Abstract: The present invention discloses a reamer (20) and a method for reaming, for enlarging a pre-existing hole in a workpiece by rotational and axial cutting. The reamer (20) includes a body (24) extending from a shank (22). The body (24) has a first flute (30) providing a first flute cutting edge (32) at a distal end (34) of the body (24) for imparting a first cutting operation to the workpiece. The body (24) has a helical flute (42) providing a helical flute cutting edge (46) in the body distal end (34), radially spaced apart from the first flute cutting edge (32) for imparting a helical cutting operation to the workpiece. The first flute and helical flute cutting edges (32, 46) concurrently and collectively perform the first and helical cutting operations to a sculpture surface of the workpiece, thereby improving tolerances of the cutting operations, varying loads imparted to the workpiece and the reamer (20), and reducing heat generated therebetween.

Abstract: A method and apparatus for drilling glass using a drill and drill bit. The method utilizes a drill bit having a plurality of shaft diameters, and being provided with a plurality of types of abrasives. By providing a coarser abrasive on a narrow portion of the bit, and finer abrasives on a wider portion of the bit, drilling can be accomplished while reducing the incidents of micro fracture in the glass being drilled. Providing an even narrower connection shaft between the two cutting portions of the drill bit further facilitates reduction in micro fractures created during the drilling process.

Abstract: A drill for producing a deep hole that does not produce a bend of the hole during cutting. A drill body is spirally provided with a pair of cutting edges. The cutting edges are spaced at about 180 degrees apart around a core of the drill and the edge line of a tip section of the cutting edges is depressed toward the core of the drill. When the outside dimension of the drill is 7.4 mm, an angle between the edge line and a line perpendicular to the core is 5 degrees and the core thickness (t) is 2.96 mm. Further, the drill is provided with a guide section for preventing bending during a cutting operation. The guide section is provided on a heel side on the same circumference as that on which the outer end section of the cutting edges passes.

Abstract: A solid drill bit for machine tools. has a bit body and two movable inserts located a radial distance apart in insert seats of the bit body. The inserts have a rectangular or quadratic contour, project axially over the bit body with their major cutting edges and overlap in their working area. The outer movable insert projects radially beyond the periphery of the bit body with its outer cutting edge corner and with the adjoining minor cutting edge. Starting from the cutting edge corner, the minor cutting edge is inclined in the direction of the bit body at a setting angle of less than 3.2 °. The minor cutting edge has a guiding edge that is slidingly supported against the wall of the bore over at least part of its length due to a radially outwardly oriented thrust force.

Abstract: A tool having a deployable cutting blade for making an undercut in a substrate is disclosed. The tool has a chamber positioned between its cutting tip and its tang. The cutting blade is movably mounted within the chamber. The blade is movable by sliding, pivoting or deflecting on a cantilever mounting and is movable between a retracted position within the chamber and an extended position projecting outwardly to engage and cut the substrate. Actuators for moving the blade include an eccentric cam mounted on a camshaft, a push rod and an inflatable balloon. Blades are also resiliently mounted and oriented so that their engagement with the substrate will cause them to retract into the chamber when the tool rotates in one direction and deploy into the extended position when the tool rotates in the opposite direction.

Abstract: A method and apparatus for cold forming a battery terminal having a base and an insert. The insert includes a first portion encapsulated within the base and a second portion that extends beyond a first side of the base.

Abstract: A milling head for a rotary tool, which is preferably utilized to process, prepare, or otherwise impart a desired finish to a workpiece, preferably an end portion of a tube. In a preferred embodiment, the milling head includes at least three different cutting or milling surfaces each capable of performing a distinct operation on a workpiece. In one embodiment, the milling head includes a) a membrane milling and/or outer diameter tube film removal element; b) a beveling element capable of imparting a bevel to the tube end; and c) an inner diameter tube film removal element. The milling head milling surfaces are adjustable in order to accommodate tubes of different wall thicknesses and diameters. The milling head is preferably attached to a rotary milling tool, i.e., a drill. Methods of performing operations on workpieces with the milling head are disclosed.

