Abstract: A laterally cutting saw blade assembly includes a plate that has a pair of opposed faces, a center and a peripheral edge having a plurality of shoulders attached thereto. Each of the shoulders has a pair of opposed faces. The shoulders each have a distal edge with respect to the peripheral edge. The distal edge of each of the shoulders extends between a tailing edge and a leading edge of each of the shoulders. A plurality of teeth is provided. Each of the leading edges has one of the teeth attached thereto. The teeth extend laterally away from each of the opposed faces. The teeth form a plurality of cutting surfaces extending continuously from the distal edge toward the center a distance equal to at least equal to 1.90 cm. The plate is mounted to a cutting assembly and rotated to cut lateral to the opposed faces.

Abstract: An unequal helix-angle end mill includes a cutting part and a handle part. The cutting part is provided with a plurality of flutes, each spirally extending from the bottom end to the handle part. The face of each flute facing the cutting rotation direction is a rake face, wherein the rake face and an outer peripheral face of the cutting part are intersected to form an outer peripheral blade, and the helix-angle of at least one of the peripheral blades is different from those of the other peripheral blades. A face joined with the peripheral blade among the outer peripheral face of the cutting part is a rear face. The width B of the edge flap of each peripheral blade is equal on a plane orthogonal to a rotating axis of the end mill. The unequal helix-angle end mill has high strength, and enhances the cutting depth and durability.

Abstract: An end mill for machining titanium includes a cutting portion having blunt cutting edges alternated with flutes. Each flute includes, in order from the cutting edge, a rake surface, a concavely shaped bending portion, a convexly shaped ejecting portion and a tooth relief edge. The convexly shaped ejecting portion has an ejection height E, which is measurable between an apex of the ejecting portion to an imaginary straight line extending from a nadir of the adjacent bending portion of the flute to the adjacent tooth relief edge. In a plane perpendicular to a rotation axis of the end mill, the ejection height E and a cutting portion diameter DE, fulfill the condition 0.010DE<E<0.031DE.

Abstract: An end mill for machining titanium includes a cutting portion having blunt teeth alternated with flutes. Each flute includes, in order from the cutting edge, a rake surface, a concavely shaped bending portion, a convexly shaped ejecting portion and a tooth relief edge. The convexly shaped ejecting portion has an ejection height E, which is measurable between an apex of the ejecting portion to an imaginary straight line extending from a nadir of the adjacent bending portion of the flute to the adjacent tooth relief edge. In a plane perpendicular to a rotation axis of the end mill, the ejection height E and a cutting portion diameter DE, fulfill the condition 0.010DE<E<0.031DE.

Abstract: In a semi-finishing cutter, rectangular tips and square tips are disposed in a staggered pattern in an axial direction in second to fourth step portions, so a single cutting edge is formed by a pair of one of the rectangular tips and one of the square tips. It is therefore possible to effectively reduce a frequency of contact with a blade root. A cutting speed of the semi-finishing cutter may be increased and a cutting feed may be made faster, so work in a semi-finishing process may be performed efficiently. The rectangular tips and the square tips have simple shapes, so known commercially available throwaway tips may be used. Accordingly, it is possible to provide the semi-finishing cutter in an easy-to-use form without increasing the cost.

Abstract: A face milling cutter has a shank portion adjoining a cutting portion. The cutting portion terminates in a plurality of cutting edges extending in a radial direction from a central axis of the face milling cutter. The cutting edges are convexly curved at least along a part of their length. A portion of the cutting edges proximate the central axis is nearer in an axial direction to the shank portion than a point, X, on the cutting edges that is farthest away from the shank portion. A distance Y, between the point, X, and the central axis is between 20% and 40% of a diameter, D, of the face milling cutter, and a central portion extends the distance, Y, and has a radius of curvature of about 110% of the diameter, D.

