Abstract: A throwaway insert and a cutting tool enable a high speed cutting operation for a metallic material having great ductility such as aluminum and obtaining a vertical wall with a high quality machined surface while improving chip control. The throwaway insert comprises a major cutting edge including a tapered cutting edge connected to a cutting edge of a nose portion, and a curved cutting edge connected to an end of the tapered cutting edge at a connection point. The curved cutting edge is formed so as to extend along an imaginary cylindrical surface whose center axis coincides with the axis of rotation of a tool main body, and tapered cutting edge is formed so as to gradually curve from the imaginary cylindrical surface toward the inside of the imaginary cylindrical surface as the distance from the curved cutting edge increases, and the distance from the nose portion decreases.

Abstract: An end mill including a cylindrical body having (a) flutes each formed in the cylindrical body and each extending from an axially distal end of the cylindrical body toward an axially proximal end of the cylindrical body, (b) peripheral cutting edges each provided by one of widthwise opposite edges of a corresponding one of the flutes, and (c) end cutting edges each located at the axially distal end of the cylindrical body and contiguous to a corresponding one of the peripheral cutting edges. The end cutting edges include first and second end cutting edges, while the peripheral cutting edges include first and second peripheral cutting edges which are contiguous to the first and second end cutting edges, respectively. A first axial rake angle of the first end cutting edge is smaller than a second axial rake angle of the second end cutting edge, while a first radial rake angle of the first peripheral cutting edge is larger than a second radial rake angle of the second peripheral cutting edge.

Abstract: A rotary cutting tool that includes an elongated tool body, rotatable along a longitudinal axis of rotation is disclosed. It has a fluted cutting end on one end and a shank end on the opposite end of the tool body. The fluted cutting end includes a nose, a periphery and an end surface that extends from the nose to the periphery. A plurality of axial flutes extends from the end surface to the fluted cutting end and combines with a plurality of cutting edges. The cutting edges are unequally spaced along the circumference of the end surface lying in a plane perpendicular to the longitudinal axis of rotation. In addition, all cutting edges are of a different helix from one another and the cutting edge geometries vary from one another to create a different sound pattern. This reduces resonant harmonic vibrations.

Abstract: A milling tool includes a milling body and a plurality of cutting inserts. The milling body has fastening devices to hold the cutting inserts in a plurality of respective insert pockets each having at least one base surface. Each of the cutting inserts has at least one cutting edge. The tool has a rotational axis and a rotational direction, as well as a feed direction and an end surface. The milling tool is provided to cut a work piece substantially in an axial direction of the tool, which is substantially perpendicular to the feed direction.

Abstract: A cemented carbide ball end mill comprises a cutting portion with a semi-spherical ball portion at a tip thereof. The cutting edge portion has a cutting edge rake face and a chip evacuating flute at the ball portion. An angle formed by a straight line connecting a vertex of the ball portion, where an intersection line passes through, and another end of the intersection line with respect to the central axis, is from 30° to 50°. Further, and angle formed by the rake face and the chip evacuating flute is from 100° to 150°, and a width of the chip evacuating flute is 0.5 to 5 times as large as a radius of the ball portion.

Abstract: A rotatable cutting tool for chip-removing machining includes a basic body which defines a center axis of rotation. Cutting inserts are detachably mounted in respective cutting seats that are formed in the basic body. Each insert has a square shape and includes first and second pairs of mutually parallel major cutting edges, four corners, and four wiper edges. Each wiper edge is situated between a major cutting edge and a respective corner. The wiper edges are shorter than the major cutting edges and are inclined relative thereto, wherein an imaginary extension line of the wiper edge forms a first acute angle with the respective major cutting edge as the insert is viewed in a direction perpendicular to the top surface. The cutting seats are arranged to orient the inserts wherein an axially forwardmost wiper edge of each insert lies in a plane oriented perpendicular to the axis, and wherein a radially outermost wiper edge of each insert is oriented parallel to the axis.

Abstract: A milling cutter has a cutter body having insert pockets, with cutting inserts seated in the insert pockets. Each insert pocket has adjacent side and rear walls generally transverse to a base, the side wall being provided with two spaced apart generally flat and non-coplanar side support surfaces. Each cutting insert has a pair of opposing major side surfaces including two spaced apart generally flat and non-coplanar abutment surfaces. Upper edges of the side support surfaces abut the abutment surfaces.

