Abstract: A bandsaw blade comprises a plurality of cutting teeth spaced longitudinally apart by gullets. Each tooth includes a steel portion and a carbide tip brazed to a front face of the steel portion. The deepest point of the gullet lies on a curved section having a relatively large radius of curvature, and is spaced longitudinally forwardly of the trailing carbide tip by a relatively large distance. Transversely spaced corners of the gullet bottom are made smoothly rounded by a shot-peening operation.

Abstract: A two-tier groove cutting circular saw blade includes a circular middle core having sectors defined about the periphery, a pair of side cores disposed adjacent opposite surfaces of the middle core and having lands defined about their outer peripheries, and pluralities of outer and inner cutting segments are secured to the respective middle core sectors and side core lands. Each side core is smaller in diameter than the middle core such that the side core lands and inner cutting segments secured thereon are displaced radially inwardly from the middle core sectors and outer cutting segments secured thereon, thereby adapting the blade for cutting a narrow lower tier and a wider upper tier of the two-tier groove. The blade also includes core anti-undercut features provided on the middle and side cores at predetermined locations thereon for defining exit paths for flow of material particles generated from the cutting of the groove and flushing of the groove by fluid coolant.

Abstract: Apparatus for the grinding of a profile of a band saw, which apparatus is provided with an abrasive medium disposed above a track along which the band saw is conducted under operating conditions and whereby a relative motion between the band saw and the abrasive medium can be effected in the plane of the bank saw for the grinding of individual consecutive parts of the profile of the band saw, in which the abrasive medium substantially consist of an endless grinding belt which can circulate continuously in the plane of the band saw over at least one pressure pulley and which can effect its whetting action while moving in the longitudinal direction over a specific part of the band-saw profile during at least one part of the said motion in the plane of the band saw.

Abstract: A combination saw regrinder for a circular saw blade includes a side grinding assembly for sharpening the side facing portions of a first saw tooth and a top grinding assembly for sharpening the top portions of a second saw tooth comprises a synchronized actuator assembly for carrying out both sharpening operations at opposite radial ends of the saw blade during a single grinding cycle.

Abstract: A guide bar for a chain saw is preincised so as to form the tip for the chain. The preincised guide bar is placed in a mold having a recess conforming to the curved tip. The space formed by the recess is then filled with a powdery wear-proof material, which is heated and melted so as to weld with the guide bar.

Abstract: A method is shown for manufacturing a sheet metal tool from a metal blank in which a predetermined pattern of etching resistant material is applied to the back surface of the metal blank to define exposed areas separated by resist areas. A layer of etching resistant material is also applied to the front surface of the metal blank which overlies at least the exposed areas on the back surface of the metal blank. The exposed areas on the back surface are then subjected to etching treatment through the exposed areas to form a tooth shape with a cutting edge. The etching treatment is applied solely from the back surface of the metal blank, whereby the cutting edge is so formed terminate in sharpened surfaces in the plane of the front surface, protected by the layer of the etching resistant material on the front surface of the metal blank.

Abstract: Apparatus for securing hard material tips to the teeth of a cutter tool includes a carrier unit for presenting an end of a rod of the tip forming material to a tooth to be tipped, a spring for exerting pressure between the tip forming material and the tooth to be tipped during a welding operation such that the end can be welded to the tooth with the tip forming length positioned with respect to the tooth at substantially the rake angle for the tip. Following the welding operation the rod or bar is severed from the end thereof attached to the blade tooth in such manner that the cut surface defines the top face of the tip.The carrier unit brings the lower end of the bar into contact with the tooth that is located at the welding station to hold the lower end in place during the welding operation.

Abstract: An automatic dual-side saw blade grinding machine includes a common actuator to advance the saw blade to place subsequent teeth in position for grinding and to clamp the saw blade to prevent side-by-side movement during grinding. Thus, no adjustment is required to synchronize the timing between blade rotation and clamping. The actuator is a double-acting two-sided pneumatic piston cylinder which has one end attached directly to the clamping mechanism and the other end attached to the spindle that carries the saw blade through a push-pull cable and a linkage that converts linear motion to rotary motion. The linkage is adjustable to accommodate saw blades having different tooth spacing. The piston cylinder is actuated by an air valve that is cycled by a cam driven by the motor that cycles the blade grinding wheels. Accordingly, machine speed can be changed simply by changing the motor speed.

