Abstract: Drive sprocket assembly for chain saws, where a saw chain runs around a loose drive ring that rolls upon cylindrical surfaces of a drive sprocket. Drive links of the saw chain project through holes of the drive ring and enter recesses of the drive sprocket to be driven thereby. The recesses of the drive sprocket have an axial dimension substantially larger than the thickness of the drive links, to enable the drive ring and chain to have substantial axial play relative to the drive sprocket.

Abstract: A bar peeling tool includes a rotatable cutter head with circumferentially spaced cassettes. Each cassette comprises a toolholder and an adjusting device. The adjustment device comprises a setting unit provided with a protrusion which fits into an end of the toolholder. The protrusion includes a recess in which a wedge element is slidable. By sliding the wedge element, the toolholder is adjusted along a longitudinal axis of the cassette. Sliding of the wedge element is performed by means of set screws mounted in the toolholder at opposite ends of the wedge element. A clamping screw extends between the setting unit and the toolholder for clamping the wedge in the radial direction.

Abstract: There is disclosed a method of making a ceramic body where the body is sintered together from compacted parts to form a body with desired shape. The compacted parts are made of powder with less than 6 weight-% lubricant and the sintering is done by isostatic pressing at elevated temperature at which the body is surrounded by a glass melt.

Abstract: A method of manufacturing artificial tooth veneer restorations for natural teeth composed of a ceramic core by pressing and sintering ceramic powder. The core is preferably manufactured from a high strength densely sintered ceramic material by copy milling from an impression of the prepared tooth surface to a compacted body, a presintered body or a sintered body. Alternatively, the core is manufactured by compacting the ceramic powder against a body, which surface is copy milled from a model of the prepared tooth surface. During the copy milling, the sintering shrinkage is considered by enlargement of that body. The tooth veneer restorations are given their final shape by shaping the external surface of the compacted, presintered or sintered ceramic body. After the final sintering, the external surface can be shaped before a veneer material is attached to the external surface of the core by firing of dental porcelain.

Abstract: Guide bar for chain saws, where the chain is supposed by a nose sprocket while traversing the front end. Regions of the edges of the guide bar are locally hardened to a higher hardness than the rest of the guide bar. The regions of hardness are only where the chair impacts the bar near an attachment end of the guide bar after having left the drive sprocket of the power socket, and where the chain settles on the guide bar edge after having been supported by the nose sprocket while traversing the nose curvature.

Abstract: According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 325 weight-% binder phase with extremely good properties at extremely fine machining with high cutting speeds and low feeds. The method relates to the use of a raw material comprising a complex cubic carbonitride containing the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition0.87.ltoreq.X.sub.IV .ltoreq.0.990.66.ltoreq.X.sub.C .ltoreq.0.76where X.sub.IV is the molar ratio of the group IV elements of the alloy and X.sub.C is the molar ratio of carbon.

Abstract: According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight-% binder phase with extremely good properties at fine to medium coarse milling. The method relates to the use of a raw material consisting of a complex cubic carbonitride comprising the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition0.89.ltoreq.X.sub.IV .ltoreq.0.970.52.ltoreq.X.sub.C .ltoreq.0.61where X.sub.IV is the molar ratio of the group IV elements of the alloy and X.sub.C is the molar ratio of carbon.

Abstract: There is provided a solid ball nose tool comprising a hard material with 30-70 volume % submicron hard constituents in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The tool has a constant positive rake angle along the whole end radius of +8+2.degree. and a continuously decreasing clearance angle and towards the center where it is 10.+-.2.degree..

Abstract: According to the invention there now is provided a method of producing a sintered titanium based carbonitride alloy with 3-25 weight-% binder phase with extremely good properties at extreme fine machining when turning with high cutting rates. The method relates to the use of a raw material comprising a complex cubic carbonitride containing the main part of the metals from groups IV and V of the periodic system and carbon and nitrogen to be found in the finished alloy whereby said alloy has the composition0.86.ltoreq.X.sub.IV .ltoreq.0.990.74.ltoreq.X.sub.C .ltoreq.0.83where X.sub.IV is the molar ratio of the group IV elements of the alloy and X.sub.C is the molar ratio of carbon.

