Abstract: An adjustable boring head that includes a main body member having a longitudinal axis, and a boring bar holder adjustably mounted in the main body member for slidable adjustments transversely across the longitudinal axis. A square cross-sectioned slideway is formed in an end face of the main body member for precise guidance and rigid support of the boring bar holder. The boring bar holder is a unitary one piece structure having a deep socket opening for rigidly mounting the boring bar.

Abstract: A boring apparatus comprises an elongate support body adapted to be rotatable by a machine tool spindle, a cutter mounting body releasably securable to the end of the support body remote from the machine tool spindle and is provided with a cutter guide which slidably receives a cutter therein which is constrained by the guide to be displaceable in an adjustment direction inclined to the rotational axis of the elongate support body. An adjustment member is disposed within the elongate support body and is movable along an axis substantially coaxial with the rotational axis of the elongate support body, and an interengaging coupling on the adjustment member and on the cutting tool is provided whereby movement of the adjustment member along its axis of motion induces movement of the cutting tool in its adjustment direction.

Abstract: A boring head with a longitudinal axis includes a leading cutting portion and a trailing portion. A pair of adjustable work engagement devices are releasably secured to the leading portion by individual fasteners. Individual mechanisms for adjusting the position of each of the work engagement devices in a first direction generally parallel to the longitudinal axis of the boring head, and individual mechanisms for adjusting the position of each of the work engagement devices in a second direction, generally transverse to the first direction, are provided. The first and second direction adjusting mechanisms are positioned coaxially of each other in the boring head. Each work engagement device is adjustable in the first and second directions individually and independently of the other.

Abstract: A precision boring tool for the machining of inner faces of bores with at least one cutting plate, supported by a bracing claw, is disclosed. The cutting plate (2) is tilted versus the plane running through the cutting edge (11) of the cutting plate (2) and the longitudinal axis (17) of the precision boring tool (1). Thus, the bracing claw (3) can be disposed such that it does not protrude into the chip space (4).

Abstract: To center a tool restrained within a collet coupled to a driven portion (9) which, in turn, is coupled to a driving portion (2), and to compensate for possible axial offsets of the respective portions, a coupling element connects the driving and driven portions and two first spring elements (23, 24) are located on the driving portion, two further spring elements (31, 32) are located on the driving portions offset with respect to the first spring elements of 90 degrees. Each one of the spring elements can be adjusted with respect to a centrally located counter support portion (29, 31) by adjustment screws passing through the spring elements and bearing against the counter support, to thereby position the axis of the driven portion (9) carrying the collet, in congruence with the axis of the driving portion (2) even if there are manufacturing tolerances or other offset conditions, such as tolerances in the tool clamped in the collet.

Abstract: A tool holder is disclosed having a body adapted to be rotatably driven about an axis. The body includes an axial bore at one end which is adapted to receive the cylindrical shank of a cutting tool. A radial bore in the body receives a threaded fastener which, upon tightening, abuts against the cutting tool shank to secure the shank to the tool holder body. A pair of alignment members are adjustably secured to the body and each alignment member has an alignment surface which is substantially tangent to the axial bore whereas each alignment member is shaped so that the radial distance between the alignment surface on the alignment member and the axis of the tool holder varies in dependence upon the position of the alignment member. Adjustment of the alignment members and fastener centers the cutting tool to the tool holder.

Abstract: Coarse/fine adjustment boring head employing a transverse sleeve threaded into and extending through a boring head body providing coarse incremental radial adjustment of an insert cartridge, axially oriented within a sleeve, together with a fine radial adjustment of the cartridge relative to the sleeve effected through a differential screw having differential pitch threads with lead in the same direction.

