Abstract: A boring bar assembly for boring large diameter turbine bores in the field, the assembly utilizing a small hydraulic motor which drives a boring bar through an in line double reduction gear drive with a reduction ratio in excess of 100:1 and an output shaft which compensates for as much as 6.degree. angular misalignment between the boring bar and the output shaft of the gear box.

Abstract: A cutting device and method for the precision trimming of a selected portion of the peripheral edge of a cast lens secured on the external surface of a male mold independent of any eccentricity that may exist between the opening defined in the mold and the outer diameter of the mold.

Abstract: An automatic feed device for a facing head comprising a shank mounted to the main shaft of a machine tool, a body coaxial with the shank, a tool holder slidably fitted thereto, and an operating ring rotatably fitted between the shank and the body is disclosed. The automatic feed device comprises a worm shaft disposed at the body, clutches and worm wheels, a gear meshing with a stationary gear of the operating ring, a feed gear engageable with feed pins thereof, an internally threaded worm wheel meshing with the worm wheel, a feed screw engageable with the internally threaded worm wheel, a shifter connected to the clutches, a shifter driving shaft engageable therewith, a shift lever constituting a cam, a forked connecting member connected to the shifter driving shaft, a press lever adapted to press a cam roller against the cam, and a feed direction detecting lever connected to the shift lever.

Abstract: A linearly and angularly adjustable holder for a cutting tool having primary and secondary cutting edges includes a basic element, a receptacle element for the cutting tool rotatably mounted on the basic element, and a setting element slidably mounted on the basic element.The receptacle element is mounted on the basic element so as to be pivotal about the point of intersection of the primary and secondary cutting edges of the cutting bit. An adjustment screw 50 whose threaded portion is seated in the basic element and whose head engages a recess in the receptacle element serves to perform the angular adjustment. The linear adjustment is accomplished with the aid of a double threaded adjustment screw which connects a wedge and the basic element and which slidably engages the setting member to control the length of the holder.

Abstract: This invention relates to metal cutting and more particularly to method for manufacturing constant velocity universal joints. A construction is disclosed wherein spherical turning, milling and grinding of the races and grooves of the joint members of a universal joint are performed on common machines without removing the workpieces and the workpieces are held in common workheads. During the machining operations, relative movements between the tools and workpieces are referenced to common axes thereby duplicating the relative positions and movements between the workpieces during actual service. The inventive concept provides a means for achieving consistent product quality and is adaptable to the automated manufacturing of constant velocity universal joints.

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 lathe for machining a balloon-shaped pocket in a turbine rotor comprising a carriage disposed on ways to move axially along the bed of the lathe, a cross-feed mounted on the carriage, the cross-feed moving toward and away from the axis of the lathe and a tear-dropped shaped tool holder for holding a single-edged cutting tool disposed on the cross-feed in such a manner that the cutting tip of the single-edge tool moves in a circular arc and cooperates with the cross-feed to cut a balloon-shaped pocket in a turbine rotor.

Abstract: A machine tool of the type wherein a non-rotating cutting tool cuts a workpiece which rotates about a longitudinal axis of rotation. The machine tool includes a block member having the cutting tool attached thereto, the block member being coupled to a housing for radial movement of the block member and cutting tool in response to axial movement of a roller screw spindle internal of the housing.

Abstract: A precision internal tube cutter can sever an upper end portion of a guide thimble inserted and attached within a passageway of a top nozzle adapter plate of an irradiated fuel assembly so as to facilitate reconstitution of the fuel assembly. Further, the upper end portion of the thimble can be cut without producing any burrs, roughness or distortion at the cut end. The cutter includes a body with upper and lower end portions of greater diameter sizes than that of an intermediate portion which interconnects them. A stem extends into an axial bore formed longitudinally through the body. A radial slot is defined within the intermediate body portion. In one embodiment, a pair of slides each with a cutting wheel rotatably mounted thereto are mounted within the slot. A lower conical end of the stem engages the slides and axial movement of the stem will cause radial movement of the slides.

