A chuck for a machine tool includes a body rotatable about a rotation axis and defining a plurality of slots extending radially in the body, a plurality of jaws received in corresponding ones of the plurality of slots, the jaws being radially movable relative to the body between an inward position and an outward position, and for at least one of the plurality of jaws, a sealing layer disposed in the slot receiving the at least one of the plurality of jaws and sealing an interface between opposed lateral sides of the at least one jaw and a surface of the body defining the slot receiving the at least one of the plurality of jaws. A method of sealing an interface between a surface defining a slot of a chuck is also described.

A reducing sleeve for fastening a machining tool in a tool holder is described. The reducing sleeve includes a reducing sleeve body, which has a first tool-side end and a second tool holder-side end. In addition, at least one coolant supply channel is provided in the reducing sleeve body. In one embodiment, a safety unit with a pull-out safety geometry has a sealing element, such as an O-ring, to selectively direct coolant through coolant holes in the safety unit and the at least one coolant supply channel or alternatively through a central coolant channel. In this embodiment, a multifunctional interface, and additional O-ring and a sealing unit are not required. A modular reducing sleeve assembly includes a reducing sleeve and a safety unit as separate parts. In addition, a machining assembly including a tool holder, a reducing sleeve, and a machining tool is described.

A clamping chuck for clamping tools having a tool shank includes a sleeve portion which is open at its free end, is preferably composed of electrically conductive material and forms a tool-holding fixture for frictionally locking fixing of the tool shank in a press fit by shrink-fitting. The sleeve portion, preferably over an entire axial length of the tool-holding fixture, includes an inner sleeve and an outer sleeve. The outer sleeve receives the inner sleeve in an operationally ready state, is joined thereto without play, and is preferably also composed of an electrically conductive material.

A cutter holder has a body, a fastening bolt, and a vibration absorbing structure. The body has a specific weight. The fastening bolt is mounted inside the body. The vibration absorbing structure is mounted inside the body and has a sleeve, an elastic unit, a spacer, and a set nut. The sleeve is mounted around the fastening bolt and has a specific weight. The specific weight of the sleeve is larger than the specific weight of the body. The elastic unit is mounted around the fastening bolt and has two opposite ends. One of the ends of the elastic unit abuts against the sleeve. The spacer is mounted around the fastening bolt and abuts against the other end of the elastic unit. The set nut is screwed with the fastening bolt and abuts against the spacer.

The invention relates to a hydraulic expansion chuck comprising a main body (1) that extends along a rotational or longitudinal central axis (2) and is composed of a shaft part (20), for directly or indirectly coupling the hydraulic expansion chuck to a module of a modular tool system or to a machine spindle, and a clamping part (30), joined to the shaft part in a rotationally and axially fixed manner for receiving and clamping a shank tool. The shaft part comprises a receiving socket which extends towards the clamping part and has a central socket-opening in which a connection pin (31) of the clamping part, which pin extends towards the shaft part, is form-fittingly received. According to the invention, the clamping part comprises a stop which is radially offset from the connection pin and axially strikes the receiving socket.

Gripper for gripping a thin-walled aerosol can blank, having a base body which is made of a solid material and which has a bore passing through it along a central axis, an inner surface of the bore being provided with a circumferential radial groove extending outwards in the radial direction, and having a rubber-impregnated workpiece which is received in the radial groove, which has a radially inner gripping surface and a radially outer working surface, the working surface, together with mutually opposite axial surfaces of the radial groove and a radially outer circumferential surface of the radial groove, delimiting a fluid working space, wherein an integrally formed circumferential sealing profile is formed on the gripping ring adjacent to the working surface.

Intrusion of chips is prevent into gaps formed between inner end surfaces of master jaws and a chuck cover. A top plate is disposed at the center of an end surface of a chuck body. Top covers, which move in conjunction with movements of master jaws when opening and closing the chuck, are disposed in top cover guide recesses formed at three positions on the top plate. Each top cover abuts the center-side end parts of serrated surfaces formed on both widthwise sides of a respective master jaw and the center-side end part of a step section of a stepped claw therebetween, and the top covers close gaps formed at the center-side end parts by the movements of the master jaws at all times by moving in conjunction with movement of the master jaws.

A collet includes a plurality of clamping jaws movable relative to one another, at least one recess provided in one of mutually facing side faces of adjacent clamping jaws, and a spring inserted into each recess and supporting the adjacent clamping jaws resiliently relative to one another, and a seal sealing the gap between two side faces of adjacent clamping jaws, with the said seal having a fastening portion engaging in the at least one recess.

A chuck for a machine tool includes a body rotatable about a rotation axis and defining a plurality of slots extending radially in the body, a plurality of jaws received in corresponding ones of the plurality of slots, the jaws being radially movable relative to the body between an inward position and an outward position, and for at least one of the plurality of jaws, a sealing layer disposed in the slot receiving the at least one of the plurality of jaws and sealing an interface between opposed lateral sides of the at least one jaw and a surface of the body defining the slot receiving the at least one of the plurality of jaws. A method of sealing an interface between a surface defining a slot of a chuck is also described.

A collet includes a plurality of clamping jaws movable relative to one another, at least one recess provided in one of mutually facing side faces of adjacent clamping jaws, and a spring inserted into each recess and supporting the adjacent clamping jaws resiliently relative to one another, and a seal sealing the gap between two side faces of adjacent clamping jaws, with the seal having a fastening portion engaging in the at least one recess.