Abstract: An improved saw blade is disclosed that includes a high precision finish on the blade for providing a low friction surface. Preferably the surface finish is less than approximately 10 Ra. The low friction surface allows for a thinner cutting tip relative to the blade. A method for forming a saw blade having a high precision surface finish. The method involves providing a high speed centrifugal finishing apparatus having an outer vessel and at least one inner vessel. A plurality of saw blades are mounted into the inner vessel, each saw blade being spaced apart from an adjacent saw blade. An abrasive finishing media is added into the inner vessel. The inner vessel is then rotated at high speed relative to the outer vessel. The high speed rotation causes the abrasive media to surface finish the blades. The finished saw blades are then removed from the inner vessel.

Abstract: A vibration absorbing reed forming process for a piece of sheet metal having a planar surface comprising the steps of cutting a predetermined number of tabs in the piece of sheet metal with a first stamp, aligning the tabs in coplanar fashion with the planar surface with a second stamp, and forming a rib in the tabs by drawing the metal toward the centers of the tabs a predetermined distance thereby creating a gap between the tabs and the piece of sheet metal.

Abstract: A handsaw capable of cutting a glass bottle includes a band-like handsaw substrate which is obtained by cutting a steel strip at a predetermined length, a blade portion of hard abrasive applied, by deposition, to at least one edge of the band-like handsaw substrate in the width direction, and a grip portion which allows the band-like handsaw substrate to be manually held. A method for manufacturing a handsaw capable of cutting a glass bottle, and a method for reusing empty wine bottles are also disclosed.

Abstract: In a method of producing saw bands and saw blades with improved dimensional and setting stability, a supporting band (2) with 0.2 to 0.6% carbon, 0.5 to 6.0% chromium and up to 3.5% tungsten, molybdenum and vanadium—individually or in addition to one another—the remainder being iron, is welded to a cutting band (3) of a high-speed steel and the weld (4) is thereby adjusted to a ratio of its average width to the thickness of the band or blade of 0.30 to 0.9.

Abstract: A new saw blade and a method of manufacturing such a saw blade are disclosed. The saw blade is made from a hardenable steel sheet in one piece and comprises a plain cutting blade from which a cranked mounting part, having a central mounting opening, protrudes. To manufacture such saw blades, blanks are cut out from a hardenable steel sheet and subsequently deep-drawn to provide the cranked mounting part. The mounting openings may be produced by stamping, thereafter. A plurality of such blanks is stacked over each other and clamped in a fixture, subsequently annealed for recrystallization and austenization and quenched thereafter, to harden the blanks. Finally, saw teeth are provided along the outer edges of the cutting blades.

Abstract: A metalcutting tool, such as a band saw blade, is formed by providing a body having at least one tooth, the tooth including a cutting tip having a rake face, a clearance face intersecting the rake face to form a main cutting edge therewith, and a pair of side faces intersecting the rake face to form respective side cutting edges therewith. The main cutting edge and the side cutting edges are subjected to an abrasive rounding operation, and the side cutting edges are thereafter ground to remove any roundness produced therein during the rounding operation.

Abstract: Solid carbide segments are brazed to the rim of a steel body and then teeth are ground into them. This allows more teeth/inch on the perimeter and larger diameter blades than on previous carbide-tipped blades. The segments, which typically form an arc of a circle, provide the improved performance of carbide blades without excessive expense of solid carbide blades.

Abstract: A process for making a cutting instrument includes cutting a blank from a plate or strip of Type 60 Nitinol, having a thickness of between 0.005″-0.500″ using an abrasive waterjet, wire electron discharge machining or laser cutting, and grinding top and bottom surfaces of the blank by rotating a grinder having cubic boron nitride or diamond abrasive particles on a cutting surface of said grinder against the knife blank at a surface speed of about 5000 to 7000 surface feet per minute and grinding to a depth of about 0.001 to 0.005 inches per pass to remove material along the blade surface. The surface of the blade is polished to a surface finish smoother than 20 microinches RMS using Turkish emery abrasive grinding/polishing materials on a buffing wheel driven by a high power motor. The blade is then finish polished to a mirror-like luster of 2 microinches RMS or less using a fine diamond buffing compound and a buffing wheel running at about 3000 RPM.

