POWER PRESS, commonly shortened to press, is a machine tool that changes the shape of a workpiece by the application of pressure.[1] Presses can be classified according to their mechanism: hydraulic, mechanical, pneumatic; their function: forging presses, stamping presses, press brakes, punch press. their structure, e.g. Knuckle-joint press, screw press their controllability: conventional vs. servo-presses.