Abstract: An interchangeable machine tool holder unit for use in a machining apparatus for the support of a machining element, for example, a cutting bit, which includes an elongated rotary body adapted to be driven in one direction about the longitudinal axis thereof, a tool holder supported in end-to-end fashion by the rotary body for movement in a direction radially of the rotary body, an axially displaceable member axially displaceably carried inside the rotary body, and an indexing mechanism for causing the axially displaceable member to move in the axial direction each time the rotary body undergoes one complete rotation to permit the tool holder to move in the radial direction.

Abstract: A boring head of a multiple-operation machine tool comprises a housing which is kinematically coupled to a spindle and adapted to accommodate a carriage spring-biased against the housing, 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 latter and kinematically coupled to a drive which moves it in the axial direction. The boring head also incorporates a counterbalance comprising at least a pair of pins received in through holes provided in the carriage. The holes are symmetrical with respect to the axis of rotation of the boring head and extend at a perpendicular to said axis of rotation. The pins are kinematically coupled to the rod so that they can reciprocate in the through holes of the carriage.

Abstract: A tool for a nc machine is provided with a radially displaceable surface slide serving as a tool holder. The tool head is interchangeable by a tool head changing device mounted on the nc machine. The tool head is automatically releasably mounted on the work spindle by means of a clamping cone and a tie rod concentrically disposed within the work spindle and engaging the conical surface of the clamping cone. There is provided a pair of control rods for radially displacing the surface slide and for limiting the radial movement of the surface slide, which control rods are adapted to be automatically separated by releasable clutches for interchanging the tool head (FIG. 1).

Abstract: What is proposed is a drilling attachment for use with a machine tool that rotates a workpiece in which the drilling apparatus is moved into an operative position to the workpiece by means of the machine tool slide and is rotated with the workpiece so that a drilling member associated with the rotating drilling apparatus is caused to rotate and to enter the workpiece while the same is rotating.

Abstract: A device for removing pipe attached to a fitting includes cutting apparatus for removing the pipe disposed within the fitting. A wrench apparatus is connected to the cutting apparatus for gripping the fitting to prevent its movement when the cutting apparatus is activated. Alternatively, this device may be used as a reaming device which permits radial movement of the cutting blades into engagement with a pipe after the cutting blades have been inserted within the pipe.

Abstract: A cat-head type machine tool is controlled by an electronic control system (28, 31) so as to allow relative movement between the rotating tools (11, 12) and the stationary workpiece (22) within a revolution of the tools, such that non-uniform and/or barrelled or oval profiles may be machined on a cyclindrical workpiece. This is particularly useful for the high speed production of pistons for internal combustion engines where such profiles can give a piston improved performance.

Abstract: Metal working cutting tool with a cutting insert which can be inserted in a recess of a tool shaft and fastened therein by means of a clamping jaw, whereby the cutting insert has the approximate shape of a prism with two diagonal opposite cutting edges and along one of the two lengthwise edges are adjacent cutting faces, which form an acute angle with the respective opposite principal cutting pressure and support surface, so that the angle opens towards the pressure-feed and support surface, whereby in the area of the joint lengthwise edge of the cutting face, there is incorporated in the cutting insert a continuous longitudinal groove of which one of the side walls serves as a support area for the relief-cut pressure-feed and support surface of the recess of the tool shaft, and whereas the respective other side wall forms the support surface for a recessed clamping jaw which is located in a diagonal groove of the tool shaft.

Abstract: A face turning head for machining stations, comprises a drive mechanism for displacing the tool slide transversely. A drive shaft drives a worm gear or its equivalent through a transmission element, such as a cog belt transmission to axially displace a setting rod. This axial movement of the setting rod, which is independent of the rotation of the turning head but can be effected simultaneously therewith, actuates a gib key drive by which a tool slide is displaced transversely to the turning head axis. Through reversing rollers and displaceable blocks, the centrifugal disequilibrium caused by the tool slide movement is compensated for.

