Abstract: Air compressor systems, upgrade kits, computer readable medium, and methods for controlling an air compressor for improved performance. The methods may include receiving a working air requirement; determining an estimated air pressure of the air compressor to deliver the working air requirement; measuring a pressure of the air compressor; comparing the measured pressure with the calculated estimated air pressure; if the measured pressure of the air compressor is greater than the determined estimated air pressure by a predetermined greater amount, then decreasing an output control of the air compressor; and if the measured pressure of the air compressor is less than the calculated estimated air pressure by a predetermined lesser amount then increasing the output control of the air compressor. The air compressor may be controlled based on a measured pressure of delivered working air. An oil control system may shut off oil to parts of the air compressor.

Abstract: A solid step drill, including a front tip and a rear end between which a center axis extends and around which the drill is rotatable in a predetermined direction. At least two cylindrical sections are concentric with the center axis, a first section extending rearward from the front tip and having a first diameter, and a second section extending behind the first section and having a second diameter that is greater than the first diameter, the first section transforming into the second section via a step. The tip includes two primary cutting edges, which individually co-operate with a respective chip flute that is delimited by a concave surface and countersunk in the first section and in the second section, the respective chip flute intersecting the step while forming a secondary cutting edge. Adjacent to the secondary cutting edge, a chip breaking recess is formed between a cutting edge line of the cutting edge and the concave surface.

Abstract: Rotary cutting apparatus has a frame, a first rotary device and a second rotary device. Each of the first and second rotary devices has a shaft concentrically arranged about a rotational axis and a drum and are arranged in the frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane. A pair of bearing housings is arranged on either side of each of the drums. A first pair of bearing housings is movable relative to the frame in a transverse direction to the first rotational axis by means of a force means. Means is provided for passive vibration attenuation of at least the first shaft that includes a mass damper having a housing and a damping body movably arranged inside the housing, wherein the mass damper is associated with the first pair of bearing housings.

Abstract: The present invention relates to a fine grained WC-Co cemented carbide. By adding an extremely small amount of Ti, V, Zr, Ta or Nb alone or in combinations, a grain refined cemented carbide structure with less abnormal WC-grains has been obtained.

Abstract: A milling cutter for chip removing machining, including a basic body rotatable in a predetermined direction around a center axis and having a front end surface and an envelope surface that extends axially backward from the front end surface and is concentric with the center axis. A number of indexable milling inserts are mounted in respective peripherally spaced-apart seats having a mutually fixed pitch, each milling insert including an upper side, an under side and at least one clearance surface, the clearance surface together with the upper side delimiting at least two alternately active cutting edges that are uniform in their extension between first and second end points. The cutting edges of each milling insert are situated on different levels in relation to the under side of the milling insert to alter the effective pitch between the active cutting edges of the milling inserts by indexing of at least one of the milling inserts.

Abstract: A tool cartridge for a material removal tool has a cartridge body with, among other things, a recess extending through at least a portion of the cartridge body from a first side toward a second side, a long axis of the recess non-parallel to a long axis of the cartridge body and at least a portion of the recess open to a bottom side of the cartridge body, and a threaded opening for a differential screw proximate a second end of the tool body and positioned longitudinally between an opening for a clamping screw and at least a portion of a seat for a cutting tool insert. A thread axis of the threaded opening is at an angle G relative to a long axis of the tool cartridge. A material removal tool, a tool, and a method of adjusting a cutting tool insert are also disclosed.

Abstract: A strip product consists of a metallic substrate, such as stainless steel, and a coating, which in turn comprises at least one metallic layer and one reactive layer. The coated strip product is produced by providing the different layers, preferably by coating, and thereafter oxidizing the coating to accomplish a conductive surface layer comprising perovskite and/or spinel structure.

Abstract: A cutting tool includes a polygonal cutter body and an end cutting insert for chipforming machining mounted in a serrated seat disposed at an axial end of the cutter body. A bottom surface of the insert has a plurality of parallel serrations meshing with corresponding serrations of the seat. The serrations extend transversely relative to the longitudinal axis for resisting axially rearward cutting forces applied to the insert. The seat is formed directly by the cutter body, or by a shim disposed beneath the insert. The shim is provided with a downward lip to transfer axial forces to the cutter body. The insert can be square or triangular, wherein the serrations are in the form of a plurality of sets of parallel serrations disposed adjacent respective cutting edges.

Abstract: A gyratory crusher frame part and a gyratory crusher include a topshell and spider assembly configured to minimize stress concentrations. An annular flange is formed at the junction between a lower region of each spider arm and an upper region of the topshell. Optimization of loading force transfer and a reduction in stress concentration is achieved by positioning the spider arms radially inward relative to an outer circumferential perimeter of the flange.