Abstract: A boring head having a diametrical bore adjacent the working end thereof for insertion and removal of two or more interchangeable cutter holders. The cutter holders are restrained against rotational movement within the bore but not axial movement, whereby rotation of a first drive member having threaded engagement with an internally threaded longitudinal bore in the cutter holder will cause radial adjustment of the cutter holder relative to the boring head. Rotation of the first device member is accomplished by rotation of a second drive member having a gear drive connection with the first drive member. A first micrometer dial on the outer end of the first drive member provides for rough orientation of the cutter holder during such radial adjustment thereof, whereas a second micrometer dial on the outer end of the second drive member provides for extremely precise measurements of such radial adjustment.

Abstract: A rotary cutting tool holder and method for precise generation of a radial cutting bit under high speed settings includes a rotary housing having an axially mounted actuating bar, a cylindrical shank with attached cutting bit rotatably mounted in a second recess within the housing and extending outwardly from the bar axis. Coupling and engaging means are matingly disposed on the bar and shank for translating axial actuating bar movement into rotational shank movement for radial generation of the cutting bit.

Abstract: The present invention is a device for adjusting eccentricity of the design axis of rotation of a rotary tool (12) with regard to the axis of rotation of a drive spindle (10). The device includes male and female members (22, 24), one matable to each of the spindle (10) and the tool (12). The male and female members (22, 24) are adjustable relative to each other to vary the eccentricity and to maintain the tool (12) wherein it is not canted relative to the axis of rotation of the spindle (10).

Abstract: A tool kit is provided for repairing the snap ring grooves of a cam follower bore in a diesel engine cylinder head without removing the cylinder head from the cylinder block. The tool kit includes a cutting tool which will both enlarge the cam follower bore to allow the use of an oversized spring retainer and cut an enlarged snap ring groove to allow the use of a more substantial plate-type snap ring. A snap ring installation tool allows for easy placement of the snap ring in the cam follower bore. A concentric wrench having concentric yet independently movable sockets for quick valve and fuel injector clearance adjustment is included.

Abstract: A rotating toolhead on a preferably longitudinally movable headstock of a machine tool is disclosed. The machine tool includes at least one head carriage radially movable on the toolhead with at least one toolholder on the carriage. A motor for advancing the head carriage is operatively connectable to a drive transmission, and an axially movable driver is associated with the drive transmission and engages a ring arranged rotation-fast and longitudinally movable on a main spindle. An angular drive transfer engages with inclined planar teeth in corresponding teeth of the head carriage for movement thereof. Several groups of toolheads are also disclosed which can be arranged to form a machining line.

Abstract: A boring head of a multiple-operation machine tool comprises a housing which accommodates a carriage carrying a mandrel for a cutting tool, and having a slanted surface to interact with a slanted surface of a rod arranged in the housing coaxially with the carriage and kinematically coupled to a drive which moves it in the axial direction. The housing also accommodates a fork arranged coaxially with the former and pressed against the carriage by a spring. At the ends of the fork are two slanted surfaces which are symmetrical with respect to the axis of rotation of the boring head. The fork interacts with the carriage on lines found in a plane extending through the axis of rotation of the boring head. The head further incorporates a rocker whose axle is installed in the housing on the side facing the two slanted surfaces of the carriage. The axle is parallel with the axis of rotation of the boring head.

Abstract: Adjustment of the radial position of the tool bit is accomplished by insertion of the bit in a recess of a clamping shoe which clamps the bit against a shoulder in the cutter head. The clamping shoe has an extension which is rotatably mounted in a recess in the cutter head. A single wedge-shaped adjustment member rotates the clamping shoe with the cutter blade thereby changing the radial distance between the cutting edge and the axis of rotation of the tool.

Abstract: In the known, adjustable, single-cutting-edge machine reamers having a turnable cutting plate, the adjusting and re-adjusting operations are awkward and associated with difficulties because, at least as far as adjusting is concerned, adjustments have to be made at two points, and moreover for adjusting to the set desired value it is generally necessary to proceed in a step-by-step manner, gradually working ones way up to the desired value. These problems are due to the fact that adjustment can in principle only be made in the forward direction, that is to say in the direction of increasing diameter, whereas reverse adjustment in the proper meaning of the term is not possible but can only be achieved indirectly by carrying out a new adjustment with a lower starting value and adjusting in a forward direction.