Abstract: The present invention provides a canter chipper head that comprises a rotor suitable for rotation about a rotation axis. The rotor has a lateral side and a frontal side, and includes a first cutting assembly and a second cutting assembly that are each mounted to the rotor. During rotation, the first cutting assembly defines a first lateral cutting surface around the rotation axis, and a first frontal cutting surface that is generally transverse to the rotation axis. The first lateral cutting surface and the first frontal cutting surface perform a primary cut in a log. The second cutting assembly defines a second lateral cutting surface around the rotation axis, and a second frontal cutting surface that is generally transverse to the rotation axis. The second lateral cutting surface and the second frontal cutting surface perform a secondary cut in the log that is deeper than the primary cut.

Abstract: For producing forked roots of turbine blades, the turbine blades are, in a first step, roughed-in and smoothed (finished) on their outer faces in a single operation with two rigidly coupled disk milling cutters that are provided hard metal cutter inserts. In a second step, the forked root is formed with fingers by a set of rigidly coupled disk milling cutters that are provided with hard metal cutter inserts. The disk milling cutters form slots in the forked root. All of the slots are simultaneously opened (roughed-in) and smoothed (finished), the slots having parallel walls.

Abstract: The cutting tool insert 1 is in a substantially plate form and of polygonal shape and is provided with a major cutting edge 16A (or 16B) extending from one corner 14A (or 14B) toward the other corner 15A (or 15B). The major cutting edge 16A (or 16B) comprises a first edge line and a second edge line that meet to form an obtuse angle, which causes the area where the first and second edge lines meet to protrude slightly outwards, as viewed from above. The first edge line slopes down towards the second edge line so that the distance with a seat face 11 decreases gradually as viewed from the side, and the first edge line forms an obtuse angle with the second edge line causing the top face area to dip down towards the seat face. The first edge line is shorter than the second edge line.

Abstract: Cutter plates (19) with an approximately cube-shaped base body have been created, in particular for finish-milling of a crankshaft (5). At the edge of its cover surface, the base body is provided with a hump or protrusion, which can be embodied rib- or strip-shaped, has a cutting edge each on its front and back and adjoins the neighboring lateral surface. This cutting edge is a component of the main cutting edge (33) adjoining the cover surface. A corresponding protrusion (29) is provided on the lower end of the lateral surface (27) and adjoins the end of the cover surface (22) remote from the protrusion (28). In this case the lateral surface (27) is preferably inclined in such a way that it terminates flush with the protrusion (29) without forming a concave surface area with it.

Abstract: A hollow mill tool comprising a shank portion and a plurality of radially spaced and axially extending tool posts integrally formed with and projecting from the shank portion. Each tool post has a longitudinal cutting insert mounting face and each mounting face defines a first plurality of axially extending serrations. A cutting insert is mounted on each mounting face and each insert has a second plurality of axially extending serrations defining a back face and intermeshing with the first plurality of serrations. A threaded fastener extends through a front face of each cutting insert and is received in each of the tool posts to securely hold each cutting insert against its tool post.

Abstract: A grinding wheel and a method for grinding bar blade for the production of spiral gear teeth are described. For economical grinding of such bar blades the grinding wheel has a conical grinding surface (Pp) widening from a small diameter (d1) to a large diameter (d2), a cylindrical grinding surface (Ps) adjoining the conical grinding surface (Pp), and a toroidal grinding surface (G) adjoining the cylindrical grinding surface (Ps). The grinding wheel embodied in this manner enables profile grinding (rough grinding) and subsequent generating grinding (finish grinding) of the surfaces of the bar blade without the necessity of remounting the blade. For practical purposes the grinding wheel rotates about a stationary axis (S), and the bar blade to be ground is guided along the grinding wheel at appropriately set angles.

Abstract: An improved end mill and method of producing are presented wherein the end mill has a neck with a neck diameter, a cutting end with a cutting end diameter, a flute formed within the cutting end, and a cutting edge formed along an outer border of the flute an the improvement includes a highly or mirorr polished cutting edge land extending from and along the cutting edge. Additionally, included are a primary angle land continuing from the mirror polished cutting edge land and extending into the flute, a secondary angle land adjoining the primary angle land and terminating within the flute, and, if desired, a smoothed transition region between the cutting end diameter and the neck diameter.