Abstract: A method of automatically cutting a variable tooth pitch band saw blade from a bulk reel 40 of blade material 14 is achieved by using a cut to length machine 8. Blade material 14 from the bulk reel 40 is pulled on to a bed 42 of the machine 8. The blade material 14 is placed between rollers 50, which are powered and one of which is a metered roller 44 actuable to dispense a desired amount of the blade material. The cut to length machine 8 includes a cutting section 18 and an optical sensor 24, both connected to and controlled by a computer 46. The cutting section 18 comprises suitable cutting means, such as a mechanical cutter or laser cutter.

Abstract: A window assembly for a power tool has a glass plate with an upper surface, a lower surface, and a peripheral edge. The plate is configured to generally cover an aperture formed in the upper saw guard of the power tool. A plastic layer having a peripheral edge is positioned on the upper surface of the glass plate. A frame engages the peripheral edge of the glass plate and the peripheral edge of the plastic layer. The frame is adapted to be attached to the guard so that the window covers the aperture and allows viewing of the cutting tool by the power tool operator.

Abstract: The present invention relates to hacksaws. One aspect of the invention relates to a hacksaw with an overmolded frame member wherein the overmolded material has an I-beam configuration. Another aspect of the invention relates to an improved blade tensioning device that reduces the tension load borne by the tensioning device's mounting structure. Another aspect of the invention relates to a method for cutting metal frame members with a reduced amount of scrap.

Abstract: The description relates to a procedure for fastening a carbide tooth (1) at a saw blade (2), with a carbide tooth (1) fabricated according to the saw tooth geometry being held butt-jointed to the prepared front-side abutting surface (3) of the saw blade (2) and then being attached to the saw blade under addition of heat along the joint (10) between the saw blade (2) and the carbide tooth (1). To create favorable process conditions it is suggested that the carbide tooth (1) is welded to the saw blade (2) by means a focal spot (9) of a laser beam (7) extending over the whole joint length.

Abstract: The invention relates to a method for attaching tooth bits to a saw blade body. The mating surface (8) of an attachment point provided in the blade body, transverse to the blade's direction of motion (A), is formed such that it is rearwardly oblique at its outermost part, whereby the blade body (4) may bypass a broken tooth bit fragment (5) without being damaged. A discontinuity point, at which the tooth bit (2) fractures controllably, may also be formed in the tooth bit (2). The invention further relates to an arrangement for attaching the tooth bits (2) to the blade body (4) used in sawing. In the arrangement, the outermost part of the mating surface (8) supporting the tooth bit (2) is formed to be rearwardly oblique and the tooth bit (2) has a given protrusion (10) with respect to the blade body (4), with the result that the blade body (4) may bypass the tooth bit fragment (5) without breakage.

Abstract: To improve the properties of all-steel card clothings, a saw-toothed wire is proposed with a foot portion and a plurality of teeth arranged consecutively in the lengthwise direction of the wire, the teeth issuing from the foot portion and each tooth ending in a single point, and where the interval between the points of two consecutive teeth is different from the interval between the points of other consecutive teeth.

Abstract: A blade sharpener for band saws used in the lumber and other wood processing industries, is installed on the band saw structure for sharpening the band saw blade periodically as required without need to remove the blade from the saw. The sharpener apparatus is retractable within the band saw frame when not in use, permitting the saw to be used normally. When the blade requires sharpening, the apparatus is extended and clamped about the blade. The blade is advanced to the proper position, and the sharpener is actuated to sharpen each of the teeth of the band saw blade in place on the saw. The mechanism includes an automatic shutoff to preclude further sharpening operation once the blade has been advanced through a full cycle and all teeth have been sharpened. The sharpener also includes adjustments for tooth pitch, hook angle, and tooth or gullet depth, enabling the device to be useable for sharpening virtually any band saw blade configuration.

