle side and two tapered surfaces (48, 30) fitted on the clamping member (32) on the one hand and on the clamping bolts on the other for the radial adjustment of the clamping bolts (26) between a release position withdrawn in the fitting pin (18) and a clamping position shifted radially outwards.

Abstract: The present invention entails a tool holder adapted to be inserted within the tool slot of a lathe turret. The tool holder includes a detachable cutting unit and a clamping unit. Forming a part of the clamping unit is a pair of wedge blocks disposed within wedge cavities formed within the clamping unit. The wedge blocks are movable via screws from an inner relaxed or disengaged position to an outer position where the wedge blocks engage the tool slot and through a wedging action function to secure the tool holder within the tool slot of the lathe turret.

Abstract: An apparatus preventing a lathe tool from being damaged is composed of a lathe tool support provided thereon with a front chucking stand and a rear chucking stand, which are used to hold the lathe tool. The front chucking stand has an opening which receives the lathe tool and divides the front chucking stand into a first chucking block and a second chucking block. The first chucking block has a pivot shaft pivoted to the lathe tool support while the second chucking block has a thin strain gage attached to a surface thereof. The rear chucking stand has a front end with a through hole for receiving the rear end of the lathe tool and has a rear end having an actuating board welded thereto. The lathe tool support is provided with at least an electromagnet and a spring for pulling the actuating board.

Abstract: An improved combination mill-lathe type machine tool including a work piece carrier carrying an elongate work piece on a turning axis; an elongate rotatable cutting tool carrier with an inner end and rotatably carrying a cutting tool on a rotating axis; and, an adjustable device to move the cutting tool carrier and tool into working position relative to the work piece and to feed the tool longitudinally thereof; said device includes a compound table with a plate movable on a plane along axes parallel with and normal to said turning axis, a first L-shaped pivot mount with a base pivotally mounted on the plate on a first swivel axis normal to the plate and with a leg spaced radially from and parallel with said first swivel axis, a second L-shaped pivot mount with a first arm parallel with and rotatably carried by said leg on a second swivel axis that is normal to and intersects the first swivel axis, and, a second arm carrying the cutting tool carrier with its inner end disposed toward the point of intersection

Abstract: A stand (10) that includes an upwardly projecting support member (24) shaped into wedge portions (36, 38), each wedge portion configured to fit within the groove (18) formed in a conventional holder (14) for a lathing tool. The stand (10) provides a compact and convenient mechanism for storing holders that are not fastened to the lathe.

Abstract: The tool holder of modular construction of driven tools for use on lathes consists at least of one base holder and various tool heads connectable interchangeably therewith. The base holder has a fixing shank, an attachment flange connected thereto, as well as a drive shaft rotatably mounted therein. Each tool head has at least one rotatable tool receptacle in a housing and a drivable shaft connected thereto. On the mutually facing ends of the drive shaft and the driven shaft there are provided coupling parts which can couple without relative rotation therebetween. The driven shaft is provided on the input side with a support pin freely projecting beyond the associated coupling part. The drive shaft is provided in the region of the attachment flange with a coaxial support bore, into which is received the support pin of the tool head.

Abstract: An active vibration control device for controlling vibration in a cantilevered member and a method for the same are disclosed. The device is comprised of a cantilevered member having a longitudinal axis comprising a sensor mounted near the free end of the member to measure motion of the member in a transverse direction and to produce a corresponding signal. A force generating assembly is mounted to the member near the free end to oppose the measured motion with a force thereby minimizing subsequent motion along the transverse axis caused by vibration.

Abstract: A cutter apparatus for use in providing woodworking patterns within a workpiece includes a cylindrical base member formed with a cylindrical collared shank coaxially aligned and orthogonally mounted to the top end portion of the cylindrical base member, with a cylindrical support shank diametrically directed orthogonally relative to the cylindrical base member, with the cylindrical support shank including a forward end mounting a cutter blade replaceably thereto, with a rear terminal end of the support shank mounting counter-balanced weights in adjustable relationship for counter-balancing the organization in use.

Abstract: A variable tool bit holder which takes the place of up to eight standard tool bit holders for machining a workpiece including a shank member having a generally elongated rectangular configuration, and a groove positioned on an end portion of the shank member and comprises an end groove portion extending across an end surface of the shank member and side groove portions extending horizontally on the left and right side surfaces of the shank member toward the opposing end surface for a distance at least equal to the end surface groove portion; a support blade having top and bottom surfaces each defined by a frontally disposed V-shaped bit-receiving forward edge portion and a rearwardly disposed planer top surface disposed above the plane of the bit-receiving surface; a transversely projecting elongated rib extending longitudinally along the inner side of the support blade and adapted to be inserted in a selected groove portion and releasably secured thereto; an insert bit having opposing cutting tips and a V-sh

Abstract: A light-weight, highly rigid tool slide for a machine tool is provided which may be machined with a high degree of precision, whereby lateral play or "wobble" of the tool is reduced. The tool slide comprises an elongated slide member slidingly carried in a substantially cylindrical channel formed in the surface of a base member. A cover member covers both the channel and the slide member, which has a flat surface machined therein so as to conform to the shape of the covered channel. The channel in the base member may include an enlarged middle portion to reduce surface contact with the slide member and to provide space for lubricating material. A through-bore may be formed in the slide member to reduce its weight. An encoder monitors the rotational angle of a workpiece and drives a numerical controller and servomotor to move a cutting tool inward and outward in synchronism with the rotation of the workpiece.

