| 摘要 |
The present invention relates to an arrangement (1) for gripping and holding or releasing a material (M), such as material held in a lathe chuck. The arrangement includes a piston-cylinder assembly (2) and a plurality of material gripping and holding or releasing elements, so-called gripping element arrangements (3). The gripping elements are movable between two positions, an open position and a closed position, in response to movements of the piston-cylinder assembly (2). The cylinder-part (22) of the piston-cylinder assembly (2) includes a circular groove (22a) for co-action with rolling support surfaces (12c) associated with said gripping element arrangement (3). The arrangement also includes a separate gripping member (50) which can be readily fitted to the free end-part (3a) of the gripping element (3') and readily removed therefrom. |
