A chucking device for a tool includes a tool receiving element; a collet for clamping the tool, the collet being inserted in an opening in the tool receiving element; a clamping nut for axially displacing the collet in relation to the tool receiving element; and a pressure piece which is arranged between the clamping nut and the collet and is rotatably mounted in relation to the clamping nut, by means of which piece the collet can be axially displaced in relation to the tool receiving element by the clamping nut. To permit a tool shank to be securely clamped in and released from the collet, even under extremely high clamping forces, the pressure piece has coupling elements for a torsion-proof connection to corresponding mating elements of the tool receiving element.

An adapter for holding a tool in a collet chuck, the adapter containing an external taper to accommodate the adapter in the collet chuck. The adapter has a thread for fastening of the tool, and several shape-mated elements are arranged on an outer surface of the external taper for non-rotational holding of the receptacle body during fastening of the tool.

A cutting tool includes a tool holding system having a clamping portion. The clamping portion includes an integrally formed one-piece inner coupling member that at least partially forms a clamping sleeve portion having a clamping bore for clampingly receiving a cutting insert. The clamping portion also includes an integrally formed one-piece outer coupling member that is circumferentially disposed about at least a portion of the inner coupling member. The tool holding system also has a mounting portion that is connected to one of the inner and outer coupling members. The inner and outer coupling members are captively and non-releasably engaged with each other via inter-engaged first and second engagement surfaces that are slidingly displaceable with respect to each other.

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 cutting tool holding mechanism for detachably holding a cutting tool includes: a collet chuck configured to clamp and unclamp the cutting tool; a piston disposed deeper on the proximal side of the spindle than the collet chuck and configured to urge the collet chuck by the pressure of a fluid supplied from the proximal side of the spindle in the direction from the proximal side toward the distal end side of the spindle so that the collet chuck unclamps the cutting tool; a spool valve provided in the piston and configured to open thanks to centrifugal force at the time when the spindle is turned, so as to supply the fluid fed from the spindle side to the cutting tool.

A precision clamping system having a collet having a tool receptacle and which includes a chuck body formed from a single part, on whose first end a connecting piece is formed, which is directly connectable to a machine spindle of a drilling machine, and on whose second end facing away from the first end a collet receptacle is formed for receiving the collet. The connecting piece is designed in such a way that a form-fitting connection to the machine spindle is established for positive rotary entrainment of the chuck body, the collet receptacle has a conical design, and the collet is assigned a collet thread which may be screwed to a thread formed on the second end of the chuck body. A combination of a drilling machine having a precision clamping system and a system including a precision clamping system having multiple collets is also provided.

A flaring tool for flaring an end of a tube includes a locking mechanism having a collar and a collet with two or more collet pieces. As the collet is moved relative to the collar from a non-locking position toward a locking position, the collar engages outer surfaces of the collet pieces and causes the collet pieces to move from a non-clamping position toward a clamping position. As the collet pieces are urged radially inward, they each pivot about a respective pivot axis. As the collet moves further toward the locking position and the collet pieces move further toward the clamping position, the pivot axis of each of the collet pieces radially moves relative to the collet body and the collar. A flaring mechanism moves a flaring mandrel towards the end of the tube when the collet is clamped, whereby the mandrel engages and flares the end of the tube.

A rotating member of a dental clamping apparatus is movably connected to a body and disposed in a through hole. A hole diameter is located on an inner side of a clamping member and is corresponding to an elastic abutting slope. The clamping member is movably connected to the rotating member. A first blocking member disposed in a first blocking hole is engaged with an annular groove so as to rotate the rotating member relative to the body. A second blocking member disposed in a second blocking hole is engaged with an axial track so as to move the clamping member along an axial direction relative to the body. The rotating member is rotated relative to the body to axially move the clamping member. The elastic abutting slope is abutted against an annular slope so as to resiliently deform the clamping member to change the hole diameter.

A locking mechanism includes a biasing ring having a first area having a first radial thickness and a first radially inward facing surface and a second area having a second radial thickness and a second radially inward facing surface. The locking mechanism includes an inner ring having an activation tab extending therefrom and defining a radially outward facing surface. The biasing ring is positioned around the inner ring thereby defining a cavity between the biasing ring and the inner ring. The locking mechanism includes a detent member positioned in the cavity and selectively engageable with at least one of the first radially inward facing surface, the second inwardly facing surface and the radially outward facing surface.

An actuator for use with a power tool is disclosed. The power tool includes a spindle-chuck body defining a tool axis and a collet nut surrounding the tool axis and rotatable about the tool axis. The collet nut is coupled to the spindle-chuck body. The actuator comprises a holder positionable to engage the spindle-chuck body and an actuation assembly including a first member positioned to engage the collet nut when the holder engages the spindle-chuck body and a second member operatively coupled to the first member to rotate the first member about a first axis. The second member is rotatable about a second axis non-parallel to the first axis.