Abstract: A milling cutter comprises a cutter body having at least one insert blade station. At least one insert blade is operably connected with the cutter body at the insert blade station. The insert blade has opposite side faces, and a plurality of peripheral edge faces, with at least one cutting edge formed at the intersection of one side face and one edge face. The insert blade is oriented in the cutter body such that the one edge face defines a tooth face against which a workpiece impinges during cutting, and the one side face defines a clearance space between the insert blade and the workpiece. The one side face is convex in shape to reduce the clearance space for improved cutting efficiency and blade longevity, without causing undesirable contact between the other portions of the insert blade and the workpiece.

Abstract: A replaceable on-edge cutting insert is especially adapted for use in end-milling cutters of small diameter, viz., in the size range down to one-half inch in diameter, and with cutting geometry which positions the rake face of the insert in the cutter body with substantially neutral radial rake and positive axial rake. A modified form having a cylindrical primary clearance land is used in the tip cutting positions of a ballnose end mill.

Abstract: A debarking device comprising a debarking arm with a debarking tool mounted to the end thereof. The debarking tool has a curved bearing surface and the debarking arm is provided with a curved recessed seat for receiving the debarking tool. The bearing surface of the debarking tool and the recessed seat of the arm are provided with guides for allowing guided adjustments in the orientation of the debarking tool relative to the debarking arm. Further, the debarking device includes a fastener for retaining and locking the debarking tool at a desired adjusted orientation with respect to the arm.

Abstract: A metal cutting tool having an exchangeable cutting insert mounted on a replaceable cartridge seat releasably fitted in a tool holder of the cutting, the cartridge seat comprising a body portion with a receiving pocket formed therein, an axially directed external surface of the body portion and a substantially planar rear surface thereof; the receiving pocket being formed with a substantially planar insert receiving surface; the tool holder being formed with an insert receiving cavity having an axially directed internal surface adapted to receive the body portion and a substantially planar end surface adapted to abut said rear surface; one of said axially directed surfaces being substantially cylindrical and the other being formed with three suitably located, axially directed protrusions so that upon the screw coupling together of the cartridge seat in the receiving pocket the body portion pivots about its region of abutment so as to be clamped against the protrusions.

Abstract: The clamping mechanism and companion cutting insert disclosed are designed for use in a milling cutter intended to be ganged with other like cutters on a common rotational axis for the simultaneous milling of multiple slots or grooves. The axially movable clamp for the on-edge inserts employed in the cutter is operated indirectly by an adjusting screw accessible radially from the outside of the ganged cutter bodies without requiring disassembly of the individual cutters to index or replace the cutting inserts. In each of several clamping mechanisms disclosed, the ultimate clamping element or detent takes the form of an arm which is rocked into engagement with the insert at the site of a blind depression in the face of the insert, being drawn in the axial direction by inward adjustment of a radially accessible adjusting screw, and rockable in the reverse direction by a return spring to release the insert as the adjusting screw is backed off.

Abstract: This combination tool (10) includes a body (12) attachable to a drill press (16) by means of a shaft (14). The body includes an end face (34) for attachment of an abrasive finishing disc (36) and provides a mounting for cutter inserts (40). Each cutter insert includes a horizontal cutting edge (46') and a vertical cutting edge (48'). The cutter inserts (40) are generally rectangular and are mounted to vertical abutment bearing faces (52) on the body, utilizing a single fastener (56).

Abstract: A tool for use in a groove mill to simultaneously form spaced grooves in the interior surface of a bore with the tool including a shank and a pair of heads mounted thereon in spaced relation and in a detachable, non-rotative manner. Each head includes a plurality of insert pockets and inserts secured therein by screw threaded retainers and notches in one head aligned with the screw headed retainers for the inserts in the opposite head to enable indexing of the inserts without disassembly of the heads.

Abstract: The invention relates to a milling cutter having interchangeable cutter blades which are fixed in grooves in the milling cutter body by means of clamping elements. The cutter blades have integrally formed radial and axial support mountings, by which means a simple and precise mounting of the cutter blades is achieved. The seating surfaces made at the milling cutter body are made as simple, flat surfaces.

Abstract: Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading and to enable cutting force to be directed through a large cross-sectional area of the insert.