Abstract: A method of making a cutting blade using a fiber composite tape formed into a continuous closed loop. The tape is selected and prepared such that at least some of the fibers form an acute angle with the cutting edge.

Abstract: The invention relates to a method for assembling a guide bar having a guide groove for a saw chain of a motor-driven chain saw. The guide groove extends along the periphery of the guide bar. The guide bar includes two parallel mutually adjacent side parts and individual spacers arranged between the side parts. The spacers hold the side parts at a spacing corresponding to the groove width. The side parts as well as the spacers are inseparably joined to each other at individual attachment points. A spacer is arranged at each attachment point. The spacers are fixed to a common carrier to obtain a light guide bar accurate with respect to size. The carrier is removed after the side parts are joined.

Abstract: A band saw blade tensioning machine with a tensioning station for rolling tension into the band saw blade and a measuring station disposed above the saw blade for recording the curvature across the band saw blade while this is travelling freely from an elevated point to the measuring site. Rollers are disposed opposite each other with curved surfaces and a device for simultaneously pressing the rollers against the upper and lower side of the band saw blade to roll tension into the blade.

Abstract: A carbide-tipped circular saw blade is formed by brazing cutting tips of tungsten carbide to the teeth of a steel blade blank, thereby creating discoloration on the planar surfaces of the blade adjacent the rim. Substantially the entire surface of the blade is sandblasted with blast media to remove the discoloration while generating a substantially uniform coloration and texture to the planar surfaces of the blade. User-readable graphics are overprinted upon the blasted surface. The graphics and the surface appearance of the blasted area are selected to be at a predetermined contrast, and the carbide cutting tips retain a visual appearance different from the rest of the blade, such that the graphics and cutting tips are visually perceptible to a potential purchaser at the blade's point of sale. The saw blade surfaces are sandblasted by jets directed at both sides of the saw blade. The blast nozzles are oriented such that the vertical components of force of the jets offset one another.

Abstract: This invention concerns a saw blade (S) including at least one part with fine teeth (6) and at least one part with grouped teeth (7). The part of the blade with grouped teeth (7) includes a number of groups (4) of, for example, V-shaped indentations (10) in the blade (S), each pair of indentations defining a saw tooth (1). Each group (4) comprises an even number of indentations. In an arbitrary group (e.g. indentations one, three, five, etc.) a first imaginary line A), drawn between alternate tips (11) or base, is a straight line which forms a small angle (a) in relation to the longitudinal direction of the saw blade, the tips or bases being evenly distributed along the line. The invention also concerns a method and a device for producing a saw blade with grouped teeth by means of a tool comprising a punch and a punch die. The punch for cutting out the saw teeth is completely symmetrical and has substantially V-shaped tips. A saw blade blank is fed through the tool and cut in at least two stages.

Abstract: A saw blade is stamped with a circumferential edge. At least one gullet and shoulder are formed in the circumferential edge. Likewise, a tooth pocket is formed in the circumferential edge. The tooth pocket is defined by a wall, generally radial to circle, on the shoulder, and a shelf substantially perpendicular to the wall. A tooth is secured, ordinarily by brazing, in the pocket such that a portion of the shelf extends beyond the front face of the tooth towards the gullet so that the tooth can be brazed along its entire lateral edge such that resultant forces in the tooth are transmitted to the body of the blade. After the tooth is positioned into the tooth pocket, the tooth, as well as a projection of the blade shoulder, are ground off so that the tooth and shoulder are flush with one another. Thus, the tooth longitudinal edge is in complete contact with the shoulder wall maximizing its strength.

