Abstract: A cutting element for a drill bit used in drilling subterranean formations is formed with an internal chamber or passage for the flow of drilling fluid therethrough. A substrate having at least one internal passage, and prior to attaching the table thereto, the at least one passage is filled with a removable substantially incompressible filler material. Attachment or bonding of the table to the substrate under high temperature and high pressure is accomplished without significant distortion of the shape and size of the passage. The filler material may be a crystalline salt such as sodium chloride or halite, which are removable by dissolution in water, or may be boron nitride or a volcanic material such as Pyrofolyte material which are mechanically removable.

Abstract: Saw blades and methods of manufacturing saw blades.

Abstract: A set of driver bits for Robertson screw fasteners includes driver bits (10a-d) whose shaft bodies (12a-d) have distinctive markings thereon corresponding to respective sizes of working tips (14a-d) of the driver bits. These distinctive markings are consistent throughout a family of sets. In one embodiment the distinctive marking are different colors, with each different color corresponding to a working-tip size. The colors are applied only to shaft bodies (36a-d) of some of the driver bits by plating the shaft bodies with zinc layers (22) and then dying the outer surfaces of the zinc layers with color dye (24). This coloring is carried out before the shaft bodies are connected to their respective working tips. Once the outer surfaces (20) of the shaft bodies are thusly colored, the respective working tips are swaged to the shaft bodies to thereby form color-coded Robertson driver bits.

Abstract: A process for making ratchet wheels includes a step of providing a work with a first end and a second end, a step of punching the work by means of a punch so as to define a large recess through the second end, a step of cutting away the first end of the work, a step of defining two annular grooves in a periphery of the work and a step of forming a plurality of teeth on the work. The process may include, before the step of cutting away the first end of the work, a step of punching the work in order to define a small recess with a diameter smaller than that of the large recess, a step of punching the work so as to define an opening with a diameter smaller than that of the small recess wherein the opening extends through the first end of the work. The process may include a step of defining a shallow recess in the second end of the work before the step of defining the large recess.

Abstract: A dicing blade is disclosed which is capable of precisely cutting an object at a high speed without causing significant deposition of swarf upon a cut surface even when the object being cut has a large thickness. The dicing blade includes a ring-shaped cutting blade having a cutting edge formed on the peripheral rim of the ring-shaped cutting blade. At least one slit with a depth greater than the thickness of an object to be cut is formed in the cutting edge.

Abstract: Method of manufacturing a composite blade (300 through 313) having at least two blade portions (101, 201), for a tire curing mold having the steps of providing a first strip (100) of metallic material commonly used to form blades for tire curing molds; stamping or punching out from the strip various shapes to make main blade portions (101); providing a second strip (200) of metallic material; stamping or punching out from the second strip (200) a further set of blade portions (201) having a longitudinal and lateral dimensions which are preferably at most equal to those of the first blade portions (101), assembling at least one of the first and at least one of the second blade portions (201); and affixing the different blade portions (101, 201) together.

Abstract: A stamping punch of a punching apparatus including a grip member provided with crosspieces formed between long grooves on side walls of a rectangular parallelepiped, and a plurality of punch members which are formed integrally with the grip member. The respective punch members are arranged in parallel to one another. A plurality of holes are defined on a punch holder. A large amount of adhesive is contained in the gap between joining surfaces when the grip members of the stamping punches are inserted and secured into the respective holes. Accordingly, the positional accuracy of the punch member is improved, the accuracy of the hole defined through a workpiece is improved, and it is possible to eliminate any fear of occurrence of defect in shape. Further, the rigidity of the punch member can be improved, the stripper is prevented from application of unbalanced load, and the punch is easily exchangeable.

Abstract: A drill-chuck jaw is made by first forming an elongated metal body with a toothed back face and a front face, then machining a longitudinally extending groove having sides and a floor in the front face, and forming inwardly projecting and longitudinally spaced retaining bumps on the groove sides. A hard-metal insert is fitted into the groove between the retaining bumps and then bonded to the body in the groove. the body is heat-treated, that is annealed, before machining the groove in it to reduce internal stresses. Then the body is cleaned and oiled to prepare it for machining and to eliminate any oxidation created by the heat treatment. After machining the body and before fitting the insert the body is deburred and cleaned again. Normally the insert is bonded to the body by soldering or brazing In order to allow the insert to seat directly on the jaw and not be held off it by the solder a channel is formed between the insert and the body in the groove.

Abstract: A composite doctor blade comprises a steel support band configured with a width and thickness suitable for mounting in a blade holder, with tensile and yield strengths suitable for a selected doctoring application. A wear resistant strip of high speed steel is integrally joined to an edge of the support band. The wear resistant strip has tensile and yield strengths higher than those of the support band, and has a hardness of between about 55 to 65 Rc.

Abstract: A method of making a drill comprising a tip (16), a shank (10) and a flute area having chip spaces (12, 14) formed therein, the drill being substantially completely coated with a hard material, and is characterized by applying an abrasive material to merely the tip (16) before coating the drill with the hard material. The drill may more particularly be a solid carbide drill.

Abstract: A tool for removing damaged fasteners and a method for making such tool wherein the tool (10) includes a first end (12) and a second end (14) with an outside surface (32) and an inside surface (40) defined between ends (12) and (14). A portion (46) of inside surface (40) is in the shape of an hexagonal frustum (54) that has a major end (58) and that includes spiral splines (25). Splines (25) have constant depth between the major end (58) and the minor end (56) of frustum (54) and the relief angle (£) of splines (25) decreases in the direction from minor end (56) toward major end (58). In the method for making the tool (10), a tubular section (118) is made from a tapered blank (91) by piercing one end of the tapered blank with a pierce punch (132). One end of the tubular section is then driven onto a splined punch (162) to provide splines in one end of the tubular section.

