Abstract: A machining method for machining a superficial portion of a laminate using machine tool having a depth limiter which restricts a maximum depth of the machine tool. A guide frame having an inner guide contour restricts a maximum dimension of the superficial portion, and is secured over the superficial portion. The superficial portion is machined while the machine tool is guided by the guide contour. From another point of view, a machining apparatus for machining a superficial portion of a material is provided. The machining apparatus comprises a guide frame, an inner guide contour for guiding a machine tool, an attachment member for securing the guide frame to an attachment member, adjacent to the superficial portion, of the material.

Abstract: An improved dual blade boring tool having a solid surround housing portion in which a pair of parallel spaced transverse channel openings extend perpendicular to the longitudinal axis of the rotatable tool, a pair of dual cutter insert members are mounted in the channel openings, respectively, and are moved in opposite directions to each other responsive to rack and pinion movements of a rotatable cylindrical shaped cam member having at least a rack portion and being meshed to engage pinion portions provided on each of the dual insert members, whereby the rotation of the rack portion of the cam member converts to reciprocating movement of each of the meshed insert members to move oppositely disposed insert members in opposite and corresponding linear directions with respect to the surround housing of the boring tool.

Abstract: A radial-feed rotating drill tool having a tool holding fixture formed at an eccentric portion of a feed spindle eccentrically mounted in an external spindle. By rotating the feed spindle relative to the external spindle, a feed movement may be initiated with minimum expense. Further, because of the surface-contact mounting of the eccentric shaft portion of the feed spindle in the external spindle, mounting of the tool-holder without play is ensured.

Abstract: There is disclosed a machine tool for machining bores having a large axial length and a boring tool especially suited for a machine tool of this kind in which a boring bar holding at least one tool lip is supported by a steady adapted to be connected to the boring bar 28 via a coupling 48. By the steady the radial excursion of the boring bar during the machining process is reduced to a minimum.

Abstract: There is disclosed a feed system for a rotating cutting tool which is driven by a spindle and is adjustable in the feeding direction via an adjusting means. The adjusting means is driven by an operating shaft which can be driven synchronously with the spindle or at a predetermined difference in speed with respect to the spindle by a separate feed motor. In the case of a synchronous drive of the operating shaft and the spindle no feed is effected, whereas the cutting tool is adjusted, when a speed difference is adjusted by the adjusting means. After adjusting the desired position of the cutting tool, the operating shaft and the spindle are again driven at the same speed.

Abstract: A countersinking and deburring tool for deburring, chamfering, and countersinking of partially and fully penetrating holes with a rotationally actuated housing and at least one blade which can move within a housing shaft and perpendicular to the rotational axis of the housing, provides that, depending on the direction of rotation of the drive, the blade is withdrawn into the housing shaft or extended out of the housing shaft (reverser operation), and the displacement drive for the blade consists of a rocker which is mounted so that it can rotate in the housing and is rotationally actuated, which acts on the blade with at least one actuation pin. According to the invention the rocker's rotary actuator consists of at least one centrifugal weight arranged in the housing so that it can move diametrically, whose diametric displacement in the housing is converted into a rotational motion on the rocker through a form-fit guide.

Abstract: A tool, in particular a fine-turning boring bar, for use in machine-tools, includes a shank part (16) which can be coupled to a rotating tool spindle, a head part (10) which is secured to the shank part (16) so as to remain fixed during rotation and which can be adjusted transversely with respect to the shank part (16), and a cutting support (20) which can be radially adjusted for coarse positioning purposes. Cylindrical fitting pins (28, 30) provided with radial face grooves (36, 38) are formed facing each other on the shank part (16) and the head part (10). A cross-coupling element (12) arranged between the front ends of the fitting pins (28, 30) has radially mobile pairs of claws (40, 42) which extend axially from both sides and which engage in mutually perpendicular face grooves (36, 38) in the fitting pins (28, 30). The two fitting pins (28, 30) also engage in mutually eccentric fitting holes (32, 34) of an eccentric sleeve (18) which can rotate with respect to the head part (10) and the shank part (16).

Abstract: Described is a deburring tool with a knife housing extended downward and with a smaller diameter making it possible to debur even smaller bores on the front and rear.

Abstract: A surgical tool is disclosed for use in spinal stabilization for fusing contiguous vertebra in an animal spine. The tool includes a distal end having external dimensions sized for the distal end to be inserted within the animal body and located against a tissue layer between contiguous vertebra. Cutting blades are carried on the distal end for cutting at least a portion of the layer and at least a portion of vertebra bodies to form a chamber within the contiguous vertebra. The cutting blades are selected for the chamber to be sized greater than the external dimensions of the distal end. A control element is provided for controlling a depth of cut of the cutting blade between at least first and second positions with the cutting blade retained within the external dimensions when in the first position and with the cutting blade extended to form the chamber when in the second position.

Abstract: A counterbore for the bilateral mounting of plane surfaces on through holes that consists of a tool head that may be driven rotationally by means of a shank. The counterbore has two cutting heads with cutting edges pointing in opposite directions. The cutting heads are guided within the tool head in take-up slots in such a way that they may be moved out radially and fixed in a preselected position. The cutting heads lie against one another within the area of the take-up slots. In order that high cutting forces may be transmitted easily in a tool head of small dimensions, the cutting heads are guided through a guide slot extending in a radial direction and positioned in the take-up slots of the tool head.