Abstract: A TiC-based cermet body includes TiC and WC so that the atomic ratio Ti/W is between 2 to 5, and cobalt as the binder phase is present in an amount of between 5 to 25 vol %. Further, the cermet body has at least one element from group V of the periodic table, Mx, so that the atomic ratio Ti/Mx is between 4 to 20 and the atomic ratio W/Mx is between 1 to 6. The cermet body also has Cr in an amount such that the atomic Cr/Co ratio is from 0.025 to 0.14. The cermet body includes both undissolved TiC cores with a rim of (Ti,W,Mx)C alloy as well as (Ti,W,Mx)C grains which have been formed during sintering. A method of making a cermet body is also disclosed.

Abstract: A wear tip holder for holding a wear tip adjacent to an outflow opening of a vertical rotor wall of a rotor of a VSI crusher includes a mounting plate for mounting the wear tip holder to the rotor wall. The mounting plate has a mounting face for facing the rotor wall to which it is to be mounted and a wear face for facing the interior of the rotor. The wear face is provided with at least one material retention hole for retaining, at the wear face, at least one of a wear-resistant insert and material to be crushed.

Abstract: A conveyor, comprising; two opposite rolls (1, 2), a frame that comprises two opposite beams (3, 4) that carry the rolls (1, 2) and extend in their longitudinal direction between the rolls (1, 2), an endless metal belt (5) extending in a path around and carried by the two rolls (1, 2), and a support element (11) that extends between and is connected to each of the two beams (3, 4), wherein at least one of the rolls (1, 2) is displaceable in the longitudinal direction of the beams (3, 4) in order to enable tightening or loosing of the belt (5), and wherein there is provided a jack (10) that is connected to and acts on said roll (1) for said displacement thereof. The jack (10) is displaceable between at least two operative positions in the longitudinal direction of the beams (3, 4).

Abstract: A horizontal shaft impact crusher comprises a crusher housing having an inlet for material to be crushed, an outlet for material that has been crushed, an impeller being mounted on a horizontal shaft in the crusher housing and being operative for rotating around a horizontal axis, a curtain against which material accelerated by the impeller may be crushed, and an adjustment bar for adjusting the position of said curtain relative to the impeller. The crusher is further provided with a cross beam to which said adjustment bar is connected, said crossbeam being adjustable relative to the impeller, and a curtain position indicator device indicating the position of the cross beam relative to the impeller, thereby indicating the position of the curtain relative to the impeller.

Abstract: A wear element system, primarily for rock, stone and gravel handling equipment. includes a plurality of wear elements received in support rails. The support rails being fastened to surfaces of the equipment. Side edges of two adjacent wear elements are received in one of the support rails. The wear elements and support rails are shaped to fasten the wear elements in the support rails by means of wedge elements. The wedge elements are pushed down between the wear elements inside the support rails.

Abstract: A cutting bit for use in a heavy-duty mining, drilling or milling operation includes a generally conical body, a first end of which presents a cutting point and a second end of which presents an axially extending recess. The body has a generally convex surface portion. Locking means releasably and rotatably connect the cutting bit to a protruding part of a bit holder. The recess has an entrance portion presenting a generally conical surface portion. A corresponding bit holder is presented as well as a system using the cutting bit and bit holder.

Abstract: A method of crushing material between a first crushing surface and a second crushing surface of a crusher, including the steps of measuring a crushing parameter, and analyzing, based on the measured crushing parameter, which type of material that is being crushed in the crusher.

Abstract: Device and method for milling of materials including a milling cutter body including a first end portion and an opposite second end portion. The first end portion is connected to a rotatable spindle and the second end portion is provided with at least one cutting edge. The milling cutter body defines a longitudinal axis and is provided with an axial recess, wherein at least one mass element is arranged in the recess. The axial position of the mass element in relation to the milling cutter body is tuned by use of tuning members included in the device for the tuning of the natural frequency of the device. The mass element is axially locked in relation to the milling cutter body by use of lock members included in the device, in order to optimize the natural frequency of the device for the milling operation in question.

Abstract: A gyratory crusher bearing includes a bearing surface to support rotational movement of a crushing head, wherein a shape profile of the bearing surface at a cross section of the bearing perpendicular to a longitudinal axis of the bearing is substantially circular. A mounting surface is positioned against a bearing support and is orientated to be outward facing relative to the longitudinal axis. A bearing wall is defined between the mounting surface and the bearing surface, the bearing surface defining a central bore extending between a first edge end and a second edge end of the wall. At least one region of the mounting surface in combination with the bearing surface defines the wall between the first edge end and the second edge end and includes a shape profile at a cross section of the bearing perpendicular to the longitudinal axis that is non-circular to define an anchorage region to inhibit rotation of the bearing about the longitudinal axis relative to the bearing support.

Abstract: Container for tools for excavating and cutting geological formations has a base structure with an interior volume accessible via an opening and a lid connected to the base structure to close the opening. A visibility enhancing feature is incorporated into one or more of the lid and the base structure, the visibility enhancing feature based on luminescence or reflectance. A kit including the container and methods of illuminating a portion of an underground mine and of identifying a tool located in an underground mine are also disclosed. When placed in an underground mine and irradiated or illuminated, visible electromagnetic radiation associated with the visibility enhancing feature can illuminate a structure of the underground mine, illuminate a content of the container and/or be an indicia of the tool stored in the container.