Abstract: A hole saw is disclosed herein. The hole saw can include a cylindrical body having inner and outer cylindrical surfaces concentric to each other about a first axis. The body can also extend along the first axis between first and second opposite ends. The hole saw can also include a plurality of teeth each including a tooth body and a carbide tip positioned on the tooth body and forming a tooth face. Each of the tooth faces can define one or more cutting edges. The teeth can be arranged in an alternating pattern including a first tooth in the form of a chisel tooth, a second tooth immediately behind the first tooth and in the form of an offset grind tooth, and a third tooth immediately behind the second tooth and in the form of a triple chip grind tooth.

Abstract: A method for manufacturing an escapement wheel (10) including steps of creating an escapement wheel ébauche having a hub (11) connected to a felloe (12) by radial arms (13), and teeth (14) regularly distributed around the periphery of the felloe (12), and simultaneously machining a reduction of cross-section of the free end of each tooth (14), by a cutting tool (20) aligned coaxially with the escapement wheel ébauche.

Abstract: A rotary milling tool has a tool holder and a milling head releasably attached thereto. The milling head has a plurality of angularly spaced apart peripherally disposed cutting edges which form an effective cutting edge. The milling head has a head through recess opening out to the head forward and rearward surfaces. The recess includes a centering region and a driven region, the driven region being axially forward of, and non-identical to, the centering region. The driven region has at least one driven surface facing opposite a rotational direction. The centering region has at least one radially inwardly facing radial centering surface located axially rearward of, and radially outward from, the at least one driven surface. The two opposing extremities of the effective cutting edge define two parallel planes respectively between which both the at least one driven surface and the at least one radial centering surface are disposed.

Abstract: A circular saw blade includes a circular plate having a diameter, a thickness, a left face, a right face, a peripheral rim, and a central opening. A plurality of alternating teeth and gullets are disposed about the peripheral rim, each tooth having a front face facing generally toward an adjacent gullet in the cutting direction and a recess defined in the front face. A plurality of cutting inserts are affixed in the recesses in the teeth. Each insert has rake face facing generally toward the adjacent gullet in the cutting direction, a relief face extending generally toward the adjacent top face, and a cutting edge at a junction between the relief face and the rake face. Each rake face is disposed at a hook angle. The relief faces include unbeveled relief faces, left-beveled relief faces, and a right-beveled relief faces arranged in an alternating top bevel with raker pattern.

Abstract: A milling cutter includes a cutter body and at least three circumferentially spaced insert pockets, axially offset one with respect to the other, each having a replaceable cutting insert secured thereto. Each cutting insert has at least two identical straight serrated cutting edges and all the cutting inserts are identical. A first insert pocket (30) is an axially forwardmost insert pocket. A second insert pocket is axially offset from the first insert pocket by a first offset distance that is smaller than an offset distance associated with any other pair of axially adjacent insert pockets.

Abstract: Expansion joint system of a concrete slab arrangement, comprising an expansion joint reinforcement to be arranged between a first and a second concrete slab (1, 2), the expansion joint reinforcement comprising at least two local dowels (3)transferring loads perpendicular to the slab plane. The dowels comprise a dowel plate (4) and a casing part (5). The dowel plate (4) and the casing part (5) are attached to the concrete slabs on different sides of the joint. The casing part (5) prevents the dowel plate from adhering to the concrete slab and allows the dowel plate (4) to move inside the casing part and thus allows the movements of the slabs (1, 2) in the horizontal direction. The dowels (3) are installed alternately relative to the joint so that the casing parts (5) of the adjacent dowels (3) are always installed on different sides of the joint.

Abstract: The invention relates to a machining tool (14) for machining materials by removing material, in particular for wood or wood-like materials, metals, plastics and/or composite materials. The machining tool is provided to be driven in rotation about an axis of rotation (1) and comprises at least one row (17, 18, 19) of individual cutters (2, 2?) arranged in the peripheral direction and having cutting edges (3, 3?) which at least partly overlap. The cutting edges (3, 3?) have a rake angle and are located at an axial angle (?) in relation to the axis of rotation (1). The axial angle (?) lies in a range from 55° to <90° inclusive. The rake angle is >55°.