Abstract: Deburring apparatus for removing the burrs which are formed at the intersecting inner edges of at least two intersecting bores of a workpiece comprises; a frame having means for holding the workpiece; a cutter spindle borne rotatably in the frame; a cutter hinged to the leading end portion of the cutter spindle and biased to swing outwardly of the side thereof for cutting off the burrs at the inner edges of the bores of the workpiece held by the holding means of the frame when the cutter spindle is inserted into one of the bores and rotated; and a guide sleeve fitted slidably on the cutter spindle for sheathing the cutter, when the cutter spindle is inserted into or retracted out of the one of the bores, to protect the inner walls of the workpiece from damage, and for exposing the edge of the cutter to the outside when in the deburring operation. The cutter is directed along a curve of the inner edges of the bore of the workpiece by a cam on the frame engaged by a follower on the cutter spindle.

Abstract: The invention relates to rotary cutting tools (10) provided with cutting means and mounted in a tool holder (11). A sleeve (17) provided with an eccentric bore is rotatably positioned between the tool holder (11) and the cutting tool (10) for radial adjustment of the cutting means. For purposes of making possible use of cutting tools having center cutting means the sleeve (17) is rotatable relative to the tool holder (11) about an axis (18) which is radially spaced from the rotational axis (21) of the cutting tool (10).

Abstract: A boring bar is disclosed having an elongated body adapted to be rotatably driven around a predetermined axis. A longitudinally extending bore is open to at least one end of the body and has an axis which intersects the body axis at an acute angle. A cutting tool has an elongated shank with a cutting edge at one end while the other end of the shank is slidably received within the bore so that the radial displacement of the cutting edge with respect to the cutting axis is directly proportional to the longitudinal position of the shank within the body bore. A nut threadably secured to the body engages a radially extending pin secured to the shank in order to adjust the longitudinal position of the shank within the bore.

Abstract: An annular thread cutting die head for a power driven threading machine is comprised of an annular support plate supporting a plurality of radially displacable thread cutting dies spaced apart about the axis of the die head, and an annular cam plate assembly coaxial with and pivotal relative to the support plate to radially displace the cutting dies. The cam plate assembly is spring biased to pivot relative to the support plate in the direction to radially retract the cutting dies, and is selectively operable relative to the support plate to achieve the cutting of a straight thread or to achieve the cutting of a tapered thread. In connection with the cutting of a tapered thread, receding replacement of the cutting tools is controlled by a unique cam arrangement on the machine carriage engaged by the cam plate assembly under the spring bias and independent of torque imposed on the die head during the threading operation.

Abstract: A magnetic base drilling machine includes a base having a magnet coil therein and a motor assembly mounted on the base for driving a rotary cutting tool. Electrical circuitry, including switches for applying power to the magnet coil, for reversing the direction of current to the magnet coil, and for controlling the current to the motor are provided for controlling the magnet coil and motor. A user-manipulatable control handle includes a multi-function control cam having cam surfaces that selectively control the switch that applies power to the magnet coil and which physically blocks operation of the motor switch until the magnet coil is energized. Conversely, the magnet coil cannot be de-energized until the motor switch is moved to its off position. If desired, the direction of the electrical current applied to the magnet coil can be reversed to assist in removing the base from a magnetized work surface.

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: 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: The present invention relates to a boring device for boring internal surfaces of hollow workpieces of the kind which comprises radially adjustable insert-provided holders, there being provided pressure means, such as steering pins so as to effect radial adjustment of the insert holder from an outer active working position to an inactive position. The radial adjustment occurs by having each insert holder via said steering pins supported against a bushing of non-circular cross section actuatable by a shaft member centered within the bushing, said bushing upon its rotation effecting said radial adjustment.

Abstract: In the machine tool art, a dual cutter boring head which comprises a cylindrical body having side-by-side, tool-holding slides mounted diametrally thereon; the slides at their outer ends being fitted with cutters disposed exteriorly of the periphery of the body, and micro-adjustment mechanism within the confines of the body arranged to impart simultaneous, opposed, reversible motion to the slides whereby to precisely and equally adjust the slides and the cutters thereon outwardly or inwardly, selectively.

Abstract: Apparatus comprising a die head, a carriage provided with the die head and a pair of support rods mounted on a frame in parallel thereto and supporting the carriage movably in opposing relation to the pipe to be threaded. An elongated cavity parallel to the frame is formed in the carriage at a position immediately below the front end of an arm for advancing and retracting chasers on the die head. The support rod on the frame is disposed in the cavity, and a profile member fitted in the elongated cavity is movably supported by the support rod. The front end of the arm on the die head is placed on the top profile surface of the profile member, so that the threading torque of the die head causes the arm to fixedly press the profile member against the suppot rod and, at the same time, the lead of the chasers advances the carriage, while permitting the arm to move on the top surface of the profile member. Thus the open end of the pipe is formed with a tapered threaded portion having a predetermined length.

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.