Abstract: A boring block and tool holder is disclosed having an opening therein. The block is made of a thick rectangular plate having inserts set into its front corners and inclined surfaces adjacent its rear edge forming a noncircular tang part having two rearwardly facing shoulders adjacent the tang portion which is received in a slot in a boring bar. The shape of the slot is complimentary to the shape of the tang part of the block. A tapered hole through the tang aligns with a tapered hole in the boring bar and the tapered hole in the block receives a taper pin which forces the block rearward bringing the block into firm rigid relationship with the end of the bar thereby clamping the block in positive rigid relation to the bar. The block has more strength than previous blocks because the block is thicker below the cutting inserts and there is more metal below the cutting insert, yet it can use the same bar and same slot width as rectangular blocks.

Abstract: A rotary cutter for holding replaceable cutting inserts includes a cylindrical bore having a generally radially-disposed axis which makes an acute angle with the insert cutting face, thus forming a wedge-shaped portion in the holder between the insert-supporting face and the axis of the bore. A cylindrical locking member is received in the bore. An insert-retaining locking screw threadedly engages the locking member. The wedge-shaped portion of the holder causes increased tension in the locking screw during rotation of the cutter, which insures insert retention at high rotational speeds.

Abstract: A cutting tool comprising a holder and a removable indexable cutting insert clampingly held on the holder. The holder has a cut-out portion having a concave surface and an insert support and clamping block having a conforming convex surface corresponding to the concave surface of the holder cut-out portion movably held relatively therewith by a differential screw. The insert support and clamping block has a surface supporting the insert and a pin projecting through a mounting aperture in the insert. The cut-out portion has sidewall surfaces engaged by corresponding lateral faces of the insert when the block is driven by action on the differential screw into an insert clamping position. The block has a projecting tang or flange disposed in a corresponding groove in the surface of the cut-out portion, the tang or flange and groove combination acting as a pilot and locator for the insert support and clamping block and as a means of transmitting cutting forces applied upon the cutting insert to the holder.

Abstract: A milling cutter blade with a notched cutting edge capable of being mounted at a desired negative or positive rake in a cutter body, the notches having side walls which, at the side face, diverge away from the cutting edge. The blade edge surfaces adjacent the cutting edges are of concave, generally V-shaped configuration with the junctures of these edge surfaces with the side faces being at an acute angle. A plurality of the blades are mounted in a cutter body to form a milling cutter assembly such that one portion of the configurated concavity V on the blade back edge surface is in reference engagement with a like oriented cutter body reference surface on a convex generally V-shaped back surface of a cutter body blade slot. The V-shaped concavity on the front edge surface of the blade cooperates with the adjacent chip pocket of the cutter body to discharge chips.

Abstract: A cutting tool is disclosed, particularly a ball track milling cutter, comprising a tool holder in which a turnover cutting disc is received that includes four cutting edges of circular arc segment shape. The cutting disc is received in a slot dividing the tool holder into two clamping jaws and is adapted to be clamped in position by a clamping screw which extends diametrically and passes through the cutting disc in the area of an opening. In addition to the clamping screw a thrust piece is provided to press the cutting disc with two cutting flanks axially against abutment faces at the bottom of the slot.

Abstract: Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading and to enable cutting force to be directed through a large cross-sectional area of the insert.

Abstract: A ball nose end cutting tool having cutting bit inserts which may be quickly and accurately positioned on a tool holder and secured thereto with ease. The present construction permits the cutting bits to be mounted in a substantially end-to-end relationship for cutting to the center of the tool holder thereby reducing the cutting forces at the center. The tool holder has a pair of opposed bit-receiving pockets formed therein that are adapted to hold two identical high-speed cutting bits. Each pocket includes a dovetailed locator edge surface, a planar inner side wall, and an open outside area which permits unrestricted chip flow. The cutting bits are adapted to seat against the dovetailed locator edge surfaces and planar side walls of the two pockets in the tool holder. The planar side walls are oppositely inclined, each being at an approximately 5.degree. negative rake angle to the longitudinal axis of the tool holder, for the purpose of properly positioning the cutting edges of the bits.

Abstract: An indexable ball nose end mill is disclosed comprising an elongated tool holder having an insert clamped on one end. The insert is indexable such that when one cutting edge has become dull, the insert can be reversed end-for-end to use the cutting edge along the opposite side. The insert is clamped in its position between one end of the holder body and a cap having three protuberances. Two of the protuberances are received in a pair of generally frusto-conical recesses in the insert, and the third is received in a third opening in the body. A threaded fastener connects the cap to the body to clamp the insert in its cutting position. In another embodiment of the invention, two indexable inserts are mounted on the holder body.