Abstract: Wear-resistant tips, preferably comprising preformed pellets of Stellite in square configuration, are welded, cooled and subsequently annealed to a saw tooth at a single machine station in rapid succession. A head assembly manipulates the individual pellets and positions them properly on the saw blade for forging thereto. The square configuration of the pellets permits their reliable manipulation and orientation by the automated equipment. The duration of the pellet welding phase is determined by the displacement of the pellet into the saw blade, rather than by reliance on a predetermined time period. After cooling, the annealing is accomplished by using the same electrical power supply as is employed for the welding. The duty cycle of this power supply, however, is regulated to produce the amount of annealing heat required for the particular steel being worked.

Abstract: A top and face grinder for a circular saw blade including an indexing apparatus which interposes a stop into the path of the teeth of the saw blade from a position laterally displaced from the plane of the saw blade. This stops rotation of the blade and permits a grinding operation to take place. At the end of the grinding operation the stop is retracted to permit continued rotation of the saw blade. The grinding stroke position of the grinding wheel is adjusted by rotating a cam which passes through the fulcrum of a rocker arm providing reciprocal motion for the grinding wheel.

Abstract: Saws are made by grinding teeth in an edge of a continuously advanced steel strip. The grinding is performed by abrasive members mounted on a frame which is oscillated in an endless path within a plane parallel to a plane of the strip so that the abrasive members intermittently contact the edge.

Abstract: A rotary blade has a rotary substrate with chips disposed about the outer edge of the substrate. The substrate further has two sets of semicircular slits. The first set of semicircular slits is disposed annularly about the rotary substrate on a circle coaxial with the center of rotation of the rotary blade. The semicircular slits open toward the center of rotation. The second set of semicircular slits are disposed on a circle inside of the circle of first slits. These slits open outwardly, thus blocking, at least partially, the first semicircular slits from the center of rotation. A filler material is filled into the semicircular slits, the slits thus providing a vibration damping effect. The chips may be attached to the outer edge of the rotary substrate by concave profiled cassette stands.

Abstract: There is provided a length of material from which may be cut tips for use with tools involving tips of material that is harder than that of the remainder of a tool, wherein said length of material is so preformed as to present at least one axially extending planar surface (17-25) which when a tip forming length (9) is cut therefrom and the tip forming length is mounted to a tool (4), lies substantially at the required operational angle for one of the faces of the tip that is to be involved with the cutting action thereof.

Abstract: A method of mounting cutters (3) or the like of high-alloy tool steel on a tool supporting member of metallic material, especially on the master disk (2) of a circular saw blade (1) or the supporting band of a ribbon for a band saw, by providing intermediate pieces between supporting member and cutters, in which the cutters (3) of high-alloy tool steel are initially welded individually and in soft or non-hardened condition onto an intermediate piece (4), and in which subsequently the intermediate piece (4) including the cutter (3) is subjected to heat treatment to harden the cutter (3) and simultaneously temper the intermediate piece (4), whereafter the intermediate piece (4) with the cutter (3) is welded onto the supporting member (2). Tools made in accordance with such a method are therefore distinguished by cutters (3), of high-alloy tool steel which are welded via an intermediate piece (4) to a tool supporting member (e.g. the master disk (2) of a circular saw blade (1)).

Abstract: A method to be used for adjusting the radial deviation from the true runn position of the internal cutting edge of annular saw blades and an apparatus for carrying out the method. For this purpose, the radial deviation or out-of-true is first measured as a function of position. Subsequently, the saw blade is stretched as a function of position in a defined manner in order to compensate for the deviations from the specified value of the radial out-of-true as a function of position. The measuring and tensioning cycles are continued until the deviation from the specified value no longer exceeds a predetermined tolerance limit. Saw blades adjusted in this manner are characterized by long service lives and high cutting accuracy.

Abstract: Wear-resistant tips, preferably comprising preformed pellets of stellite in square configuration, are welded, cooled and subsequently annealed to a saw tooth at a single machine station in rapid succession. A head assembly manipulates the individual pellets and positions them properly on the saw blade for forging thereto. The square configuration of the pellets permits their reliable manipulation and orientation by the automated equipment. The duration of the pellet welding phase is determined by the displacement of the pellet into the saw blade, rather than by reliance on a predetermined time period. After cooling, the annealing is accomplished by using the same electrical power supply as is employed for the welding. The duty cycle of this power supply, however, is regulated to produce the amount of annealing heat required for the particular steel being worked.