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: A method of manufacturing a multi-tooth fir-tree or bulbous form milling cutter, by the grinding of a blank with a grinding wheel, wherein, a flat clearance angle ? of between 0° and 20° is generated on each tooth (13) by the path (14) of the grinding wheel (10), with each tooth (13) having a width (X) from tip to point of maximum clearance (see FIG. 5), calculated as follows: —X={[(R tan ?)cos ?] cos ?}±0.25% (being calculation (A)) where R=radius of cutter, and where ?=clearance angle measured from a tangent to the tooth tip, and furthermore, wherein, each tooth (13) has a variable depth (Y) around the cutter, calculated as follows: —Y={[?D]/[180/?]}0.5±0.2. (being calculation (B)) where D=maximum diameter of the form at any given point along the form. The invention also includes fir tree and bulbous milling cutters produced by the above defined method.

Abstract: An end mill includes first cutting edges which spiral in a direction defining a positive helix angle and second cutting edges which spiral in a direction defining a negative helix angle, the first cutting edges and the second cutting edges being disposed at positions shifted in a circumferential direction. The first cutting edges and the second cutting edges are each configured to be continuous over an effective cutting edge length. At an axially forward end of the end mill, a first phase angle between one of the first cutting edges and its adjacent second cutting edge located adjacent to the first cutting edges in an opposite direction to a tool rotation direction is set to be different from a second phase angle between the second cutting edge and its adjacent first cutting edge located adjacent to the second cutting edges in the opposite direction to the tool rotation direction.

Abstract: The invention relates to a cutting insert (10) with a base, having a supporting surface, a covering surface, at a distance therefrom and side faces (101, 102), connecting said surfaces, whereby two or several adjacent surfaces form cutting edges (103, 104, 105). According to said invention, the supporting surface is connected in a non-detachable manner to a supporting surface of a cutting plate (11), the geometry of which is different from the cutting insert (10) and suitable for another metal cutting operation.

Abstract: A milling cutter and a cutting insert therefor for rough and smooth machining of a workpiece. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: A rotationally drivable cutting or milling tool has at least one first cutting tooth effective in a first rotational direction and at least one second cutting tooth effective in a second rotational direction opposite to the first rotational direction. The at least one first cutting tooth and the at least one second cutting tooth have differently oriented cutting edges for performing different machining steps in the first and second rotational directions, respectively.

Abstract: The invention relates to a cutting insert having an essentially parallelepiped-shaped basic body with two larger spaced-apart longitudinal surfaces (10,11) which are connected to one another by two smaller transverse surfaces (12, 13) and two smaller longitudinal surfaces (14) designed as rake faces, wherein the smaller longitudinal surfaces (14) form with the adjacent surfaces a respective, encircling, closed cutting line which forms the cutting edges and rounded-off cutting corners, and the larger longitudinal surface (10, 11) merges on both sides via respective rounded-off edges into the smaller transverse surface (12, 13), and one of the rounded-off cutting corners is designed so as to project relative to a basic shape which is determined by the cutting lines, on both sides, of the larger longitudinal surfaces (10, 11) with the smaller longitudinal surfaces (14).

Abstract: A method of cutting grooves having a trapezoidal profile into an airport runway. Each of the grooves has a base of a first width, an open top of a second width and sloped sidewalls. The grooves are cut by the single pass of a rotating blade. The blade used to cut the trapezoidal shaped grooves has a plurality of cutting teeth. Each of the cutting teeth has a wide body section, a face surface, a bottom surface and side surfaces that extend from the face surface to the wide body section. The wide body section has a width equal to the maximum width of the groove being cut. However, the face surface has a width equal to the minimum width of the groove being cut. The result is a cutting tooth that cuts smoothly and maintains its trapezoidal shape as it wears.

Abstract: A package cutting apparatus includes at least two spindles installed at a sawing robot and cutting a frame including a plurality of packages into packages using cutting bits; a frame loading jig loading the frame so that the frame is cut; and a frame-and-unit picker installed at an orthogonal robot to load and unload the frame on and from the frame loading jig, wherein a state of the cutting bit installed at the spindle is checked.