Abstract: A milling cutter including a supporting body having a longitudinal axis and presenting a frontal face and a circumferential side. The supporting body is provided with a radial recess. A plurality of cutting plates are disposed along the circumferential side and arranged in rows each extending generally in the longitudinal direction of the supporting body. At least one of the cutting plates is a face cutting plate having a cutting edge for cutting at both the circumferential side and at the frontal face. The cutter includes a cassette having a quadrilateral cross section and disposed in the recess. The face cutting plate is fastened to the cassette, and at least one fastening element is provided for releasably tightening the cassette in the recess.

Abstract: The adzing bit assembly includes a circular cutting bit with a circular edge formed by the merging of its flat face and its peripheral surface at an acute angle. A cutting bit shield abuts and covers the face of the cutting bit and extends to a diameter substantially equal to the diameter of the cutting edge, so as to shield the face and the cutting edge of the cutting bit. The cutting bit is fabricated from harder material than the cutting bit shield, so that the cutting bit shield wears away during use and the circular cutting edge of the cutting bit is progressively exposed.

Abstract: A blade holding arrangement for cutter spindles or cutter heads which are adapted to be equipped with reversible blades. The arrangement including radially adjustable blade holders in the form of drawn profile sections, with the blades adapted to be pressed against guide shoulders of the cutter spindles or cutter heads. The blade holders are provided with a reinforcing elevation or projection that slopes downward in a direction of the guide shoulders. A groove, extending in parallel to the reinforcing elevation or projection, is provided in the blade holder adjacent the reinforcing elevation or projection on a radially inner side of the blade holder.

Abstract: A cutting tool in which a retention pin releasably holds an insert, or an insert and seat, in place in a recess of a cutter body. The retention pin is fabricated from a blank having a cylindrical body portion with a first axis concurrent with the axis of the cylindrical head thereof, the body portion thereafter being threaded on a second axis angularly disposed with respect to the first axis and intercepting the same at about the mid-point thereof. When the thus threaded pin is inserted into the bore, it rotates the head portion about the second axis, thereby to force the cutter insert against a supporting shoulder while drawing the insert into engagement with the seat. A retaining lip is provided on the shoulder to prevent tipping of the insert when such is forced into operating position.

Abstract: A cutting wheel comprises a thin metal disk having an inner peripheral cutting edge. The cutting wheel is photochemically machined from a flat metal sheet and has locating holes therethrough the diameters of which are held to a very close tolerance.

Abstract: A milling cutter consists of a shaft 10, a cutter plate 12 and a screw bolt 14 by means of which the cutter plate 12 is detachably fastened at the front end of the shaft 10. The latter has a recess in the front face thereof. The recess is defined by three planar side faces leaving a peripheral gap between each pair thereof. The cutter plate substantially formed triangularly is fitted in the recess for being inmovable in a radial plane. Protrusions 30 of the cutter plate protrude through the gaps and are provided with a cutting edge respectively.

Abstract: A cutting tool comprises a tool holder body having a passage, a cutting insert seat mounted on the tool holder body adjacent the passage, and a cutting insert mounted on the cutting insert seat by a clamping device for tightening the cutting insert against the cutting insert seat. The clamping device includes a two-collar screw situated in the passage and is threadedly engaged in the tool holder body. The two-collar screw has two mutually spaced collars delimiting an annular space between themselves. The clamping device further includes a guide block situated in the passage of the tool holder body and extending into the annular space. The guide block cooperates with the collars to be displaced thereby parallel to the longitudinal axis of the two-collar screw upon turning of the screw relative to the tool holder body.

Abstract: A rotatable shell cutter has a cylindrical member which advances to cut into a pipe. A plurality of cutting elements are arranged in a circle at one end of the cylinder. Each cutting assembly comprises a cartridge fixed as one piece to the cylindrical member, such as by brazing or the like, a seat positioned thereon through dowel pins, a cutting insert mounted on the seat through a cooperating V-shaped projection and recess, and a clamp engaging, positioning and securing the cutting element against the seat and also secured to the cartridge for urging all of the cutting assembly elements together.

Abstract: A tool block is provided with a cutting insert holder (12), provided with a cutting insert (14), and a clamping device comprising a pivotally arranged lever (20), one end of which acts on the cutting insert holder (12) while the other end of which cooperates with a spring loaded device (21).

