A surgical grip for receiving a handpiece shaft for conjoint rotation therewith and/or for receiving a medical tool in such a way as to transmit torque, includes a carrier sleeve on which at least one coupling component provided for coupling the handpiece shaft is attached such that the at least one coupling component can be brought to a coupled position and to an uncoupled position in the operating state, wherein the at least one coupling component can be brought into contact with an activation unit which is arranged between the carrier sleeve and an outer actuation sleeve, wherein a rotation securing unit present inside the actuation sleeve acts on the activation unit in a spring-biased manner in the operating state such that the activation unit is held secure against rotation relative to the carrier sleeve.

A device for the precise angular positioning of tool-holders includes a front part, a rear part, and a plug cooperating with a pair of pins arranged orthogonally relative to the plug. A first portion of the plug is inserted in a blind hole formed in the front part and a second portion of the plug is inserted in a corresponding blind hole formed in a front area defining a plate on the rear part of the tool-holder. The plate of the rear part has an upper surface in which a pair of bored holes is formed having equal diameters and depths. The bored holes extend vertically in the plate and orthogonally relative to the plug. A pin is rotatably inserted in each of the pair of bored holes to selectively rotate the plug in a clockwise or counter-clockwise direction to orientate the front part relative to the rear part.

The invention relates to a clamping apparatus (1) for clamping a workpiece (100), which is or is to be toothed and has an axis of rotation, onto a spindle, which can be rotationally driven and has a spindle axis defining an axial direction (A), with a clamping mechanism (20), which converts an axial force (FA) transferred via a force transfer device (10) into a clamping force (Fg) directed radially to the spindle axis, wherein the force transfer device (10) has a first section (12) movably guided by a guide arrangement (30) in relation to a movement having an axial direction component, wherein the first section (12) is segmented into several transfer elements (12a, 12b, 12c, 12d) spaced apart from one another in a circumferential direction.

A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. Slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.

The invention relates to a machine tool, in particular a lathe grinding machine, comprising a tool spindle having a collet and a spindle motor, wherein the collet has at least two clamping jaws which are actuatable for receiving and releasing a tool, and comprising an air channel which runs radially on the outside of the collet, wherein the air channel is configured as a sealing air channel (42) and forms a positive pressure chamber (44) at least partially above the clamping jaws (26).

A work-stop assembly in a work-holding-collet is formed of a main work-stop body selectively mounted on the rear of the work-holding-collet and defining a longitudinal through passageway aligned with the collet mouth. First and second work-stop position adjusters allow coarse adjustment of the position of a work-stop element by one of the adjusters while the work-stop assembly is removed from the work-holding collet and allow more precise adjustment by the other adjuster after the work-stop assembly is mounted to the work-holding collet. One of the adjustments employs a slidable relationship between the adjuster and the passageway, and one of the adjusters carries the work-stop element for axial movement in the work-holding-collet to set an adjustable depth limit for a workpiece inserted from a workpiece-receiving mouth at the front of the work-holding-collet.

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 collet includes a plurality of clamping jaws movable relative to one another, at least one recess provided in one of mutually facing side faces of adjacent clamping jaws, and a spring inserted into each recess and supporting the adjacent clamping jaws resiliently relative to one another, and a seal sealing the gap between two side faces of adjacent clamping jaws, with the said seal having a fastening portion engaging in the at least one recess.

A collet includes a plurality of clamping jaws movable relative to one another, at least one recess provided in one of mutually facing side faces of adjacent clamping jaws, and a spring inserted into each recess and supporting the adjacent clamping jaws resiliently relative to one another, and a seal sealing the gap between two side faces of adjacent clamping jaws, with the said seal having a fastening portion engaging in the at least one recess.

A linear friction welding machine having a two-piece collet for holding a workpiece. The two-piece collet includes first and second halves that can be separated for loading the workpiece in a transverse direction, and brought together about the workpiece and locked in place to both secure the workpiece against axial movement as well as support the workpiece against transverse loads.