A collet assembly of improved stability has a collet, an axial limiting assembly, a cutter, a pin, and multiple damping elements. The collet has a containing space, a pin-receiving groove, a connecting groove, and multiple receiving grooves. The containing space is formed through the collet. The pin-receiving groove is formed through the collet. The connecting groove is recessed on the collet. The multiple receiving grooves are recessed in the collet. The axial limiting assembly is mounted to the collet. The cutter has a limiting groove and a mounting end. The limiting groove is recessed on the cutter. The mounting end abuts against the limiting assembly. The pin extends into the pin-receiving groove and abuts against the limiting groove of the cutter. Each one of the multiple damping elements is received in a respective one of the multiple receiving grooves of the collet. A collet of improved stability is also provided.

A tool holder with a main part, a deformable receiving portion for clamping a tool, and at least one blocking element which is designed to engage into a corresponding counter element on the tool in order to prevent the tool from moving axially out of the tool holder. The at least one blocking element is integrally formed with the receiving portion. A clamping system having such a tool holder and a method for producing a receiving portion for such a tool holder are also described.

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. Slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

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 collet-type mechanism for releasably gripping either an external or internal target surface of a tubular workpiece includes a collet receiver defining a collet receiver contact surface configured as a curved lateral surface of a truncated right circular cone, and a segmented collet assembly comprising a plurality of collet segments. Each collet segment defines a workpiece engagement surface configured for gripping engagement with a workpiece target surface, and a collet segment contact surface configured for at least partial contacting engagement with the collet receiver contact surface. The collet segment contact surface may comprise two axially-contiguous regions, one of which corresponds to a curved lateral surface of either an oblique circular cylinder or a right circular cylinder, and the other of which corresponds to a curved lateral surface of a truncated right circular cone.

A collet assembly of improved stability has a collet, an axial limiting assembly, a cutter, a pin, and multiple damping elements. The collet has a containing space, a pin-receiving groove, a connecting groove, and multiple receiving grooves. The containing space is formed through the collet. The pin-receiving groove is formed through the collet. The connecting groove is recessed on the collet. The multiple receiving grooves are recessed in the collet. The axial limiting assembly is mounted to the collet. The cutter has a limiting groove and a mounting end. The limiting groove is recessed on the cutter. The mounting end abuts against the limiting assembly. The pin extends into the pin-receiving groove and abuts against the limiting groove of the cutter. Each one of the multiple damping elements is received in a respective one of the multiple receiving grooves of the collet. A collet of improved stability is also provided.

A clamping device for clamping an article or workpiece to be balanced includes a clamping apparatus for clamping the article. The clamping apparatus has an adjusting device for adjusting the clamping diameter of a clamping body of the clamping apparatus for clamping the article on a placement surface. The clamping body has a disk-shaped spring element sprung in radial direction with a centrally disposed clearance forming at least one spring element cone. The clamping body also has a clamping element inserted into the clearance and having at least one corresponding clamping element cone. The adjusting device has an actuating device for displacing the clamping element relative to the spring element, for moving the cone surfaces of the clamping element cone and the spring element cone relative to one another and for consequently clamping and/or unclamping the spring element in radial direction by the cone surfaces.

A load measuring arrangement for a collet assembly is provided. The load measuring arrangement includes a housing having a pocket which includes a first portion and a second portion. The load measuring arrangement further includes a first clamp member having a first groove and a second clamp member having a second groove. The first clamp member and the second clamp member are disposed in the first portion such that the first groove and the second groove together forms a receiving portion. A load measurement device is disposed next to the second clamp member in the second portion such that a load-responsive portion of the load measurement device is configured to be in contact with the second clamp member. The second clamp member is pushed outwards against the load-responsive portion when the receiving portion receives the collet assembly.

A precision securing device is disclosed that comprises a central longitudinal hole to receive a shaft from a first end of the device, a gripping portion around the central hole to fixedly secure an upper part of the shaft, and an adjustment portion around the central hole adjacent the first end. The adjustment portion has a number of lateral adjustment holes opening into the central hole. Each adjustment hole is threaded to receive an adjustment screw into the central hole to contact a lower part of the shaft in the central hole. A first diameter of the central hole at the adjustment portion is larger than a second diameter at the gripping portion. Runout of the shaft is adjustable by adjusting depth of entry of each screw to displace the lower part of the shaft when the upper part has been fixedly secured in the gripping portion.

A chuck includes a mounting part including a conic connection member and a support member in which an end of the connection member is mounted to a predetermined device, and the support member has an axial channel; and a collet partially disposed in the channel and including an axial slit for receipt a portion of a drill bit, longitudinal first gaps on a surface, each first gap having an open end, and first latches each formed between two adjacent first gaps. In response to a force exerted on the first latches, the first latches are flexibly deformed to clamp the drill bit. The mounting part further includes second latches each formed between two adjacent second gaps.