Abstract: A tool for chip removing machining includes a drill and a countersink mounted to the drill. The drill includes a protruding land and at least one chip flute. The countersink includes a body, a plurality of inserts received in respective insert pockets formed in the body, and a plurality of clamps for fixing respective inserts in the pockets. In order to be able to adjust the location of the inserts, pins are arranged for displacement relative to the body. The pins are slidably disposed in holes formed in the body, and adjustment screws are mounted in the body and arranged to displace a respective pin and the associated clamp and cutting insert in response to movement of the adjustment screw.

Abstract: A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project laterally for cutting engagement with a work-piece while the tool spins about its axis. The tool also orbits within or about a work piece, and in one orbit of the tool in a helical cutting path relative to the work piece a number of complete turns of the screw-thread are formed which is equal to the number of teeth of the insert in engagement with the work-piece. A secondary cutter carried on the thread cutting milling tool provides for formation of a pilot portion or counter bore on the work piece at an end of the screw thread. The pilot portion or counter bore provides for alignment of a threaded member which is to engage the screw thread.

Abstract: A drill bit consists of a bit body having a forward end and a slot in the forward end to hold a hardened cutting blade. The bit body has a table near the center of the blade to reduce the speed at which the drill bores into hard material. The blade has a central slot extending into the forward end thereof such that the slot defines inner side walls and a bridge extending between the inner side walls. The bridge has sloping sides the define a central cutting edge so as to cut particles of hard material accumulating in the slot. The inner side walls intersect the leading faces of the blade and form cutting edges which further cut particles loosened at the center of the cut. Also, relief flats relieve the concentration of forces at the ends of the primary cutting edges of the blade.

Abstract: A tool employs a connect-disconnect coupling for a power drill to hold a multi-functional bit having at its one end a drill element adapted to form a hole and a countersink and at its other end a driver element to drive a screw or other type of fastener.

Abstract: A twist drill or drill/chamfer tool that comprises a drill with a shaft section. The shaft section is provided with a twisted flute and a clamping ring as the retainer of a facing cutter. The clamping ring tubularly encloses the shaft section or the drill shaft and can be fixed on the shaft section or drill shaft in different axial adjustable positions. The clamping ring can be tensioned on the drill with tension screws that extend through the clamping ring substantially radially to the axis of the drill. The tension screws impinge the surfaces of the twisted flutes, which twisted flutes are enclosed by the clamping ring indirectly with a clamping shoe that is interposed in a twisted flute.

Abstract: A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project laterally for cutting engagement with a work-piece while the tool spins about its axis. The tool also orbits within or about a work piece, and in one orbit of the tool in a helical cutting path relative to the work piece a number of complete turns of the screw-thread are formed which is equal to the number of teeth of the insert in engagement with the work-piece. A secondary cutter carried on the thread cutting milling tool provides for formation of a pilot portion or counter bore on the work piece at an end of the screw thread. The pilot portion or counter bore provides for alignment of a threaded member which is to engage the screw thread.

Abstract: A modified prior art twist drill embodies structural features that require less energy to drill a hole during a normal plunge operation and allow for lateral cutting movement during extraction of the twist drill from a drilled work piece.

Abstract: The present invention provides a new drilling tool useful in machining hydraulic port seals for fluid power ports. The drilling tool drills the port hole to size in a solid material for the minor thread diameter in combination with forming the port in a single operation. The drilling tool has a tool holder having a rotational axis, a first drilling insert having cutting surfaces on a first side and a mounting surface on a second side, at least one second drilling insert having a predetermined cutting surface portion and a mounting portion which is mounted on the holder at a location from the rotational axis of the holder. The at least one second drilling insert has first and second portions which engage and machine a work piece in a drilling operation to form a spot face and a seal form.

Abstract: A drilling apparatus includes a drill, a surge control device and a countersink limiter coupled to the drill, and a rotatable cutting tool coupled to the countersink limiter. The cutting tool includes a drilling portion operable to form a hole, a countersink portion operable to form a countersink, and a fillet portion operable to form a longitudinally-curved transition between the hole and the countersink. The depth of the countersink is controlled by the countersink limiter. The surge control device is operable to control the axial speed of the cutting tool.