Abstract: A rotary cutting tool such as a helical end mill, having pockets arranged to overcome harmonic vibrations. The tool has at least two and in one embodiment all three of three spacing irregularities. In the first irregularity, columns of pockets, typically associated with flutes, are staggered circumferentially out of even spacing. In a preferred embodiment having three flutes, the flutes are mostly not centered on one hundred twenty degree intervals. In the second irregularity, at least some pockets are arranged at different radial rake angles. In the third irregularity, at least some pockets are arranged at different axial rake angles.

Abstract: Rotary cutting tools for cutting various types of sheet material are known. However, when cutting non-ferrous materials, damage known as fluttering is caused to both surfaces of the sheet material being cut. The requirement for the cutting of larger and larger sheets of material for safety critical applications such as aircraft wings has made fluttering unacceptable. Furthermore, scrapping sheets of material which exhibit fluttering is extremely expensive. Fluttering occurs as a result of excess pressure being placed on a workpiece edge as it is being cut. A rotary cutting tool (10) for a power tool is disclosed in which the cutting tool comprises body means (12) having a first flute (20, 30), a substantially planar first cutting surface (22, 32) and a first cutting edge (24, 34) formed on said first cutting surface; and wherein said first cutting edge (24, 34) is formed at a first angle to a longitudinal axis of the cutting tool. This cutting tool addresses the problems associated with fluttering.

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: A method for assembling or disassembling cutting inserts mounted in a rotary cutting tool assembly (20). The cutting tool assembly comprises a plurality of coaxially mounted cutters (22) on a common shaft (24) having an axis of rotation (A). The cutters have insert receiving pockets (30) having threaded bores (38) substantially parallel to the axis of rotation (A). Each of the insert receiving pockets has a cutting insert (28) having a through bore that is substantially parallel to the axis of rotation (A). Each of the cutting inserts is secured by means of a clamping screw (36). Each clamping screw is tightened with a key (42), the key having a head portion (44) engaging the clamping screw and a holding portion (46) transversely directed to the axis (B) of the head portion.

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 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 slotting cutter including a support disc rotatable in a predetermined direction on a central axis. The support disc is of a generally cylindrical shape having a first side and a second side, and an outer periphery. A plurality of pockets including a cartridge assembly are staggered about the outer periphery of the support disc and include a cutting insert secured to each cartridge assembly. Each cutting insert includes at least one cutting edge. The cutting insert extends laterally outwardly beyond the first side of the support disc and is spaced from the second side of the support disc such that the cutting edge of adjacent inserts are positioned to laterally overlap thereby providing an increased effective cutting path width.

Abstract: A throwaway insert for a pin mirror cutter in which eight corners can be used and which the cutting performance and machining accuracy can be increased by making positive the axial rake angle of the peripheral cutting edge. Side faces of a negative insert of a parallelogrammic shape are formed by two surfaces connecting to each other at an angle so as to have a first included angle and a second included angle. Further, independent arcuate surfaces are provided at the intersections between the arcuate corner sides of each of the side faces and the top and bottom surfaces and the intersections between the obtuse corner sides and the top and bottom surfaces.

Abstract: A cutting tool comprising a cutter body member having a generally circular shape, a front surface, a back surface and an axis of rotation, the cutter body member includes an outer portion comprising a plurality of individual projections arranged spaced from one another about the cutter body with the space between successive projections defining receiving slots for cutting blades. The individual projections each further comprise an outer surface with at least one of the outer surfaces including a protrusion. Each of the blade receiving slots comprises opposing first and second side surfaces and an inner end portion with the inner end portion having a pair of angled mounting surfaces, one of the mounting surfaces extends from the first side surface and the other mounting surface extends from the second side surface with the angled mounting surfaces extending toward one another. Each of the angled mounting surfaces is oriented at an angle of less than 90 degrees with respect to its respective side surface.