Abstract: To increase the wear resistance of the nose of a chain saw guide bar, a U-shaped strip of wear-resistant alloy is welded to the edge surface of each side rail of the guide bar at the nose. Each strip has a greater width at the crest of the strip than at the ends thereof. The strips are formed by making identical curved cuts through a plate formed of the alloy, whereby each cut forms a wave-shaped element comprising at least two U-shaped strips that are joined end-to-end. The individual strips of the element are severed from one another before being welded to the respective side rails. The strips could be formed of cobalt-chrome-tungsten alloy, and thermally age-hardened, prior to being welded onto the side rail.

Abstract: A saw blade has a plurality of teeth with each tooth formed by a beveled gullet forming a trailing face, a beveled gullet forming a leading face and a planar surface forming a curved cutting face. The gullets forming the trailing face and the leading face are beveled in opposite directions. The planar surface is generally parallel to the beveled trailing face. The unique tooth profile provides a saw tooth having a positive rake angle to significantly improve the strength of the tooth. The method of manufacturing of the unique tooth profile begins by orienting a saw blade blank about three axes and performing a first grinding operation which forms every other tooth gullet and every other planar surface. The partially formed blank is then oriented about two of the three axes in an opposite direction and a second grinding operation is performed. The second grinding operation grinds the remaining gullets and planar surfaces.

Abstract: A chain saw guide bar includes outer side surfaces, a longitudinal groove having side walls, and two edge surfaces. Each edge surface interconnects a side wall and an outer side surface to form therewith inner and outer corners, respectively. To edge-harden the guide bar, the edge surfaces, inner corners, and outer corners are heated above 750.degree. C. Then, the edge surfaces and inner corners are rapidly cooled, i.e, quenched, but the outer side surfaces are cooled more slowly, whereby the inner corners are given a higher hardness than the outer corners.

Abstract: A saw blade has a plurality of teeth with each tooth formed by a beveled leading face, a beveled trailing face and a chamfered surface located on the trailing face of each tooth. The trailing and leading faces are beveled in opposite directions in alternate order throughout the saw blade prior to the forming of the chamfered surface. The beveled leading face of each tooth intersects the chamfered surface on the trailing face of each tooth to form a curved cutting edge having a negative rake angle. The beveled faces are manufactured by first forming a plurality of rough-formed gullets. The rough-formed gullets are then finished-formed into beveled gullets by a cold-forming operation prior to the grinding of the chamfered surface to form the curved cutting face of the tooth.

Abstract: A method of making a cutting blade using a fiber composite tape formed into a continuous closed loop. The tape is selected and prepared such that at least some of the fibers form an acute angle with the cutting edge.

Abstract: An abrasive tool for cutting extremely abrasive-resistant materials includes a novel, abrasive segment with a generally crenelated, rectangular appearance. The segment has a single piece vein of a primary abrasive and first bond material extending completely along the length of the segment. The vein transverses the width of the segment at least once in a non-linear path and alternately coincides with inner and outer faces. Gaps between the vein and the faces opposite the vein coincident faces are occupied by a second bond material, and optionally, a secondary abrasive, thus forming multiple, separated abrasive regions. The bottom surface of the segment is attached to a core at an operative perimeter which defines the cutting edge of the tool. The segment can be adapted to conform to the curvature of diverse cutting edges, and thus can be used in rotary and reciprocating saw blades and core drilling bits.

Abstract: A method of and apparatus for handling a band saw for the purposes of effecting manufacturing and/or repair operations upon the band saw characterized by, during such manufacturing and/or repair operations upon the band saw (5), supporting the band saw in such manner that the weight of the band saw (5) is not carried by an edge of the band saw (5). The support includes rotatable supports (24, 25) for supporting the band saw; the rotatable supports being positionally adjustable to accommodate differing band saw lengths; and in that adjustments are provided for enabling the rotatable supports to be displaced to advance the band saw to a machining station (22) for defining a working station/position at which a manufacturing and/or repair operation can be effected.