Abstract: A boring tool for producing undercuts in preformed holes. The boring tool has a cutting element which is provided at one end of a driving shaft. In order to produce the undercut, the driving shaft can be deflected at right angles to the axis thereof via a deflection mechanism. The deflection mechanism is accommodated in the boring tool, and is provided with a longitudinally displaceable deflection rod for positively deflecting the driving shaft. In the deflected position, the driving shaft is driven by a rotary drive which is separate from the turning drive. As a result, the undercuts can be very precisely produced.

Abstract: An adjustable boring bar is disclosed having a hollow case with an integral shank and a tool supporting nose receivable in the case. An adjusting pin is mounted on the case and threadably received in the nose such that it can be pivoted between adjusted positions, and precisely moved between lateral positions in the case. A draw pin in the case passes through a lateral opening in the nose for preventing removal of the nose from the case. A collar locks the draw pin in a locking position. The position of the tool can be adjusted longitudinally, transversely, and pivotally with respect to the shank.

Abstract: A tapered thread cutting machine includes a multi-part rotary machining head, one part including a through-recess and another being a separable interior wear plate. Interacting chaser holders are mounted in the recess and include angled V-shaped slots in which block type chasers may be secured between clamps and locating pins enabling the chasers to be removed and replaced without removing the holders from the recess. The holders are driven by a linear cam for opening and closing movement through a thrust block mounted on a guide rod, such thrust block being fitted in a slot in one holder but otherwise not secured thereto so that binding in the opening and closing of tool holders is minimized.

Abstract: A tool is disclosed that offers precision fine adjustment of a cutting tool bit on the tool, having an opening provided with a conical seat, an internally-threaded tool adjustment cartridge having a conical surface engageable with the conical seat, an externally-threaded tool ajustment member threadably engaged within the cartridge, a tensioning mechanism for maintaining the conical surface in self-centering engagement with the conical seat, external gear teeth on the cartridge, and a worm wheel engageable with the external gear teeth of the cartridge to provide for very small movements of the cartridge. Fine adjustment can be performed automatically or manually, and may be performed by access to either axial end of the tool, or to the side thereof adjacent the tool bit.

Abstract: The output shaft of a rotary drive motor is connected to a screw shaft which is disposed on the same axis as the output shaft. The screw shaft is rotatably mounted in an axial bearing in a housing, and engages an internal screw element (nut) fixed to a thrust body which is axially displaceable in the housing. A drive rod is rotatably mounted in the thrust body. In order to reduce the longitudinal dimension of the device, the free end of the screw shaft extends into a bore hole in the end of the drive rod, which rod serves to axially displace a thrust bar for adjusting a drilling tool in a drill head.

Abstract: Structure for and method of mounting and actuating a spring loaded drawbar actuated boring and grooving tool on a spindle which spindle includes a machine tool hydraulically actuated drawbar therein, wherein there is no positive connection between the spring loaded boring and grooving tool drawbar and the machine tool drawbar, facilitating angular alignment of the boring and grooving tool and spindle with the boring and grooving tool in surface to surface contact with the spindle. The spring loaded drawbar is resiliently urged toward the machine tool hydraulically actuated drawbar to actuate grooving bits on the boring and grooving tool.Leakage of air under pressure between the drawbars is sensed as an indication of a worn or broken grooving tool.Guiding and assuring concentricity of the grooving bits is accomplished from the outer end of the boring and grooving tool by rectangular boring bits secured in angularly spaced apart relation around the outer periphery of an end cap.

Abstract: An internal grinder for grinding or polishing the inner surface and the like of a cylinder or ring gauge. A plurality of grind stones (256) are held by a grind stone holding member (251) in a manner to be movable in the radial directions of a spindle (203) and a projection value adjusting member (241) having engaged therewith the plurality of grind stones (256), respectively, is rotated relative to said grind stone holding member (251), whereby the plurality of grind stones (256) are adjusted in their projection values.

