Abstract: A drill including a cutter member and a shank which are formed separately from each other and fixed to each other for rotation as a unit, wherein the shank has an engaging groove formed in a distal end face thereof such that the engaging groove extends in an axial direction of the shank and is aligned with a center of the distal end face, and the cutter member consists of a rectangular plate including a proximal end portion fixed to the shank by engagement thereof with the engaging groove, and a distal end portion which is remote from the shank and which has at least one cutting edge.

Abstract: An adjustable reamer includes a securing portion, a shank, a guide members, at least one cutting insert, an adjustment device for adjusting the insert, and a clamp for clamping the insert. The clamp is releasable from the shank. A first place of contact is created between the clamp and the shank, and a second place of contact is created between the clamp and the cutting insert. An angle between the first and second places of contact in relation to the rotational axis of the reamer is at least 100.degree., preferably larger than 135.degree..

Abstract: A chip removal tool for finishing the radial surface of a bore and having a cylindrical bit for mounting a cutting element and a deflector positioned adjacent the cutting element to deflect chips cut from the bore and urging the chips into a flow of fluid from respective cooling and lubricating sources.

Abstract: A surgical instrument has a housing which contains a motor that drives a spindle. A tool bit is attached to the motor by a holder that includes a body with a first end portion connected to the spindle, a central portion with a cavity therein, and a second end portion having an aperture through which a shaft of the tool bit passes into the cavity. A pair of lock pawls are pivotally mounted in the cavity with each one having a first tab that enters a slot in the shaft when the lock pawls are in a first position to hold the tool bit in the instrument. The first tabs retract from the slot when the lock pawls are in a second position for changing the tool bit. The lock pawls have second tabs that engage a restrainer only in the second position to prevent the body from rotating. A ring extends around the body and pivots the lock pawls between the first and second positions when the ring moved longitudinally along the body.

Abstract: For the purpose of rigid connection of the cutter holder (9) to the tool carrier (5), the tool carrier (5) has a driving key (11) on its end side, which driving key is inserted into a corresponding transverse groove (13). The driving key (11) has a specified excess size compared to the transverse groove (13), such that when a setscrew (10) is tightened the tool carrier (5) and the cutter holder (9) are elastically deformed. Laterally next to the transverse groove (13) the surface of the cutter holder (9) is supported on the tool carrier (5).

Abstract: A self-calibrating countersink tool includes a reusable insert-holder with an axis-defining shank portion and an insert-receiving notch disposed at one end of the holder. The tool also includes at least one selectively attachable insert which is sized and shaped to be received within the insert-receiving notch of the holder. Each disposable insert includes a tapered cutting-edge portion and a notch-mating portion which is complementary in shape to the insert-receiving notch. When the insert is in mating engagement with the holder, the cutting-edge of the insert is disposed forwardly of the holder and defines an angle of between about 105 and 165 degrees relative to the holder axis. The countersink tool also includes an affixation means for affixing a disposable insert to the holder such that the insert is in mating engagement with the insert-receiving notch.

Abstract: Rotating shaft tool with a shaft, in which at least one main channel for coolant/lubricant is provided, extending in the longitudinal direction, with a cutter head connected to the shaft and having chip grooves and a groove discharge region, with a sleeve which extends between the groove discharge region and the shaft and which covers at least one feed channel formed between the main channel and the groove discharge, characterized in that the at least one feed channel is provided substantially parallel to the longitudinal mid axis of the shaft and of the cutter head, and has a transition, free from sharp bends, from the main channel to the feed channel and from the feed channel to the groove discharge region.

Abstract: A reamer for precision machining of holes includes a reamer body and a knife plate supported above the exterior of the body and extending along the exterior. The knife plate has a front lower radial height cutting region and a rear taller radial height cutting region joined by an inclined step so that the first front region does the major cutting and the second rearward region does the finer machining. The front cutting region has an entrance bevel. The inclined flank shapes of the cutting regions are disclosed. Reamer guide strips supported along the support have a similarly shaped bevel and step as the knife plate.

Abstract: An improvement to the art of interchangeable spinning machine tool holders has a horizontal disengagement mechanism. A dove tail assembly is used on a spinning receiver and a drilling tool holder combination. In operation a drill press can remain in position above a workpiece. Then the dove tail can be loosened and the drilling tool holder exchanged with another. When the dove tail is tightened the new drilling tool holder is in the proper machining position.