Abstract: A cutting plate carrier insertable in a holder of a machine tool, in particular a lathe tool. The carrier has a plane base surface and a substantially circular plan, the axis of which coincides with the axis of a central screw thread. The cutting plate carrier is provided with a recess for a polygonal cutting plate having a central bore. The cutting plate can be fixed in the recess by means of a clamping screw which can be screwed into the central screw thread. For the cutting plate, the recess has a plane supporting surface arranged parallel to the base surface and a number of bearing surfaces corresponding to the number of lateral surfaces of the cutting plate and extending parallel thereto. These bearing surfaces are arranged at the same distance (a) from the central screw thread. A second screw thread for screwing in a retaining screw inserted into the holder from below is provided parallel to the central screw thread.

Abstract: A chipper knife (1) is fastened in a chuck (2). The knife has two supporting faces (15,14), which lie against two faces (25,24) in the chuck.The fastening of the tool can be improved if the rear supporting face (15) of the knife is provided with at least one finger (1a), which fits into a recess in the chuck (2) and whose bottom face constitutes at least a part of the bottom supporting face (14) of the knife.

Abstract: In a rotary drilling bit having preform cutting elements, a partial or total structural discontinuity is disposed between the elements and the underlying structure or within the underlying structure to reduce the bending strain upon the preform cutting elements. In this way there is a reduction in the fracture or damage of preform cutting elements.

Abstract: An improved cutting insert for rotary cutting tools is disclosed. The cutting inserts are characterized by a center bushing made of metal that is softer than the conventional sintered tungsten carbide or titanium carbide used for the cutting body of the inserts. The center bushing may be secured on each cutting insert by using braising, shrink fitting, oxidation bonding, or high energy bonding techniques. Additionally, conventional plating techniques may be used.

Abstract: A cutting tool in which a retention pin releasably holds an insert, or an insert and seat, in place in a recess of a cutter body. The retention pin is fabricated from a blank having a cylindrical body portion with a first axis concurrent with the axis of the cylindrical head thereof, the body portion thereafter being threaded on a second axis angularly disposed with respect to the first axis and intercepting the same at about the mid-point thereof. When the thus threaded pin is inserted into the bore, it rotates the head portion about the second axis, thereby to force the cutter insert against the supporting shoulders while drawing the insert into engagement with the seat.

Abstract: A face mill having individual, circumferentially spaced cutting inserts each individually adjustable by means of a wedging part.

Abstract: A rotary cutting blade assembly for removing rubber tread material from a pneumatic tire carcass prior to texturizing and finishing the tire carcass for retreading includes a cutting wheel rotatably mounted on an arbor. The cutting wheel includes a plurality of pockets adapted to receive and mount a plurality of cutting blades, which blades present an angular cutting edge which engages the tread material on the tire carcass substantially parallel to the carcass to slice and to remove the tread material from the carcass.

Abstract: A combined boring and milling tool has at least three triangularly shaped turnable cutter blades. The effective cutting edge of the first turnable cutter blade extends as bit (or drilling cutting edge) from the periphery of the shank at least to its axis. A second turnable cutter blade is offset 180.degree. peripherally from the first and its effective cutting edge extends as cutting edge on the periphery of the shank parallel to the shank axis. A third turnable cutter blade is offset axially from the first so that its effective cutting edge extends as a cutting edge parallel to the shank axis. The two effective cutting edges of the second and third turnable cutter blades lie on the same flight circle and their working ranges overlap axially. The first and third turnable cutter blades have a common chip space.

Abstract: A cutting tool assembly for the surface treatment of round timber including an arm having at one end thereof a recess portion at least a portion of which is shaped substantially as a partial regular pyramid, a cutting tool shaped substantially as a regular pyramidal funnel adapted for engagement with and disposed in the recess and fastening means for removably securing the cutting tool in the recess.

Abstract: A cutter blade for use in cutting metal is formed with a recess spaced behind the cutting edge on the cutting face to save expensive cutting material, to reduce the time and energy required to sharpen the cutter blade, and to lengthen the life of the sharpening tool. High density sintered powdered tool steel lends itself well to this construction, as do cast and forged tool steels.

