Means for Preventing Tools from Being Pulled Out from Tool Holders with a Tool Holding Fixture

A tool holder according to one of the preceding claims, wherein the clamping chuck preferably is a draw in collet chuck, a high precision chuck, a hydraulic expanding chuck, or a shrink fit chuck.

A tool holder according to one of the preceding claims, wherein the tool, in particular the rotation tool, comprises at least one, preferably two, in particular preferably four locking grooves.

A tool holder according to one of the preceding claims, wherein the shaft of the tool comprises an outer thread at its end, where the outer thread has a left pitch direction for a tool with a left groove, and has an outer thread with right pitch direction for a tool with a right groove, and the tool holder comprises an inner thread corresponding thereto.

A tool holder according to one of the preceding claims, wherein the disposition of the locking elements in the tool holder and, corresponding thereto, the disposition of the locking grooves in the tool are preferably disposed at the same angle.

A tool holder according to one of the preceding claims, wherein the locking elements are disposed in the tool holder, in particular in a plane perpendicular to the rotations axis of the tool.

A tool holder according to one of the preceding claims, wherein the locking elements in the tool holder are balls, pins, bolts, and/or threaded pins, which comprise at least one and at least partially ball shaped convex face configuration.

A tool holder according to one of the preceding claims, wherein the locking elements are supported in the support bore holes in the tool holder, where the support bore holes preferably extend continuously from the outer circumferential surface up to the inner cavity of the tool holder receiving the tool, and where they are either configured perpendicular to the rotation axis of the tool holder and/or tangentially adjacent to the inner circumferential surface of the inner cavity receiving the tool.

A tool holder according to one of the preceding claims, wherein the locking elements are held in the support bore holes, preferably by threaded pins and/or by a press fit and/or the locking elements are configured with an exterior thread, which is configured corresponding to the inner threads configured in the support bore holes.

A tool holder according to one of the preceding claims, wherein the locking elements in their supported position in the support bore holes reach with the ball head shaped configuration at least partially into the interior cavity of the tool holder receiving the tool.

A tool holder according to one of the preceding claims, wherein the locking elements, in particular balls, are held in tool holders, in particular in shrink fit chucks, in at least one ball retainer, where the support bore holes for the balls of the ball retainer comprise a smaller diameter with reference to the inside than the support bore hole diameter.

A tool holder according to one of the preceding claims, wherein the tool is held by the pullout preventer, in particular held in shrink fit tools, axially without clearance by force imparting elements, in particular by at least one compression spring, conical spring, coil spring, disk spring, and spring packets, and/or rubber elastic elements.

A tool holder according to one of the preceding claims, wherein the tool is held by the pullout preventer, in particular in chucks with minimum volume lubrication held without clearance in axial direction, where the transfer piece for the minimum volume lubrication comprises at least one pass-through bore hole in the conical radial flange portion, the radial flange of the transfer piece comprises a radial recess along its cylindrical enveloping surface, wherein corresponding thereto, a cylinder enveloping surface section shaped annular membrane is embedded preferably in a form locking and flush manner, so that it touches, preferably configured from rubber elastic material, where the pass-through bore holes extend radially from the inner cavity of the transfer piece to the membrane.