Abstract: The invention relates to a drill with a drilling shank, particularly with a screw shank comprising a self-tapping thread, and with a fork-shaped hard-material plate-shaped drilling tip disposed opposite the driving end of the shank, said drilling tip being inserted into a holder in the shank, said holder comprising two grooves, disposed diametrically with respect to each other in the shank, for accommodating prongs of the drilling tip. The shank terminates bluntly in an essentially radial end surface from which the grooves extend towards the driving end in such a manner that exclusively the prongs of the drilling tip, pressed axially into the grooves, both hold the drilling tip self-lockingly on the shank and also transmit the torque from the shank to the drilling tip.

Abstract: A tool bit for use in at least one of a drilling and cutting operation is formed of an axially extending carrier member (1) and a cutting member (2). The cutting member (2) has an expansion joint (2a) extending parallel to the axis of the carrier member (1). The expansion joint (2a) is formed by reducing the thickness of the cutting member (2) so that material webs (2b) remain. In the fabrication and formation of the tool bit, the cutting member (2) is a single unit. In the use of the tool bit, due to the expansion joint the cutting member forms individual operating units (2a) affording reduced material expense of the cutting member (2), because of reduced stresses.

Abstract: A desk includes a worksurface supported by supports defining a knee space under the worksurface and an access opening to the knee space under an edge of the worksurface. A courtesy panel is removably mounted to the furniture structure for movement between a closed position for covering the knee space for privacy and an open position to facilitate access to the knee space by repairment. A first bracket is attached under the worksurface above the courtesy panel, and a second bracket is slidably attached to a top of the courtesy panel for engaging the first bracket. The two brackets include mating apertures, and a thumb screw comprising polymeric material extended downwardly through the second bracket mateably into the first bracket to retain the assembly together.

Abstract: A device for performing a plurality of operations on a workpiece has a combination tool holder and a rotatable spindle for retaining the tool holder. The combination tool holder has a central opening at its forward end for receiving a drill bit and a pair of forwardly extending bosses onto which a pair of cutting tools are received. A slot is provided in the tool holder dividing it into a pair of gripping elements receiving the drill bit, the gripping elements being forced together onto the drill bit when the tool holder is mounted in the spindle.

Abstract: A surgical instrument has a housing which contains a motor that drives a spindle. A tool bit is attached to the motor by a holder that includes a body with a first end portion connected to the spindle, a central portion with a cavity therein, and a second end portion having an aperture through which a shaft of the tool bit passes into the cavity. A pair of lock pawls are pivotally mounted in the cavity with each one having a first tab that enters a slot in the shaft when the lock pawls are in a first position to hold the tool bit in the instrument. The first tabs retract from the slot when the lock pawls are in a second position for changing the tool bit. The lock pawls have second tabs that engage a restrainer only in the second position to prevent the body from rotating. A ring extends around the body and pivots the lock pawls between the first and second positions when the ring moved longitudinally along the body.

Abstract: A surgical instrument has a housing which contains a motor that drives a spindle. A tool bit is attached to the motor by a holder that includes a body with a first end portion connected to the spindle, a central portion with a cavity therein, and a second end portion having an aperture through which a shaft of the tool bit passes into the cavity. A pair of lock pawls are pivotally mounted in the cavity with each one having a first tab that enters a slot in the shaft when the lock pawls are in a first position to hold the tool bit in the instrument. The first tabs retract from the slot when the lock pawls are in a second position for changing the tool bit. The lock pawls have second tabs that engage a restrainer only in the second position to prevent the body from rotating. A ring extends around the body and pivots the lock pawls between the first and second positions when the ring moved longitudinally along the body.

Abstract: A modular surgical drill in the form of a rigid drill shaft and a drill bit which are connected together at the rear end of the drill bit and the forward end of the drill shaft by a tongue-and-groove arrangement. Each of the shaft and drill bit are provided with through bores extending centrally through their entire length. These bores become aligned upon assembly of the drill bit and shaft. The modular drill is intended to be employed with a guidewire for drilling holes into bone. The assembled drill bit and shaft are placed on the guidewire and moved down such guidewire into contact with the bone, whereupon a tunnel may be formed into the bone by rotating and advancing the drill bit along the guidewire. The dimensions of the bore and guidewire are so selected as to prevent the drill bit and drill shaft from moving relative to one another once they are assembled and mounted upon the guidewire.