Abstract: In a mounting mechanism for a pin mirror cutter 22, the cutter body 22 is mounted with its outer periphery inserted into the inner periphery of a cutter mounting portion. an inclined surface of a tapered portion 22 formed on the cutter body and an inclined surface of a tapered portion formed on the cutter mounting portion are in surface-contact with each other, and the diameters of the contact surfaces gradually decrease in the direction of insertion of the cutter body into the cutter mounting portion. Furthermore, these inclined surfaces and are formed by a plurality of flat surfaces so as to form regular octagonal pyramid surfaces.

Abstract: A cutting tool including a cutting tool body having a peripheral surface formed with a plurality of recesses each adapted to receive an insert receiving cartridge. Each cartridge has transversely directed first and second side surfaces with an imaginary bisector plane therebetween defining a leading cartridge portion associated with the side surface and a trailing cartridge portion associated with the side surface. The leading cartridge portion includes a chip clearance wall and the trailing cartridge portion includes an insert receiving pocket with a cutting insert having a peripheral cutting edge which protrudes in respect of the peripheral surface. Each recess has leading and trailing surfaces converging away from the peripheral surface and against which abut the side surfaces of its associated cartridge received therein. Both the side surfaces are co-extensive with the leading and trailing surfaces.

Abstract: A deep groove, for example a groove in a rotor for a generator or turbine, can be formed in the rotor blank in only two sequential milling cuts, and wherein each milling cut, utilizing a single rotary milling cutter, carries out at the time both coarse cutting of the groove and finish cutting, for surface smoothing, of the coarse cut along the inner surfaces of the groove. The milling cutter carries cutter chips (22, 23, 25; 44, 46) retained against chip seats (27) in cutter chip cartridges (21, 210) wherein at least some of the cutter chips have at least one end cutting edge forming a main or coarse cutting edge (33, 35, 42; 45, 47) exposed from the respective cartridge and the tool body (13, 130) for main or coarse cutting. Some cutter chips located on the cartridges also have at least one fine or finish side cutting edge (36, 49) exposed for cutting.

Abstract: It is an object of the invention to provide an economical milling cutter for T shaped groove.This invention is a milling cutter for T shaped groove comprising at least three cutting edge mounting seats distributed peripherally on a body one end flange of the milling cutter, on the first cutting edge mounting seat a first cutting edge for cutting remotest part from the cutting machine being mounted, on the second cutting edge mounting seat a second cutting edge for cutting nearest part from the cutting machine being mounted, on the third cutting edge mounting seat located between the first and second seats a third round or polygonal cutting edge being mounted, and the third cutting edge projecting radially outwardly from the rotation center line of the body between and from two portions cut by the first and second cutting edges.

Abstract: Apparatus including a saw mill cutter for removing risers or excess material from castings such as for engine blocks, cylinder heads, cam carriers, transmission housings and the like, with the saw mill cutter simultaneously cutting the riser from the casting body while milling the cut surface to form a finished and/or semi finished surface and with a method for utilizing such a saw mill cutter and forming such finished and/or semi-finished surface and with one form of the method including feeding the casting widthwise to the cutter such that it is cut and milled along its length.

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 cutting insert is disclosed which includes a polygonal plate-shaped insert body having two opposite faces directed in the direction of insert thickness and a plurality of peripheral faces lying between the opposite faces. The opposite faces have marginal edges with at least one of the marginal edges defining a main cutting edge. The peripheral faces intersect one another to form marginal edges with one of the marginal edges defining an auxiliary cutting edge which intersects the main cutting edge. The peripheral surface which includes the marginal edges defining the main and auxiliary cutting edges includes a rake region extending along the main and auxiliary cutting edge.

Abstract: The cutting head for a surgical reamer has a leading end for insertion into a bone canal and a trailing end for attachment to a drive shaft. The cutting head has a cutting surface formed about an axis of rotation of the cutting head. The cutting surface is formed by the rotation of the cutting edges on a plurality of flutes spaced around the axis of rotation. Each cutting edge has a first portion spaced a predetermined radial distance from the axis of rotation at the tip portion and terminates at a terminating point which is at a greater radial distance from the axis of rotation than the starting point. The cutting edge on each flute has a second portion having a starting point at the trailing end of the cutting head which is at a second predetermined radial distance from the axis of rotation. The second portion extends axially towards the tip portion and terminates at a point at a greater radial distance from the axis of rotation than the starting point thereof.