Abstract: Toolholder for an automatic lathe, in which the body of the toolholder has on its bottom side a projecting rib extending parallel to the axis (X) of the workpiece to be machined and the projecting rib may be coupled with a groove formed in a retaining support of the machine and oriented parallel to the axis of the workpiece, wherein moreover the retaining support receiving the toolholder has parallel grooves which are oriented radially with respect to the axis (X) of the workpiece to be machined and wherein strips can be inserted in these grooves, with which screws can be engaged for clamping the toolholder.

Abstract: In the present invention, a tool holder assembly is provided with a mechanism for adjusting the angular orientation of the tool holder with respect to the longitudinal axis of the tool holder. A tool mounting sleeve adapted to receive and hold a standard tool holder is rotatably mounted to a tool block. A shaft extends from the rear of the sleeve and projects from the tool block. A pivot arm is fixedly secured at one end to the shaft and is pivotally secured at its other end to an adjustment block. The adjustment block moves linearly along an adjustment rod which is fixed to the tool block. Means are provided for securing the adjustment block at any position along the adjustment rod. The mounting sleeve, and thus the tool holder, can be rotated by repositioning the adjustment block along the adjustment rod.

Abstract: An elongated tool block for use in metal grooving, parting, turning or boring operations and being of the kind consisting of two component blocks which, when screw coupled together, also clamp a holder blade thereto, one of the blocks being formed with an elongated edge surface serving to delimit an outer longitudinal boundary of a holder blade retaining groove, and having an end portion and an intermediate portion; a relatively resilient coupling portion of this one block serving to couple the end and intermediate portions together; there being furthermore provided first screw coupling means for screw coupling the component blocks together at the intermediate portion and second screw coupling means for screw coupling the component blocks together at the end portion.

Abstract: This invention relates to an adjustable toolholder for use with multiple spindle bar machines and the like. The adjustable toolholder includes a mount member adapted for securement to a toolslide of the machine, a toolholder body for mounting within a way on the mount member, and precision means for slideably adjusting the toolholder body within the way of the mount member. The toolholder body can be precisionally adjusted relative to the mount member by the mere turning of a calibrated vernier, knob, with no loosening of any through-bolts or the like.

Abstract: A mechanism for clamping a tool (e.g. a probe) and a shank together comprises a clamping pin (144), which bears against an annular lip (142) in the rear face of the probe. A shaft (148) of the pin (144) extends into the shank (150), and two diametrically opposite, radially extending clamping bolts (160) supported by the shank (150), bears against a frusto-conical clamping surface (158). The action of the bolts (160) on the surfaces (158) urges the probe and shank together. The probe and shank are adjusted laterally relative to each other by four adjusting bolts (166) supported in the annular lip (142) which bear against a flange (152). The flange (152) is provided on the shank (150) and extends into the probe (140).

Abstract: A tool holder assembly includes a first member formed with a cylindrical bore and a second member including a cylindrical portion receivable in the bore of the first member. A locator screw hole extends radially through the first member. The second member is formed with a conical face having a centerline perpendicular to its longitudinal centerline. A locator screw is threaded into the locator screw hole in the first member. The locator screw includes a conical nose adapted to engage the conical face of the second member when the locator screw is turned in a first direction. The locator screw cooperates with the conical face of the second member to radially locate the second member with respect to the first member.

Abstract: High frequency vibrations of a boring bar cutting tip are minimized by use of a damping sandwich of plural layers of steel and plural alternate layers of viscoelastic solid material. This damping sandwich is placed at a joint in the machine tool between the cutting tip and a tool mounting area, and is shown as being provided between a mounting face of a tool mounting block and a mounting area. The damping sandwich permits greater depth of cut, with greater inches per revolution of chip removal without any chatter for improved metal removal.

Abstract: A tool device has a toolholder and a profile tool detachably secured to this, both of which comprise stops cooperating with one another for the precise positioning of the cutting profile of the profile tool relative to the toolholder which can be mounted on a machine tool, the stops being constructed in the form of mating surfaces. At least one adjusting element is provided between the toolholder and the profile tool to bring the profile tool to bear on the mating surfaces on the toolholder.