Abstract: A rotary or rotary/percussion drill bit 10 has a taper socket 14 in one end. A wall 18 bounds the socket 14. A plurality of recesses 20 is provided in the wall. In one embodiment, each recess 20 extends longitudially and resembles a flute. It has a valley 22 flanked by peaks 24. In another embodiment, the recesses may be circumferential, e.g. helical.

Abstract: A reamer tip having a face and a V-shaped indentation formed in the face and having sides, which form with an imaginary plane extending parallel to the face an angle of about 9.degree.-12.degree., preferably about 10.degree..

Abstract: A multi-purpose arrow shaft assembly tool is provided having several implements capable of being received within a handle. One of the implements is an insert arbor over which point inserts and nock inserts may be placed which the inserts are heated and inserted into the hollow arrow shaft. To aid in preparing the shaft for receipt of the inserts, a facing cutter and a burring tool are also provided. The facing cutter has an arbor which guides the cutting blade of the facing cutter to produce a perpendicular cut relative to the longitudinal axis of the arrow shaft. The burr is housed within the handle so that the interior of the handel serves as a guide when deburring the arrow shaft. A nock adjusting implement is also provided which not only aids in the rotation of a friction fit nock within the nock insert, but also serves to record and transfer the relationship between the groove in the nock and one of the veins so that indexing of one arrow may be transferred to other arrows.

Abstract: A cutting tool is disclosed which includes a substantially cylindrical body of a diameter sufficient for receiving a plumbing nipple through a first end of the body. A clamping element is provided adjacent to the first end of the cylindrical body for clamping the body to the plumbing nipple. The claimed cutting tool further includes at least one cutter, and preferably two cutters, located within the cylindrical body and mounted on a shaft which extends beyond a second end of the cylindrical body; the second end being opposite the first end. The cutting tool is adapted for rotation by the shaft which, in turn, can be attached to a power drill, or the like, so that the nipple can be cut from its outwardly directed end inwardly. The cutting tool does not itself rotate but, instead, contains a cutting head attached to a shaft which can be rotated by various rotation devices, such as an electric power drill.

Abstract: A drill with indexable inserts has one center insert (11) and one peripheral insert (12), said center insert having a symmetric drill point (25) on the drill axis (10) with a transverse edge which is continuous with one short edge (27) and one long edge (21,23) and a screw hole offset from the symmetry axis of the drill point (25) towards the side of the long edge (21,23).

Abstract: A cutting insert includes a cutting edge extending obliquely relative to a center line of the insert. A chip breaking recess is spaced inwardly from the cutting edge and extends parallel hereto. A drill tool contains three inserts situated along a common diameter. The center insert has a cutting edge radially overlapping the cutting edges of the other two inserts. Each of the cutting edges of the other two inserts extends axially rearwardly and radially outwardly.

Abstract: A spot drilling and centering drill including a body having a cylindrical head portion and a replaceable indexable insert mounted in the head portion. A V-angled slot is formed directly in the head portion. The insert has two V-angled cutting surfaces with a drill point, each cutting surface fitting within the V-angled slot to locate the drill points on the centerline of rotation of the drill.

Abstract: A cutting tool for expanding or opening up the diameter of boreholes includes at least one reversible knife plate with a front surface. The knife plate can be clamped with at least one clamping shoe into a recess provided in a cutter head. The front surface of the knife plate has at least two grooves which extend essentially parallel and preferably symmetrical with respect to the longitudinal axis of the knife plate. The grooves cooperate with projections provided on the contact surface of the clamping shoe facing the front surface of the knife plate and form a positively locked connection therewith.

Abstract: A center vacuum rotary drill bit including a drill bit body having a top working surface. Formed within the top working surface is a slot having disposed therein an insert positioned within a shim within the slot. The insert includes a pair of oppositely facing generally parallel side surfaces, a pair of oppositely facing generally parallel end surfaces extending between and interconnecting said side surfaces, a pair of oppositely inclined top surfaces extending between and interconnecting said side and end pairs of surfaces, and a bottom surface having a concave depression formed therein. The bottom surface extends transversely to and interconnects the side and end pairs of surfaces. A support bar including a convex top surface is disposed within the slot between the insert bottom surface and the slot such that the convex top surface supports the concave depression of the insert. In a preferred embodiment, the modulus of elasticity of the support bar is greater than the modulus of elasticity of the shim.