Abstract: A dual spindle assembly is provided which has a hollow outer member having an inner member rotatably and eccentrically mounted therein. The inner spindle member has a mounting hole defined eccentrically in one end for engaging a cutting tool. In order to make possible a continuous change in the radius of revolution of the cutting tool about the axis of the outer spindle member, a plurality of worms extend parallel to the spindle assembly and are geared to one another for joint rotation. Ball nuts on the worms travel back and forth along the same with the bidirectional rotation thereof. Rigidly interconnecting the ball nuts, a connector surrounds the spindle assembly via a ring rotatably mounted therein. The ring has an inward projection making threaded engagement with the inner spindle member through a slot cut longitudinally in the outer spindle member. The linear travel of the ring with the ball nuts results in the rotation of the inner spindle member relative to the outer.

Abstract: A machine tool (10) with a rotating cutting tool (24) has a spindle assembly (20,48) mounted for rotation in a longitudinally movable headstock (18). The spindle assembly includes a spindle (48), driven by a motor (50) and an integral machining head (20) having a rotatably mounted drive screw (62). The drive screw carries a radially positionable follower (72) to which is connected a tool block (22) to define a radial slide for supporting the cutting tool. A drive shaft (82) extending through the spindle is in driving engagement with the drive screw such that rotation of the drive shaft relative to the spindle produces rotation of the drive screw and consequential radial movement of the follower and tool block. A motor (76) mounted on the spindle for rotation with the spindle is connected to the drive shaft for rotating it either a clockwise or counterclockwise sense to produce radial movement of the follower and tool block.

Abstract: Automatic backfeed deburring system for holes drilled through non-planar hole end surfaces wherein axially resilient float in the deburring tools accommodate axial variations in the hole burr edges.

Abstract: A method and apparatus for producing an aspherical surface, for example, an aspherical optical surface, on a workpiece, on which the workpiece is rotated about a first axis, a cutting tool is rotated about a second axis, and at a radial distance from the second axis, and the second and first axes meet at a point and at an angle with respect to one another, the second axis being moved with respect to the first axis so that the point moves along the first axis and the angle changes.

Abstract: A metal cutting tool holder and adjusting mechanism having a rotational drive; a housing and cam mounted therein for rotation by the rotational drive; a cam follower mounted on the cam for axial motion; a wedge block axially slidably contained in the housing and adapted to be moved axially by the cam follower; the wedge block having a tapered transverse surface; and a tool holder block transversely slidably contained in the housing and adjacent the wedge block; the tool holder block having a tapered surface thereon slidably engaging the tapered surface of the wedge block but which is a reverse taper compared to the taper of the wedge block, so that the rotation of the motor drives the wedge block axially, and the tapered surfaces cause the tool holder block to move in a radial direction of the wedge block. In alternative embodiments, unidirectional controls cause the rotational drive to move the wedge block in the opposite direction. The controls include a comparative voltage electrical control system.

Abstract: A precision internal tube cutter can sever an upper end portion of a guide thimble inserted and attached within a passageway of a top nozzle adapter plate of an irradiated fuel assembly so as to facilitate reconstitution of the fuel assembly. Further, the upper end portion of the thimble can be cut without producing any burrs, roughness or distortion at the cut end. The cutter includes a body with upper and lower end portions of greater diameter sizes than that of an intermediate portion which interconnects them. A stem extends into an axial bore formed longitudinally through the body. A radial slot is defined within the intermediate body portion. In one embodiment, a pair of slides each with a cutting wheel rotatably mounted thereto are mounted within the slot. A lower conical end of the stem engages the slides and axial movement of the stem will cause radial movement of the slides.

