Abstract: A gyratory crusher has a crushing head fixedly attached to an upper portion of a substantially vertical shaft, on which crushing head a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The second crushing shell defines, together with the first crushing shell, a crushing gap. The gyratory crusher has a space adapted to contain liquid. The space is defined by a piston, which is formed at least partly of the lower end of the shaft, a cylinder, which is formed at least partly in an eccentric assembly, and a bottom element. The space is adapted to form a cushion with the aid of the liquid, so that the cushion can serve as a thrust bearing transmitting vertical forces from the crushing head to the bottom element.

Abstract: The invention relates to a coupling arrangement for coupling a drill shank of a rock drill unrotatably but axially movably. The coupling arrangement comprises power transmission members between the surfaces of the drill shank and the rotation bushing, which transmission members rotate along the surfaces, as the drill shank moves longitudinally to the rotation bushing, and transmit the rotation torque from the rotation bushing to the drill shank.

Abstract: A telescopic feed beam for a rock drill includes a lower beam and an upper beam arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam is such that there is a groove-like open space at the bottom of the lower beam and a transfer cylinder between the lower beam and the upper beam is mounted in the groove.

Abstract: A tool for chip removing machining, including a long narrow basic body having an envelope surface which is concentric with a center axis, and two opposite ends, and a replaceable loose top which is connected to the basic body via a first coupling that includes a first seating formed in one end of the basic body and a first male element formed in one end of the loose top. The basic body includes a primary part body made of a first material having a first modulus of elasticity, and a secondary part body which includes the first seating and is made of a second material having a second modulus of elasticity which is lower than the first modulus of elasticity.

Abstract: The present invention relates to a cemented carbide tool for the deep drawing operations, especially as the ironing dies, of the manufacturing of aluminum or steel beverage cans. The cemented carbide comprises WC with an ultra fine grain size, a binder phase of Co, and grain growth inhibitors (V and/or Cr), wherein the Co content is from about 5 to about 10 wt-%, and with a specific relation between HV30 and cobalt content.

Abstract: Method of producing a sintered body comprising the steps of mixing one or more powders forming hard constituents with powders forming a binder phase comprising cobalt powder where the cobalt powder comprises cobalt having mainly a fcc-structure defined as the peak height ratio between the Co-fcc(200)/Co-hcp(101) being greater than or equal to about 3/2, as measured between the baseline and maximum peak height, measured by XRD with a 2?/? focusing geometry and Cu-K? radiation. The present invention also relates to a ready-to-press powder comprising cobalt having mainly a fcc-structure and where the cobalt powder has a grain size (FSSS) of from about 0.2 to about 2.9 ?m. The present invention also relates to sintered bodies made according to the method. The sintered bodied according to the present invention have reduced porosity and less crack formation.

Abstract: A vertical shaft impact crusher for crushing material including a rotor for accelerating a first flow of material to be crushed, a first feed device for feeding the first flow of material to the rotor, a housing that includes a circumferential impact wall section against which the accelerated first flow of material may be crushed, and a second feed device for feeding a second flow of material to be crushed into the path of the accelerated first flow of material. The second feed device includes an inner hopper and an outer hopper. The inner hopper includes at least one outlet for allowing the second flow of material to enter a space formed between the inner and outer hoppers. A slide plate inclined substantially tangential in relation to the rotor is located adjacent the at least one outlet in the space between the inner and outer hoppers.

Abstract: A cemented carbide tool comprising hard constituents in a binder phase of Co and/or Ni and at least one surface portion and an interior portion in which surface portion the grain size is smaller than in the interior portion is disclosed. The surface portion with the fine grain size has a lower binder phase content than the interior portion. A method to form the cemented carbide cutting tool is also disclosed.

Abstract: The invention relates to crushing and reducing device, in particular to cone crushers, and can be used in the building and ore-dressing industries. The inventive method is carried out by means of a crusher which is provided with proximity sensors, the operation of which is controlled by means of a computer, and with a disc R which is rigidly secured to the unbalanced-mass vibration generator of the crusher in such a way that the plane thereof is always perpendicular to the axis of rotation of the unbalanced-mass vibration generator.

Abstract: A cutting tool includes two parts releasably interconnectable via serration surfaces which are mechanically engageable in each other. At least one of the parts is composed of a first body and a supplemental body on which the serration surface of the one part is formed, and which via a permanent joint is stiffly united to the first body. The permanent joint can be established by laser-welding a shim disposed between the first body and the supplemental body.

