Abstract: A cutting tool and method for cutting multidirectional cuts in a workpiece. The cutting tool has a body portion having a generally cylindrical outer wall and inner periphery. A plurality of cutting teeth are spaced circumferentially around the lower end and a plurality of flutes extend upwardly around the outer periphery from the lower end. The cutting teeth include a plurality of generally radially extending cutting edges positioned about the face of the cutting tool, a plurality of inside diameter cutting edges formed at the line of intersection of the radially extending cutting edges and the inner periphery of the cylindrical wall, and a plurality of outside diameter cutting edges formed at the line of intersection of the radially extending cutting edges and the outer periphery of the cylindrical wall.

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 cutting tool for machining printed circuit boards and the like includes a cutting part having an longitudinal axis of rotation, an outer surface, and a plurality of staggered teeth formed on the outer surface. The cutting part has a first predetermined number of main cutting grooves formed in the outer surface and which extend along the cutting part at a first lead angle, as well as a second predetermined number of divider grooves intersecting the main cutting grooves. The divider grooves extend along the cutting part at a second lead angle. The main cutting grooves and the divider grooves define teeth. The first predetermined number is a prime number and the second predetermined number is greater than the first predetermined number by two, such that the teeth are staggered as viewed in a radial direction which is perpendicular to the longitudinal axis and such that each of the teeth partially overlaps in the radial direction at least another one of the teeth.

Abstract: A cutter body (22, 22') has a slot (26, 26') opening onto its nominal outer cylindrical surface (24) and extending along a plane that intersects the cutter axis (X) at an acute axial rake angle (A). A flat cutter blade insert (40) with an elliptical polycrystalline diamond cutting edge (48) is secured in the slot (26, 26'). The insert (40) is positioned to produce a non-negative radial rake at each point along the cutting edge (48). Preferably, the cutter (20, 20') has a plurality of circumferentially spaced slots (26, 26') and inserts (40). The slots (26') may be arranged in a herringbone pattern to resist delamination of a workpiece. Preferably, the cutter relief angle varies along the insert (40) from a minimum at the leading end (50) to a value at the trailing end (52) equal to the minimum plus the angle between the radial lines of the cylinder (24) through the leading and trailing ends (50, 52), respectively.

Abstract: A rotary cutter bar for a tree felling apparatus. The bar comprises a cylindrical rod having a plurality of raised cutting teeth on its surface. Each tooth is in the form of a short curved bar. The teeth are located on a plurality of equally spaced-apart, spiral paths extending about the cylindrical surface of the rod from one end to the other. The spiral paths extend at an angle of between 30.degree. and 60.degree. to the longitudinal axis of the rod.

Abstract: A milling cutter tool for cleanly and smoothly cutting honeycomb core material is disclosed. The cutter tool includes a circular saw blade sharpened to a knife edge. A bevel extends from the upper surface towards the sharp peripheral edge. A plurality of cutter bodies extend vertically above the circular saw blade. The cutter bodies include a plurality of teeth generally parallel to each other and extending vertically with respect to each other. The teeth include a piercing point and sharp cutting edges extending at a clearance angle from the piercing point. A flat surface extends between the teeth. The circular saw blade having a sharp bevel cutting edge provides a clean cut of the honeycomb core material at the surface to be cut. The sharp points of the cutting edges pierce the honeycomb material, dig into it and slice it. The cutting edges further slice and cut the dross honeycomb core material as it is separated from the surface being cut. A clean, smooth surface is left to which a panel may be bonded.

Abstract: An insert rotary cutting tool includes a tool body of a generally circular cross-section having an axis of rotation therethrough and having an outer periphery. The cutting tool has plural groups of cutting inserts releasably mounted on the outer periphery of the body with the groups being spaced circumferentially of the body from each other. The inserts of each group are displaced circumferentially of the body and spaced axially of the body. Each of the inserts has a plurality of main cutting edges and is disposed in such a manner that one of the main cutting edges is indexed in a peripheral cutting position to serve as a peripheral cutting edge. The indexed peripheral cutting edges of the inserts are in series axially of the body as viewed circumferentially of the body. The indexed peripheral cutting edges of the inserts of each group have foremost ends disposed on a common helical line extending helically axially of the body.

