The clamp has a shank keyed to an expander.

The expander engages the core bolt such that rotation of the core bolt bulbs the expander to clamp the work pieces.

An expansion chuck has an expansible bushing (3) inserted in a bore (2) of the chuck housing (1) and which can be compressed by hydraulic pressure in order to easily clamp a tool.

The apparatus (100) includes a tubular mandrel subassembly (110), a load transfer subassembly (140) and an expander cone subassembly (142).

A shaft (7) is disposed on the end (4) on the machine side for clamping the expansion chuck (1) in a machine tool.

The invention relates to an expandable winding mandrel with a covering (2) which can be placed on the mandrel (1) and which is made of individual annular segments (3) connected together by draw springs (4).

In arbor chucks, the wobble washer and floating nut counteract misaligned pulling forces due at least in part to the lead angle of threads (15) on an expander (14) of the arbor chuck.

The invention relates to a hydraulic expansion chuck (1) that is simple to produce, comprising an end (3) on the tool side, and an end (4) on the machine side.

To permit highly precise machining of a valve seat (26) and a valve guide, the combination tool has an extensible chuck (4) that is in particular hydraulic and is designed to hold a fine lathe for machining the valve guide.

The invention relates to an expander mandrel comprising a sleeve having a cylindrical outer casing (11), the sleeve being slotted forming a tongue (12) pivotable radially when the expanding member (20) is introduced.

The expander mandrel is arranged in one at least partially open bore of the tool holder, wherein in the entire open region a tool rests on the sleeve in the region of the pivotable tongue.

Said expander mandrel is preferably used as a member for setting the distance of machine components, in particular for axial or radial alignment of tools or tool cases in a tool holder.