Abstract: There is now provided a rotary cutting tool, particularly a drill, that has at least two cutting edges that respectively comprise a main cutting edge and that respectively are disposed, particularly symmetrically, with respect to the central axis of a cutter portion, whereby the radius of the main cutting edges is less than the maximal cutting edge radius of the cutter portion. A secondary cutting edge is associated with a main cutting edge, this secondary cutting edge is curvilinear in at least a portion and is configured as smooth finishing cutting edge, this secondary cutting edge comprises a plurality of curve-forming radii, whereby in an outer smooth finishing region within the region of the maximal cutting edge radius, the curve-forming radius of the smooth finishing cutting edge is greater than the maximal cutting edge radius. The cutter portion that is adjacent to the outer smooth finishing region is tapered by a taper that diminishes the size in the direction away from the main cutting edges.

Abstract: A tool for the precision machining of surfaces in workpieces comprising at least two cutter inserts in the periphery of the tool body and each having at least one defined cutting edge. The cutter inserts are of different materials at least in the region of the at least one cutting edge. Guide strips on the tool body periphery between the cutter inserts guide the tool body.

Abstract: A drill bit is disclosed having a cutting portion having a plurality of axially aligned, graduated cutting members. Each of the members has cutting edges defined by a single slot extending therethrough. A tip portion at one end of the cutting portion defines at least a pair of cutouts therein, wherein one of the cutouts is aligned with the slot.

Abstract: The present invention is directed to a coring drill and method for preparing a block for containing a receptacle assembly. The coring drill comprises a generally cylindrically-shaped corer hub having a longitudinal drilling axis. A generally cylindrically-shaped first corer has a first-corer axis coaxial with the longitudinal drilling axis and a first coring end having a first-coring diameter. The first-corer is removably attachable to the corer hub. A generally cylindrical-shaped second corer has an second-corer axis coaxial with the longitudinal drilling axis and a second coring end having a second coring diameter greater than the first coring diameter. The second-corer is attached to the corer hub. A generally cylindrical-shaped counter-borer has a counter-borer axis coaxial with the longitudinal drilling axis and a counter-boring end having a third coring diameter greater than the second coring diameter. The counter-borer is attached to the corer hub.

Abstract: The present invention relates to a spot and chamfer drill insert which can be utilized to create accurately located spots for subsequent drilling operations while simultaneously providing a chamfer for the finished hole. The present invention utilizes web thin clearance surfaces that are formed at web thin clearance angles, wherein the web thin clearance angles are oriented with respect to a projected plane normal to a plane through the web thin cutting edge and parallel to the longitudinal axis of the insert, wherein the projected plane is tangent to the web thin cutting edge.

Abstract: A method of producing a nut having a drive area and a clamping area, and a screw tap for performing the method. A bore hole running through the clamping and drive areas is produced in a cylindrical manner. The screw tap is screwed into the cylindrical bore until a predetermined position is reached. The screw tap is successively provided, when seen in an axial direction from the front side thereof, with a centering/cutting section, an adjoining cutting section which is used to produce a conical internal screw thread section in the clamping area, and a cutting section which is used to produce a cylindrical internal screw thread section in the drive area.

Abstract: A finishing tool rides upward and downward on the surface of a tap. A spring urges the finishing tool toward an outer end of the tap. The finishing tool is guided along a helical flute on the surface of the tap. Cutting edges on the finishing tool are ground to deburr the perimeter of a hole being tapped either during entry of the tap into the hole or during withdrawal. When the cutting edges provide deburring during withdrawal, the helix angle of the helical flute must be less than a critical helix angle to avoid jamming. When the cutting edges provide deburring during entry of the tap, the critical helix-angle limitation is eliminated.

Abstract: A reaming tool is capable of reaming out several axially interspaced borings of a workpiece. The reaming tool includes a guide shank that can be clamped into a machine spindle and which can be supported in prepared borings of the workpiece to be machined by using external supporting elements. The reaming tool also includes a reaming head coaxially connected on the front end thereof. In order to be able to easily change a worn tool, the reaming head is connected to the guide shank by an auto-centering clamping mechanism. The supporting elements positioned in the proximity of the clamping mechanism can, during a clamping process, be radially spread outwardly from a smaller dimension to a predetermined diameter guide dimension.

