Re: how to tell the load capacity or ability of a hyd cylinder??
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Posted by Ken McWilliams on September 26, 1998 at 09:04:37:
In Reply to: how to tell the load capacity or ability of a hyd cylinder?? posted by dave campbell on September 24, 1998 at 18:04:47:
Dave, As Gerald commented it's pressure times square area of the piston in the extension direction and pressure times square area of the piston minus the square area of the rod on the retraction direction. Example for a 2" dia cyl with 1000 PSI with 1" rod:
Extending: Pi X r squared x pressure -->3.14 X 1 X 1000 = 3140 Lbs force.
Retracting: [Pi X r squared (piston) - Pi X r squared (rod)] X pressure --> [3.14 X 1- 3.14 X .5 X .5] X 1000 = Approx 2355 Lbs force. One more thing to consider is the column stiffness of the rods when extended. Although you may have a large cylinder diameter or using them on a higher pressure system, if the rod size is small, you will be limited to the amount of extension force because if the rod is small it will have a tendency to buckle. Good luck, Ken McWilliams
Dayton, Ohio
: I have 2 small hyd cylinders (sorry I dont have the size handy) from a self-propelled commercial lawn aerator. (used to adjust depth of corers) I was considering using them on some sort of loader contraption I could fashion for a lawn tractor. My question is, is there ageneral rule of thumb on how to guage the capicity of these cylinders? On a related topic.. anyone ever read a book titled "What you should know about hyd cylinders" by James Anders.. any good for learning more? (I already have Vickers Industrial Hyd Manual.. any other book that could be recommended?? tks in advance- dave
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