In a clamping device (1) for the centred and repetitively accurate support of an object (2), in particular a workpiece to be machined on a machine tool, a tool or the like, the clamping device comprising: a chuck body (3) in which a receiving opening (4) is incorporated which has a longitudinal axis (5) as a centring reference for the object (2), a pulling element (6) which is mounted axially movably in the receiving opening (4), a collet chuck (7) which is inserted into the receiving opening (4) centred on the longitudinal axis (5) of the receiving opening (4) and which is driveably coupled to the pulling element (6), and a conical centring surface (8) which is worked onto the inner wall in the entrance area of the receiving opening (4),
it should be possible to insert a large number of objects (2) of different sizes into a receiving opening (4) of a chuck body (3) and locked in a centred position in this opening without the chuck bodies (3) or their receiving openings (4) having to be adapted to the differently sized collet chucks (7).

This is achieved in that an adapter sleeve (11) is provided, which is arranged between the receiving opening (4) of the chuck body (3) and the collet chuck (7) in the mounted condition, positionally oriented and centred on the conical centring surface (8), in that the outer contour of the adapter sleeve (11) is adapted to the inner contour of the receiving opening (4), in that the collet chuck (7) is mounted in the adapter sleeve (11) so as to be axially movable, and in that the inner contour of the adapter sleeve (11) has an inwardly inclined contact surface (12) which interacts with the outer contour of the collet chuck (7) in such a way that the inner diameter of the collet chuck (7) is reduced when the collet chuck (7) is drawn into the chuck body (3) by the pulling element (6), and the object (2) is thereby held centred and positionally oriented by the collet chuck (7).

A shrink fit adapter for a collet chuck has a rear holding area that can be mounted inside a collet chuck and a front receiving area for holding a tool shank. A through opening runs from a front face of the receiving area to a rear face of the holding area. A clamping area extends into the rear holding area. Here, the adapter is formed with a plurality of slots, which extend radially outward from the through opening and are distributed over the circumference. The slots are arranged in a central area of the through opening and the front ends of the slots are spaced apart from the front face of the receiving area.

A balancing adapter for a balancing device has a clamping device for clamping a workpiece. The clamping device has a clamping sleeve element with a clamping sleeve, and a clamping element that can be moved relative to the clamping sleeve element. The clamping sleeve has a taper, and the clamping element has a mating taper corresponding to the clamping sleeve taper. The clamping diameter of the clamping sleeve can be adjusted, and thus a workpiece can be clamped, by moving the clamping element relative to the clamping sleeve element. The clamping sleeve element is releasably connectable to a base body of the balancing adapter. Accordingly, for connection to the base body, the clamping sleeve element has an annular flange by which, in the connected state of the clamping sleeve element and the base body, the clamping sleeve element rests on an end wall of the base body.

A rotating element operating device includes a device body having a perforation, an operating member having a limiting end and an engaging end and being received in or extended out of the device body along the perforation, and a magnetic member set at the device body or the operating member. When the operating member is received in the device body, the magnetic force of the magnetic member pulls the operating member toward the bottom end of the device body so that the engaging end is set at the top end, and the operating member is secured to the device body by the magnetic force of the magnetic member. When the operating member is pulled out of the device body, the limiting end is positioned inside the perforation so that the operating member is prohibited from leaving the device body.

A tool holder includes a main body defining a mounting end and a receiving end, the mounting end positioned opposite from the receiving end, the main body defining a main body bore extending into the receiving end toward the mounting end; an extension defining a tool head attached to a rod, the tool head defining a tool head end opposite from the rod, a tool holder length defined between the mounting end and the tool head end, the tool head configured to receive at least one cutting tool, the rod received within the main body bore; and a locking mechanism engaging the extension and the main body in a locked position, the locking mechanism being disengaged from either the main body or the extension in an unlocked position, the locking mechanism being selectively positionable about and between the locked position and the unlocked position.

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.

A device for the controlled stabilization of tool holder shanks on the respective ring nut, the tool holder shanks, motorized or non-motorized, being predisposed for ER or other type fixing. The device comprises a ring nut and a tool holder shank of a truncated conical shape provided externally with a groove in which means connecting the ring nut to the tool holder are arranged inside the ring nut. The connecting means consist of an annular body formed of at least two shaped half-rings that define opposite protrusions projecting outwardly and centrally to form a shaped prominence having an arched-convex outer profile; on each of the shaped prominences a recess is made predisposed to house respective elastic pins, by means of which the shaped half-rings are firmly connected inside the ring nut blind holes.

A lockable socket insert and insert lock comprises: a lockable socket insert comprising an insert axis, a cylindrical tool body comprising an free end, a shaft end, and a tool bore extending inwardly from the free end, and a cylindrical key shaft attached to the shaft end comprising a length, a shaft surface, and a plurality of circumferentially spaced key members disposed along the length and protruding radially outwardly away from the shaft surface, the cylindrical tool body, tool bore, and cylindrical key shaft concentric about the insert axis; and a cylindrical insert lock comprising an outer end configured for disposition toward the fastener pocket, a drive pocket end configured for disposition toward the drive pocket, an outer surface, and a keyway opening.

An apparatus in the form of an adapter for forming a connection comprising a first part adapted for coupling with a second part by a quick-release coupling formed by a first projection of the first part having an at least partial dovetail shape and a recess of the second part having an at least partial dovetail shape. An opening in the recess is adapted for receiving the projection in an axial direction. In other embodiments, the adapter is: (1) frictionally enhanced for engaging an internal portion of the drilling element; (2) includes a radial projection elongated in an axial direction for engaging the internal portion of the one drilling element; and/or (3) has a cutter for scoring an internal portion of the one drilling element upon being inserted therein and rotated. An adapter is also disclosed for use with a drill chuck, including for creating a twist lock connection.

A clamping device for clamping an article or workpiece to be balanced includes a clamping apparatus for clamping the article. The clamping apparatus has an adjusting device for adjusting the clamping diameter of a clamping body of the clamping apparatus for clamping the article on a placement surface. The clamping body has a disk-shaped spring element sprung in radial direction with a centrally disposed clearance forming at least one spring element cone. The clamping body also has a clamping element inserted into the clearance and having at least one corresponding clamping element cone. The adjusting device has an actuating device for displacing the clamping element relative to the spring element, for moving the cone surfaces of the clamping element cone and the spring element cone relative to one another and for consequently clamping and/or unclamping the spring element in radial direction by the cone surfaces.