Abstract: A cutting tool insert includes a cutting tip mounted into a first recess of a molded hard refractory compound insert having a second recess of preselected size and shape for locating the insert to a cutting tool. A preferred cutting tip is a diamond and a preferred hard refractory compound is a tungsten carbide with a cobalt binder.

Abstract: A saw blade has a plurality of teeth with each tooth formed by a beveled leading face, a beveled trailing face and a chamfered surface located on the trailing face of each tooth. The trailing and leading faces are beveled in opposite directions in alternate order throughout the saw blade prior to the forming of the chamfered surface. The beveled leading face of each tooth intersects the chamfered surface on the trailing face of each tooth to form a curved cutting edge having a negative rake angle. The beveled faces are manufactured by first forming a plurality of rough-formed gullets. The rough-formed gullets are then finished-formed into beveled gullets by a cold-forming operation prior to the grinding of the chamfered surface to form the curved cutting face of the tooth.

Abstract: A dual utility hacksaw blade includes additional mounting through holes. The first set of holes (outer) being the mounting holes for the use of the saw as a conventional hacksaw and the second set of holes being initially pilot holes to be enlarged by the end user when the second utility is desired. The method of the invention also recommends enlarging the first set of holes for mounting in the reciprocating saw as the second utility. Additionally, the blade may include construction facilitating breakage of the hacksaw at predetermined areas and in predetermined angles to provide the second utility. The hacksaw may also simply, and preferably, be cut or broken off for the second utility.

Abstract: A saw blade includes a very shallow cone shaped side for supporting an abrasive surface to sand smooth a cut surface of a work piece while the surface is being cut by the saw blade. To maintain the finished sanded surface of the cut perpendicular to a specified axis of the work piece, the axis of rotation of the saw blade is tilted to place a radial of the cone shaped abrasive surface orthogonal in three axis to the direction of saw cut being made.

Abstract: A mounting for use in mounting rotating cutting blades to the drive shaft of saws is provided. The mounting is an arbor or arbor sleeve having a non-symmetrical outer mounting surface onto which is mounted a cutting blade which contains a similarly configured mounting hole. The arbor or arbor sleeve is designed for use with a cutting blade having a mounting hole which, when viewed from one side of the blade is the same as the outer surface mounting surface, and which viewed from the other side of the blade is not the same. The use of the arbor or arbor sleeve of the present invention with a cutting blade having these characteristics results in the blade being mounted on the saw in only one orientation.

Abstract: A high performance, moderate cost bandsaw blade has a unique tooth configuration which enables it to provide high performance, while using standard manufacturing processes and available bandsaw equipment. The bandsaw blade has a straight back edge and a repeating tooth pattern wherein each set tooth, of each repeating tooth pattern has a set which is a monotonically increasing function of the height of the tooth. The height of each tooth in the repeating tooth pattern increases from the first tooth of the pattern to the last tooth of the pattern. The height difference between the beginning and end of a tooth pattern is preferably on the order of ten to twenty-five thousandths of an inch, more preferably between fifteen and twenty thousandths of an inch, and the length of a repeating pattern is typically about six inches to match a standard cutter.

Abstract: A saw blade includes a very shallow cone shaped side for supporting an abrasive surface to sand smooth a cut surface of a work piece while the surface is being cut by the saw blade. To maintain the finished sanded surface of the cut perpendicular to a specified axis of the work piece, the axis of rotation of the saw blade is tilted to place a radial of the cone shaped abrasive surface orthogonal in three axis to the direction of saw cut being made.

Abstract: A device is provided for repairing a broken reciprocating saw blade, which consists of a base with a facility for mounting the base to a work surface. A first station is on the base. An assembly in the first station is for scoring a pattern of a new shank onto an end of the broken saw blade that is inserted into the first station. A second station is on the base. A unit in the second station is for punching out the new shank from the end of the broken saw blade that is inserted into the second station.