Abstract: A rotary cutting tool is provided having an axis of rotation, a shank section, a fluted section, and a plurality of helical teeth. The shank section and the fluted section both extend along the axis of rotation. The fluted section has a first end integrally attached to the shank section, a second end, and an outer surface extending between the first and second ends. A plurality of helical teeth is disposed along the outer surface, each having a cutting edge and an undulating geometry. The helical teeth are arranged so that rotationally successive cutting edges are sufficiently dissimilar relative to one another to inhibit a detrimental periodic response in the rotary cutting tool.

Abstract: A thread milling tool includes a proximal shank portion and a distal cutting portion. The cutting portion includes at least one thread milling tooth and at least one flute oriented helically, or spirally, about a central rotational axis of the tool. The cutting portion may be configured to form internal or external threads in a workpiece as the cutting portion moves relative to the workpiece. The teeth of the thread milling tool have a negative taper angle or back taper to offset deflection of the tool during milling operations.

Abstract: A cutting tool having multiple cutting edges includes a tool body having a longitudinal axis, a first cutting edge including a first leading edge that defines a first profile when rotated about the longitudinal axis, and a second cutting edge including a second leading edge that defines a second profile when rotated about the longitudinal axis, the first and second profiles being different from each other and being adapted to cut a workpiece in succession. A method is also disclosed.

Abstract: A cutting tooth element for a cutting blade. The cutting tooth element has a body. The body has a forward surface, a rearward surface and a peripheral edge surface that extends from the forward surface to the rearward surface. The peripheral edge surface has a constant width that is equal to the width at the bottom of the groove that is to be cut. The body of each cutting tooth has a thickened area between its forward surface and rearward surface. The thickened area has a maximum width equal to the width at the top of the groove that is to be cut. The body has sloped side surfaces that extend from the thickened area to the forward surface, rearward surface and the peripheral edge surface. The resulting shape of the cutting tooth causes the cutting tooth to retain its cutting profile as it wears.

Abstract: A rotary cutting tool with a longitudinal axis includes a shank portion, a cutting portion defining a length of cut. The cutting portion includes a plurality of blades separated by flutes. The blades and flutes extend substantially along the length of cut. The flutes have a tapered depth along the longitudinal axis. Each blade includes a leading face, a trailing face, a land surface that extends between the leading face and the trailing face, and a cutting edge at the intersection between the leading face and the land surface. Each blade includes a wave pattern that begins at a first distance from the cutting tip for a first blade, and at a second distance from the cutting tip for an immediately adjacent blade. The wave pattern then repeats in an alternating fashion for each additional blade.

Abstract: A radius endmill has a peripheral cutting edge, a bottom cutting edge, and a rounded corner cutting edges whose ridge line is defined by a circular arc having a given radius as measured in a side view of the endmill that is parallel to the axis. The rounded corner cutting edge is located in a corner portion of the endmill in which the outer peripheral and the axial end intersect each other such that the peripheral cutting edge and the bottom cutting edge are connected to each other through the rounded corner cutting edge. The bottom cutting edge has a radially inner end lying at the axis, and a radially outer end at which the bottom cutting edge is connected to the rounded corner cutting edge. The bottom cutting edge is curved such that its ridge line is defined by a circular arc as seen in a plan view of the endmill that is perpendicular to the axis.

Abstract: A mill has a front cutting portion with a plurality of peripheral cutting edges extending rearwardly from a front cutting end. Each peripheral cutting edge is adapted to generate a corresponding outer envelope of a body of revolution as the mill rotates around its longitudinal axis. At least one cutting edge is adapted to generate a cylindrical outer envelope; at least one cutting edge is adapted to generate a generally frusto-conical taper outer envelope extending away from the front cutting end while tapering radially outwardly; and at least one cutting edge is adapted to generate a generally frusto-conical dovetail outer envelope extending away from the front cutting end while tapering radially inwardly.

Abstract: The present invention relates to a router tool for edging the peripheral edge of eyeglass lenses. The tool comprises a longitudinally extending body rotatable on the axis thereof. A first blade extends axially and radially from the body, and has a first cutting portion for shaping an edge of a lens to a first configuration. A second blade is provided that is axially spaced from the first blade. The second blade extends axially and radially from the body, and has a second cutting portion for shaping an edge of a lens to a second configuration different than the first configuration. The present invention also relates to an edger having the disclosed router tool, and a method for shaping the edge of eyeglass lenses.