Abstract: A tool having a deployable cutting blade for making an undercut in a substrate is disclosed. The tool has a chamber positioned between its cutting tip and its tang. The cutting blade is movably mounted within the chamber. The blade is movable by sliding, pivoting or deflecting on a cantilever mounting and is movable between a retracted position within the chamber and an extended position projecting outwardly to engage and cut the substrate. Actuators for moving the blade include an eccentric cam mounted on a camshaft, a push rod and an inflatable balloon. Blades are also resiliently mounted and oriented so that their engagement with the substrate will cause them to retract into the chamber when the tool rotates in one direction and deploy into the extended position when the tool rotates in the opposite direction.

Abstract: A chuck for securing a working tool in a machine tool and including a one-piece, ring-shaped carrier member arranged outside of the end surface of the receiving end region of the chuck and parallel thereto and provided with cutting region having additional cutting elements distributed circumferentially around the receiving bore of the receiving end region and extending transverse to a plane defined by the ring-shaped carrier member and projecting away from the carrier member which secured by crews to the receiving end region of the chuck.

Abstract: A blind setting rivet assembly capable of permanently fastening one or more sheet metal work pieces or the like together is disclosed. The rivet assembly may be self polishing and self tapping and may also provide a hollow cylindrical threaded bolt head onto which a nut may be affixed to provide a means to removably attach other work pieces, components or the like. The rivet assembly comprises a rivet body having a hollow tubular sleeve and an enlarged flattened head. The rivet body surrounds a mandrel that may have a weakened area of reduced diameter to allow detachment of the mandrel shaft following application of sufficient axial force to the shank. This application of force sets the rivet by causing a tapered shoulder section of the mandrel to deform the rivet sleeve. The mandrel shank may be terminated in a screw tip. This screw tip punctures, spreads, self-taps, and self-polishes an aperture in the work pieces through which the rivet sleeve passes.

Abstract: The invention provides an apparatus for positioning a cutter a tool relative to a spindle of a machine tool. The machine tool include a spindle having a rotating axis and a spindle housing for supporting the spindle for rotation about the rotating axis. The apparatus includes a shank which is adapted to be mounted to the spindle of the machine tool. A piston is provided in the shank for movement along an axis which defines an angle relative to the rotating axis of the spindle. A cutter, for machining a workpiece, is connected to the piston. A first fitting member is provided on the shank and a second fitting member is provided on the piston so as to be able to fit to the first fitting member. Each of the first and second fitting members include an abutment provided on the first and second fitting members to contact each other in the direction of the axis.

Abstract: A tool for cutting a plastic pipe comprising a concave guide section having a central aperture; and a plunger having a longitudinal axis extending through the central aperture and at least one blade extending in generally radial relation from the central axis inside the concave guide section.

Abstract: A boring head is disclosed in which a plurality of boring tools provide a plurality of simultaneous cuts to a workpiece. A tool holder supports the plurality of boring tools generally perpendicular to a bore axis, so as to increase the rate of a boring operation.

Abstract: A deep hole cutter for a gun drill system includes a tool shank and a cutting head with two or more cutting edges. The tool shank and the cutting head are separate members connected strongly by threads. The shavings produced by the cutting edges can be discharged together with the coolant supplied through the hole cutter. The shaving dischargeability is improved for higher cutting efficiency.

Abstract: A drill bit is disclosed having a cutting portion having a plurality of axially aligned, graduated cutting members. Each of the members has cutting edges defined by a single slot extending therethrough. A tip portion at one end of the cutting portion defines at least a pair of cutouts therein, wherein one of the cutouts is aligned with the slot.

Abstract: A twist drill or drill/chamfer tool that comprises a drill (1) with a shaft section (2) that is provided with a twisted flute, and a clamping ring (4) as the retainer of a facing cutter (5). Said clamping ring tubularly encloses the shaft section (2) or the drill shaft (30) and can be fixed thereon in different axial adjustable positions. The clamping ring (4) can be tensioned on the drill (1) by means of tension screws (6) that extend therethrough substantially radially to the axis (7) of the drill. The tension screws (6) impinge the surfaces of the twisted flutes (9, 10) which are enclosed by the clamping ring (4) indirectly with a clamping shoe (19, 20) that is interposed in a twisted flute (9, 10).

