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What is Hydraulic Press The hydraulic press is a machine press that uses hydraulic cylinders to generate a compressive force. It plays an essential role in each industry, from shaping to creating machine components. The hydraulic press works based on Pascal's principle.  According to Pascal's principle, a pressure shift occurs in fluid when pressure is applied to a confined liquid. A force in the liquid is used by a piston that works as a pump to develop mechanical energy for a hydraulic press. How Hydraulic Press Workes This process of the hydraulic press starts when hydraulic fluid is forced into a double-acting piston. The compressive force in a small hydraulic cylinder pushes the liquid into a large one. In a large cylinder, more energy and pressure are applied. The fluid passage between two pistons creates increased pressure. It delivers mechanical energy to push the anvil on a hydraulic press down to the deformed workpiece to make the selected shape. Types of Hydraulic P...