The invention refers to a chuck pallet (1.3) with solid groove-sidewalls (2.3) for clamping chucks (1.1), whereby the x-y-references (2.5) of the chuck pallet (1.3) are allocated in the same plane (2.1) as the z-references (2.1) and the x-y-references (2.5) are also allocated at the solid groove-sidewalls (2.3). The solid groove-sidewalls (2.3) have thereby a tapered profile.

In a zero-point clamping device (1) for centred locking of an object (2) with repeat accuracy, in particular a workpiece, a tool or a pallet, or a carrier part (3) to which the corresponding object (2) is attached, the zero-point clamping device comprising: a housing (4), a receiving opening (5) worked into the housing (4), which has a centring axis (6) with which the axis of symmetry (2 or 3) of the object (2) or the carrier part (3) is coaxially aligned during the clamping process, at least two clamping slides (7, 8 or 9), each of which is mounted axially displaceably in a bore (10) provided in the housing (4) and which open into the receiving opening (5) during the clamped condition and thereby act on the object (2) or the carrier part (3) and secure them, and an actuating element (11) which is rotatably mounted in the housing (4) and by means of which the clamping slides (7, 8, 9) can be moved, one axis of rotation (12) of the actuating element (11) running tangentially and at a distance from the receiving opening (5),
on the one hand, this should enable a reliable, permanent and repeatable fixing of a large number of workpieces, tools, pallets or other objects (2) and, on the other hand, the housing (4) of the clamping device (1) should be extremely compact, i.e. its external dimensions can be kept extremely small in height and diameter.

This is achieved in that two spaced-apart threads (13, 14) are incorporated in the actuating element (11), the respective threads (13, 14) of which have identical pitches and are designed to be inclined in opposite directions with respect to one another, a drive pin (15, 16) is inserted in each thread (13, 14), this drive pin (15, 16) being in a driving operative connection with the respective thread (13 or 14) in such a way that the drive pins (15, 16) can be moved along the axis of rotation (12) of the actuating element (11) by means of the rotation of the actuating element (11), that at least two drive segments (21, 22 or 23) are mounted in a floating arrangement in the housing (4) and extend in an arc around the centring axis (6) of the receiving opening (5), that two of the drive segments (21, 22) are coupled in a driving arrangement to the actuating element (11) via one of the respective drive pins (15, 16), that a respective pivot pin (17, 18) is provided between th

A machining device is adapted to be provided on a mount provided with a toolholder. The toolholder is controllable to rotate and is adapted to be engaged with a tool. A primary coil engaged with the toolholder includes a first ferrite core and a first coil assembly detachably engaged with the first ferrite core. The first coil assembly is modular molded, and is adhered to be an annular body having a first hollow portion. A piezoelectric actuator is electrically connected to the primary coil to drive the tool to vibrate. The secondary coil includes a second ferrite core and a second coil assembly detachably engaged with the second ferrite core. The second coil assembly is modular molded to be an annular body having a second hollow portion.

A manufacturing method of an iron core product includes: heating an iron core body attached to a jig together with the jig; removing the iron core body from the jig when the jig and the iron core body are heated to denote a first temperature; and separately cooling, after removing the iron core body from the jig, the iron core body and the jig such that the iron core body is at a second temperature lower than the first temperature and the jig is at a third temperature lower than the first temperature.

A C-shaped tool holder consisting of an integral frame structure that is delimited by an inner and an outer edge, each C-shaped, in which the C-shaped edges are made from and are connected to each other by at least five multiple-vertex frame bodies that are integrated into the frame structure, in particular triangles, quadrilaterals and pentagons, wherein in each case an inner side of the individual multiple-vertex frame bodies is a connecting surface, continuously curving along a circumferential direction, along the sides of the respective multiple-vertex frame body, and the inner and the outer C-shaped edge is each delimited to the outside by a continuously curving lateral surface.

A machine tool comprises a tool carrier, e.g. in the form of a turret disc (7) that is provided with receptacles (8) for tool holders (9), wherein each tool holder and tool carrier comprise support surfaces associated to each other and devices for fixing the tool holder at the tool carrier. At least one clamping element is provided at the tool carrier (7) that is adjustably supported between a clamping position and a release position in a direction transverse to a tie rod of a tool holder arranged on a slider (22) receptacle of the tool carrier. The clamping element is provided with a first clamping surface (24) that can be brought into engagement with a second clamping surface (35) at the tie rod of the tool holder in a self-locking and releasable manner.

A spindle device is mountable with a tool holder, and includes a rotating spindle rotatably mounted to a spindle main body and extending axially to have an axial end surface. A contactless power transmission module is disposed on a flange end surface of the spindle main body and an outer peripheral wall of the rotating spindle for supplying power. An electrically connecting module includes two conductive units each disposed in the rotating spindle and electrically connected with the power transmission module. Each conductive unit has an electrically conductive post extending axially and exposed from the axial end surface for conducting the power to the tool holder.

A pivot unit includes a housing and a drive motor moveably connected to the housing. The drive motor includes a cylinder housing at least partially defining a cylinder bore. A piston is disposed within the cylinder bore. A first piston rod has a proximal end attached to a first side of the piston and a distal end attached to the housing. The cylinder housing is moveable along the first piston rod relative to the piston and the housing between a first cylinder housing position and a second cylinder housing position. A drive linkage is fixedly attached to the cylinder housing for concurrent movement with the cylinder housing relative to the piston and the housing.

A dust collector for an electric power tool includes a main body case, a dust box, a sliding portion, and a dust collecting route. The main body case includes an exhaust port, the main body case being configured to be installed on an electric power tool. The dust box internally includes a filter. The sliding portion is disposed on the main body case. The sliding portion has a front end on which a nozzle with a suction opening is disposed. The sliding portion is slidable in a front-rear direction. The dust collecting route is from the suction opening to the exhaust port passing through the filter. The main body case includes a guiding portion through which the sliding portion passes, and the guiding portion allows the sliding portion to project rearward when the sliding portion slides.

A chuck for supporting rotationally symmetrical workpieces to be machined, comprising a chuck body having at least three guideways worked into its end face running in the direction of the longitudinal axis of the chuck, at least three clamping jaws inserted individually into each of the guideways in a movable arrangement, and a driving means in a driving connection with the clamping jaws directly or via intermediate elements, with each of the clamping jaws of the chuck being adjustable during machining using driving means configured as an electric motor, with each clamping jaw having an electric motor arranged inside the chuck body, and when the chuck is stationary, the electric motors are electrically connected to a power source by means of a plug-and-socket connection and electrical cables, and/or when the chuck is rotating or at a standstill each electric motor is connected to the power source via an induction device.