Abstract: A cutting tool for metallic or other non-wood materials is provided having a tool body with a leading cutting edge for making a first roughing cut on a workpiece and having a second trailing cutting edge so arranged on the same tool body relative to the first cutting edge that the second cutting edge makes a second finishing cut of the workpiece to provide final dimensions and surface integrity when the workpiece and the cutting tool are relatively moved to engage the cutting tool and workpiece. For a cutting tool comprising a drill, the leading cutting edge cuts a smaller diameter hole than the trailing cutting edge. For a cutting tool comprising a turning or milling tool, the leading cutting edge cuts a larger diameter surface on the workpiece than the trailingcutting edge. Also provided is a drill having a leading end provided with multiple cutting tips spaced laterally apart on the leading end in a manner to reduce deflection of the drill and produce a straighter hole in a workpiece.

Abstract: The invention concerns a tool head for employment in machine tools with multiple indexable cutting inserts (20, 20′, 20″). The tool head includes a base body (12), a tool shank (14) projecting axially beyond the base body (12) and at least two blade receptacles (18, 18′, 18″) which are spaced apart at least in the circumferential direction for receiving respectively one indexable cutting insert. The active main cutting edge of the different indexable cutting inserts therein have a differing adjustment angle (&agr;, &agr;′, &agr;″) relative to the axis of the base body. In order to reduce the blade costs, the same type of indexable cutting insert (20, 20′, 20″) is provided in the different blade receptacles.

Abstract: A drilling tool includes a basic body defining a center axis of rotation and having two chip channels and two replaceable indexable cutting bits in the form of a center bit and a periphery bit mounted in respective center and periphery pockets formed in an axially front end of the basic body. The center bit and the center pocket are spaced radially from the periphery bit and the periphery pocket along a first diametrical plane of the basic body. At least the center bit includes four identically-shaped cutting edges, one of which constituting an operative cutting edge intersected by a second diametrical plane oriented perpendicularly to the first diametrical plane. Each cutting edge of the center bit comprises first and second part edges joined by a transition edge portion.

Abstract: A drilling tool set includes a plurality of drilling tools having different operative drill diameters to blast drill holes of different respective diameters. Each drilling tool of the set has a basic body defining a central axis of rotation, and two replaceable indexable bits including a center bit and a periphery bit which are mountable in respective center and periphery pockets formed in a front end of the basic body. The periphery bits of the respective drill tools of the set are identical, and the center bits of the respective drill tools of the set are identical. Each of the center and periphery pockets of each drill tool defines a radial center point. A first of the drill tools has a smaller operative drill diameter than a second of the drill tools. The first tool includes a first periphery pocket and a center pocket. The center point of the first periphery pocket is disposed closer to the axis than is the center point of the second periphery pocket.

Abstract: An improved slot-drilling cutter has a tool body with plate seats at the end, which are arranged symmetrically in respect to each other. Cutting plates are arranged on the seats, whose cutting edges, as well as possibly cutting edges 41, 42, are set identically, i.e. which cover each other completely in the circumferential direction. Because of this, respectively two cutting edges are active for the drilling operation, as well as for the milling operation, which increases the metal cutting yield and allows the same advancement when drilling, as well as when milling. The slot-drilling cutter is free of lateral forces because of the symmetrical design, which permits a high degree of working precision in spite of large advancement moves.

Abstract: A finishing tool rides upward and downward on the surface of a tap. A spring urges the finishing tool toward an outer end of the tap. The finishing tool is guided along a helical flute on the surface of the tap. Cutting edges on the finishing tool are ground to deburr the perimeter of a hole being tapped either during entry of the tap into the hole or during withdrawal. When the cutting edges provide deburring during withdrawal, the helix angle of the helical flute must be less than a critical helix angle to avoid jamming. When the cutting edges provide deburring during entry of the tap, the critical helix-angle limitation is eliminated.