Abstract: An end milling tool having a positive axial rake angle in side elevation to facilitate removal of chips from the surface of a workpiece and a curved cutting edge having a neutral (zero) to positive rake angle in bottom plan view as it progressively cuts to enhance chip removal while precluding welding at the work area and enabling the use of a low cutting force. The tool cutting area is formed by a rhomboid-shaped indexable cutting insert at one end having an angular axial rake with a unique curved surface in side elevation provided with a lead corner and a strong included angle in an end elevational view. Other inserts are mounted on the tool above the rhomboid insert to form the remainder of the cutting area and are circular in side elevational view. Each of the rhomboid and circular inserts are mounted in an insert seat having at least one pair of flat side surfaces in abutting relationship with compatible surfaces in the pocket to obtain maximum rigidity in seating and prevent rotation of the insert.

Abstract: A spiral four fluted rotary carbide cutter has a one directional helix throughout much of its length, and a reverse directional helix adjacent the cutting end. Opposite lands, between the flutes, have square cornered axially aligned and equally spaced notches; with adjacent lands having the notches intermediately located with respect to each other. All of the notches are at an angle of about 20 degrees with respect to a line perpendicular to the axis of the cutter to in combination provide a cutter for Kevlar containing composite panels.

Abstract: Shown and described is an on-edge cutting insert for milling cutters in the form of a flat six-sided block having two parallel major faces which are seating and clearance faces, and two opposed edge surfaces which are rake faces which intersect at least one major face of the flat block to form two parallel cutting edges therewith, and two other opposed edge surfaces which are recessed centrally of their major dimension to form sideward projections of the cutting edges at the corners of the major faces.The recesses accommodate the sideward projections of the cutting edges of the adjacent inserts in an interfitting array of inserts along a single chip gullet in which the several inserts sweep contiguous concentric segments of a more extensive uninterrupted cutting path.

Abstract: A roughing cutter (14) has a generally cylindrical shank (16) with a plurality of lands (22) and angular flutes (20) with resharpening lips (32) separating the lands. A plurality of straight-crested cutting teeth (24) are formed on the lands with radial relief. Each tooth has a stright cutting edge (28) generally perpendicular to the radial direction. The orientation of the cutting edge permits it to be in parallel relationship to a surface of a workpiece while in cutting engagement. Each tooth has S-shaped side walls (34, 36) with rounded upper portions which are respectively tangential to the crest of the tooth. The rounded upper portions result in reduced power consumption during machining. The teeth of the roughing cutter may be formed by an axially advancing milling cutter with a sloping cutting edge segment (58) and adjoining rounded segments (60, 62).

Abstract: This miling tool for underground work consists of a tool body which has a plurality of cutter blades. Each cutter blade has a negative axial rake and an essentially constant negative radial rake. In addition, each cutter arm has a close packing of cylindrical cutting grade tungsten carbide inserts set at a lead angle of about 0 to 10 degrees. The inserts are also preferably vertically offset on adjacent cutting blades.

Abstract: An insert rotary cutter for processing a metal workpiece includes a cutter body of a generally circular cross-section having an axis of rotation therethrough. The cutter includes one or more cutter inserts releasably mounted on a periphery of the cutter body. The insert includes a generally quadrilateral plate defined by a front face, a rear face disposed generally parallel to the front face and four side faces. The insert has a pair of main cutting edges defined by the front face and one pair of the opposite side faces. The pair of opposite side faces serve as respective rake surfaces for the main cutting edges. Each of the rake surfaces is convexly curved in such a manner that the width of the insert between the rake surfaces is larger at a central portion of each main cutting edge than at opposite ends of the main cutting edge.

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: An end milling tool having a positive axial rake angle in side elevation to facilitate removal of chips from the surface of a workpiece and a curved cutting edge having a neutral (zero) to positive rake angle in bottom plan view as it progressively cuts to enhance chip removal while precluding welding at the work area and enabling the use of a low cutting force. The tool cutting area is formed by a rhomboid-shaped indexable cutting insert at one end having an angular axial rake with a unique curved surface in side elevation provided with a lead corner and a strong included angle in an end elevational view. Other inserts are mounted on the tool above the rhomboid insert to form the remainder of the cutting area and are circular in side elevational view. Each of the rhomboid and circular inserts are mounted in an insert seat having a 60.degree. conical configuration to obtain maximum rigidity in seating of the insert.

