The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90.

A cutter holder structure comprises a cutter arbor and a connecting shaft having a tapered section at one end thereof. One end of the tapered section is formed with a first inner screw hole, and another end of the tapered section is formed with a second inner screw hole. The connecting shaft further has a horizontal positioning hole that penetrates through the connecting shaft. Two ends of the positioning hole are formed with cylindrical holes. A reduced hole is defined between the cylindrical holes. A nut has a third inner screw hole at one end and an axial hole at another end. The nut further has a horizontal countersink hole and a horizontal fourth inner screw hole. An eccentric distance is defined between a center of the countersink hole and a center of the fourth inner screw hole. A screw is inserted through the countersink hole and locked into the fourth inner screw hole.

A cutting insert includes a head portion having a number of cutting edges and a centering pin which is disposed about a central longitudinal axis and which is coupled to, and extends axially away from, the main head portion. The centering pin includes a recess structured to accommodate a portion of a setscrew. The recess includes: a first angled surface disposed generally facing away from a leading end of the centering pin at an acute first angle with respect to the longitudinal axis of the centering pin; and a second angled surface which is positioned opposing the first angled surface at an acute second angle with respect to the longitudinal axis of the centering pin.

A tool includes a cutting insert with a shank, which extends along a cutting insert longitudinal axis, and with at least one cutting edge, wherein at least a part of the cutting insert is a first material and further includes a tool holder which extends along a holder longitudinal axis and includes on an end-face end a cutting insert receptacle for receiving the cutting insert shank, wherein the cutting insert receptacle is a cup-shaped recess. The tool further includes an attachment element which is connected to the cutting insert and extends in a circumferential direction around the cutting insert shank, wherein at least a part of the attachment element is a second, different material. The tool also includes a fastening element for fastening the cutting insert on the tool holder, wherein, in a mounted state, the fastening element contacts the attachment element to fasten the cutting insert on the tool holder.

An assembly of a tool and a tool holder may include the tool, which may have an elongated body with a socket, and the tool holder, which may have a body with a first bore configured to receive at least a portion of the elongated body, and a second bore substantially transverse to the first bore. The assembly may also have an impinging member including a body having an end with a radial surface. In an assembled state, a portion of the elongated body of the tool may be positioned within the first bore of the body of the tool such that the socket and the second bore may be substantially aligned, and the body of the impinging member may be positioned within the second bore with the radial surface pressed against the elongated body in the socket at a predetermined torque.

The present invention provides a rigid modular holding with axial and radial compensation for multiple and universal application of all machining processes, engineering, machine building, and construction fields where ever applicable for rotary and static systems. Design of modular holding includes male and female portions (401,301) of joining parts machined to the required shape and clearances to accommodate modular locking rigidly with face butting (407, 308). Radial and axial run out adjustments is controlled by the grub screws (307, 306) and run out compensation can be achieved within micron. An Area used for clamping and designed within the area of joining parts results reduction in material and processing cost. Since, the material is not protruding out from the surface of the joining parts, esthetically looks good and convenient for designing multiple applications as it is not possible at present.

A tool holder for a machine tool, having a retaining component which can be rotated about an axis of rotation and on which a cutting tool is or can be fastened in a releasable manner, wherein the retaining component has at least two plug-in mounts, which are offset in the circumferential direction about the axis of rotation and are intended for receiving a respective cutting tool, having an elongate plug-in shank and a cutting portion, wherein each cutting tool is or can be fixed in the plug-in mount via a separate retaining device, and wherein the cutting tools delimit between them a receiving space for a workpiece which can be machined by the cutting tools together, the cutting tools having their cutting portions facing toward the receiving space.

Tool holder has a first section adapted to be connected to a machining center and a tool holding section comprising a bore with a surface defining an inner diameter of the bore. Dispersed around the surface of the bore and at least partially embedded in the surface of the bore is a joining compound having a Young's modulus greater than a Young's modulus of the surface of the bore.

A fixture for a thin-walled workpiece includes two clamping devices. Each of the clamping devices has a metal carrier and a damper. The metal carrier has a carrying portion and a supporting portion, where the supporting portion has a stair portion having a plane surface and a standing surface with a slope. The damper has a metal clamping portion and a damping portion. One end of the metal clamping portion is formed as an inclined surface. The damping portion has at least two elastic layers and at least one metal layer, which are laminated in an interlacing arrangement with the same slope of the inclined surface. One of the elastic layers is disposed to connect the inclined surface. The end of the metal clamping portion connecting the elastic layer is located on the stair portion, while the opposite end of the metal clamping portion protrudes out of the supporting portion.

The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90.