Abstract: In a T-shaped tool (10) in which a head (30) having cutting edges (36, 38) and a cylindrical shank (20) are fastened together: the shank comprises a super-hard alloy, and an engaging portion which engages with a tool main body is formed in a distal end portion thereof; the tool main body comprises a steel material, and an engaged portion which engages with the engaging portion of the shank is formed therein; and the engaging portion and the engaged portion are fastened in such a way as to be retained and prevented from rotating.

Abstract: A boring tool has a slider member connected to a cutting insert seat, the slider member is arranged movably inside a tool body of the boring tool along a path extending transversely to a rotation axis of the boring tool for adjusting the distance of the of the cutting insert seat in relation to the rotation axis. A wedge-shaped clamping member is connected to a drive unit and arranged inside the tool body. The wedge-shaped clamping member is in contact with the slider member for clamping the slider member into a locked position, in which locked position, the wedge-shaped clamping member is pre-loaded to passively lock the slider member. The drive unit is controllable such that the wedge-shaped clamping member is actively releasable when adjusting the distance of the cutting insert seat.

Abstract: A rotary tool of the present aspect has a body and a cutting edge positioned on the outer periphery of the body. The cutting edge has a first section and a second section when viewed on an imaginary plane defined by cutting a rotational trajectory of the rotary tool on a plane including a rotational axis. The first section has a first region and a second region. A first radius of curvature of the first region is greater than a second radius of curvature of the second region in at least one of a plurality of the first sections.

Abstract: A rotary cutting tool includes a shank portion, a cutting portion, and a cutting tip. The cutting portion includes a plurality of blades and a plurality of flutes. Each blade includes a leading face, a trailing face, and a land surface extending between the leading face and the trailing face. The cutting end includes an end cutting edge having a first end face cutting edge portion formed with a positive, neutral or negative radial angle, a positive dish angle and a negative axial rake angle, and second end face cutting edge portion formed with a highly positive radial angle, a positive dish angle and a negative axial rake angle. The highly positive radial angle of the second end face cutting edge portion enables the rotary cutting tool to perform a ramp operation at very large ramp angles of between about 15-45 degrees.

Abstract: A three-flute drill includes a body, discharge grooves, cutting edges, thinning edges and gash portions. The discharge grooves are provided in an outer peripheral surface of the body. The cutting edges are provided on ridge sections between inner faces of the discharge grooves and flanks of the body. The thinning edge extends from an end of the cutting edge toward a radially inner side. The gash portion includes an R portion and a straight portion. A first ridge line between the R portion and the flank extends while curving toward a rotation direction, from an end of the thinning edge toward a radially outer side. A second ridge line between the straight portion and the flank extends linearly from an end of the first ridge line toward the radially outer side, and connects to the discharge groove further to the radially inner side than the outer peripheral surface.

Abstract: A magnetic base for an electric machine tool, in particular for a magnetic core drilling machine. A body that is accommodated in a receiving space. At least one first magnet coil constituting an electromagnet, a coil winding of the at least one first magnet coil being wound on a bobbin and a magnetic force of which is switchable between a maximum resultant holding force and a minimum resultant holding force. The coil winding of the magnet coil has two end sections that are each connected to a connecting cable that serves to make electrical contact between the magnetic coil and the electric machine tool. The body has a first side adapted to be coupled to the electric machine tool and has an opposite second side adapted to be placed on a workpiece that is to be processed. End sections of the coil winding are connected to the connecting cables.

Abstract: Cutting tool for the rotary machining of workpieces, in particular a twist drill, with a cutting tip which has at least one main cutting edge and at least one free surface (24), wherein a flank face adjoins the main cutting edge radially to the outside, and wherein a flank angle of the flank face increases in a radially outward direction.