Abstract: The cutter head of a rotary cutting head is formed with three pairs of recesses separated by a wall portion of the head. An abutment member is received in one recess of each pair, and a tool bit in the other recess in such a manner that a cutting edge of the bit projects from the cutter head. A threaded fastener engages the bit and the abutment member and clamps the bit to the wall portion, thereby releasably fastening the bit to the head.

Abstract: A debarker toe assembly includes a holder adapted for mounting to the end of a debarking arm and a demountable toe including a debarking edge. The holder and toe include interengaging surfaces for centering and holding the pieces in precise alignment during assembly of the toe to the holder and during use in which the assembly encounters high impact forces.

Abstract: A toolholder is disclosed consisting of a body having a recess extending inwardly from the periphery. The recess is formed having an inwardly extending front and back wall, defining a bottom wall therebetween. A shim is disposed in the recess with the back side abutting the back wall of the recess and being supported thereby, the shim having a protuberance on its front side for engaging a center hole of an insert. A pin member is imbedded in the bottom wall of a recess and located adjacent to, or in the region of, the front wall and means is provided for clamping the insert between the shim and bottom wall of the recess and the pin.

Abstract: A holder or nest for pin-type replaceable cutting inserts having a circular aperture centrally disposed therein, includes a pin extending perpendicularly to the face of the holder, the pin being cylindrical and being formed with a pair of discrete opposed axially-extending portions, each of the portions comprising a segment of a circular cylinder having a periphery less than 180.degree.. The radius of each of the portions is selected equal to the radius of the aperture in the cutting inserts. The portions meet in a plane normal to the face of the tool holder and disposed perpendicularly to the axis of the clamping screw which is threadedly receivable in the body of the holder.

Abstract: An on-edge, double positive rake, indexable cutting insert in which a short cutting edge is formed along one side of one face surface of the insert while a longer cutting edge is formed along an angularly related side of the other face surface of the insert. Inserts of this type are particularly well suited for use as the outer inserts in an end mill having helical slots for receiving the inserts. When so used, two inserts are placed in side-by-side relation in one slot with their short cutting edges located in active cutting position while one insert is positioned in an adjacent slot with its long cutting edge located in active cutting position and axially overlapping the gap between the two short cutting edges. With this arrangement, material which is left uncut between adjacent inserts in one slot is cut away by the overlapping insert in the adjacent slot. Each insert includes edge surfaces defining clearance faces for the two cutting edges and enabling each cutting edge to make a right angle cut.

Abstract: A chipping device including a disc-like member having a front face and the opposite face connected at its central region to a rotating shaft, said front face being provided with a spiral working surface which consists of main and auxiliary oblique surface portions extending along a spiral path from the central region of said disc-like member to the peripheral edge thereof, and being inclined relative to a plane perpendicular to the rotational axis of the disc-like member with an angle included between said main and auxiliary surface portions, said working surface having a plurality of cutting blades spaced from one another therealong, each of said cutting blades having main and auxiliary cutting edges substantially parallel to said main and auxiliary oblique surface portions, respectively.

Abstract: A knife for a log profile cutting head assembly is detachably secured to a base including a chip directing gullett which in turn is secured to a standard cutting disc. The removable knife is shaped to include a mounting surface oriented to maximize resistance of the knife to forces encountered and includes rectilinear cutting edges which can be sharpened on conventional grinders. A grinding guide integral with the knife and positioned between one cutting surface and the mounting surface overlaps the interface of the knife and base to prevent chip jamming.

Abstract: A device for cutting, chipping and scraping compacted earth is disclosed. The apparatus is affixed to a prime mover for rotary engagement with the earth, whereby the compacted earth is selectively loosened and/or moved. The blade design disclosed is particularly useful for close accurate work around concrete forms and the like. Other embodiments are disclosed for large area grading.

Abstract: An indexable insert milling cutter having multiple round inserts located in staggered individual isolated pockets formed in the annular periphery of the cutter body. Each insert is trapped in its pocket with only a small fraction of the cutting edge projecting beyond the periphery of the body. A chip clearance wall extends outwardly from the cutting face of the insert to the periphery of the body.

Abstract: A cutting insert is disposed in a pocket formed in a cutter body and having a side wall and an angularly related bottom wall. A first wedge engages one face of the insert and includes a pin which extends into a hole in the insert. A second wedge engages the first wedge and, when the second wedge is shifted inwardly, the first wedge clamps a face of the insert against the side wall of the pocket while the pin clamps the inner edge portion of the insert against the bottom wall of the pocket.