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: The invention relates to a method for milling fishbone-type notches (3) which are arranged on the perimeter of a turbine shaft (2) and which are used to receive blade footings. A step-tapered preform (15) of the cross-section (3) of the notch is pre-milled in preferably three machining steps. On the basis of this preform (15), at least the substantial part of the fishbone-type cross-section form which is characterised by undercuts in the step flanks is milled in one tool passage by means of a profile milling cutter (21).

Abstract: A milling tool includes a milling body and a plurality of cutting inserts. The milling body has fastening devices to hold the cutting inserts in a plurality of respective insert pockets each having at least one base surface. Each of the cutting inserts has at least one cutting edge. The tool has a rotational axis and a rotational direction, as well as a feed direction and an end surface. The milling tool is provided to cut a work piece substantially in an axial direction of the tool, which is substantially perpendicular to the feed direction.

Abstract: The present invention is for providing a milling cutter which can provide for both an improvement in sharpness and a retention of cutting edge strength, while making the transverse cross-section an easily manufactured polygon shape. The milling cutter with a plurality of peripheral cutting edges (12) has a polygon shape transverse cross-section. The polygon is a convex polygon with one more apex point (13) existing between apex point pairs constituting the peripheral cutting edges with an apex angle greater than that of the apex points, and a longer side of the sides on either side of each of the peripheral cutting edges constitutes a rake face (14), while a shorter side constitutes a relief face (16).

Abstract: An indexable type rotary cutting tool (1) has at least one indexable inserts (3, 6). The indexable insert (3, 6) has a main cutting edge (7) and an outer peripheral cutting edge (9). The main cutting edge (7) ranges from 3 to 35 degrees in cutting edge angle, and the main cutting edge (7) is shaped like and arc or a substantially arc, and the outer peripheral cutting edge (8) is shaped like a straight line, an arc, or a substantially arc so as to be back-tapered with respect to a center axis of the tool.

Abstract: A solid end mill is provided which can prolong the useful life of the tool, without any adhesion to the work material, even aluminum or similar material, during a or cutting or drilling operation. The solid end mill includes a chip discharge flute, which is formed in the outer periphery of a nearly cylindrical tool main body. The nearly cylindrical tool main body rotates around a central longitudinal axis. A cutting edge is formed at a ridge portion on the outer periphery of the tool main body. The cutting edge is adjacent to a wall surface constituting a rake face of the chip discharge flute. The rake face faces in the tool rotational direction. A convex portion may be formed so as to be adjacent to and raised from a concavely curved portion. The concavely curved portion stretches to the cutting edge and is formed between the flute bottom of the chip discharge flute and the cutting edge.

Abstract: The present invention is for providing a milling cutter which can provide for both an improvement in sharpness and a retention of cutting edge strength, while making the transverse cross-section an easily manufactured polygon shape. The milling cutter with a plurality of peripheral cutting edges (12) has a polygon shape transverse cross-section. The polygon is a convex polygon with one more apex point (13) existing between apex point pairs constituting the peripheral cutting edges with an apex angle greater than that of the apex points, and a longer side of the sides on either side of each of the peripheral cutting edges constitutes a rake face (14), while a shorter side constitutes a relief face (16).

Abstract: A milling tool having replaceable straight elongated inserts that provide a helical cutting action. The tool has grooves formed at an angle with the longitudinal axis of the tool, the grooves have flat surfaces. Wedge means secure the respective inserts in respective grooves of the tool. The wedge means each have a plurality of apertures on the surface bearing against the insert, and coolant fluid under pressure is provided through said apertures to exit adjacent the cutting edge of said insert and against the work surface.

Abstract: A face-milling tool includes a milling body forming seats arranged around an axis of rotation of the body. The seats carry identical inserts, each insert being of tetragonal or pentagonal, or hexagonal shape. Each insert includes first and second side faces. Each side face includes a pair of minor cutting edges at each corner of the insert. Two major cutting edges intersect respective ones of the minor cutting edges whereby each major cutting edge and its associated minor cutting edge together form a cooperating pair of cutting edges. There are two of those cooperating pairs at each corner of each side face, whereby there are at least sixteen cooperating pairs on the insert. The minor cutting edges, which function to generate a surface on a workpiece, are sharper than the major cutting edges. During a milling operation the insert is oriented so that only one cutting corner engages a workpiece, and only one of the cooperating pairs of cutting edges of that cutting corner is active.

