Abstract: A tool clamping device comprises an axial sleeve having a forwardly tapering internal surface. A radially compressible ring is disposed on the internal surface. An axially compressible spring opposes axial movement of the ring while permitting axial rearward movement of the sleeve whereby the tapering surface of the sleeve compresses the ring radially inwardly into coupling engagement with a groove formed in a tool holder.

Abstract: The invention relates to an indexable cutting insert for face milling of engine blocks of cast iron. The insert has a free surface and a clearance surface and a cutting edge extending peripherally about the insert. The corners of the insert have a relatively large radius and therefore the setting angle gets close to zero degrees during machining of the engine block when the insert gets close to the border line of the work piece. The free surface and the clearance surface enclose an acute angle and therefore the insert has a positive cutting geometry. A land is provided between the free surface and the cutting edge. The land has a width increasing towards each insert corner.

Abstract: A cam shaft tool for a slide type lathe. The invention generally comprises an improved adjustable tool wherein a plurality of holders each carrying a cutting insert is fixed to a main block via an adjustment block. The holder is radially adjustable relative to said adjustment block and axially relative to said main block. The invention also relates to a cutting insert holder for use in a cam shaft tool.

Abstract: A closed rim-type drive sprocket for chain saws, comprising two axially spaced plates for supporting the side links of a saw chain, a gear surface disposed between the lateral plates. The gear surface comprises circumferentially spaced teeth forming gullets therebetween. Bottoms of the gullets are inclined by an acute angle greater than 20 degrees relative to the rotary axis to force particles entering the gullets to be displaced toward openings formed in one of the plates.

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 double-sided insert includes upper and lower rake faces. The rake faces include chip faces lying on the uppermost and lowermost planes of the insert to respectively define a chip deforming face and a holder-engaging supporting face. Those rake faces are so located that the rake face(s) serving as a support face(s) is disposed closely adjacent the cutting edge to minimize stresses imposed on the insert during a cutting operation.

Abstract: A cutting insert for chip cutting machining, preferably for plane milling operations, has a generally square geometry and comprises a chip face and a number of clearance faces. A portion of the chip face is beveled and extends along a cutting edge from one cutting corner toward an adjacent cutting corner. The beveled portion is angularly oriented such that the insert obtains a more negative cutting geometry near the cutting corner than at a distance therefrom in order to achieve increased strength of the insert.

Abstract: A roller bit comprises a plurality of legs each of which has a longitudinally extending pin. A cutting cone is rotatably mounted on each of the pins and a prefabricated sealing insert is fixedly connected at a longitudinally inner end of each of the pins. A sealing element is positioned between the cone and a sealing surface of the insert. The insert is formed of a material having a hardness greater than a core hardness of the pin.

Abstract: The invention provides a milling cutter for machining metal workpieces and a cartridge therefor. The milling cutter comprises a plurality of peripheral recesses for the receipt of insert-equipped cartridges. One of the walls of said recess is provided by two arms integral with the milling cutter body that each by means of a screw is arranged to clamp the cartridge against one wall in said recess. The cartridge is provided with two bores having suitable clearance for the receipt of said screws.

Abstract: An improved abrasive tool plate for surface smoothing of wood, plastic and other soft materials comprises a thin steel plate, on one side of which a pattern of etch fluid resistant material has been applied, followed by etching away the surface between the pattern elements down to a determined depth. Parts of the steel plate protected by the etch fluid resistant material pattern will remain between the etched away parts as protruding elements with flat tops, which can serve as cutting elements. According to the invention, the tool plate is thereafter rolled in multiple steps between one rigid roller with raised parallel strips and on elastically deformable roller to deform the plate so that the etched side shows parallel ridges. Preferably, the ridges are formed in two different directions, so that they form a rhombic pattern.

Abstract: An insert for chip forming machining includes a polygonal body provided with a cutting edge and a chip former. The chip former comprises a plurality of ridges whereby the distance between adjacent ridges diminishes in a direction towards the middle of the cutting edge, whereby the insert cuts a conical corrugated chip which is forced away from the workpiece during machining.