Abstract: A duplicator attachment for a woodturning lathe which provides the same freedom and control of the cutting action as in normal, freehand, turning operations, and enables duplication of inside contours, and even bowls. The duplicator also enables the pattern to be supported on the same vertical center as the workpiece and above the workpiece, rather than below or to the side of the workpiece, thereby permitting the full swing of the lathe to be used. The duplicator attachment provides a carriage to bring the cutting tool and a tracer, respectively, against the workpiece and pattern. The carriage has three sections which provide for movement of the cutting tool and tracer longitudinally along the center line of the lathe, laterally perpendicular to the center line of the lathe, and rotationally about an axis mutually perpendicular to the directions of the lateral and longitudinal movements.

Abstract: A cutting device and method for the precision trimming of a symmetrical portion of the peripheral edge of a centrifugally cast lens secured within a cavity of a female mold without the need for extensive and complex prior alignment of the cutting tool with the lens.

Abstract: A pipe cutter having guidance means for cutting a pipe on a plane generally perpendicular to the longitudinal axis of the pipe. A power tool imparts a rotational torque to a shaft having a circular cutting blade carried thereon at substantially right angles thereto. The guidance means, having a pipe contacting surface, is journalled onto the end of the shaft, so that rotation of the shaft and blade will not cause rotation of the guidance means. The method involves aligning the rotating blade at a preselected cutting point, imbedding the blade into the walls of the pipe until an arcuate portion of said walls is cut, and thereafter imparting an orbital motion to the shaft about the pipe axis to achieve the pipe cutting operation.

Abstract: The apparatus comprises a motor stator which is stationary relative to the rotating spindle, while the rotor of the motor rotates in synchronism with, for example, the nut of a screw mechanism which as a whole forms part of the spindle. A variable dependent on the angular position of the nut is controlled by corresponding operation of the motor and can be maintained irrespective of the speed of rotation of the spindle. The apparatus is particularly intended and suitable for the work spindles of machine tools.

Abstract: The apparatus permits the relative rotation of a component on a rotating spindle by means of a superimposition drive having two inputs and one output. At one input the spindle rotation is fed in, while at the other a desired rotation of the component, which in turn is connected to the output of the drive, is fed in. The rotational position and/or rotating force can be measured and controlled. Applied to adjusting movements on machine tool spindles, for example for powered chucks or radially adjustable rotating tools.

Abstract: A powered chuck in which a torque is transmitted to an input member and by the latter is converted with the aid of a rolling screw mechanism into an axial clamping movement, a preferably controllable return locking means being provided for the rolling screw mechanism.

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: A boring tool is disclosed capable of positioning a tool element between a radial cutting position and a radial retracted position out of contact with the finished workpiece bore to avoid tool mark formation on the finished bore during tool withdrawal. The boring tool is simple and low cost in construction and includes a resilient tool-carrying member which extends transversely of the spindle axis in cantilever fashion for deflection by a spindle draw bar relative to a stop means on a fixed support member attachable to the spindle. During boring, the tool-carrying member is in deflecting engagement with the drawbar and, in conjunction with stop means, positions the tool thereon in a radial cutting position. For tool withdrawal, deflecting engagement is released so that the resiliency of the tool-carrying member positions the tool in a radial retracted position out of contact with the finished workpiece bore.

Abstract: A portable tube end cutting tool includes a tool support shaft with an alignment assembly at one end for insertion into the tube whose end surface is to be machined and a cutter head assembly mounted for rotation about the support shaft. The tool portion to be inserted into the tube space adjacent the tube end to be machined is compact and is adapted to be locked in accurate alignment by incremental rotation of the support shaft over small angular increments, and is particularly useful where the tube surfaces to be machined are located in confined or relatively inaccessible working places.

Abstract: A working tool having a linear working edge is secured to a tool holding arm which is rotatably arranged about a focus shaft extending in parallel with a Z axis and is slidable linearly in parallel with an XY plane. A workpiece is secured to a workpiece mounting member in such a manner that its center axis extends in an X' direction which is inclined by an angle (.pi./2-.theta.) with respect to an X axis. A longitudinal direction of the working edge is inclined by the angle .theta. with respect to a line which is obtained by projecting a sliding direction of the tool holding arm. When the working tool and the workpiece are moved relative to each other, the workpiece is cut into a quadric surface in accordance with a quadric surface formed by the working edge as an envelope of tangents.