Abstract: A method is provided for manufacturing a segmented diamond blade. The method includes the steps of placing a core into a mold and pouring a metal mixture into a mold cavity surrounding the core. The metal mixture is cold pressed to the core to form a blade having a continuous outer rim. Thereafter, the core and outer rim are suspended in a free-sintering furnace which is heated to an initial diffusion bonding temperature. The core and outer rim are heated for an initial bonding time period. Thereafter, the furnace is heated to a final diffusion bonding temperature and the core and outer rim are maintained at this temperature for a final diffusion bonding time period. After the blade cools, it is placed in a cutting tool and segmented. During segmentation, a plurality of radially aligned notches are cut through the outer rim and a corresponding plurality of gullets are cut in the core. During cutting, an inert gas, such as helium, argon or the like, is blown under high pressure directly onto the cutting point.

Abstract: A guide bar for chain saws comprising a bar body made from a solid steel plate with a groove machined along the edges for guiding a saw chain. At least the portion of the groove sides closest to the edges of the bar body are plated with a first material layer of a thickness related to the average surface roughness (Ra) of the groove sidewalls and thereafter are plated with a much thinner second material layer.

Abstract: A cutting tool has cutting teeth attached to a base surface of the cutting tool. Each tooth is provided with a generally vertical leading face that is arranged at an angle relative to a forward stroke direction of the cutting tool, and a corresponding, similarly shaped trailing face relative to said forward stroke direction. Extending between the leading face and the trailing face is at least one cutting surface perpendicular to the leading face. The cutting surface has an elongated, generally linear crest having a length that extends between the leading and trailing faces and is situated at a distance from the base surface. Each leading face forms a piercing corner with the crest. The teeth of the cutting tool are arranged in a plurality of rows, with each row being oriented generally perpendicularly to the forward stroke direction. Each leading face of each tooth of at least one row is oriented at an angle relative to the forward stroke direction.

Abstract: Method for hardfacing of parts of the edges of a chainsaw guide bar, where the chain is guided by a groove, where a wear-resistant alloy is applied in a molten state to parts of the edges (12,13) of a guide bar blank and solidified in nearly final configuration, comprising the steps of:making a guide bar blank (10) having edges located at greater distance from the groove bottom (18) along the sides (17) which are not to be hardfaced than in those parts (12,13) which are to be hardfaced, andapplying a mold (15) with an extending plate (14) against the blank with the edge (23) of the plate in contact with the groove bottom (18), andfilling the space between the wall (19) of the mold and the edges (12,13) of the blank with a paste (16) made from finely powderized hardfacing alloy and a liquid, andheating the paste (16) locally to melt the alloy.

Abstract: A cutting element, cutting edge and method of making cutting edges is disclosed. A compound material, preferably containing 30-70 vol % of carbides, nitrides and/or carbonitfides, is co-extruded with a steel cover. The co-extended product is cut into tip blanks whose outer surface corresponds to surfaces of a cutting element body. The steel cover is brazed to corresponding contact surfaces on bodies of a cutting element, e.g., a saw blade, and the cutting edges are ground by removing portions of the steel cover and the compound material.

Abstract: A method for the production of a slideway-type guide for driven chains such as cutting chains includes the application of a wear-resistant hard metal alloy as a running surface to the slideway of the guide. A bar-shaped blank with a dentritic structure, made from the alloy, is produced to form the running surface, a suction casting process being used in particular for this purpose. The blank is treated by hot isostatic pressing with high pressure at a high temperature. This is followed by an annealing process over a number of hours, at the end of which the structure of the alloy is so altered that the previously acicular and, to some extent, lattice-type carbides are dispersed and converted to rounded and, to some extent, spheroidal bodies which are densely and evenly distributed throughout the alloy. The alloy thereby becomes highly wear-resistant. The bars are then shaped so as to fit onto the slideway, and are fixedly connected thereto.