Abstract: A super abrasive cutting saw includes a cutting saw plate formed with concave sections in spaced relation around its periphery. The concave sections alternate with convex sections. Each successive convex section is bent outward toward the opposite surface of the cutting saw plate from the next convex section. A sinter is bonded to the periphery of the cutting saw blade by heating two bodies of a compressed powder formed of material which includes super abrasives and pressing them on the saw plate to be sintered there. Concave and convex portions of the two bodies are formed fused so that the convexities of each oppose the concavities of the other. The border thus formed is extended in zigzag fashion in the direction of thickness of the cutting saw plate corresponding to concave and convex sections thereof. The concave sections of the periphery of the cutting saw plate are deep enough and the inner rim of the sinter is placed for defining holes through the plate for plate cooling and air turbulence generation.

Abstract: A novel saw is disclosed having novel dimensions and tooth pattern for the saw to cut efficiently through bone and wood. The saw includes a plurality of teeth disposed upon the cutting edge of the saw blades. The teeth are set with a bevel of about 3.degree. to 15.degree. and with two steps of about 1/4 to 1/8 inch and with a spacing of tip-to-tip between continguous teeth of about 1/8 to 3/8 inch. The blade is selected of material having dimension and hardness for the blade to yield to bend in a generally semicircular bend.

Abstract: A chain saw sharpening guide is comprised of a relatively thick rigid and rugged plate metal member which has a threaded bore to receive a micrometer-type height adjustment screw to give an accurate indication of the raker (also called depth gauge) tooth on the chain. The metal plate member is elongated and has a length spanning at least the distance between at least three consecutive teeth on the chain saw. A cut-out or notch formed on one long side of the plate member permits the plate to rest on two consecutive teeth on the same side of the chain saw with the intervening tooth on the opposite side projecting upwardly into the notch or cut-out space so that the measurements of depth of cuts skips the tooth on the opposite side of the chain and uses for the depth gauge measurement the two teeth on the same side of the chain. A sunburst angle gauge from 0 to 35 degrees (in 5 degree increment) for either the left or right tooth angles is formed in the top surface.

Abstract: A plate-like rotary body such as a circular saw has zigzag slits formed in the outer peripheral area or spanning the outer and middle peripheral areas such that the resulting protruding sections on both sides of each slit are elongated and deformed within its plane so as to touch the adjacent protruding section from opposite side, thereby providing frictional resistance to suppress vibrations of the body when it rotates. Such slits are preferably formed by a high-energy beam such as a laser beam or an electron beam for efficiency.

Abstract: A bandsaw blade including a continuous loop of hardened tempered bandsaw steel having carbide-tipped teeth arranged in pairs, each pair including a "high" tooth and a "low" tooth shaped to provide triple-chip cutting action and ground to provide radial and tangential relief angles on side surfaces of each saw tooth to reduce blade vibration during cutting. The teeth are secured to the blade body by brazing with a solder which includes a discrete layer of a ductile metal which absorbs forces induced in the brazing zone under dynamic load conditions.

Abstract: A shearing wheel, and a method of assembling the same, having an annular carrier and having a plurality of arcuate segments side mounted to a segment receiving surface of the annular carrier. The arcuate segments are laid in an end-to-end fashion to form an annulus with the outside diameter of the annulus having a radial extent greater than the radial extent of the annular carrier. A support shoulder extends axially outward from the annular carrier to contact the surface of the arcuate segments defined by the inside diameter of the annulus. The arcuate segments may be removed and sharpened, whereafter shims are inserted between the arcuate segments and the annular carrier to properly space the segments from an adjacent shearing wheel. Optionally, arcuate segments may be mounted to both side faces of the annular carrier.

Abstract: The present invention is a rotary machining tool and a method of making it using an easily replaceable cutter element assembly. A circular saw is exemplary of a cutting tool which can be made using the present invention. The cutter element assembly comprises two portions. The first is an inverted, generally U-shaped clevis with spaced apart side portions that fit over the circumferential edge of a sawplate. The clevis has an upper portion which extends outwardly from the sawplate edge thereby defining a tooth retaining socket between the sawplate edge and the clevis. The side portions of the clevis are apertured to accept a pin for attachment to the sawplate which has a corresponding aperture. A buttress attached to the clevis normally bears against the leading edge of a gullet and prevents rearward rotation when in use. The second member is an insertable tooth having a head and an elongated tapered shank. The shank has a taper on its upper surface sufficient to form a self-releasing taper, usually between 3.