Abstract: A high-speed machining tool made of a steel-bonded carbide and a method for preparing the same relate to the technical field of lathe tools made of steel-bonded carbides, and overcome the problems of traditional steel-bonded carbide lathe tools about low hardness and low toughness. The high-speed machining tool includes a skeleton, a main body, and a coating. The main body is consolidated by the skeleton from inside. The skeleton and the main body are both ringlike in shape. The main body has its outer surface covered by the coating. The high-speed machining tool is such made that the skeleton is hard and the main body is tough. The blade of the tool is hard and can transfer vibrations to the main body, thereby protecting the tool from brittle fractures and improving the overall performance of the tool.

Abstract: Provided is a cutting tool that implements both high positioning accuracy and simple operation when the cutting tool is installed in a tool rest. The cutting has: a tool a main body which includes a fixing seat fixing a cutting insert or a cutting edge; and a position pin, which includes a cylindrical portion that is used for positioning the main body by being abutted to an abutting surface of a tool rest in a case of installing the main body in the tool rest, and which is detachable from the main body. The main body includes a female screw hole that is provided with a female screw portion and a tapered surface that is symmetric with respect to a center axis of the female screw portion and that widens toward an opening thereof. The positioning pin includes a male screw portion that engages with the female screw portion, and a contact portion located at a connecting portion that connects an end of the cylindrical portion and an end of the male screw portion.

Abstract: A method of manufacturing a metallic rotor of an eccentric screw pump, comprising clamping a workpiece extending along a central longitudinal axis in a workpiece clamping device and removing material from the workpiece by cutting with a cutting tool. The invention further comprises not producing the surface of the rotor in a three-axis whirling process, using the cutting tool to produce the outer surface geometry of the rotor, advancing the cutting tool along an axis of advance that is parallel to the longitudinal axis of the rotor, and rotating the cutting tool about an axis of tool rotation that is parallel to the longitudinal axis of the rotor.

Abstract: A spiral step twist drill bit, including a shank and a cutting portion. The cutting portion is provided with a spiral flute and a body clearance. A tip of the cutting portion is provided with a chisel edge and a cutting edge. A flank face is connected to the cutting edge, and is provided with a spiral cutting groove. A spiral direction of the spiral cutting groove is the same as that of the spiral flute. A slope of the spiral cutting groove is the same as that of the flank face. The spiral cutting groove is configured to divide the cutting edge into multiple segments to form multiple first edges and second edges.

Abstract: In one aspect, a swiss-type machine tool is provided that includes a workpiece holding shaft, a workpiece supporting shaft, and a tool holder associated with the workpiece supporting shaft for holding at least one tool. The machine tool includes a drive operable to rotate the workpiece holding shaft and the workpiece supporting shaft around an axis. The workpiece holding shaft has a work holder configured to secure a workpiece to the workpiece holding shaft. The workpiece holding shaft is axially shiftable relative to the workpiece supporting shaft to adjust a position of the workpiece relative to the workpiece supporting shaft. The machine tool further includes a removable workpiece support, such as a guide bushing, configured to be releasably connected to the workpiece supporting shaft and rotate therewith. The workpiece support slidably contacts the workpiece and permits axial movement of the workpiece relative to the workpiece support.

Abstract: A cutting tool, including a cutting edge portion composed of a cubic boron nitride sintered material, wherein the cutting edge portion has: a flank face; a rake face contiguous to the flank face; and a cutting edge positioned on a ridgeline of the flank face and the rake face, an arithmetical mean height Sa of the flank face is 0.5 ?m or more and 3.0 ?m or less, the Sa is measured in accordance with ISO25178-2:2012, and an oxygen concentration of the flank face is 10 mass % or more and 50 mass % or less.

Abstract: The present invention provides certain additional improvements for such mechanical-type multi-axis machine tools. These improvements include: (1) permitting the spindles to be rotated about their respective axes relative to the member independently of one another, (2) providing a low-cost, and yet highly-effective, sensor apparatus for determining the angular position of the member relative to the frame without the use of an expensive encoder or the like, (3) mounting the rotatable member more precisely relative to the frame, and (4) providing a zero-backlash tool slide on the frame for imparting an action to a workpiece.