Abstract: A saw regrinding machine includes a circular saw blade mounted for rotation about an axis and having an indexing assembly. A side clamp secures the blade during a regrinding operation to prevent its movement and includes side clamping members having a clamping surface for frictionally engaging the surface of the saw blade that includes a surface portion formed of a resilient compressible material. During indexing the saw blade slides across the deformable resilient material but is not scratched or scuffed. The invention also provides a resilient compressible material as part of the surface of a slip clutch assembly in the form of O-rings surrounding magnetic members embedded in the surface of a flat plate. While magnetic attraction holds the saw blade in place against the plate, rotation is permitted where only the soft compressible O-rings are in contact with the surface of the saw blade. In this way rotation of the saw blade is accomplished without scratching or scarring its surface.

Abstract: A circular saw blade has a rotary axis and a flat annular body arranged therearound. The annular body has a periphery being provided with teeth. The annular body is of hollow conical shape. For manufacturing the circular saw blade, an initially flat annular body is bolted into a concentric conical support element, thereby deforming the annular body into a hollow conical shape.

Abstract: A method of making a microsurgical cutter from a flat planar substrate having a top surface and a bottom surface comprises the steps of (a) forming a photoresist mask layer on the top surface in the pattern of the microsurgical instrument, the mask layer having an edge portion formed in a predetermined pattern therein; and then (b) etching isotropically the top surface of the substrate through the top surface to the bottom surface so that the top surface and bottom surface meet at a cutting edge portion, with the cutting edge portion having a configuration corresponding to the edge portion of the mask layer. The substrates may be formed from semiconductor materials such as silicon, silicon carbide, sapphire and diamond.

Abstract: A method of and apparatus for mounting hard material tips to a cutter tool such as a saw blade body (6), wherein a gripper/pick-up member/element (4) for handling the tips (8) to be mounted or other material required in the tip mounting operation is moveable about an axis (1) in order to transfer the tips or other material from a supply(ies) thereof to a location (9) at which the tips can be mounted or said other material can be utilized in the mounting of the tips.

Abstract: A saw blade (10) is moved stepwise for complementary finishing operations through a first station (20) and a second station (40) and is stopped whenever a tooth (12) has reached a desired position at the first station (20). Finishing of a second tooth at the second station (40) simultaneously with the finishing of the tooth at the first station is prepared in that the position of the second tooth is determined, which position depends on tooth pitch errors, and a finishing device (60) is moved into a corresponding position for work.

Abstract: The precise cutting of thin wafers from blocks or rods of hard and brittle material by means of ribbon or wire saws requires a very high strength of the sawing ribbon material or sawing wire material. In the method according to the invention, seamless metal rings are cold-rolled to form ribbon loops, optionally divided to form narrower ribbon loops or to form wire loops and optionally provided with a cutting coating. In this way, extremely strong cutting tools can be obtained.

Abstract: A two-tier groove cutting circular saw blade includes a circular core having sectors defined in circumferentially spaced relation to one another along the periphery, and lands defined in circumferentially spaced relation to one another between the periphery and center of the core. Pluralities of outer and inner cutting segments are secured to the respective core sectors and lands. First and second pluralities of anti-undercut elements are defined on the core respectively between the center and periphery thereof and along the periphery thereof between preselected ones of the lands and sectors for defining first and second exit paths away from the inner and outer cutting segments for flow of material particles generated from the cutting of the groove and flushing of the groove by fluid coolant so as to reduce wear and undercutting of the core adjacent to the inner and outer cutting segments.

Abstract: A method of making a shock-resistant and wear-resistant composite steel tool comprises providing a steel tool body having a working edge, and providing a working part material of nonporous wrought steel in an unhardened state which is hardenable to a hardness greater than that of the body. The working part material, in its unhardened state, is fused by welding to the working edge of the tool body while being pressed forcibly against the working edge. After the fusion step, the outer surface of the working part material is hardened to a hardness greater than that of the body of the tool, the depth of penetration of such hardening being limited to the region immediately adjoining the outer surface of the material so that the underlying region of the working part remains ductile, and the weld is normalized thereby increasing its ductility and resultant shock resistance.