Abstract: A method of attaching segments to the body of a cutting tool, such as a diamond saw blade, is initiated by inseparably coupling the segments to their respective interposed members by sintering. The interposed members are made of iron, cobalt, or other metal. Then, the interposed members are rigidly coupled to the body by welding or other method.

Abstract: A Gigli saw used by a surgeon to cut bones is constructed of a plurality of round wires which have been deformed in a coining stand so that they form one polygonal shape which in the preferred embodiment is square. This square strand is then twisted along its own axis in a given direction of lay. It is then heat-treated for stress relief and a plurality, such as three, of such strands are twisted together to form a cable. This results in a Gigli saw blade with many cutting edges formed at the edges of the polygon as each such edge is presented at the periphery of the cable. Preferably, the strands have a different number of twists from that of the cable, and are twisted in the opposite direction so that the cutting edges lie at about 5 to 15 degrees relative to the longitudinal axis of the cable.

Abstract: An improvement in the structure of a circular knife including a novel method of making its peripheral cutting edges by reducing the number of operations required to produce the knife. Previously, as presently known, the peripheral cutting edges of circular knives involves the expense of individually cutting material out of a peripheral area as compared to the unique method of the subject disclosure which simultaneously shears and forms offset portions and radial portions, and wherein the outer knife ends of these portions are simutlaneously sharpened by a common bevel which causes the edges of the sharpened ends of the offset portions to be inset with reference to the sharpened ends of the radial portions. These two significant factors in the manfacture of circular knives constitute a meritorious advance in the art.

Abstract: A method and device for continuously grinding the teeth of a number of adjacent saw bands using a rotating grinding wheel which is reciprocatingly moveable in a direction transverse to the longitudinal direction of the saw bands. The method comprising lowering the grinding wheel at the start of each reciprocating grinding movement a predetermined distance which corresponds to wear the grinding wheel experienced in the prior grinding cycle. As the grinding wheel is moved towards the band material, it is acted on by a stationary abrasing wheel which reshapes the grinding wheel. During the return stroke of the grinding wheel the saw band blanks are advanced and repositioned for another cycle of the grinding wheel.

Abstract: A circular saw blade (20) includes a circular body (22) with a plurality of equally spaced teeth (32) and a corresponding plurality of gullets (34) formed integrally with and about the periphery of the body. Each alternate tooth (32) of a first set of alternating teeth has mounted thereon a carbide tip (36) with a cutting point (60) on the right side of the blade (20). Each of the remaining teeth (32) form a second set of alternating teeth and has mounted thereon a carbide tip (38) with a cutting point 72 on the left side of the blade (20). Each of the carbide tips (36) and (38) is formed with a converse front face (42), top bevel angle, side clearance angles and a front bevel angle.

Abstract: In view of the production of saw blades, a continuous sheet metal strip first runs through a hardening surface. Subsequently, the teeth are ground by a grinder. Thereafter, the sheet metal strip is passed through a grinder comprising two parallel grinding wheels to process by the grinding wheel end sides the sides of the sheet metal strip. The outer ends of the laterally projecting teeth are worked by another grinder. After such a treatment of the sheet metal strips, saw blades are formed by cutting off individual length sections.

Abstract: A saw has a plurality of generally V-shaped teeth formed by punching. The sides of each tooth define cutting edges. A bevel extends along each cutting edge. The bevels are formed by punching with a tool having a surface oriented non-perpendicular to the saw blank. Burrs formed during the punching step are not removed, but are allowed to remain to enhance the cutting ability of the teeth.

Abstract: A saw has a plurality of generally V-shaped teeth formed by punching. The sides of each tooth define cutting edges. A bevel extends along each cutting edge. The bevels are formed by punching with a tool having a surface oriented non-perpendicular to the saw blank. Burrs formed during the punching step are not removed, but are allowed to remain to enhance the cutting ability of the teeth.

Abstract: A pair of companion saw blade tooth set dies are provided for guided relative movement toward and away from each other relative to a support structure from which a saw blade may be guidingly supported for predetermined indexed positioning of right and left set teeth thereon relative to the location of the aforementioned companion tooth set dies. The dies, when moved into engagement with the right and left set teeth of the saw blade, are operative to engage and bend the right and the left set teeth back to and past neutral set positions and to the reverse set positions with the previous right and left set teeth comprising left and right set teeth, respectively, and the bend areas of the reverse set teeth being formed in the longitudinal marginal portion of the blade from which the teeth project.