Abstract: A disc mill comprises a plurality of reversible cutter plates arranged in an alternating order and having an adjustable cutting width, a base body composed of at least two disc, a plurality of claw-like posts provided on each of the discs and carrying a respective one of the reversible cutter plates. The posts of one of the discs engage in a coupling-like manner in a chamber between two neighboring posts of the other disc.

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: Boring bar having plural circumferentially spaced cutting inserts with incremental radial and axial spacing for innermost radial and foremost axial to outermost radial and rearmost axial in progressive sequence relative to the direction of rotation.

Abstract: A face milling cutter for holding a plurality of cemented tool bits for rotation about an axis and an associated method utilize a body of material defining a shank portion securable within a rotatable spindle of a machine tool for rotation about an axis and an insert-accepting body portion within which the tool bits are supported. The insert-accepting body portion is generally cylindrically in shape and joined to the shank portion so that the longitudinal axis of the body portion coincides with the axis of rotation of the cutter. Furthermore, the body portion defines a plurality of radially outwardly-opening recesses extending along the length of the cylindrical periphery of the body portion. Each recess is adapted to accept the shank of a tool bit so that when operatively positioned therein, the tool bit shank extends generally longitudinally of the cutter body portion.

Abstract: A cutting-tool insert having a cutting edge at the periphery of at least one of its side faces, and a plurality of serrations in the cutting edge. The side faces of the insert are formed with a plurality of recesses between its center and the cutting edge. The plurality of recesses are spaced from each other around the center of the side face, and are also spaced from the serrated cutting edge, to define a margin between the cutting edge and the recesses extending continuously along the length of the cutting edge following the serrations. Also described is a cutting tool using such inserts.

Abstract: A rotary router bit for smoothing the edges of a sheet of abrasive or easily splintered material has two collars axially spaced on the router shank. Each collar has peripheral cutting teeth overlapping opposed teeth of the other collar and inclined at a shearing angle with respect to the axis of the shaft. The teeth extend oppositely toward each other and are formed around a central open space between the teeth and the shank into which chips from the sheet are fed so as not to clog the cutting edge of the teeth but so as to allow for subsequent ejection from the bit.

Abstract: A rotary cutter having serrated cutting edges formed by the intersection with a cutting face of serrations angularly inclined to the cutting face to provide side clearance for the trailing sides of the serrations.

Abstract: An apparatus for processing wood, comprising a cylindrical drum mounted for rotation about its longitudinal axis, a cutting member, means for mounting the cutting member upon the circumferential surface of the drum such that its cutting edge is positioned a first distance from the drum surface, means for rotating the drum such that the cutting element passes along a circular path concentric to the surface of the drum, a pair of parallel ring sections each having a first and a second end and a substantially uniform cross section, and having an arcuate configuration along their length substantially conforming to the circumferential surface of the surface of the drum, the first ends of the spacing elements being positioned laterally adjacent to the path of travel of the cutting member, and extending in parallel relationship in front of the cutting member such that a gullet is defined in front of the cuting edge by the cutting member, the ring sections, and the surface.

Abstract: A cutter for forming a spiral groove on a work is provided.The cutter comprises a cylindrical body provided on the outer periphery thereof with a plurality of cutting edges arranged circumferentially at equal intervals and displaced axially by a predetermined pitch. Further, each of the cutting edges is provided with a pair of additional cutting edges adjacent thereto and displaced circumferentially on both sides, respectively, so that when the work and the cutter are rotated in the same direction, a high-precision spiral groove is formed on the work.A screw-shaft machined by the cutter according to the present invention is effectively used for a carriage transfer unit of a still video floppy disk drive, allowing accurate adjustment of the portion of the carriage and accurate transfer of the carriage with respect to the disk to be performed in a simple manner and at low cost.

