Three grey rollers are self-centering, move radially for reducing diameter of the orange pipe that rotates and moves axially.
Yellow crank-eccentrics, pink conrods and violet sliders create slider-crank mechanisms.
Blue conrods and yellow crank-eccentrics create parallelogram mechanisms that enables synchronic rotations of three yellow crank-eccentrics.
Green cylinder controls violet slider motion.
This mechanism can be used for cutting pipe, rolling or cutting external thread, self-centering clamping, …