Abstract: A unique boring bar is disclosed which comprises a body having a generally radially extending formed through it at one end. A slide member is axially slidably positioned within the body throughbore and a standard cutting tool is secured to the slide member. In addition, one end of the slide member is externally threaded and threadably cooperates with an annular dial. The dial is locked against axial movement with respect to the body so that rotation of the dial axially displaces the slide member with its attached cutting tool.

Abstract: A boring tool or like rotating tool, especially for a NC machine, is provided with a laterally projecting plunger which can be brought into contact with an abutment of the machine by the tool position mechanism therein to operate a stepping mechanism within the tool and correct the position of the cutting edge therein.

Abstract: A tool has independently radially adjustable cutting edges. Adjusting drives are provided for each cutting edge. Each adjusting drive is laterally spaced from, and axially overlaps, an adjacent adjusting drive. Each adjusting drive comprises a servomotor which directly drives a screw. A screw nut is axially movable on the screw and is rigidly connected by means of a bridge with an adjusting piston arranged parallel thereto. The adjusting piston is axially movable and is connected by a bearing to a tubular connecting rod. Axial movement of the latter serves to radially adjust an associated cutting edge of the tool. The connecting rods of the adjusting drives are coaxially and telescopingly arranged.

Abstract: A boring tool includes a central shaft which carries a tool head on a shaft working end and which is mounted in a rotatable bushing for eccentric movement in the tool body. For work adjustment up to 1.00 inch on diameter, the tool head is radially slidable on the working end of the central shaft by an adjustment screw arrangement while the shaft is held by the bushing. For micro-adjustment, the bushing is rotated to move the shaft working end in an eccentric path with a key on the tool body translating this movement into radial micro-adjustment of the tool head to 0.0001 inch.

Abstract: A skiving tool having a retractable knife for use in combination with a roller burnishing tool for finishing the internal surface of a cylindrical hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion. A push dart has a camming element with complementary camming surfaces which rides along the camming path. Axial actuation of the push dart causes the knife holders to extend radially into a stable, locked position. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. A plurality of frustoconically tapered rollers are arranged about the outer surface for rolling engagement with the outer surface with the smaller ends of the rollers facing forward. The taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis.

Abstract: The boring head has a tool holder in which the cutting tool is retained by a clamping screw. The tool holder is radially adjustable by an adjustment screw having a fine thread. The adjustment screw has a flange and a pressed-on knob which bears an adjustment scale. Between the knob and the flange, the annular portion of an insert is introduced, free of axial play. The annular portion of the insert is connected to the boring head by a set screw.The insert with the annular portion also is provided with a clamping lip which can be pressed against the tool holder by a locking screw. The tool holder with its fine adjustment can be separately mounted and constitutes an easily replaceable unit.

Abstract: An adjustable insert cartridge is described in which a toolholder shank is threadedly engaged in a threaded adjusting sleeve having a flange with a rearwardly facing face. The rearwardly facing face is in rotatable sliding engagement with a forwardly facing face on a mounting collar which is attached to a boring bar. The rearwardly and forwardly facing faces are held in abutment by a spring which is compressed between a rear face of the mounting collar and an adjusting ring threadedly engaged on the adjusting sleeve.

Abstract: A boring cutter which is adapted to be rotated about its central axis includes at least one insert pocket having opposed parallel leading and trailing walls, as well as a bottom wall. An insert seat of generally L-shaped configuration is provided, with the leading surface of the insert seat being in abutting relationship with the leading wall of the pocket. The opposed trailing surface of the insert seat includes both a leading and rear locating support surface adapted to receive an indexable cutting insert. A wedge is receivable between the rear surface of the cutting insert and the trailing wall of the pocket. The radial position of both the insert seat and the wedge, relative to the central axis of the boring cutter is adjustable. By this arrangement, the radial position of the cutting insert may be varied to thereby adjust the effective outer diameter of the boring cutter.

