This apparatus is designed to demonstrate the phenomena of torsional vibration in shafts. Torsional vibration is angular vibration of an object commonly a shaft along its axis of rotation. Torsional vibration is often a concern in power transmission systems using rotating shafts or couplings where it can cause failures if not controlled.
In this apparatus bracket is mounted on the base plate and chuck is attached with the bracket. Shaft is griped with chuck and rotor is attached at the other end of the shaft. Torsion vibrations vary with length and diameter of the shaft and mass of the rotor.