Abstract: An indexable insert end mill having multiple triangular inserts spaced axially in overlapping cutting relation in isolated pockets arranged along a gradual helical angle extending axially of the end mill such pattern of axially spaced cutters being repeated at three 120.degree. circumferentially spaced positions on the periphery of the body. In a typical case the three helical rows of inserts each has five inserts equally spaced axially in overlapping relation and circumferentially in 40.degree. increments so that three effective teeth are provided at each of the five axial positions.

Abstract: The abrasive surface of the roller has the shape of a continuous helix with variable pitch constituted by a succession of single abrasive plugs of similar characteristics and size.

Abstract: An end mill has a plural number of helical blades formed on the main body of a machine tool. Each of the blades is provided with a plural number of notches spaced along its length and shifted relative to the corresponding notches in the preceding blade. When the notch is shifted to the tool end of the tool, the notch is inclined toward the shank end. On the other hand, when the notches are shifted toward the shank end of the tool, the notches are inclined in the opposite direction, i.e. toward the tool end. Therefore, the wear by rubbing on the side of the blade is diminished, the cutting resistance is decreased and the cutting performance is increased.

Abstract: A helical cutter in the form of a frustum of a cone having a plurality of cutting inserts supported on its periphery and extending throughout its length. The cutting inserts are in the form of helixes having scallops cut along their cutting edges.

Abstract: In a milling apparatus for removing root swellings from timber logs the log is received on two spaced apart supports with the butt-end of the logs freely overhanging from the supports. A holder-on urges the log against the supports. The holder-on as well as the supports comprise means for rotating the log relative to the holder-on as well as the supports. Under the overhanging butt-end of the log a milling cutter cylinder is arranged for machining the rotating log on the bottom side of the log so as to remove the swellings but no useful wood material.

Abstract: The milling cutter of the invention comprises a cutting section having a plurality of blades positioned on the surface and separated one from the other by flutes. At least two blades have one or more smooth segments, exhibiting an even and unbroken land and cutting edge, interspersed with one or more serrated segments containing a row of cutting teeth. The positions of the smooth and serrated segments are staggered from blade to blade so that in the course of one complete revolution of the cutter, each point along a surface being worked by the cutter will be contacted by at least one smooth segment and at least one serrated segment.

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 milling cutter, especially contour milling cutter, which comprises individual cutting elements helically arranged around the axis of the cutter body and connected thereto. These cutting elements are separated from each other in circumferential direction of the cutter body by chip grooves. All of the chip grooves extend helically about the axis of the cutter body in the same sense. Webs project from the cutter body and extend in the same sense helically about the axis of the cutter body while being separated from each other by the above mentioned chip grooves. Along the outer web edges which are located on a common cylinder mantle there are provided depressions or cutouts separated from each other by web sections which form the individual cutting elements.

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 roughing cutter has a generally cylindrical shank with a plurality of lands and angular flutes separating the lands. A plurality of straight-crested cutting teeth are formed on the lands with radial relief. Each tooth has a straight cutting edge generally perpendicular to the radial direction. The orientation of the cutting edge permits it to be in parallel relationship to a surface of a workpiece while in cutting engagement. This results in a smoother finish than would otherwise be possible. The teeth of the roughing cutter may be cut by an axially advancing milling cutter with a sloping cutting edge.

Abstract: A milling cutter rotatable about a central axis in a predetermined rotational sense has a plurality of helical blades separated by helical flutes and each formed with a row of teeth each having an axially directed end flank and a radially outwardly turned side flank. Each of the side flanks is inclined toward the axis by an angle between 3.degree. and 15.degree. from a high end at the respective end flank to a low end. Each of the teeth is further formed with a rounded chamfer at the high end and between the flanks. Each of the rows of teeth is axially offset from the circumferentially flanking rows with the rounded chamfers of each row being aligned circumferentially relative to the rotational sense behind the respective low ends of the row in front.