Abstract: The cutting head of a boring tool has a cylindrically arcuate face about the axis of rotation and a radially and axially open groove for release of cooling fluid and chip removal. A single cutting plate is releasably recessed in one wall of the groove and a clamping jaw in the other wall in abutting engagement with the blade whose edge has a primary cutting portion axially projecting from an end portion of the cutting head and a secondary cutting portion radially projecting from the arcuate carrier face.

Abstract: A micro-adjustable boring bar with an interchangeable head and cartridge utilizing a micro-adjustable key and a stationary key with an adjustment screw mounted independently on a boring bar, and a replaceable and interchangeable head having a recess for the adjustable key and a slot for the stationary key, the slots in both the boring bar and the head being open ended for easy machining.

Abstract: This invention relates to a holding assembly (10) for connecting a shaft (20) to a drive member (16), the holding assembly has a body (12), first and second end portions (14,18) and a middle portion (21), a member (52) is connected to the body (12) at the middle portion (21) for selectively controllably deflecting one of the first and second end portions (14,18) to preselected relative positions and eliminating runout in the shaft (20). The holding assembly (10) is particularly useful on a boring machine.

Abstract: A holder for a tangential chasing tool is supported in a tiltable manner in a thread cutter head which opens automatically. The holder has a chaser seat as well as a clamping plate including a guide claw. The clamping plate secures the dovetail portion of the chaser tool with the aid of a clamping jaw and two clamping screws. Exchangeable intermediate disks having different wedging angles, are insertable into the chaser seat. The bottom edge of said guide claw of the clamping plate has a convex shape, whereby the chaser tool is securely held in the holder without the need for a plurality of chaser holder sets and without any substantial modification of the holder structure.

Abstract: A holder for use with a screw cutting diehead of a machine tool, the holder having a recess for the reception of a thread chaser element, which recess has a surface arranged to locate the chaser element therein at a predetermined helix angle, and the holder being adapted to permit the element to be gripped in position therein. The invention also includes the combination of a chaser carrier and separate chaser holder mounted therein.

Abstract: An adjustable head arrangement for the shank of a boring bar is disclosed having an easily replaceable tool unit and also having an axially adjustable abutment means on the tool unit so that the cutting point of the tool unit is firmly supported and held during cutting operations but is adjustable with respect to the shank of the boring bar in between different cutting operations.

Abstract: A boring tool has a cutter mounted on a holder adjustable relative to the boring tool body. Adjustment of the cutter holder is effected by displaceable wedging surfaces in engagement with each other, one of such wedging surfaces being provided on the cutter holder and the other being provided on an adjustably displaceable wedge piece, the cutter holder body being substantially cylindrical but prevented from rotating by the wedge piece having a plane surface in engagement with a plane surface of the cutter holder.

Abstract: An adjustable tool holder for a boring bar has a first shank portion including a cutting tip keyed to a second shank portion to form a torsionally unitary cutting tool of constant exterior dimension receivable in a cylindrical bore in the boring bar. An adjusting screw is threadedly received in an axially extending bore in the first shank portion. The screw has an annular laterally enlarged head received and rotatable in an enlarged portion of the bore disposed in the second shank portion. An annular retaining bushing is press fit in a socket in the end of the second shank portion. The bushing retains the head of the adjusting screw within the enlarged portion of the axial bore, whereby rotation of the screw advances or retracts the first shank portion axially with respect to the second shank portion to a desired cutting position, the keying means between the mating shank portions preventing relative rotation therebetween.

Abstract: An expanding machine reamer whose cutter head has an imperforate core portion and three axially elongated rib portions radially projecting from the core portion in circumferentially spaced relationship. The rib portions are each formed with three bores approximately perpendicular to a common axial plane. A first bore receives a clamping screw engaging a clamping shoe which holds a cutting blade against a flank of the rib portion, second and third bores hold wedge-shaped abutment members radially engaging the blade and backing screws by means of which the radial position and the inclination of the cutting edge of the blade may be adjusted.

