Hunting in the shaft of turbine

This is a 400 kW Power project constructed privately. The electricity is used to heat up and boil the scrap, like used bearings, batteries, iron scrap bring this waste material in use by giving them a shape after it cools. The owner complained of hunting the machine. We visited the plant, checked the hunting issue and found out the solution. In case of hunting, the shaft produces noise and vibrates and with the passage of time the shaft eats bearings does not run smoothly and this causes damage of moving parts.