Abstract: A drill bit has a throw-away drill bit tip in the form of an insert (21, 31) secured to a shank (22, 32) to be mounted in a drilling tool. The insert (21, 31) is disengageably mechanically connected with the shank (22, 32) without any screws. At least a cutting edge of the insert (21, 31) is made of a diamond or cubic boron nitride sintered body, and the shank (22, 32) is made of steel. Due to this structure, the insert (21, 31) has an excellent wear resistance and an adhesion resistance. The shank (22, 32) has sufficient toughness against breakage. Such a drill bit does not require any resharpening for continuous use during bit life.

Abstract: A drill bit has a throw-away drill bit tip in the form of an insert (21, 31) secured to a shank (22, 32) to be mounted in a drilling tool. The insert (21, 31) is disengageably mechanically connected to the shank (22, 32) without any screws. The insert (21, 31) is formed of a silicon carbide whisker reinforced alumina sintered body, and the shank (22, 32) is made of steel. Due to this structure, the insert (21, 31) has an excellent wear resistance and an adhesion resistance. The shank (22, 32) has a sufficient toughness against breakage. Such a drill bit does not require any resharpening for continuous use during bit life.

Abstract: Tooling to form a countersink or counterbore in a workpiece, the countersink or counterbore intersecting a bore hole in the workpiece, comprises a first part defining an axis to extend axially forwardly in the bore hole; a carrier body having a forward portion for piloting reception in the bore hole, and having a rearward portion adjustably carried by the first part; a cutter blade on the carrier, the blade projecting radially relative to the carrier body and forming at least one cutting edge shaped to form the countersink or counterbore; and a spacer on the carrier body and adjustably retained between the first part and the blade for holding the blade in predetermined axial position on and relative to the carrier body.

Abstract: A cutting tool assembly is disclosed as having a cutting blade of U-shape and a holder with flexible arms which may be expanded to grip the cutting blade.

Abstract: There is disclosed a boring tool which exhibits a cutting head with several cutting plates arranged on the periphery of the cutting head. Each of the cutting plates are pressable with a fastening device against a shoulder of the cutting head. The distances of the cutting plates from the longitudinal axis of the cutting head are slightly different. The cutting heads are staggered with respect to one another in the direction of the longitudinal axis. The cutting plates (1, 2, 3) are formed in a circular shape and are arranged so that the force exerted during operation of the cutting head by the cutting plates compensate each other. The effective cutting edge sections, projecting in an axial plane, continually blend into one another. The boring tool is particularly suitable as a fine boring tool for the production of precision bores.

Abstract: Tooling to form a countersink and counterbore in a workpiece includes:(a) a first part defining an axis and that extends axially forwardly in a bore hole in the workpiece,(b) a rotatable carrier connected with that first part,(c) and a cutter blade on the carrier, the blade projecting radially relative to the first part forming at least one cutting edge spaced outwardly of a cylinder defined by that first part, the cutting edge shaped to form the countersink and counterbore at one end of the bore hole.

Abstract: An insert boring tool includes radially outward and inward cutting inserts mounted thereon. The radially outward and inward inserts are arranged such that end cutting edges of the respective inserts are intersected with each other at a point of intersection in loci of rotation of the respective inserts in a plane containing an axis of a tool body. The radially outward and inward inserts are positioned such that, assuming that a radial distance between the point of intersection and a radially outermost end of the end cutting edge of the radially outward insert is A, and a radial distance between the point of intersection and a radially innermost end of the end cutting edge of the radially inward insert is B, a ratio of A/B takes a value of from 2/8 to 45/55.

Abstract: A drill having two or more cutting edges is provided with interchangeable cutting members. The cutting members are fastened by screws in corresponding recesses formed in the drill bit. The cutting members are embodied by interchangeable plates and provided with fastening portions behind the main cutting edge, in the direction of cutting. The screws engage through these fastening portions in threaded bores formed in the front face of the drill bit.