Abstract: A rotary cutting tool with a longitudinal axis is provided that includes a shank portion, a cutting portion, and a plurality of chip-breaking features. The cutting portion, which extends out from the shank portion, includes a length, a plurality of blades and a plurality of flutes. The blades and flutes extend substantially all of the length of the cutting portion. Each blade includes a leading face side, a trailing face side, and a land surface that extends between the leading face side and the trailing face side. The plurality of chip-breaking features are disposed in the land surfaces of the blades, and non-uniformly distributed among the blades.

Abstract: A rotary cutting tool has a substantially cylindrical main body and four flutes. The main body has a shank end, a cutting end formed integrally opposite the shank end, and a longitudinal axis of rotation. The four flutes include a pair of flutes comprising a first flute and a second flute formed on opposite sides of the main body, and each of the pair of flutes are symmetrical and have the same helix angle. A third flute is formed on one side of the main body between the pair of flutes, and defines a helical cutting edge having a helix angle that is different than the helix angle of the pair of flutes. A fourth flute is formed on the other side of the main body, and defines a helical cutting edge having a helix angle that is different than the helix angle of the pair of flutes and different than the helix angle of the third flute.

Abstract: An end mill for cutting or milling objects and a method of operation thereof. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: A rotary cutting tool comprises a body having opposite ends and a plurality of diametrally opposed pairs of flutes forming cutting edges extending helically from one end of the body toward the opposite end. All of the cutting edges are circumferentially spaced uniformly from one another at the one end of the body. Each cutting edge of one pair of edges is formed on the same and uniform helix, whereas each cutting edge of another pair of edges is formed on a uniform helix which varies from the cutting end of the body toward the opposite end. The steepness of the helices is such that no flute communicates with any other flute and, at a zone between the ends of the flutes, the cutting edges formed by such flutes again are uniformly circumferentially spaced from one another.

Abstract: An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The cutting surface of each helical tooth includes a first section, a second section, and a take-off peak disposed between the first section and second section. The cutting edge of each helical tooth includes a first portion having a first constant angle, and a second portion having a second constant angle unequal to the first constant angle, and an arcuate transition section connecting the first portion and second portion. Some embodiments of the present invention include more portions than the aforesaid first and second portions.

Abstract: A multi-purpose end-mill to be used for different machining purposes, in particularly useful for closed or open contours machining. The end-mill comprises a cylindrical shank portion connected to a first cutting portion provided with a plurality of spaced-apart cutting teeth and a second portion provided with a plurality of different spaced-apart cutting teeth.

Abstract: The present invention relates to a router tool for edging the peripheral edge of eyeglass lenses. The tool comprises a longitudinally extending body rotatable on the axis thereof. A first blade extends axially and radially from the body, and has a first cutting portion for shaping an edge of a lens to a first configuration. A second blade is provided that is axially spaced from the first blade. The second blade extends axially and radially from the body, and has a second cutting portion for shaping an edge of a lens to a second configuration different than the first configuration. The present invention also relates to an edger having the disclosed router tool, and a method for shaping the edge of eyeglass lenses.

Abstract: A rotary cutting tool is disclosed including a substantially cylindrical main body having a shank portion at one end and a point at an opposite end. Five flutes are formed in an outer surface of the main body. Each of the flutes extends continuously from the point to the shank portion, and defines a helical cutting edge having a helix angle between about 32 degrees and approximately 34 degrees with respect to an axis of the main body. At least 2 of the flutes define helical cutting edges having different helix angles.

Abstract: A tool for chip removing machining includes a tool head having at least one chip pocket formed therein which serves as a common pocket for first and second replaceable cutting inserts. The inserts perform mutually different machining operations and have their respective active surfaces disposed in generally mutually facing relationship to one another within the pocket. A radially outermost portion of the first insert is spaced farther from a center axis of the tool head than is a radially outermost portion of the second insert.