Abstract: A formed rotary cutting tool including; a generally cylindrical body portion having (a) a plurality of flutes which are formed in the body portion to generally axially extend and which are located around the axis so as to be angularly spaced apart from each other, and (b) cutting edges which cooperate with each other to have a diameter that changes in the axial direction, so that the body portion has a desired configuration. The tool is rotated about the axis to form a groove whose configuration corresponds to the desired configuration, in a solid workpiece. Each of the cutting edges is defined by an intersection of a rake face and a flank face which has a predetermined clearance angle that is constant in the axial direction, irrespective of the change of the diameter.

Abstract: A cutting tool having a body that is cylindrical in shape having a shank at one end and a cutting end opposite thereof. The cutting end has an even number of flutes thereon with every other flute being a cutting flute, such as a knuckle flute including a radial knuckle flute and a flat crested knuckle flute, or a diamond cut flute that cuts material. Every other flute therebetween the cutting flutes are wiper flutes that wipe or clean the cut material. The wiper flutes have a larger diameter than the cutting flutes thereby enabling the wiper flutes to remove any unnecessary debris and finish the material in a single step.

Abstract: A drilling template for carving into the lateral edge or the jamb of a door, a slot shaped and dimensioned to receive either a lock and its mounting plate or its strikeplate has a series of drill bit bores at regular spaced-apart intervals along a central line, a pair of lateral legs, and mounting holes corresponding to those of the lock or strikeplate. A drill is used to rout the lock blade slot through the drill bit bores. Guides in either side of the bores prevent lateral movement of the bit, but allow slight longitudinal swing to remove material that may remain between holes. The height of the guides may be varied along the length of the template to guide the routing for a slot of more uniform depth. Lateral spacers are provided to align the template against the angled part of the door jamb. A specialized routing drill bit is provided for drilling the strikeplate or lock channel. The bit has central pilot shaft for tracking within the lock blade slot and a removable circular toothed disk.

Abstract: A routing cutter has a tool body carrying replaceable cutting inserts which include side inserts with cutting edges projecting radially from the periphery of the body and end inserts with cutting edges projecting forwards from the body. The cutting edges of the side inserts have inward extensions to define a cutting envelope that intersects or overlaps the cutting envelope of the end inserts. Each side insert is secured by clamping screws extending substantially radially into the tool body, rearwards of the insert cutting edge. This arrangement of the clamping screws allows the body to be formed with relatively shallow seating recesses for the side inserts with substantially tangential locating faces against which the inserts are clamped for precise radial location. Also, the side inserts can be relatively deep in the direction of rotation to improve support for cutting edge regions that project from the tool body.

Abstract: To form undercut grooves in a work piece, especially to retain turbine rotor blades, in a first step, the grooves are cut such that the flanks of the grooves have a preliminarily desired shape; then, in a second step, a bell-type countersink is moved radially to cut the desired shape of the flanks of the groove. Countersink cutters for the second step include a plurality of groups of cutting bits or inserts secured to posts on a shell, or bell-type countersink, in accordance with the profile to be cut.

Abstract: A cutting tool including a toolholder for releasably receiving a plurality of quadrilateral cutting inserts in which adjacent cutting inserts are partially nested for their greater compaction and whereby their operative cutting edges overlap so as to present an effectively continuous cutting edge. The cutting inserts each having upper and lower surfaces, a side surface associated with a cutting edge and a pair of opposite side surfaces directed transversely thereto, the insert having an upper and base insert edges defined by the respective intersections of the upper and lower surfaces and a first of the opposite side surfaces, at least one of the surfaces associated with the insert base edge having a recessed portion of varying depth relative to the upper insert edge along imaginary lines parallel to the major cutting edge in a bottom view of the cutting insert, the depth being maximal remote from the major cutting edge.

Abstract: A rotary cutter includes an elongate body portion, a shank provided at one end of the body portion; a cutting head provided at the other end of the body portion, the head being fluted in one direction only by at least one flute of relatively short length provided in the cutting head, the flute having same-hand cutting and fluting directions; a relief providing transition surface located at a trailing end, relative to the shank, of a cutting portion of the at least one flute; a first gash face extending inwardly from a terminal end of a leading part of the at least one flute; and the first gash face being extended by a contiguous, secondary gash face on a rear face of the at least one flute.

Abstract: A disposable tip for a milling cutter. The disposable tip has a top surface, a side surface and a cutting surface. The cutting surface has a cutting edge formed at the intersection of the cutting surface and the side surface. The cutting edge is oriented substantially parallel to the longitudinal direction defined by the top surface. A plurality of flutes are formed on the cutting edge. The cutting surface and the top surface define a rake angle between 2.degree. and 30.degree..

