| 摘要 |
In a power chuck 1, particularly for turning machines, the drive member 11 which act through oblique surface 10-12 on the radially displaceable jaws 4 are each firmly connected to a setting piston 17 which is movable in the axial direction A, of the chuck. To effect a balanced chucking, the setting pistons are exposed to operating pressure fluid on one or both sides and can be displaced independently of each other. To displace all the drive members 11 conjointly, an actuating member 21 is provided acting on drive members 11 or the setting pistons 17 at least in one jaw-setting direction, or being positively connectable thereto. This makes it possible to chuck a workpiece centrically or eccentrically and no particular means for switching from one mode to the other are needed. |