Abstract: A sawing apparatus includes a guide and a pair of oppositely reciprocable saw blades mounted in a groove of the guide. Mounting portions of the saw blades disposed within the groove slidingly engage one another within an interface plane. Each saw blade includes a cutting portion disposed outside of the groove and carrying outwardly set teeth and inwardly set teeth. The inwardly set teeth extend toward and beyond the interface plane. Feed forces can be applied from the guide to the saw blades by inclined end edges of plates which form the guide. The end edges are inclined obliquely so as to face away from the interface plane and engage correspondingly inclined surfaces of the saw blades. Alternatively, feed forces can be applied to back shoulders of the mounting portions of the saw blades by a member which extends between the guide plates within the groove.

Abstract: A tool clamping device for machine tools comprises a draw bar that is axially displaceable inside a machine spindle and a locking element arranged in cooperation with the draw bar. The device becomes secured to a toolholder by effecting a relative movement between the draw bar and the locking element to effect a lateral displacement of the locking element into locking engagement with a shaft portion of the toolholder. Continued axial movement of the draw bar is transmitted as axial movement to the toolholder.

Abstract: A tool is mounted in a holder, the holder including a fluid passage for discharging drilling fluid toward a cutting zone. Fluid flow is regulated by a valve in the holder. The valve includes a housing and a valve element movable in the housing. The valve element opens the valve in response to rearward displacement of the tool relative to the holder. The housing of the valve is also rearwardly displaceable relative to the holder whenever rearward forces transmitted from the tool are excessive, thereby avoiding the occurrence of damage to the valve. The valve housing is yiealdably biased forwardly by fluid pressure in the conduit.

Abstract: The present invention relates to a method of preparing an alloy for use as a cutting tool material comprising hard principles and binder phase by which a uniform distribution of the hard principles in the binder phase is obtained, and the resulting product.

Abstract: A thread coupling includes at least one male thread and one female tread. The male thread is arranged upon a spigot that constitutes an integral part of one drill string element. The one drill string element is provided with a contact surface spaced from the free end of the spigot. The female thread is a part of a coupling sleeve that is connected to another drill string element. The coupling sleeve is provided with an internal stop surface. The contact surface of the one drill string element contacts a free end of the sleeve, but the free end of the spigot is spaced slightly from the stop surface by a gap which is eventually eliminated after the threads have become worn-in. The gap is greater than zero, but no greater than 1 mm.

Abstract: A guidebar for powered saws comprises three plates joined by spot welding, where the outer plates are made from a hardenable steel with carbon content over 0.5 percent without boron and the middle plate from a boron alloyed steel with a carbon content lower than 0.25 percent, thus simultaneously achieving high wear resistance at the chain groove, high strength at the spot welds and high resistance to bending.

Abstract: The invention advises use of a stainless steel alloy of ferritic-austenitic structure as implant in physiological environments, said alloy containing in weight percent max 0.05% C, 23-27% Cr, 5.5-9.0% Ni, 0.25-0.40% N, max 0.8% Si, max 1.2% Mn, 3.5-4.9% Mo, max 0.5% Cu, max 0.5% W, max 0.010% S, up to 0.5% V, up to 0.18% Ce and the balance Fe and normal impurities, whereby the ferrite content amounts to 30-55%.

Abstract: A drill for chipforming machining comprising a drill body (11), two cutting inserts (12, 13) and screws (14, 15). The cutting inserts are screwed to cutting insert sites (18, 19) in the axially forward end of the drill (10). The screws force the cutting inserts radially outwardly during tightening until a shoulder (28) at the lower side of each cutting insert abuts against a vertical support surface (22) on the drill body (11). The cutting inserts are tangentially mounted, i.e. they have holes for accomodating the screws, which terminates in the chip surfaces of the cutting inserts.