Abstract: An indexable milling insert, including an upperside, an underside parallel to an imaginary reference plane, and two cutting edges. Each cutting edge includes a cutting edge line and is formed between a chip surface included in the upperside and a first clearance surface extending between the upperside and the underside, the first clearance surface forming an acute, nominal first clearance angle (?) with a normal to the reference plane. Each cutting edge includes a main edge, which is at least partly convexly curved as viewed in plane elevation from above, and which extends from an initial end, which determines the maximal cutting depth of the milling insert, to a corner edge having a radius of curvature that is smaller than the radius of curvature of the main edge, the main edge rising in the direction from the initial end toward the corner edge such that the distance thereof to the underside successively increases in the direction.

Abstract: An indexable milling insert for milling tools, including a bottom surface, an opposite chip surface, and a plurality of side surfaces extending between the bottom surface and the opposite chip surface, two of the side surfaces being primary clearance surfaces and two of the side surfaces being secondary clearance surfaces. A plurality of cutting edges are formed between the opposite chip surface and the primary and secondary clearance surfaces. Two of the cutting edges that connect to the primary clearance surfaces are primarily parallel and constitute main cutting edges. At least one lock structure is provided and includes a locking surface arranged on one of the secondary clearance surfaces so that the locking surface and the primary clearance surface form an acute angle, ?, in a section that is parallel to the bottom surface and intersects the locking surface.

Abstract: A drill bit for percussive rock drilling of the type that comprises a front head and a tubular skirt, which extends rearward from the head to a rear, ring-shaped end and includes an internal thread for the transfer of combined impact and rotary motions to the drill bit is disclosed. The rear end of the skirt is, via an unelastic joint, e.g., a friction weld, united to a front end of a sleeve having an envelope surface, from which a plurality of projections are peripherically spaced-apart from each other project, e.g., ridges, having the purpose of guiding the drill bit in the drill hole. By assembling the drill bit of two parts, the internal thread can be turned with high accuracy and smoothness, at the same time as the drill bit is given an inherent good controllability. In an additional aspect, a method for the manufacture of such a drill bit is also disclosed.

Abstract: A molybdenum silicide type-heating element and a method of manufacturing a heating element of the molybdenum silicide type. The heating element contains substantially Mo(Si1-x Alx)2 and Al2O3 and is prepared by mixing a molybdenum aluminum silicide-type material Mo(Si1-yAly)2 with SiO2, wherein the SiO2 has a purity of at least 98%.

Abstract: A gyratory crusher has an outer shell, which is attachable in a frame having a frustoconical supporting surface, which is facing obliquely downwards and inwards. The outer shell has on the outer surface a collar, which has outer lugs, which are movable, from below, past the supporting surface and between inner lugs of a ring. The inner and outer lugs have mutually corresponding contact surfaces, which are adapted, by relative rotation of the ring and the outer shell, to be positioned opposite each other and, upon lifting of the ring, to lift also the outer shell so that a lower portion of the outer shell abuts the supporting surface of the frame. The contact surfaces of the inner and outer lugs are arranged such that lifting of the ring causes the outer lugs to be lifted by means of the inner lugs and brings the inner and outer lugs into radial abutment against each other.

Abstract: A chip holder and a mounting device for the installation of a chip holder in cutting-tool bodies. The chip holder includes a male thread and one or more through, suitably peripheral recesses for accommodating torque-transferring fingers included in the mounting device, as well as for allowing passage of cooling liquid through a bore formed in the tool body in which bore the holder is placed. The mounting device includes one or more torque-transferring fingers, which have looking hooks in order to provisionally clamp the chip holder upon installation. Furthermore, the invention relates to a cutting-tool unit having an installed chip holder.

Abstract: The present invention relates to a drill comprising a cemented carbide or high speed steel substrate and a coating wherein the coating comprises: a first layer system having a multilayered structure covering substantially the whole active part of the drill, a second layer system having a multilayered structure covering only the tip area of the drill. Drills according to the present invention have good wear resistance and improved properties when reconditioning the drill. The present invention also relates to a method of making a drill according to the present invention.

Abstract: The present invention discloses a coated cutting tool insert particularly useful for dry and wet machining, preferably milling, in low and medium alloyed steels, stainless steels, with or without raw surface zones under severe conditions such as vibrations, long overhang and recutting of chips. The insert is characterized by WC—Co cemented carbide with a W and Cr alloyed Co-binder phase and a coating including at least three TiCxNyOz layers and a top layer at least on the rake face of a smooth ?-Al2O3.

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 horizontal shaft impact crusher includes a crusher housing having an inlet for material to be crushed and an outlet for material that has been crushed. An impeller is mounted in the crusher housing for rotation about a horizontal axis. A curtain disposed in the crusher housing is arranged so material accelerated by the impeller is crushed thereagainst. An adjustment device, which adjusts the position of the curtain relative to the impeller, is slidable connected to guide rods. The adjustment device includes a locking device positionable selectively in either a holding state in which the locking device is de-energized and arranged to apply a holding force for holding the adjustment device in a crusher operation position relative to the guide rods, or an adjustment state in which the locking device is energized and arranged to release the holding force, thereby enabling displacement of the adjustment device relative to the guide rods.