Abstract: A basic tool holder for attachment in an accommodating recess of a tool support, particularly a turret head, with a base part, to which can be attached a work-holding device by one or several clamping means, between which the tool is clamped. A component of the clamping force, directed radially towards the tool support, is produced by at least one abutment face between the base part and the work-holding device forming a wedge-shaped incline for the clamping means.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: A rotary machining system is presented which uses a housing, a combined spindle and cutting disk, a source of high pressure fluid, a hydraulic line, a needle valve, a carbide ball and a carbide socket to machine superalloys and other difficult-to-machine materials and alloys at high speeds. The hydraulic lines and fluid source provide high pressure fluid through an aperture of the carbide socket into the housing to float the spindle. This fluid acts as a hydrostatic thrust bearing as it separates the spindle from the walls of the housing. Since the spindle and cutting disk are a single unit which are not physically attached to a roller bearing mechanism, they may be quickly and easily inserted and removed to minimize the "down time"0 of the system when the cutting disk needs to be replaced or ground to a sharp edge.

Abstract: A die holder comprises a die housing and a guide bar. The guide bar is designed to be retained within a Jacob's chuck retained within a lathe tailstock, and the die housing is slidably movable along the guide bar. A button die is retained within the die housing and with the guide bar aligned with the bar stock workpiece held by the lathe headstock, the die housing may be brought into engagement with the workpiece so that the button die engages the same. A user may then grasp the die holder while the headstock and workpiece are rotating so as to effect a cutting of threads. A reverse rotation of the headstock will result in a disengagement of the die holder.

Abstract: A micro-positioning tool post comprises a flexible support which performs parallel motion and supports a tool, a piezoelectric actuator for displacing the flexible support, a displacement sensor for detecting displacement of the tool, and a state observer for receiving the voltage applied to the piezoelectric actuator and the output from the displacement sensor as input, producing an estimate of a velocity signal and feeding back the estimate to the voltage applied to the piezoelectric actuator. The feedback control greatly improves the dynamic stiffness of the tool post while also providing excellent static characteristics, dynamic characteristics and static stiffness.

Abstract: A tool head is clamped in a tool holder by rotating a radial or axial clamping shaft which has spiral camming surfaces urging clamping elements outwardly to engage ramps on the pin of the tool head which is received in a socket of the tool holder. The spiral cam can be a second or higher order mathematical curve and the shaft can carry an ejection cam as well.

Abstract: The present invention is a tool assembly comprising a tool block and a tool holder capable of delivering chip-breaking fluid to the tool holder without a fixed attachment to the tool holder. The tool block is formed with a tool shank cavity having a tool support surface. The tool holder includes a shank insertable into the tool shank cavity of the tool block. A fluid delivery passage is formed in the tool block which terminate in an outlet opening. A primary fluid passage is formed in the tool holder and terminates in a discharge orifice positioned to direct a fluid jet at the chip being removed from the workpiece. A fluid path provides a path for the flow of chip-breaking fluid from the outlet of the delivery passage to the inlet of the primary fluid passage throughout the entire range of relative movement between the tool block and holder.

Abstract: The present invention entails a tool holder adapted to be inserted within the tool slot of a lathe turret. The tool holder includes a detachable cutting unit and a clamping unit. Forming a part of the clamping unit is a pair of wedge blocks disposed within wedge cavities formed within the clamping unit. The wedge blocks are movable via screws from an inner relaxed or disengaged position to an outer position where the wedge blocks engage the tool slot and through a wedging action function to secure the tool holder within the tool slot of the lathe turret.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: A machine tool includes an elongate tool holder which is mounted by a pair of spring strips for pivotal movement on a mounting. One end of the tool holder carries the tool while the other end of the tool holder is moved by an actuator via a rod. Tool positioning signals are fed to the actuator in digital form and are converted to analogue form by a digital-to-analogue converter before being applied to the actuator. The tool holder is of light-weight and low inertia and can thus effect rapid changes of tool position, so exploiting to the full the high rates of positioning signal production of modern machine tool control systems.

Abstract: The present invention relates to an automatic clamping unit of the type having a spring loaded lock rod that is movable between an unlocked and locked position. A pair of locking balls are confined about the locking rod and are operative to move outwardly for engagement with the shank of a tool holder in response to the locking rod moving from the unlocked position to the locked position. The lock rod of the present invention includes a variable sloped ramp for engagement with each locking ball. As each locking ball moves along the variable sloped locking ramp, the mechanical advantage applied to the locking balls through the ramp varies due to the variation in slope. Each locking ramp is particularly configured such that the resultant locking load exerted by the locking balls against the shank of the tool holder is relatively constant although the position of the locking rod and the force being applied to the locking rod varies.

Abstract: A tool-and-tool holder assembly includes a tool having a tool shank; a tool holder having a receiving bore arranged for accommodating a stub of the tool shank; a clamping member disposed in the stub and being movable therein, generally perpendicularly to the shank; and two clamping screws supported in the tool holder and cooperating with the clamping member for axially tightening the shank against the tool holder. Each clamping screw has a first conical face and the clamping member has recesses each bounded by a second conical face. Upon tightening the clamping screws, the respective first and second conical faces are pressed against one another for generating an axial force component urging the shank into the receiving bore. At least one of the clamping screws has a third conical face, and the clamping member has a portion projecting over one of the recesses and having a fourth conical face.