Abstract: An improved tool holder for a metal removing machine includes a generally cylindrical head having a longitudinal passageway formed co-axially therethrough. The outer cylindrical surface of the head includes means for supporting one or more cutting tools thereon. The inner surface of the passageway formed through the head includes a threaded intermediate diameter portion and a relatively smaller diameter portion. An insert ring is disposed within the passageway at the junction of the intermediate and smaller diameter portions of the passageway. The insert ring includes a ramp surface which provides a smooth transition from the intermediate diameter portion to the relatively smaller diameter portion. A generally hollow cylindrical collet is provided which is sized to fit within the threaded intermediate portion of the passageway. The collet includes an enlarged end portion having a first chamfered edge adapted to abut the ramp surface of the insert ring when the collet is inserted in the passageway.

Abstract: An apparatus for obtaining a core sample includes an elongate guide pin and a hollow drill element. The drill element has an open front end provided with a cutting edge and an open rear end provided with an axial engagement structure for engaging an associated driving tool. A longitudinal aperture extends from the front end of the drill element to the rear end with the aperture having a smooth uninterrupted interior periphery throughout at least a major portion of its length. A spacer slug is adapted to be positioned in the drill element longitudinal aperture. The spacer slug has a centrally disposed aperture extending longitudinally therethrough and sized so that the guide pin can extend therethrough. The spacer slug has a suitable outer diameter so that it can slide in the drill element longitudinal aperture.

Abstract: The invention relates to a drill for metal drilling, comprising a drill body and a drill tip provided with cutting portions. The drill tip is detachably secured to the drill body by means of fastening devices, which are arranged on opposite sides of the centerline (CL) of the drill. The planar lower face of the drill tip is provided with a central tap which engages in a central recess in the mainly planar front surface of the drill body in order to center the drill tip relative to the drill body. A central fluid passage is formed in the drill body, which transforms into eccentrically arranged fluid passages in the drill tip. The fastening devices form at least partly walls in the eccentrical fluid passages.

Abstract: A drill has a shank with a central axis of rotation and at least one insert on one end of the shank. The insert has at least two cutting edges. The first cutting edge has a negative radial rake and the second cutting edge has negative axial and positive radial rake surface. The first and second cutting edges cooperate to form a radiused hole when rotated about the central axis. Also, the cutting insert is composed of hard wear resistant material. The insert has top and bottom faces and a peripheral wall joining the top and bottom faces. The insert body is polygonal when viewed in plan. One of the top and bottom faces acts as a seating face and the other acts as a cutting face. There are first cutting edges formed on opposite sides of the cutting face at the juncture of the cutting face with the peripheral wall. One end of each of the first cutting edges terminates in a juncture with a second cutting edge that extends from the cutting face toward the seating face.

Abstract: To achieve reliable fastening of a toothed cutter carrier on the toothed bearing surface of a tool body, and to achieve favorable force ratios, in a rotary cutting tool, in particular a drilling head, the tooth formation of the bearing surface is constructed in a sawtooth shape with steep tooth flanks and inclined tooth flanks, the steep tooth flanks being disposed substantially on that side of the teeth which is orientated towards the cutting element of the cutter carrier. The tooth formation on the cutter carrier is constructed so that it is substantially similar to the tooth formation of the bearing surface for interengagement therewith.

Abstract: A material removing tool includes an elongated shank having a rear end portion arranged to be driven by the motor of a boring or milling machine and a front end portion provided with a coaxial stub which is received in a socket between two legs of an adapter which carries the cutting implement. At least one of the legs has a radial hole which is in near register with a tapped bore of the stub. The shank portion of a screw, whose head bears against a conical surface surrounding a portion of the hole in the one leg, meshes with the threads in the tapped bore of the stub to urge the rear edge faces of the legs against complementary surfaces provided on two shoulders forming part of the front end portion of the shank. This enhances the resistance to bending stresses and prevents wobbling or vibration of the adapter relative to the shank.

Abstract: A rotary material removing tool whose holder can be installed in and rotated by a milling or like machine. The front portion of the holder has a transverse slot flanked by two prongs and receiving a portion of a flat cutter which is held in the slot by one or more coupling screws in such a way that its rear surface is urged against the bottom surface in the slot. The coupling screw is received in a bore of one of the prongs and its head extends into a bore of the cutter. The peripheral surface of the head and/or the surface surrounding the corresponding portion of the bore in the cutter is conical, and the two surfaces cooperate to urge the rear surface of the cutter against the bottom surface in the slot when the screw is driven home. To this end, the axis of the bore which receives the shank of the screw is disposed between the axis of the bore in the cutter and the bottom surface in the slot.