Abstract: A machine to deform the gullets of saw blades, thereby increasing the resistance of the saw blade to fatigue cracks, by compressing the gullet bottom, the compression being accomplished by pressing the saw blade between one fixed die and one which is pressed upon by a threaded member, said member being turned a part of a turn, thereby moving axially, by being attached to a lever arm, which is lifted and pressed down by a piston, and comprising a mechanism for advancing the saw blade one tooth pitch after each compressing cycle.

Abstract: A machine tool, typically a band saw, has a support carrier or carriage for bearings to journal saw band pulleys, guide attachment elements for saw band guides, attachment elements for a motor, and coupling elements to couple a feeding arrangement to the carrier or carriage; in accordance with the invention, the carrier or carriage is a cast structure essentially and primarily consisting of concrete polymer, into which the respective bearings and attachment elements are cast. The bearings and attchment elements may be formed as metal or plastic plates, sleeves cast into the concrete polymer and the like.

Abstract: A mechanical drive assembly that is particularly useful for moving a sharpening stone into engagement with a sharpenable chain saw is mounted to the side plate of the chain saw housing. The stone moves linearly a predetermined stroke length toward and away from the chain, and the beginning position thereof is incrementally adjustable, to take into account wear of the stone. The stone may be returned to an original position, for replacement, in another distinct mode of operation.

Abstract: Wear-resistant and shock-resistant tools are constructed by preforming carbide-containing working parts of high wear resistance and hardness and attaching them to a softer base metal of the tool by means of a highly shock-resistant steel-to-steel fusion weld. The working part is preformed by powdered metallurgy techniques utilizing steel powders having carbide-forming constituents therein which form carbides along the grain boundaries of the steel uniformly throughout the working part as a result of sintering of the compressed powders. Thereafter the fusion welding process renders the carbide structure of the working part nonuniform for optimum shock resistance, without reducing the effective wear resistance thereof, while also forming a highly shock-resistance joint between the working part and the base metal of the tool.

Abstract: An apparatus for profile-forming saw teeth, a carriage to which a saw blade to be toothed is affixed for feeding longitudinally and transversely with respect to a cutter blade. The carriage is horizontally rotatable about a cutting position of a cutter blade as a center of rotation and a tooth angle changing mechanism gradually moves the carriage to a predetermined angle at feed positions according to the timing of the longitudinal and transverse feed mechanism, thereby shaping saw teeth.

Abstract: Metallic wire card clothing is provided having a sharpened leading edge on each of the longitudinally aligned teeth formed in a metallic strip by an apparatus which includes a punch. During punching, the relative direction of travel of the punch is illustrated as inclined at an acute angle in relation to the moving strip and a die cooperating therewith. The method contemplates thus inclining the strip and while the strip is so inclined, punching the teeth as the strip is continuously fed past the die. The strip may be inclined in respect to the direction of travel of the punch either transversely or longitudinally, preferably, both.

Abstract: An apparatus for producing tempered plate spare parts, planar shaped products, shear platus, blades cut from band material, and particularly ampule files, comprises a band hobbing and feeding unit, in certain cases a mechanical forming unit, particularly a serrating and/or sharpening unit, a heating and cooling unit and a cutting mechanism. The apparatus is equipped with a cutting-cooling mechanism arranged on a cross slide that can alternately be displaced crosswise to the transfer trace of the band material and it is provided with pairs of cutting tools arranged in two parallel or approximately parallel--expediently flat--clamp plates that can be pressed to one another.

Abstract: An apparatus for forming a saw blade or saw band by forming saw teeth in a solid stock moving continuously in a longitudinal direction includes a grinding wheel mounted for rotation about an axis which is inclined at an acute angle to and which diverges from the direction of movement of the stock. The grinding wheel has a generally frusto-conical configuration and an outer periphery defined by first and second axially distinct helical grinding ribs having different contours.

Abstract: Disclosed is a blade for a cross-cutting saw that includes a plurality of alternately splayed cutting teeth wherein a certain number of said cutting teeth disposed at various points along the length of the blade are splayed with an angle less than that of the main cutting teeth, such that the less splayed intermediate cutting teeth cut away the ridge that is formed laterally between the main cutting teeth, to cut a kerf with a substantially flat bottom that does not unduly resist the action of the saw. Also disclosed is a method of manufacturing the blade of the present invention by splaying alternately all the teeth by a substantially uniform angle to the central plane of the blade, machining the edges of the teeth to provide a suitable cutting edge, and then pushing back the teeth designated as intermediate auxiliary cutting teeth so that they are splayed by a smaller angle than the remaining main cutting teeth.