Abstract: The invention concerns an end milling cutter having a plurality of end cutting edges (10, 20) of which at least a first (10) extends to the axis (30) of the milling cutter.

Abstract: The present disclosure relates to a ferritic chromium stainless steel with the following composition in percent by weight: C max 0.1, Si 0.1-1, Mn max 0.6, Cr 20-25, Ni max 2, Mo 0.5-2, Nb 0.3-1.5, Ti max 0.5, Zr max 0.5, REM max 0.3, Al max 0.1, N max 0.07 balance Fe and normally occurring impurities, and wherein the content of Zr+Ti is at least 0.2%. The ferritic chromium stainless steel is suitable for use in fuel cells, especially Solid Oxide Fuel Cells.

Abstract: A drilling tool (10) incorporating first and second ends, a shaft (13, 90) extending between the ends. The first end has a drill bit (15) to penetrate rock. The drill hit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means (82, 83) that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt (10), a drill bit (15), drill shaft (13,90) and shaft coupling (94), an anchoring device (23), and an end coupling (95) per se.

Abstract: A magnetizable ink contains at least 65% of magnetizable particles having a modal diameter between 3 ?m and 10 ?m. The particles may have a size distribution with 0% above 18 micron and not greater than 20% under 0.5 micron. The particles may have a surface area less than 50,000 cm2 per cm3, and/or the ink may have a viscosity less than 16,000 cps when ready to print. Where the particles are rounded, magnetically soft iron particles, the surface area may be less than 12,000 cm2 per cm3 and the viscosity may be less than 1,500 cps.

Abstract: Adjustment system for positioning a cutting insert on a cutting tool has a rotatable first rod with a surface having a plurality of flatted areas arranged radially, each at a different radial distance from an axial center of the first rod relative to a sequentially adjacent flatted area, a translatable second rod with an axially tapered surface, wherein a face of the first end of the second rod contacts one of the plurality of flatted areas, a biasing element positioned to exert a force to bias the face of the first end of the second rod to contact the flatted area, and a translatable push pin, wherein a face of the first end of the push pin contacts the tapered surface and wherein a face of the second end of the push pin operatively contacts a cartridge mounted on the cutting tool and in which the cutting insert is seated.

Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides.

Abstract: A vertical shaft impact crusher includes a rotor that rotates about a substantially vertical axis for accelerating a flow of material to be crushed. The crusher further includes a housing, a feed tube, and a feeding chamber. The housing includes a circumferential impact wall section against which the accelerated flow of material may be crushed. The feed tube is for vertically feeding a flow of material into the rotor to be crushed. The feeding chamber includes a feeding chamber side wall and is for vertically feeding a flow of material into the feed tube. A first door is provided for opening and closing an aperture in the feeding chamber side wall. The feed tube is removable from the feeding chamber via the first aperture.

Abstract: A rock breaking machine and to a method of lubricating a tool of a rock breaking machine. The lubricating system comprises at least one lubricant channel (23) into which lubricant is fed by a lubricating device (24). Lubricant is supplied to the bearing members (19) of the tool (6, 13) of the rock breaking machine. The lubricating device comprises a lubricant container (25) and a transfer device (26). The transfer device (26) controls the feed of lubricant into the lubricant channel. The lubricant container (25) is integrated into the body (17, 18) of the rock breaking machine.

Abstract: A method of determining a direction of a drilling pattern in tunnel curve calculation to be executed in a control unit of a rock drilling rig. The invention further relates to a storage device including software product implementing the method, and a rock drilling rig. A tunnel line of a tunnel to be excavated is determined e.g. by using curve fitting. A location of a drilling site on the tunnel line is communicated to the control unit and a navigation plane of the drilling pattern is positioned on the tunnel line. A start point of a round is positioned on the tunnel line and a length of the round is provided. Further, an end point of the round is positioned at a distance corresponding with the length of the round from the start point and a coordinate system of the drilling pattern is directed such that one of its axes points from the start point to the end point. Finally, different coordinate systems are transformed.

Abstract: The invention relates to a sound dampening housing for a rock drill which moves along a feed beam in a longitudinal direction thereof, the sound dampening housing being attachable to the feed beam of the rock drill on its both sides so that together with the feed beam the sound dampening housing constitutes a substantially closed space. The sound dampening housing is double-shelled, and an airspace is provided between its inner shell and its outer shell.