Whirling of shafts occurs due to rotational imbalance of a shaft, even in the absence of external loads, which causes resonance to occur at certain speeds, known as critical speeds.

Apparatus can be used to study the resonance, supercritical or subcritical states of a vibrating system. Shafts of different diameter and length available with the apparatus for experimentation.

Optional Software is available for Data Acquisition and Control Function.