Abstract: The present invention pertains to a long cutting length milling cutter with inserts with hole with cutting edge inserts which are arranged on various levels in the axial direction from a front end of the said milling cutter body. The inserts of the various levels are arranged according to steps, whose mean height, excluding the thickness of the insert belonging to the step or seat, is not less than the thickness of the insert. The radial angle .delta., which is formed by the radius of the milling cutter body passing through the vertex of the cutting edge of an insert with the straight line parallel to the base of the insert and passing through the vertex of the insert, has an amplitude not less than 10.degree..

Abstract: A machine for simultaneously milling and grinding a workpiece comprises milling and grinding wheels rotatable about respective first and second parallel axes, the second axis being offset radially with respect to the first axis. A single motor drives the milling and grinding wheels at different relative speeds. The grinding wheel is mounted to a hub which includes an axially flexible portion to enable the grinding surface to be axially adjusted. The milling wheel includes an array of milling cutters with a large gap formed between leading and trailing ones of the milling cutters to accommodate the offset grinding wheel. The radial spacing of the milling cutters from the axis of rotation of the milling wheel progressively increases from the leading milling cutter to the trailing milling cutter.

Abstract: An improved cutting tool having a cutting insert mounting member and a star shaped cutter insert holding member of similar diameter: the two members when interfitted, secure a plurality of cutting inserts about the outer circumference of the assembled tool. Secure clamping of the cutters is achieved through both axial and radial clamping forces generated by the action of the holding member. Additional radial and axial clamping forces are exerted on the cutting inserts by centripetal acceleration acting on the members during operation. Depth limiters devices that mount in the tool act as skids on the work surface to control the aggressiveness of the cut. An isolation mechanism may be included to eliminate oscillations transmitted by the hand held power unit to the cutting tool.

Abstract: A double claw stump cutting tooth having two cutting heads having cutting faces angled to slice into a stump with both heads adapted for simultaneously cutting or chipping a stump.

Abstract: A cutting tool having a cutting plate with at least one blade and a central axial hole through which a head screw can be used to connect the cutting plate to a holder having an axial bore through its center for receiving the screw and a recess around the bore for receiving a complimentary projection located around the central hole of the cutting plate which is longer than the recess is deep. Alternate embodiments are provided in which the projection is located on the holder and the recess in the face of the cutting plate. In all embodiments, the recess and projection have contacting surfaces which substantially eliminate axial forces on the head screw.

Abstract: A milling cutter for cutting a workpiece in both right and left-handed rotary directions is provided that comprises a rotatable cutter body having at least one pair of right and left-handed insert seats disposed on its periphery, an indexable wedge for each pair of right and left-handed insert seats, and a mounting screw for each of the wedges for securing the wedges in a clamping position with respect to a right or left-handed insert seat. Each of the wedges may be used to secure an insert in the right or left-handed seat of its respective seat pair by loosening or removing the mounting screw, and turning the wedge 180.degree.. Each wedge includes a front end for wedgingly engaging an insert in either the right or left-handed seat, and a back end for wedgingly engaging an opposite surface of the unused insert seat in order to more securely clamp the insert in place.

Abstract: A rasp hub assembly for use in a tire buffing machine is disclosed. The hub assembly includes two end plates, and a set of tire rasp blades and spacers arranged in alternating circumferential rows. The blades and spacers have conforming nonplanar elongated bodies, with the blades nested with adjacent spacers. The resulting rasp hub assembly allows the use of an even or odd number of rasp blades in each row, and provides various benefits further described in the specification.

Abstract: A method for machining a rotation-symmetrical workpiece surface includes the steps of rotating the workpiece during machining, roughing the workpiece surface, smoothing in a longitudinal turning process the workpiece surface with a cutting tool having a cutting blade with a divided edge arrangement, advancing the cutting tool in a radial direction relative to the workpiece surface in the smoothing step, and moving the cutting tool in the axial direction of the workpiece surface for carrying out the longitudinal turning process. The cutting tool for carrying out the aforementioned method comprises at least one first cutting blade for the smoothing step, the first cutting blade having at least two adjacent edges axially spaced at a distance from one another.

Abstract: A disposable cutter which has a plurality of cutting edges. The cutter has perforations adjoining the cutting edges. The cutter defines an axis of rotation. The cutter is joined to a transparent bowl. The bowl is concentric with the axis of rotation. The bowl has a bottom tool driver opening concentric with the axis of rotation.