Abstract: A thrust bearing has a curved surface machined therein by a cutter which is positioned by a cam as the bearing is rotated. The cam causes the cutter to pivot so that a sloped cut is made rather than a conventional planar cut.

Abstract: A boring and facing head for use in a machine tool comprising a body for insertion into a spindle on the machine tool, a tool, a slide mechanism for supporting the tool for movement transversely of the body, a series of shafts and gears for actuating the slide, and a coupling tongue located at the end of one of these shafts and slidably engageable with a rotary device supported by the machine tool whose rotary movement is precision-controlled by a numerical control unit.

Abstract: A device for removing pipe attached to a fitting includes cutting apparatus for removing the pipe disposed within the fitting. A wrench apparatus is connected to the cutting apparatus for gripping the fitting to prevent its movement when the cutting apparatus is activated. Alternatively, this device may be used as a reaming device which permits radial movement of the cutting blades into engagement with a pipe after the cutting blades have been inserted within the pipe.

Abstract: Apparatus for inplace refinishing of the annular seating surfaces in top ded ball valves which comprises a locating ring adapted to be mounted on the top surface of the valve housing. An alignment gage is provided for precisely positioning the locating ring. A cutting apparatus is mounted on the precisely positioned locating ring. The cutting apparatus includes a carriage plate for mounting on the locating ring, channel-forming means mounted on the carriage plate and a cutting tool having a housing adapted to side in the channels and having a cutting head oriented to cut the seating surface at the desired angle.

Abstract: A device for controlling the thickness of a contact lens produced on an automatic and computerized numerically controlled (CNC) lathe is disclosed. A sensor control device is incorporated on a lens lathing machine for engaging the front surface of a lens button upon which the convex surface of the contact lens is to be machine lathed. Immediately upon contact between the sensor and the front surface, the sensor provides for breaking an electrical circuit in the lathe controller providing for automatic position registration of the lens button front surface relative to the cutting tool and its pivot point, and a lens of desired center thickness and power curve radius is subsequently generated. Close tolerances and high repeatability are domonstrated in contact lenses lathed generated by these principles.

Abstract: A metallic ring rotating about a horizontal axis is parted by a cutting edge of a parting tool presented to the surface of the workpiece below its center of rotation. The parting tool is subjected to substantially constant high pressures which minimize chatter, vibration and shock. Vibrations generated during heavy duty operations are minimized by the additional step of supporting the toolholder with side plates.

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 drilling tool adapted to produce a radial enlargement along a cylindrical elementary drilled hole in concrete masonry. The tool comprises at least one cutter which is mounted in a slot in a drill sleeve which enters the elementary drilled hole, this cutter being held so as to be fixed in the peripheral direction and axially but movable radially by an inner spreader element, provided with chamfered surfaces, which is movable axially relatively to the drill sleeve. This spreader element is in one piece with the shank, which is directly rotatively driven, is movable axially relatively to the drill sleeve and is close-fitted therewith in the peripheral direction. The end of the drill sleeve projecting out of the elementary drilled hole is connected to an abutment piece which determines the location of the radial enlargement along the drilled hole.

Abstract: A tool feeding head is provided, which is adapted for rapid attachment to and detachment from a machine spindlehead. The head includes a shaft which is joinable to a machine spindle of the spindlehead for coupling rotary driving motion from the spindle to either a cross-feed or feed-out cutting tool, the shaft being provided with a bore. An actuating rod is mounted in the bore for engaging the tool, the actuating rod feeding the tool when the actuating rod is reciprocated within the bore by a rod reciprocating mechanism. A system or device for controllably driving the rod reciprocating mechanism is immovably fixed to the machine spindlehead, the driving system operating the rod reciprocating mechanism to cause the actuating rod to feed the selected tool at a prespecified rate. Structure supporting the shaft and the reciprocating mechanism enables an automatic tool changer to selectively join the shaft to the spindle, and place the rod reciprocating mechanism in operative relationship with the driving system.