Abstract: A method and apparatus for automatically facing saws is described in which a saw blade is held over a spindle by a pair of electromagnets. A pawl engages successive gullets between saw blade teeth in order to index the saw blade. A grinding head mounted on a carrier then moves into engagement with the indexed saw blade until the carrier reaches a limit. Separate hydraulic actuators are used for the pawl and the grinding head carrier so that a sequence of operation can be maintained. The apparatus is adjustable and a counter is provided to automate the sequencing operation. By indexing the saw blade with the pawl, using the electromagnets to hold the saw blade and automatically sequencing the operation, saw blades with irregular tooth patterns and strobe saws having deep-cut rakers extending toward the center of the blade can be automatically faced. A sequence programmer, responsive to a plurality of sensors, controls sequencing of operations of the pawl and grinding head.

Abstract: A method for the repair of alloy-tipped saw blades is disclosed. According to the method, a damaged circular saw blade can be completely repaired at one location. The saw blade is clamped in the machine. Brazing and grinding tools are positioned for repair of the clamped saw blades.

Abstract: The article, such as a circular saw tool or a gear wheel, has a visco-elastic synthetic-resin damping layer between, on the one hand, a portion of the body of the article which is integral with, or securely attached to, a work region adapted to interact with another article, and, on the other hand, a counter-element which extends parallel thereto. The damping layer is arranged in the interior of the article in a region covered by an outer member integral with or securely connected to the body. The parts between which the damping layer lies are connected together by the damping layer in a manner which permits shear stresses to occur in the damping layer.

Abstract: A portable chain saw sharpening kit comprises a sharpener body in the form of an inverted U-shaped channel-defining member adapted to be placed over the bar of a chain saw, a rotary burr with a tapered abradant end portion which is receivable in a selected one of two horizontal guide bores provided in the sharpener body, and an alignment pin which is likewise receivable in a selected one of the two guide bores. The alignment pin comprises a shank portion and a reduced end portion, the latter providing an abutment surface for positioning a cutting link within the sharpener body channel in the proper position for sharpening. The shank portion and reduced end portion of the alignment pin are preferably cylindrical and have different diameters, with the reduced end portion being eccentrically offset from the shank portion and having a diameter substantially equal to the widest diameter of the tapered abradent end portion of the rotary burr.

Abstract: An attachment is provided for allowing a chain saw sharpener to be used for filing the depth gauge portions of the cutting links on the saw chain. The sharpener is of the type comprising a sharpener body in the form of an inverted U-shaped channel-defining member adapted to be placed over the bar of a chain saw, and a rotary burr with an abradant end portion which is receivable in a selected one of two horizontal guide bores provided in the sharpener body. The depth gauge attachment comprises an elongated gauge bar and means for removably affixing the gauge bar within the upper portion of the sharpener body channel so that the gauge bar occupies only a portion of the channel length.

Abstract: An improved band saw blade for crafting the interior of a workpiece without defacing its periphery. A planar blade is provided having mating ends. Means located in the mating ends of the blade allow the blade to be threaded through the interior of the workpiece then joined to achieve a belt-like operational configuration.

Abstract: A machine for the repair of alloy-tipped saw blades is provided. According to the invention, a damaged circular saw blade can be completely repaired at one location. The saw blade is clamped in the machine. Brazing and grinding tools are positioned for repair of the clamped saw blades.

Abstract: A machine forming teeth about the periphery of a round blank which has two faces at an angle to each other, and a peripheral edge. The teeth are to appear at both faces and the edge. A single rotary tooth cutter is given a single path to cut each tooth and is controlled by a template to cut one side face, the edge, and the other side face seriatim in one continuous pass. A cam is used to impel the cutter and its drive shaft along its path.

Abstract: An attachment is provided which includes a support member of L-shaped cross section having a first aperture in one leg through which a grinding wheel may extend and a second aperture in the other leg for receiving the shaft of the grinding wheel. An adjustably mounted plate having a third aperture therein is secured to the second leg and arranged to be brought into spaced relation to the first leg so that the first leg and the plate may ride along the opposite faces of the chain saw bar for effectively guiding the attachment and a grinding wheel mounted thereon along the edge of the bar. To effect grinding of the face of the chain saw bar the same attachment is employed but is positioned so that the plate rides along the edge of the chain saw bar to provide an effective guide. In addition the first and third apertures are shaped for receiving and firmly holding a file for filing the edge of the chain saw bar as the attachment is moved along the bar.