Abstract: A face hobbing cutter system for face hobbing spiral bevel gears. The system includes at least one set of detachable cartridge assemblies having a plurality of respective cartridge assemblies. Each cartridge assembly includes a plurality of cartridges and indexable milling inserts. A part of the inserts of each set of cartridge assemblies are rhombic, tangential-mounted inserts for milling flanks of spiral bevel gear teeth, while the other inserts are grooving inserts, which are arranged transversely to the tangential-mounted inserts, for milling roots of spiral bevel gear teeth. The tangential-mounted inserts of each set of cartridge assemblies are provided in pairs, one being provided with its front facing the central axis, and the other being provided with its front facing away the central axis, to respectively mill concave curved flanks and convex curved flanks of the spiral bevel gear teeth.

Abstract: A double-sided, indexable milling insert has a round basic shape defined by an imaginary cylinder, which is concentric with a center axis and extends between two reference planes that extend perpendicular to the center axis and are equidistantly separated from a neutral plane. The milling insert includes a pair of opposite chip faces located in the reference planes between which an envelope surface concentric with the center axis extends, a plurality of identical and alternately usable cutting edges along the peripheries of the chip faces, and lock means for rotationally securing the milling insert in one of several predetermined index positions. The individual cutting edge has the shape of a wave trough and includes two edge segments that meet at a bottom point.

Abstract: A flow restrictor comprising a body adapted to restrict a flow of fluid through a drill rod passage, the body having a coupling for coupling said body into the drill rod passage, said body defining an upstream fluid receiving passage, a downstream fluid egress passage, and a passage of restrictive diameter between said passages to limit the flow of fluid in the drill rod passage.

Abstract: In one aspect, the invention relates to a double-sided, indexable milling insert comprising two rake faces, between which there extends a circumferential clearance face that, in transition to the rake faces, together with the same, forms peripheral cutting edges. Each rake face including lock means for rotationally securing the milling insert in one of several index positions. Along the periphery of the individual rake face, a plurality of tangentially spaced-apart cutting edges are formed, which individually rise at an acute pitch angle from a first end toward a second one. A rake surface is positioned radially inside the individual cutting edge following the cutting edge by rising from a lower boundary line to a crest, via which the same transforms into a declining shoulder surface, which serves as a rotationally securing lock means. In addition, each rake face comprises individual bearing surfaces, which are situated between pairs of adjacent rake surfaces and on a different level from the same.

Abstract: A drill bit features a head portion and a connecting portion for attachment to a drilling device. The head portion includes at least two insert pockets, which can contain inserts, with cutting edges that extend from an inner position offset radially from the rotational axis of the bit to an outer cutting edge. The cutting edge is formed by the intersection of a top surface and a wear surface of the insert pocket or insert. The top surface is linear, but may be planar or non-planar.

Abstract: The present invention relates to a method and a device for manufacturing a blank for a round tool and to a blank for a round tool, and eventually to a method for manufacturing a round tool and to a round tool obtained. The device comprises a die for extrusion and a sleeve arrangement comprising a sleeve, and an end member for closing the sleeve in one end. Extrusion through the die continuously forms an extruded material comprising chip flutes and optionally internal coolant channels, which is received by the sleeve arrangement. The extruded material received by the sleeve arrangement is reworked and shaped to a shank portion after the interior shape of the sleeve arrangement. A projection of the end member protruding into the sleeve forms a bore in the blank. When the shank portion is finished the end member is released and moved forward as extrusion continues to form a fluted portion to complete the blank.

Abstract: A cutting insert for face milling and ramping includes an upper side defining an upper extension plane, a lower side defining a lower extension plane parallel with the upper extension plane, and an edge side extending around the cutting insert. A centre axis extends perpendicularly through the upper and lower extension planes. An upper cutting edge forms four upper cutting edge portions having an identical length corresponding to a determined angle with respect to the centre axis. A lower cutting edge forms four lower cutting edge portions (26), having an identical length corresponding to the determined angle with respect to the centre axis. Each upper cutting edge portion is displaced angularly with respect to the centre axis in relation to one of the lower cutting edge portions with a displacement angle being greater than zero and less than the determined angle.

Abstract: The present invention relates to an exchangeable insert seat member for a metal cutting tool comprising a tool body and a cutting insert, wherein the exchangeable insert seat member is arranged to be placed between the tool body and the cutting insert wherein said exchangeable insert seat member is contacting said tool body and said cutting insert at contact areas arranged such that there is no direct contact between the tool body and the cutting insert and wherein said exchangeable insert seat member is produced by powder injection molding. The present invention also relates to a metal cutting tool comprising such an exchangeable insert seat member.