Hydraulic force increase

A hydraulic press is a machine press using a hydraulic cylinder to generate a compressive force.[1] It uses the hydraulic equivalent of a mechanical lever, and was also known as a Bramah press after the inventor, Joseph Bramah, of England.[2] He invented and was issued a patent on this press in 1795. As Bramah (who is also known for his development of the flush toilet) installed toilets, he studied the existing literature on the motion of fluids and put this knowledge into the development of the press.[3]

Main principle

The hydraulic press depends on Pascal's principle. The pressure throughout a closed system is constant. One part of the system is a piston acting as a pump, with a modest mechanical force acting on a small cross-sectional area; the other part is a piston with a larger area which generates a correspondingly large mechanical force. Only small-diameter tubing (which more easily resists pressure) is needed if the pump is separated from the press cylinder.


Hydraulic presses are commonly used for assembly and disassembly of tightly-fitting components. In manufacturing, they are used for forging, clinching, molding, blanking, punching, deep drawing, and metal forming operations. Hydraulic presses are also used for stretch forming, rubber pad forming, and powder compacting.[4][5] The hydraulic press is advantageous in manufacturing, it gives the ability to create more intricate shapes and can be economical with materials.[6] A hydraulic press will take up less space compared to a mechanical press of the same capability.[7]

In geology a tungsten carbide coated hydraulic press is used in the rock crushing stage of preparing samples for geochemical analyses in topics such as understanding the origins of volcanism.[8]

440-ton compression hydraulic molding press

In popular culture

The room featured in Fermat's Room has a design similar to that of a hydraulic press.[9] Boris Artzybasheff also created a drawing of a hydraulic press, in which the press was created out of the shape of a robot.

In 2015, the Hydraulic Press Channel, a YouTube channel dedicated to crushing objects with a hydraulic press, was created by Lauri Vuohensilta, a factory owner from Tampere, Finland.[10] The Hydraulic Press Channel has since grown to over 9 million subscribers on YouTube. There are numerous other YouTube channels that publish videos involving hydraulic presses that are tasked with crushing many different items, such as bowling balls, soda cans, plastic toys, and metal tools.

A hydraulic press features prominently in the Sherlock Holmes story "The Adventure of the Engineer's Thumb".

See also


  1. ^ "What is a Hydraulic Press?". XRF. 2018-02-08. Archived from the original on 2019-10-11. Retrieved 2019-09-16.
  2. ^ Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, p. 87, Cypress, CA, 2013. ISBN 978-0-9897906-0-4.
  3. ^ Carlisle, Rodney (2004). Scientific American Inventions and Discoveries, p. 266. John Wiley & Sons, Inc., New Jersey. ISBN 0-471-24410-4.
  4. ^ Hydraulic Press Demo, archived from the original on 2021-12-22, retrieved 2019-09-16
  5. ^ "Advantages of Hydraulic Presses". MetalFormingFacts.com. The Lubrizol Corporation. 4 February 2013. Archived from the original on 20 October 2013. Retrieved 23 August 2013.
  6. ^ Nakagawa, Takeo; Nakamura, Kazubiko; Amino, Hiroyuki (1997-11-01). "Various applications of hydraulic counter-pressure deep drawing". Journal of Materials Processing Technology. 71 (1): 160–167. doi:10.1016/S0924-0136(97)00163-5. ISSN 0924-0136.
  7. ^ "How It Works With The Hydraulic Press". hydraulicmania.com. Archived from the original on 2019-09-24. Retrieved 2019-09-16.
  8. ^ Garcia, Michael O.; Swinnard, Lisa; Weis, Dominique; Greene, Andrew R.; Tagami, Taka; Sano, Hiroki; Gandy, Christian E. (2010). "Petrology, Geochemistry and Geochronology of Kaua‘i Lavas over 4.5 Myr: Implications for the Origin of Rejuvenated Volcanism and the Evolution of the Hawaiian Plume". Journal of Petrology 51(7): 1507-1540. doi:10.1093/petrology/egq027. Retrieved 15 May 2021.
  9. ^ "B.P. Power Engineering Group Co., Ltd". BPThai. Archived from the original on 2018-08-29. Retrieved 2016-06-19.
  10. ^ Sensenig, Kate (Apr 19, 2016). "Welcome to the 'Hydraulic Press' YouTube channel, a truly crushing experience". The Washington Post. Archived from the original on 2019-03-22. Retrieved 2016-06-01.

Media related to Hydraulic presses at Wikimedia Commons