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: A cutting tool is operatively connected with the piston of a tool positioning cylinder so as to move in response to axial movement of the piston. One end of the cylinder is connected with one end of a stroke limiting cylinder to form a closed fluid circuit therebetween. The piston of the stroke limiting cylinder has a predetermined adjustable stroke. A metering system is provided for injecting or extracting incremental fixed volumes of oil to and from the closed fluid circuit to increase or decrease the stroke of the piston in the tool positioning cylinder and thereby vary the depth of cut of the tool.

Abstract: A machining center for machining the interior of an elongate tubular workpiece includes a bed on which a rotatably indexable member is slidably mounted for movement on the bed along a first axis. Removably fastened on the indexable member in spaced parallelism are a first and second hollow bore spindles each engaging the exterior surface of a tubular workpiece whose interior is to be machined. The first spindle is rotatably driven to rotate the tubular workpiece about its axis responsive to machine tool control system commands slidably mounted on the bed for movement thereon along a path perpendicular to the path of member movement in an upright. Extending from the upright parallel to the axis of upright movement for insertion into the workpiece bore is an arm which is movable along the upright along a vertical direction. At the distal end of the arm is a right angle, high speed rotary driven cutting tool carrying spindle.

Abstract: The turning head comprises a support member (1) which is to be secured to the spindle of a machine tool. The support member (1) has a radially adjustable slider (4) which carries a tool (5). An adjusting rod (7) is displaceable coaxially with respect to the support member (1) and acts on at least one helically toothed rack (8) which is axially movable in the support member (1). Arranged on the slider (4) is a toothed bar (10) which extends in the direction of movement thereof and whose inclined teeth (10a) mesh with those of the rack (8) and are inclined at the same angle (.beta.) as the teeth of the rack (8), with respect to the axis of rotation of the support member (1).

Abstract: An optical lens having a hyperboloid surface is formed by cutting or grinding a workpiece made of glass or plastics while rotating it about its axis, while a cutting or grinding tool having a linear working edge is rotated or swung about a central axis, the working edge is separated from the center axis by a given distance and is inclined with respect to the central axis by a given angle. The envelope of the working edge forms a hyperboloid of one sheet of revolution along which the workpiece is cut or ground. An eccentricity of the hyperboloid curve can be adjusted by changing the inclined angle of the working edge with respect to the central axis.

Abstract: The present disclosure relates to an oscillating cutting toolhead having an oscillating cutter comprising two blades which are prestressed radially inwardly, the blades bearing against opposite points of a spacer disposed therebetween, the device being characterized in that the spacer has a cross section of generally circular form with two opposed parallel, axially extending flattened portions, the spacer being axially non-displaceable yet rotatable about the longitudinal axis of the tool and arranged for limited oscillation relative to the cutter in the angular position in which the two flattened portions are parallel to the oscillating direction of the cutter, the spacer being operatively connected with a rotary dog guided in the toolhead for axial and rotatable displacement. The dog may be axially displaced and locked in a retracted position away from the spacer by insertion of a tool through an axial opening in the toolhead to facilitate cutter blade replacement.

Abstract: An adjustable fly cutter tool for cutting and forming blanks of metal, wood, plastic, glass, etc. The tool can be used on a conventional lathe or milling machine, and enables the operator to continuously change the depth of the cut into the blank without slowing or stopping the tool operation. The cutting tool is mounted on a threaded bar movable in the x and/or y direction and is axially received in a threaded advancement gear which is actuated by a ratchet assembly that extends or retracts the position of the threaded bar holding the cutter as the main gear is rotated. A non-rotating lever journalled around the cutter drive shaft activates the assembly.

Abstract: The present invention relates generally to numerically controlled contour machining, and particularly to an apparatus and method for performing such operations on a "bar-type" horizontal boring mill using the spindle bar to vary the cutting radius of the rotating cutting tool and the machine table to feed the workpiece toward the cutting tool.