Abstract: The invention makes a tool available, which allows highly precise, simultaneous production of two back-tapers on the tooth flanks of the teeth of a workpiece in the form of a gearwheel, independent of their width. For this purpose, the invention provides that the tool includes a tool carrier configured in elongated manner, in the manner of a journal, and oriented coaxial to its central longitudinal axis of the tool, and includes at least two blades, which come into engagement with the tooth to be machined, in each instance, removing chips during use, wherein the blades are held on the tool carrier at a distance from one another in the longitudinal direction of the tool carrier and extend over a partial length of the tool carrier, in each instance, in terms of their width. According to the invention, in this regard the position of at least one of the blades is adjustable in relation to the other blade, so as to balance out deformations of the tool carrier that occur during use.

Abstract: A trimmer device includes an inner mounting block having a first central aperture for receiving a turret shaft. The inner mounting block has an inner bore. The device includes an outer mounting block having a second central aperture for receiving the turret shaft. The outer mounting block has at least one outer bore. The device includes an inner trimmer spindle positioned through the inner bore. A first end of the inner trimmer spindle includes a pilot having an inner spindle blade. The device further includes an outer trimmer spindle positioned through the outer bore. The outer trimmer spindle includes an outer spindle blade positioned at a first end. At least one of the inner mounting block or the outer mounting block is rotatable about the turret shaft to adjust for a diameter of an article such that the article is positioned between the inner and outer spindle blades for trimming.

Abstract: A damper system for a cutting tool is provided having at least one damper body that is added to a cutter body of the cutting tool to help dampen a vibration when the cutting tool is placed in use. The damper body is supported by a damper ring. The damper ring is held in place between a central support boss or hub and an adjustable top cap. The adjustable top cap can be tightened or loosened by use of a fastener element to change the amount of pressure on the damper ring. By adjusting the tension placed on the damper ring, the damper system can be tuned to better suppress vibrations when the cutting tool is placed in use.

Abstract: The invention relates to a drill comprising a drill tip, wherein the drill tip comprises at least one main cutting edge having a cutting corner, from which the main cutting edge extends to a center, wherein the drill tip comprises at least one additional cutting edge having an additional cutting corner, from which the additional cutting edge extends in the direction of the center, wherein the additional cutting edge is formed only on an outer portion of the drill tip and is thus shorter than the main cutting edge, wherein the additional cutting corner projects beyond the cutting corner.

Abstract: A cutting tool including a substrate and a coating film disposed on the substrate, wherein the cutting tool includes: a rake face; a flank face contiguous to the rake face; and a cutting edge region composed of a boundary part between the rake face and the flank face, wherein the coating film includes a TiSiCN layer, the TiSiCN layer has: a first TiSiCN layer positioned in the rake face; and a second TiSiCN layer positioned in the cutting edge region, the first TiSiCN layer has a composition of Ti(1-Xr)SiXrCN, the second TiSiCN layer has a composition of Ti(1-Xe)SiXeCN, and the Xr and the Xe each represent 0.010 or more and 0.100 or less, and satisfy a relationship of Xe-Xr?0.003.

Abstract: A cutting tool used for grooving and turning operations where a cutting insert is releasably securable in a tool holder. The cutting insert includes insert upper and lower surfaces, at least one of which includes an insert engagement arrangement having two converging insert engagement wedge surfaces. The tool holder includes an insert receiving slot having a clamping jaw surface and a base jaw lower surface, at least one of which includes a slot engagement arrangement having two converging slot engagement wedge surfaces. When assembled, the cutting insert is releasably clamped in the insert receiving slot. The at least one insert engagement arrangement abuts the at least one slot engagement arrangement only at the insert engagement wedge surfaces and the slot engagement wedge surfaces.