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 waferizing apparatus having a rotatable disc. There are knife carriers mounted on the disc with spaced openings between the carriers. Openings in the disc correspond to the openings in the carrier and there is a knife associated with each opening. A knife clamp is bolted to the carrier to clamp each knife in position. Each knife clamp is urged resiliently inwardly against the carrier to clamp each knife in position in the apparatus. An expandable device can expand to separate the clamp and the carrier to permit removal of each knife.

Abstract: A milling cutter for cutting the contaminated surface of concrete and used at the time of repairing and dismantling nuclear facilities. The milling cutter is characterized in that guide grooves are provided on the outer surface of a body, with their edges slanted from both sides of the body toward the center thereof, and that cutter chips are located along the stepped edge of each of the guide grooves in such a manner that the cutter chips can be easily detached and that those located along the stepped edges of the adjacent grooves are symmetrical in relation to the center line of the body.

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: A face milling tool is described including a holder securable to the end of a rotatable spindle. Cutting inserts are detachably secured to the end face of the holder at a radial distance from the axis of the spindle. The cutting edges of the inserts extend outwardly of the holder end face such that the cutting edges are free to engage and machine the surface of a workpiece. The inserts are of a wafer-like form and means are provided for detachably securing the inserts to the holder through a central axial aperture in the inserts. The securing means lies within the outer end face of each insert and the cutting edge of each is substantially straight, being formed by a portion of an edge at the intersection of the insert side wall and the end face. Each insert lies at such an angle to the plane of the workpiece that the insert side wall forms a rake face and the outer end face of the insert forms a clearance face and the straight cutting edge lies at a small radial shear angle.

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: Metal working tools or tool holders having a body with flat-faced surface containing insert pockets with at least two indexable inserts in each pocket are described. A tapered wedge block is positioned between each pair of inserts to wedge the inserts against the walls of the insert pocket and to separate the pair of inserts from each other. The pair of inserts have parallel cutting edges facing the leading wall. In one preferred embodiment, a pair of indexable cutter inserts are positioned in each pocket of a plural pocket face mill body. The inserts are positioned in leading and trailing positions with an intermediate wedge block to provide parallel cutting surfaces in the same direction.

Abstract: A milling cutter for a crankshaft milling machine includes a disk, a plurality of generally square-shaped tips mounted on the disk and a plurality of forming tips mounted on the disk. The square-shaped tips and the forming tips are alternately arranged in two rows for effecting simultaneous machining of both end portions of each crank or main bearing.Each square-shaped tip is arranged to machine main and crank bearings and rounded corners of the bearings while each forming tip is mounted to machine side walls of webs between the bearings, shoulders each provided between the respective bearings and webs, the rounded corners and the main and the crank bearings.

Abstract: A wood incisor for perforating the surfaces of a rectangularly cross-sectioned elongate board preparatory to preservative treatment is comprised of sets of paired horizontal and vertical drums arranged in a manner to provide a rectangular passageway of adjustable height and width for passing various sized boards, with each drum having a plurality of outwardly protruding cutting teeth. Each set of drums includes a fixed drum which is driven, and an idler drum which is slideable with respect to its associated fixed drum by actuation of positioning hydraulic cylinders to provide the adjustability of the passageway therebetween. Each of the positioning hydraulic cylinders is joined end-to-end with a cushioning hydraulic cylinder which is connected hydraulically to an accumulator tank containing pressurized hydraulic fluid and air. Thus the position of each idler drum relative to its associated fixed drum is responsive to the lateral force imparted to that set of drums by the board passing therebetween.

Abstract: A rotary cutter, in the nature of a milling cutter, especially for agglomerated foam plastic, has a body with a concentric surface of revolution onto which are brazed block-like carbide cutting elements. The cutting edges of circumferentially adjacent cutting elements lie on lines spaced apart circumferentially by between 0.60 in. (15 mm.) and 0.165 in. (17 mm.), and the kerfs of such cutting elements overlap. The cutting elements are received in shallow axially extending grooves in the body; their axial locations are established by reference to lines scribed around the body at uniform axial intervals.