Chuck and rotary orienting device

A chuck comprising:

• a basic body having a longitudinal axis and an oblique clamping surface;
• a plurality of radially continuous, longitudinal slots provided within the basic body;
• an actuating element;
• a plurality of clamping jaws, wherein each clamping jaw comprises:
• a stop surface which extends in the plane perpendicular to the longitudinal axis of the basic body;
• a run-on surface being complementary to said oblique clamping surface of the basic body;
• and
• an inner clamping surface;
• a plurality of spring elements;
• wherein the basic body has on its outer side, around the slots, flattened regions on which at least one of the respective spring elements can be fastened,
• wherein each slot is intended to receive one of the clamping jaws,
• wherein each clamping jaw can be displaced radially with respect to the basic body if the oblique clamping surface of the basic body and the complementary run-on surface are displaced relative to one another such that said inner clamping surface of each clamping jaw clamps a workpiece to be held around the longitudinal axis of the basic body, wherein the stop surface is exposed to force in the longitudinal direction during clamping through a direct form-fitting connection with a complementary surface of an actuating element or through a form-fitting connection with a complementary surface of the basic body which makes a further form-fitting connection with the actuating element, and
• wherein the spring elements are leaf springs and wherein the flattened regions merge into tangentially extending slots in which one of the ends of each leaf spring can be fastened, while another end of each leaf spring contacts a lower side of the respective clamping jaw.