Abstract: A cemented carbide insert with improved toughness and resistance against plastic deformation containing WC and cubic phases of carbide and/or carbonitride in a binder phase based on Co and/or Ni with a binder phase enriched surface zone is disclosed. The binder phase content in the insert is 3.5-12 weight-%. In a zone below the binder phase enriched surface zone, the binder phase content is 0.85-1 of the binder phase content in the inner portion of the insert and the content of cubic phases is essentially constant and equal to the content in the inner portion of the insert.

Abstract: An indexable cutting insert comprises an upper surface, a bottom surface and side surfaces extending therebetween. Between two cutting corners, the rake surface is formed such that the rake angle is largest next to the two cutting corners and smallest at a point somewhere between the two cutting corners, preferably at or near the middle of the cutting edge. In this way, the cutting edge is strongest where the pressure load from the workpiece is largest, at the same time as a relatively small average rake angle is attained. This configuration decreases the cutting forces and the energy consumption.

Abstract: There is now provided a body of cemented carbide, Si.sub.3 N.sub.4 or another ceramic material, coated by at least one CVD or PVD diamond or cBN layer with a chromium nitride, chromium carbide or chromium carbonitride layer. The chromium-containing layer is outside the diamond layer which in the case of more than one diamond layer is the outermost diamond layer of the coating. Improved machining properties are obtained.

Abstract: The present invention relates to a method for coating a cutting insert having at least one layer of a carbide, carbonitride, oxynitride, oxycarbide, oxycarbonitride or nitride of one metal selected form the groups IVB, VB or VIB of the Periodic Table, the method comprising subjecting the insert to chemical vapor deposition and coating the insert with an epitaxial kappa-Al.sub.2 O.sub.3 layer by the hydrolysis reaction of AlCl.sub.3, H.sub.2 and CO.sub.2, the hydrolysis reaction being carried out while maintaining the content of water vapor in the gas phase during nucleation of Al.sub.2 O.sub.3 at less than 5 ppm.

Abstract: A cutting insert is mounted in a pocket of a holder so that rotation of an adjustment member mounted in the holder produces rotation of the insert about a center axis. The insert includes top and bottom surfaces interconnected by a side surface. The side surface includes a curved portion engaging side support surfaces of the holder, a pair of planar surfaces extending from respective ends of the curved portion, and a portion extending from one of the planar surfaces to define a parallel land. The curved portion engages the adjustment member so that rotation of the latter produces a fine adjustment of the parallel land.

Abstract: A process for the production of hard materials wherein hard constituent powders are coated with cobalt and/or nickel metal in solution by reducing the metals from a suitable compound such as an oxide, hydroxide or salt with a polyol while keeping the powder in suspension. The polyol functions both as a solvent and a reducing agent at the same time and is present in an amount of at least 5 times more moles polyol than moles metal. There is obtained an even distribution of the cobalt and/or nickel over the surface of the hard constituent powder without the formation of islands of pure metal.

Abstract: A milling cutter head intended for metal machining, particularly aluminum, comprises grooves in which are mounted cutting insert-carrying cartridges and spacer plates. The sides of the cartridge and the spacer plate that are in contact are serrated in the same direction. The other side of the spacer plate and the side surface of the groove being in contact with it are serrated in a direction which is substantially perpendicular to the first mentioned serration. In this way, it is possible to independently and precisely adjust each of the axial and radial directions of the cutting edge.

Abstract: Saw blade, especially a circular saw blade, with replaceable tips wedged in recesses along the periphery of the blade, and held there by elastic forces. Inwards of each recess, but not connected with the recess, at least one tension distributing hole is provided. The contour of the blade body runs inwards from a line between the edges of the tips so far that the bottom of the contour lies farther from the line between the tips than the outer portion of the tension distributing holes, but closer to that line between the tips than the inner portion of said holes. With this arrangement the elastic wedging forces produce tangential tension stresses and only local compressive stresses.