Abstract: A tool for chip removing machining includes a drill and a countersinker mounted thereto. The countersinker comprises two half-sections that are clamped to each other and to the drill. The drill includes helical flutes defining respective chip-removal channels. Each half-section includes a connection portion received in a respective flute of the drill. The connection portion has a shape generally corresponding to that of the chip flute, so as to be form-locked within the flute. Each connection portion includes a convex surface facing the flute, and a concave surface facing away from the convex portion. The convex surface can be pressed against the concave wall of the flute, whereby the concave surface forms a section of a wall of a respective chip-removal channel.

Abstract: Productivity improves by 30% or more when a single drill bit is used to drill a hole for a threaded metal rod and a countersink hole wherein a metal nut is secured on the rod. Flush wood surfaces are provided for parapet walls and similar structures via one drilling step in comparison with two drilling steps currently being used.

Abstract: A rock drill has at least one hard material insert (2) with at least two cutting edges (3, 7) consisting of hard material and extending radially to the drill axis (A), whereby, in a radial range of 20% to 50% of their drilling radius, at least two cutting edges (3, 7) each have an axial recess (4), and the cutting edges (3, 7) rotating around the drill axis (A) extend with their cutting edges in their entirety without any gaps over the entire drilling radius.

Abstract: A rock drill head including a radially extending groove (2a) formed in a head body, a recess (5) formed inside the groove (2a); and at least two, substantially plate-shaped, hard-material inserts located in the groove (2a) and having each a radially extending, segment (4a, 4b) engaging in the recess (5).

Abstract: A multi or single cutter reaming tool has a shaft and a shaped head with at least one cutter. The shaped head is produced from a blank having a base body of a base material on its envelope surface with at least one rectilinear or helical groove-shaped recess running around it, into which high hardness cutting material is sintered. The high hardness cutting material includes at least one cutter having cutting surfaces formed by the introduction of a chip groove by a grinding wheel into the base body and movement of the grinding wheel toward the high hardness cutting material.

Abstract: The present invention provides a novel drill insert having chipbreakers, or chip splitting grooves formed through the cutting surfaces. The cutting tool insert has a specialized geometry including a chip splitting groove formed at a negative rake angle. The chip splitting grooves increase the cutting efficiency of the tool while allowing the edge strength to be increased while also allowing higher feed rates.

Abstract: A tandem tap for cutting screw threads into a bore comprises straight flutes with a spiral point along the front section for pushing the chips generated thereby forward and spiral flutes along the rear section for removing the chips generated thereby rearward in an opposite direction. The tap prevents build up of chips in the transition area between front and rear cutting sections of the tap.

Abstract: A tandem tap for cutting screw threads into a bore comprises straight flutes with a spiral point along the front section for pushing the chips generated thereby forward and spiral flutes along the rear section for removing the chips generated thereby rearward in an opposite direction. The tap prevents build up of chips in the transition area between front and rear cutting sections of the tap.

Abstract: The conduit reamer assembly comprises: a spindle having a main body portion, a distal end and a proximal end; drive structure on the spindle for mating with corresponding drive structure in a rotatable drive structure in or on which the conduit reamer assembly is mounted; a conduit reamer mounted on the spindle and comprising at least two stepped cylindrical sections including a first cylindrical section and a second larger diameter section; a first plate-like member extending radially outwardly of the first cylindrical section and having a generally hook-shape defining a U-shaped space between the cylindrical section and an outer axially extending finger of the plate-like member; the second cylindrical section having a second plate-like member extending generally radially outwardly from the second cylindrical section and defining a U-shaped space between the second cylindrical section and an outer axially extending finger; and the conduit reamer being fixed against rotation on the spindle and the U-shaped sp

Abstract: A tool holder comprising an elongated connector means having a first end and a second end, where the elongated connector means has a central longitudinal hole, of a cross-section corresponding to a cross-section of a mounting portion of the tool bit, at the first end, and a tool mount at the second end, and a first sleeve arranged to reciprocally slide over the connector means between a first end position and a second end position, the first sleeve having a third end facing the tool bit and a fourth end facing the hand tool.

Abstract: The present invention provides a novel drill insert having chipbreakers, or chip splitting grooves formed through the cutting surfaces. The cutting tool insert has a specialized geometry including a chip splitting groove formed at a negative rake angle. The chip splitting grooves increase the cutting efficiency of the tool while allowing the edge strength to be increased while also allowing higher feed rates.