Abstract: A tool having a shaft with a longitudinal axis and opposite ends. A boss is positioned at one of the ends. A tool collet is positioned at the other of the ends. A bore is in the boss end. The boss has a pair of pins that extend from opposite sides of the bore. A cutting lid with cutting edges on its top and a pair of bores passing therethrough. The cutting lid can be positioned on the pins and locked onto the boss, whereby upon rotation of the tool driver, the cutting lid is securely held in operable position on the tool driver throughout the operation and may be easily removed when desired.

Abstract: A cutting tool which can be used for milling metals, metal alloys and for woodworking. The cutting tool includes a shaft which is attachable to means of rotation and a head portion provided with multiple cutting edges. The cutting tool is capable of cutting in any direction and allows for cutting at increased speeds.

Abstract: A disposable cutter has a cutter body formed with chip pockets and a plurality of disposable inserts having cutting edges. Each pocket is formed at least at the front or inner side of the body with a spherical blind groove portion. The center of radius of curvature of the spherical blind groove portion is located on an imaginary line drawn from the front end of each cutting edge toward the pocket at a substantially right angle with respect to each cutting edge.

Abstract: A router bit for providing smooth finish cuts in soft metal, such as aluminum, includes a plurality of helical cutting edges that are disposed at a helix angle of 45 degrees. The cutting edges each include a cutting face having a positive rake angle of approximately 18 degrees, and a land portion having a primary relief angle of approximately 14 degrees, and a secondary relief angle of approximately 20 degrees. The bit shank is preferably 3/8 inch in diameter to increase rigidity. The combination of these specific angles and the shank diameter provides a cutting bit that can cut soft aluminum with a resultant finish that meets or exceeds aircraft industry standards.

Abstract: A milling cutter has replaceable cutting inserts mounted on a toothed disc or drum body. Seatings for the inserts on the teeth locate them at spaced intervals on the periphery of each tooth. The inserts of at least one tooth of the body are peripherally staggered in their seatings relative to the inserts on at least one other tooth such that the staggered and spaced inserts on the teeth have paths of rotation that intersect to define a continuous profiled cutting line. The inserts have their cutting edges ground in situ on the teeth to define the profile of the cutting line. By this method a finish quality profiled surface can be produced using cutting inserts that are initially of standard form.

Abstract: An acetabular reamer cup having a cutting bowl having a plurality of singly curved cutting edges. The cutting bowl has a plurality of slots proceeding the cutting edges. The cutting bowl defines an axis of rotation. A bottom is joined to the cutting bowl. The bottom has a tool driver opening concentric with the axis of rotation.

Abstract: A disposable acetabular reamer cup which has a cutting bowl haing a plurality of cutting edges. The cutting bowl has perforations adjoining the cutting edges. The cutting bowl defines an axis of rotation. The cutting bowl has a bottom opening. A polymeric plug is joined to the cutting bowl. The plug is concentric with the axis of rotation. The plug occupies the bottom opening. The plug has a tool driver opening concentric with the axis of rotation.

Abstract: A helical cutting tool having a plurality of cutting inserts of quadrilateral configuration removably attached to seats formed in the cutting tool, with each insert including a cutting edge extending in the axial direction bounded on opposite sides by a pair of parallel, radially-extending edges. The cutting inserts are disposed in a helical array in which the cutting edge of each insert is spaced in the circumferential direction from the seat of the next adjacent insert and is in overlapping relationship in the axial direction with the cutting edge of the next adjacent insert, and in which the radially-extending edges of each insert are in overlapping relation with the radially-extending edges of the adjacent inserts, such that the cutting edges of all the inserts define a continuous, non-interrupted, cutting line of stepped configuration.

Abstract: A tire rasp blade has a planar body portion and a working edge portion. The working edge comprises a combination of adjacent, or closely aligned teeth and spaced teeth. The trailing edges of any one adjacent tooth is displaced from the plane of the body portion to one side of the blade and the leading edge of the next following adjacent tooth is displaced to the opposite side of the blade.

Abstract: A thread cutter milling tool that includes a cutter body having two sets of cutter teeth. The cutter body is reversibly mountable on a holder so that either set of teeth is presented to the work. Each set of teeth is formed in an edge of the cutter body that is recessed to form a cutter surface and a chip breaker surface. Each chip breaker surface has a dual action for breaking chips and also for locating the cutter body on the holder.