Abstract: A chucking device, in particular for workpieces that are to be machined on more than one side, has a workpiece carrier with at least one turret, arranged to receive workpieces, that is supported rotatably about an axis of rotation on the workpiece carrier, A positive-engagement locking device is associated with the turret, on the workpiece carrier, by which locking device the turret can be locked positionally precisely in a predetermined rotary angle position relative to the workpiece carrier. The locking device has at least three locking parts disposed coaxially to one another, which on the plane faces facing one another each carry pairs of cooperating locking means that can be brought into and out of engagement with one another by means of an axial relative motion of the locking parts.

Abstract: An elongated and cross-section polygonal work piece carrier (1) has at least two clamping surfaces (2) extending parallel to its longitudinal axis (3). It is retained in bearing (5, 9) at least at one end, to be rotatable about its longitudinal axis over 360°. Each of the clamping surfaces (2) is supplied with at least two rotatable work piece holding tables (11) located in a row adjacent each other. The holding tables (11) are coupled by gears (25, 26, 33) with each other and with a common drive gear (35) in such a manner that all tables, in dependence on the rotation of the work piece carrier (1) about its longitudinal axis (3), will rotate over its respective rotation axis (12) about a predetermined angle, depending on the angle of rotation of the work piece carrier; an interrogation device is provided to interrogate whether all rotated tables are in predetermined, locked angular positions.