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: 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 horizontal shaft impact crusher, including a crusher housing having an inlet for material to be crushed and an outlet for material that has been crushed. An impeller is mounted on a horizontal shaft in the crusher housing and is operative for rotating around a horizontal axis. Material to be crushed is accelerated by the impeller against a curtain. An adjustment device is provided for adjusting the position of the curtain relative to the impeller. The crusher housing includes at least two guide rails to which the adjustment device is slidably connected. A retaining device is arranged to hold, with a predetermined holding force, the adjustment device in a crusher operation position relative to the guide rails. The adjustment device is movable along the guide rails from the crusher operation position and away from the impeller in response to an excessive force being transferred from the curtain to the adjustment device and exceeding the predetermined holding force.

Abstract: A wear resistant and noise reducing arrangement of wear elements in material handling systems exposed to wear and to noise. The arrangement comprises at least one adjustable wear element arranged in a row, wherein the wear elements are provided along one side with a flexible sealing to seal between the arrangement and adjacent arrangements.

Abstract: A milling cutter tool, including a basic body and a cutting body. The basic body includes an envelope surface and two opposite ends between which a geometrical center axis extends around which the basic body is rotated. The cutting body is fixed in a seating of the basic body and includes a pair of opposite main surfaces, a pair of opposite sides, and a pair of opposite end surfaces between which an imaginary, axial neutral plane extends situated halfway between the two main surfaces. The cutting body includes a set of chip removing teeth, which protrude from the envelope surface of the basic body, and are arranged in a row one after the other along at least one of the pair of opposite sides of the cutting body. Each one of the teeth includes a chip surface formed adjacent to a cutting edge from which the tooth extends between a pair of flanks along a length extension which is orientated at an angle (?) to the neutral plane.

Abstract: Nickel based alloy intended for use at high temperatures wherein it comprises in percent by weight (wt-%) C 0.05-0.2 Si max 1.5 Mn max 0.5 Cr 15-20 Al 4-6 Fe 15-25 Co max 10 N 0.03-0.15 O max 0.5 one or more elements selected from the group consisting of Ta, Zr, Hf, Ti and Nb 0.25-2.2 one or more elements selected from the group consisting of REM max 0.5 balance Ni and normally occurring impurities.

Abstract: The invention relates to a base body for a drilling tool, in particular to drilling/grinding tool whose front surface (14) can accommodate a cutting insert holder (2). Said invention also relates to a cutting insert holder used with said base body (1) provided with a seat for receiving a cutting insert (13, 13?, 13?). The aim of the invention is to develop a flexibly usable drilling tool whose cutting insert holder can be adjusted in a simple and accurate manner and is not expensive. For this purpose, at least one adjusting pin (4) which is connected to the base body (1) axially overlaps the cutting insert holder (2) and/or the cutting insert in such a way that a radial adjustment of the cutting insert holder (2) with respect to the base body (1) can be carried out by measuring the radial deviation (a) between the defined point of the cutting insert holder (2) or a cutting insert (3, 3?, 3?) accommodated thereby and the adjusting pin (4).

Abstract: An assembly is disclosed including a holder block, a cutting pick, and an optional hollow sleeve, wherein the shank of the cutting pick is inserted into the holder block or, where present, into the hollow sleeve. When assembled, surfaces of the components meet at an interface. At least one of the first interface and the second interface includes one or more sets of wear elements including cemented carbide bodies press fit into recesses in the forwardly oriented surfaces meeting at the interfaces. The wear elements mitigate direct contact between the opposing surfaces of the components at the interfaces and prevents excessive wear from repetitive impact because the harder wear elements, e.g., cemented carbide, are contact points between the opposing surfaces of the components at the interfaces. A machine incorporating the assembly and a method of manufacturing the assembly are also disclosed, particularly a machine for mining, excavating, tunneling, road planing and/or construction.

Abstract: A method of making a cutting insert using powder metallurgical methods including using a press with a main pressing direction and a press tool setup with a die, a male core rod, a female core rod, a bottom punch, a top punch and a feed shoe. The insert has a noncylindrical hole perpendicular to the main pressing direction, herein referred to as a cross-hole. A cross-hole with increased dimensional accuracy is obtained if the powder also is compacted by the two core rods.

Abstract: A rotatable tool for chip removing machining, including a basic body having front and rear ends between which there extends a first geometrical center axis (C1) around which the basic body is rotatable in a predetermined direction of rotation, and a loose top having front and rear ends between which a second geometrical center axis (C2) extends. The front end of the basic body includes a jaw, which is delimited by two drivers and an intermediate bottom and in which a part of the loose top is received. A centering pin protrudes axially rearward from the loose top and is inserted in an axial center hole, which mouths in the bottom of the jaw and in which a threaded hole mouths for a screw co-operating with the center pin. The center hole includes a cylindrical support surface, which is concentric with the center axis (C1) of the basic body and against which the centering pin of the loose top is pressed by the screw.