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: 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: 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: The invention relates to a device and method for making tenons using an adjustable shim placed between cutting blades. The adjustable shim has a plate with a recess capable of accepting spacers of varied thicknesses and a cover that encloses any of the spacers placed in the recess. The thickness of the adjustable shim is adjusted by placing spacers in the recess to shim apart the cutting blades leaving between them a distance approximately equal to the desired tenon thickness.

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: 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 method for manufacturing a liquid jet recording head comprises the steps of obtaining a laminated body by laminating a liquid path formation layer forming liquid paths on a metallic base board having discharge energy generating elements on it, forming an orifice surface by cutting the laminated body thus obtained, and grinding the orifice surface thus formed by use of a cutting tool or a milling cutter. With this method that uses a metallic base board, it is possible to obtain a high-performance yet an inexpensive liquid jet recording head without any defects on the orifice surface, which contributes to implementing more stabilized liquid discharge.

Abstract: An adjustable dado having the adjustment ease of a wobble type dado with the cut quality of a stacking type dado. The outer cutting blade is bored and threaded, and a threaded adjusting collar is threaded into the outer blade. An adjustment washer has pins to engage openings in the adjusting collar, so that rotation of the adjustment washer adjusts the position of the outer blade. The invention allows quick and easy adjustment of a stacking dado without removal of the dado blades.

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 tire rasp blade is provided with an elongated planar body having a working portion comprising a plurality of uniformly and closely spaced teeth which define an arcuate working perimeter. Each of the teeth has a base and a working edge and is separated from neighboring teeth by generally elliptical primary cutouts which are oriented normal to the tangent of the working perimeter. The teeth are preferably monolithic and of a uniform size and shape, and are both angularly set and laterally displaced relative to the plane of the blade body.

Abstract: A rotary cutting tool includes a body having a cutting portion and an axis of rotation therethrough. The body has a plurality of helical flutes formed in a circumferential surface of the cutting portion in circumferentially spaced relation to one another and extending helically axially of the cutting portion so as to define a plurality of helical lands of a generally uniform land width spaced circumferentially of the cutting portion from one another. The body has a plurality of helical peripheral cutting edges each defined by a portion of an inner surface of a respective one of the helical flutes facing in a direction of rotation of the body and a surface of the land adjacent to the portion of the inner surface. At least one of the peripheral cutting edges has a helix angle different from helix angles of the other peripheral cutting edges. The peripheral cutting edges are equally spaced circumferentially of the body in at least one plane disposed perpendicularly to the axis of rotation of the body.

Abstract: A ball end mill includes a body, an indexable cutter insert and a clamp screw. The body has a recess formed in a forward end portion thereof and a bore formed therein and opening to a bottom face of the recess. The bore includes a cylindrical portion disposed adjacent the bottom face and an internally threaded portion greater in diameter than the internally threaded portion. The insert includes a front face, a rear face and at least two convexly curved side faces. The front face has at least two convexly curved main cutting edges each defined by the intersection of a respective one of the curved side faces with the front face. The insert has an aperture formed therethrough and extending generally perpendicular to the rear face. The insert is releasably mounted in the recess with the rear face held in contact with the bottom face in such a manner that one of the main cutting edges is indexed in a cutting position.

Abstract: An insert cutter includes a cutter body of a generally circular cross-section having an axis of rotation therethrough. The cutter also includes a plurality of cutter inserts releasably mounted on a periphery of the cutter body in circumferentially spaced relation to one another. Each of the cutter inserts has a main cutting edge indexed in its peripheral cutting position. The cutter inserts are disposed so that the indexed main cutting edge of at least one of the cutter inserts is provided with an axial rake angle different from axial rake angles of the indexed main cutting edges of the other cutter 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 circular saw having dual chip cutting action in which all of the saw teeth are of like width and radial height and have similar tooth geometry with the working surface of the leading tooth face disposed at a negative rake angle and having side portions extending outwardly and rearwardly from a central portion at a negative angle to the side faces of the tooth. A single notch is formed in the top face of each tooth and intersects the working surface, and the notch in alternate ones of the saw teeth are disposed at one side of the central plane of the saw body and the notch in the other alternate ones of the saw teeth are disposed at the other side of the central plane of the saw body.

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.