show a device which can be placed at the start of an assembly line to rotate the double body 9 10 as described above the device includes a gripper 20 a rotating cylinder 21 and a linear unit 22 the device is normally in the upper position shown in broken lines in fig3 with gripper 20 open pallet 1 stops at a conveyor stop gate not shown because entirely conventional and well known linear unit 22 goes down with the gripper jaws 23 of gripper 20 apart alternatively the same result could be achieved by horizontal movement of gripper 20 and cylinder 21 gripper jaws 23 close around the stator holder the pins 24 and 25 of jaw 23 engaging openings in body 9 10 cylinder 26 located under the transport system pushes pin 4 upward thereby disengaging body 9 or 10 as explained above linear unit 22 moves upward lifting up the stator holder in an upper position gripper 20 rotates 180 degrees linear unit 22 then goes down and lowers the grooved part 27 of the lower body onto part 3 on the pallet cylinder 26 then goes back down so that the stator holder is again locked to the pallet as described above the present invention can also be advantageously employed in assembly lines or stator production lines featuring machines with automated re tooling i e with machines in which the tool parts designed for processing various workpieces are changed automatically in such systems double body 9 10 may be changed as shown for example in fig5 in this embodiment a manipulator with a double gripper is placed alongside the transport system together with a storage unit transporting.