Patent ID: 7275460

Claim:
Rotary indexing machine for use in a group of machining stations, in whose machining zones is arranged at least one tensioning device for exchangeable tool holders, the rotary indexing machine including a rotary indexing unit provided with a lift-and-turn device, to which support elements for accepting the tool holders are attached, the lift-and-turn device of the rotary indexing unit being provided with a piston rod and a first coupling element, wherein during lifting movement, the piston rod is rotationally fixed and at least one radial outer projection of the first coupling element engages at least one guide element that is attached in a locationally-fixed manner, and wherein the first coupling element is rotationally fixed to the piston rod and through the lifting movement of the piston rod is configured for engaging an additional coupling element surrounding the piston rod and situated above the first coupling element.