Abstract: A rotary cutting tool which comprises an elongated body attached to be rotatably driven around its longitudinal axis. An axially extending slot is formed at one end of the body while a cutting insert having a cutting edge is axially insertable into the slot. A pair of diverging abutment surfaces on the body extend inwardly into the slot. These abutment surfaces cooperate with diverging mounting edges formed on the cutting insert to automatically orient the cutting insert upon insertion into the slot to a predetermined position with respect to the body. The cutting insert is secured to the body in a conventional manner, such as soldering.

Abstract: A self-tapping screw whose stainless steel shank has a slotted free end in which a plate-shaped, carbide drill bit is fastened, the bit being dimensioned and arranged to drill a hole smaller than the major diameter of the tapping threads.

Abstract: The invention relates to a combination of a tool holder having a socket member with a cylindrical axial bore, and a tool shaft releasably received therein. A driving element is displaceably mounted in the socket member so as to be movable between an extended position in which part of the driving member extends into the axial bore, and a retracted position in which the driving member is retracted from the bore, and the driving element is biased towards its extended position by spring means. The tool shaft received in the tool holder has a transversely extending recess receiving the driving element in its extended position, whereby the tool shaft is locked in the tool holder. Adjacent to the free end of the tool shaft the said recess defines an abutment surface cooperating with an inner surface part of the driving element in its extended position so as to prevent axial withdrawal of the tool shaft from the axial bore of the socket member.

Abstract: An indexable insert drill employing a plurality of inserts located substantially in a single radial plane characterized by a round innermost insert having its arcuate cutting edge extending across the axial center line of the drill. One or more supplemental inserts, preferably square in configuration and including chip interruption notches positioned for positive axial lead, continue the cutting action radially beyond the arcuate center cut of the round insert with an outermost corner adapted to finish cut the side wall diameter of the hole.

Abstract: The invention is directed to a retainer having a primary bore and a secondary bore parallel thereto with a web therebetween, a tool or die element having a shaft-like portion and also a flange on one end, a groove in the shaft-like portion, said groove extending through said flange to provide a V-shaped notch therein, a frangible rod-like element adapted to project into the secondary bore while positioned in the groove and notch to properly guide and orient said tool in the retainer.

Abstract: A hole cutter for hard material such as ceramic tile. The cutter has a cylindrical body which has an axial opening and a pilot drill is mounted therein. The drill and the opening are non-circular, for example, hexagonal, in order to prevent relative rotation between the drill and the body. The body has a plurality of axially extending recesses in its periphery and an axially extending cutting blade which has an arcuate cross-section is positioned in each recess. The drill and the blades have carbide tips. The tips on the blades have beveled outer corners which prevent them from radially spreading when drilling and which minimize chipping the tile or its glaze. Mounting holes through the blades and in the recesses are spaced circumferentially away from their center lines to prevent improper mounting.

Abstract: A hole-forming tool comprising a body adapted for being driven in rotation and including a front portion having an axial bore. A plurality of cutting plates are removably secured to the front face of the front portion of the body for cutting a ring of material from a metal workpiece while leaving a non-cut core in the axial bore. The body carries an ejector in the bore for ejecting the core at the end of the cutting operation. The ejector can be a slidable member which is resiliently urged into the bore and which opposes the core to effect displacement thereof from the workpiece when the tool has completely cut through the workpiece. A system is also provided for axially distributing a lubricating liquid through the bore to the cutting plates.

Abstract: A deep-hole boring head comprising a body member arranged to support a boring tool at one end and to be attached to a boring bar at the other end, the body member being provided with a number of guidance members in strip form adjustably mounted thereon and arranged during use of the boring head to contact the surface of the hole bored by the boring tool so as to guide the tool during the boring of a deep hole, and adjustment means connected with the guidance members and arranged, on movement of the guidance members in directions substantially parallel to their longitudinal axes, to adjust the radial distances of the guidance members from the center line of the hole to be bored.