The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves. On account of preferably spirally arranged locking grooves along the cylindrical shank of rotary tools, the direction of pitch of which grooves corresponds to the direction of the grooves of the tool, axial locking of the tool is obtained, so that the tool cannot be axially displaced from the tool holder during operation. In addition, force-exerting elements are arranged, with the effect of making the tool lie against the pull-out preventer without play after shrink-fitting.

The invention relates to a tool holder with a tool holding fixture, in particular a clamping chuck such as a contracting chuck, a draw-in collect chuck, a hydraulic expanding chuck and a high-precision chuck, and a shank of a tool, in particular a rotary tool, accommodated in it, wherein the tool holder contains a means for preventing the tool from being pulled out, locking it against axial displacement. This pull-out preventing unit comprises at least one locking element and at least one locking groove, which corresponds to the said locking element, receives it and interacts with it in a positively locking manner. In this case, both the locking element and the locking groove are formed at least partly in the manner of a ball head. Preferably, the tool has the locking grooves. On account of preferably spirally arranged locking grooves along the cylindrical shank of rotary tools, the direction of pitch of which grooves corresponds to the direction of the grooves of the tool, axial locking of the tool is obtained, so that the tool cannot be axially displaced from the tool holder during operation. In addition, force-exerting elements are arranged, with the effect of making the tool lie against the pull-out preventer without play after shrink-fitting.

Provided is a system and method for a hand tool with a plurality of quick release work heads. The hand tool includes a handle having a socket having a first longitudinal axis and an inner cavity extending rearward from an open distal end, the inner cavity having a first non-circular cross section transverse to the first longitudinal axis, the socket further having a quick release transverse to the first longitudinal axis, the quick release releasably disposing a locker transversely across a portion of the inner cavity. The hand tool also includes at least one work head having a second longitudinal axis and a shaft having a second non-circular cross section concentrically conforming to the first non-circular cross section of the inner cavity, the shaft further having a locking groove transverse to the second longitudinal axis and disposed to engage with the quick release locker when the shaft is disposed within the socket of the handle. An associated method of use is also provided.

Provided is a system and method for a hand tool with a plurality of quick release work heads. The hand tool includes a handle having a socket having a first longitudinal axis and an inner cavity extending rearward from an open distal end, the inner cavity having a first non-circular cross section transverse to the first longitudinal axis, the socket further having a quick release transverse to the first longitudinal axis, the quick release releasably disposing a locker transversely across a portion of the inner cavity. The hand tool also includes at least one work head having a second longitudinal axis and a shaft having a second non-circular cross section concentrically conforming to the first non-circular cross section of the inner cavity, the shaft further having a locking groove transverse to the second longitudinal axis and disposed to engage with the quick release locker when the shaft is disposed within the socket of the handle. An associated method of use is also provided.

A shrink fit tool holder assembly has a holder, a tool, and two fastening units. The holder has an axis, an inserting portion, and a fastening hole defined through the inserting portion. The inserting portion has two assembling holes communicating with the fastening hole. Each one of the two assembling holes has an extending axis inclined relative to the axis of the holder. The two extending axes of the two assembling holes are a pair of skew lines. The tool has a shank section inserted in the fastening hole of the holder. The shank section has two engaging grooves. The two fastening units are respectively inserted into the two assembling holes and respectively engage with the two engaging grooves to prevent the tool from sliding or rotating relative to the holder.

The invention relates to a tool holder on a drill transmission for tubular drilling tools having at least two different diameters, wherein the holder is equipped with a hollow-cylindrical recess and with at least one radially oriented locking bolt which is installed in the wall of the hollow-cylindrical recess and which engages in a corresponding opening in the drilling tool, wherein there is at least one further hollow-cylindrical recess which is complementary to one of the different drilling tools.

The invention provides a clamping system (1) for a rotary tool (70), for example a milling cutter or drill. The clamping system (1) includes a base element (10), a collet (30) and a clamping nut (50), said clamping nut (50) friction-locking the rotary tool (70) within the base element (10) with the collet (30). In order to avoid a relative rotation of the base element (10) and the collet (30), the clamping system (1) has a form locking anti-twist protection which blocks a rotation of the collet (30) relative to the base element (10).