Abstract: The adjustable boring bar developed for metal working, and equipped with hard metal shifting tips consists of a boring bar shaft connected to the machine-tool, of a boring head adjustably guided as compared to the boring bar shaft and provided with shifting tip, as well as of elements fastening and adjusting the boring head. The boring bar shaft is provided with cylindrical bore including an angle with the symmetry line, as well as with radial slot, in the said bore a cylindrically developed boring head is located, on the cylindrical mantle of which flattening is to be found. Normal to the slot, setting and clamping element -- e.g. pinned adjusting screw -- is located. In the boring head, parallel to its centerline, an adjusting screw serving for the rough adjustment is to be found, whereas in the boring bar shaft a stop element -- e.g. a dowel pin -- of this adjusting screw can be found.

Abstract: Particularly compact facing head structure including a housing having an axis of rotation and adapted to be directly secured to a rotating spindle for rotation about the axis of rotation thereof, slides secured to an end face of the housing for movement transversely of the axis of rotation of the housing, an actuating member positioned within the housing for movement axially thereof having external helical cam teeth thereon, an axially fixed cam member positioned between the housing and actuating member for rotation relative thereto having internal helical cam teeth engaged with the helical cam teeth on the actuating member whereby an axial movement of the actuating member relative to the housing the cam member is rotated angularly with respect thereto, and slot and pin mechanisms operable between the slides and cam member for moving the slides transversely of the axis of rotation of the housing on rotation of the cam member, which facing head extends a minimum distance beyond the mounting face of the spindle

Abstract: A precision system for moving a tool with very small increments with respect to a frame including at least two micrometer drive mechanisms each comprising a screw spindle and a cooperating nut and each provided with an intermittently driven worm and worm wheel. The tool is borne solely by the micrometer drive mechanisms that are supported in the frame. In a preferred embodiment is of each micrometer drive mechanism the worm wheel mounted on a spindle, one of said worm wheel and spindle being connected to the screw spindle and the other to the nut.

Abstract: A diehead for use on a machine tool for cutting screw threads and having thread chaser carriers mounted on a body for pivotal movement about spaced parallel axes, means being provided for pivoting the carriers through a range of movement between operative and inoperative positions. The diehead includes locking means arranged so as normally to retain the carriers in position in the body and to permit removal of the carriers in an axial direction when they are pivoted beyond said range of movement.

Abstract: An improvement in a boring bar assembly is disclosed. The improvement relates to a lateral bar assembly in combination with the adjustable boring bar assembly of U.S. Pat. No. 2,838,316 issued to Albert Thomas, a co-inventor of the present invention. The improvement includes a lateral bar to which a major portion of the shank member of the boring bar assembly is removably fixed. The lateral bar has a plurality of longitudinally spaced threaded receptacles into which an end of the shank may be screwed. The shank may be selectively screwed into the lateral bar to thereby change the diameter of the boring bar assembly. The lateral bar may be varied in overall length with the number of receptacles likewise varied to thus vary the magnitude of the ranges of diameters of operation of the boring bar assembly.

Abstract: A mounting for supporting a cutter tooth in a boring bar for fine adjustment outwardly to compensate for tooth wear, the mounting including a cartridge insertable into a hole through the boring bar to support the tip of the cutter tooth in a cutting position with respect to the bar. The cartridge comprises a slidable holder connected by means of a differential screw to a nut so that, as the screw is turned, the length of the cartridge is increased to provide fine adjustment in the position of the cutter tooth. Coarse adjustment in the position of the cutter tooth is provided as an incident to assembling the parts of the cartridge by threading the screw into the nut until the lower end of the screw is flush with the lower end of the nut and by then mounting the holder on the upper end of the screw.