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Randy Kerkstra has continued his series on Hydraulics on moldmakingtechnology.com, and this article focuses on how to size a hydraulic cylinder.  In true Randy style, he broke it down into 3 easy to understand steps:

  1. Understand the maximum plastics pressure to calculate the the plastics pressure the cavity surface area will have on the component.
  2. Accurately calculate the the cavity surface that is on the surface area of the component.
  3. Determine the bore size of your cylinder.

He goes on to give more detail on each step, and also gives an example on how to size it.  You can read the entire article here: The Designer’s Edge: How to Correctly Size a Hydraulic Cylinder