Abstract: A blade for a rotary cutting machine includes at least one polygonal shaped opening longitudinally spaced from a central portion of the blade. The polygonal shaped opening is adapted to receive a drive head of a conventional socket wrench, a standard Allen wrench, a Torx head type wrench or other similar tool. The polygonal shaped opening enables a user to generate sufficient torque to prevent the blade from being undesirably rotated while the blade is drivingly connected or disconnected from a driveshaft of the rotary cutting machine. In this fashion, the blade may be changed efficiently and effectively using standard tools.

Abstract: An improved process for the manufacture of uniform and accurately sized thin metal blades, particularly for Microkeratome blades used in the Lasik eye correction procedure. The steps comprise qualifying raw blades stock with an accurately positioned dowel hole. Once the raw blade stock is qualified, individual blades are stacked one on top of each other via the accurately positioned dowel hole. Multiple raw blades, stacked one on top of another, are clamped. The wire EDM process is then used to cut precise geometries through individual blades, which are accurately stacked one on top of each other. This process is unique in that multiple blades and individual sharp edges are stacked such that all sharp edges have the same leading edge location.

Abstract: The invention relates to a process for producing supply stock for saw blades or saw belts with a carrier part and a cutting part made from different materials being metallically bonded to one another by means of welding, whereupon the thickness of the bi-metal or tri-metal bond is adjusted or set and supply stock is formed.

Abstract: A hand-held apparatus for cutting transversely a pipe using a slitter co-operating with rollers to produce a deepening cut, is formed of two half-shells mounted opposite around the pipe with adjustable clamping elements one at least supporting a slitter or radially mobile, in the cutting plane, and the other, at least two rollers rotating in the cutting plane and arranged in pair facing each slitter on the other half-shell to compensate the cutting force in the assembly rotation about the pipe resulting from the cooperation between a tangential driving tool and catching elements distributed over the outer surface or on the periphery of each half-shell.

Abstract: A method of constructing a bed knife blade assembly for a reel-type lawn mower having a frame rotatably supporting a cutting reel. The bed knife blade assembly comprises a clamp plate having a flange with a locking surface, and a blade insert having a tab cooperating with the locking surface to restrict movement of the blade insert relative to the clamp plate. The clamp plate is adapted to be coupled to the frame such that the flange biasedly engages the tab to further restrict movement of the blade insert relative to the clamp plate.

Abstract: The method consists in cutting out the outlines (11) of a series of blanks in lengths of shaping sections (10) of variable thickness whereof the cross-section corresponds at least to one cross-section of the blanks. The invention is useful for making clamp jaws and elements of various pliers.

Abstract: A cover for a rotary die is centrifugally cast with multiple layers to substantially eliminate stress when the cover is cast in an arcuate shape for use in a die cutting system. A locking mechanism attached to ends of the cover is designed to be convenient to install on and remove from a cutting cylinder.

Abstract: To provide a way to use a ceramic alloy as a material for producing a cutter knife to be mounted on a thermoplastic resin pelletizer easily, with reduced costs, and also eliminating the possibility of breakage.

Abstract: A composite blade (10, 10A through 10F) for use in a tire cure mold and the method of fabricating the composite blade employs the steps of forming a blade blank (12) and encapsulating at least one end (14, 16) in a second material by placing the end (14, 16) in a die and molding an enlarged cross-section (20) of a second material around the end (14, 16). Preferably the second material is a powdered metal.

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: A ball polishing method includes the steps of rotating one of two plates through use of a rotating mechanism while balls are sandwiched between the plates, pressing one of the two plates against the other plate via a guide slide mechanism for guiding one of the two plates to the other plate by means of a pressing mechanism, and polishing the balls while the pressing force is regulated through use of a pressing force control mechanism. The method is further provided with rotary support means for supporting the rotating mechanism and guide support means for supporting the guide slide mechanism, and at least one of them utilizes hydrostatics. By virtue of this method, a machining pressure can be controlled with a high degree of accuracy, and the accuracy of polishing of balls can be improved.

Abstract: A method of making a drill blank which is elongate and which has a vein of a bonding material located in an end surface thereof. A recess is formed in a surface of a cemented carbide body. Either a layer of ultra-hard abrasive or a mass of ultra-hard abrasive particles is then placed on a surface of the recess. A cemented carbide piece, having the same shape and cross-sectional size as the recess, is inserted into the recess. The cemented carbide body is subjected to conditions of elevated temperature and pressure so that either the abrasive compact layer or the layer of the ultra-hard abrasive bonds the cemented carbide piece to the cemented carbide body. Finally, the cemented carbide body is severed through either the abrasive compact layer or layer of ultra-hard abrasive to produce one or more drill blanks.

Abstract: A machine tool spindle (1) having a through hole capable of housing a collect (30) which grips a tool holder (31) and a draw bar (27) to which the collect (30) is attached, and a tapered inner surface which holds the tool holder; the spindle being made of ceramic as a single cylindrical body. The single cylindrical body has a pair of enlongated holes (2) through which a pin (24) which moves the draw bar (27) in the axial direction of the spindle (1) penetrates. The spindle (91) is preferably made of silicon nitride ceramic, and has a thickness greater than about 0.1 times its outer diameter and greater than about 0.02 times its length.