Hydraulic Press Question

I

idahohiker

Joined
Apr 20, 2002
Messages
56
Hello All:

I was recently given a hydraulic cylinder and was wondering if it would work for a hydraulic press or if it is too big. It is an 8" cylinder about 16" long, has a 4" ram with a 6" travel. Can this be made to work for a press for knifemaking? It says 100 ton on it and is rated for over 9000 psi. Any suggestions will be greatly appreciated.

Thanks,

Bob Jensen
 
might want to mail Indian George..... he's got some info on it. might need to build a really big frame for such a high pressure though. or an H frame press
 
Thanks to all that answered. I contacted Indian George, and he gave me some helpful pointers. I'm so glad for this forum, it allows even novices like me feel welcome and part of a group who are willing to help for even the most mundane questions. Thanks again and I'll let you know how the press project turns out, even though it won't be for quite a while yet.

Bob Jensen
 
Force = pressure times area.

8 inch cylinder area would be 50.27 square inches. Multiply 50.27 times the system pressure (psi) to determine the output cylinder force in pounds. Example if you applied 100psi to cap side of cylinder you would get 5,027 pounds of force.

To calculate retracting power of the cylinder you have to subtract the area of the rod from the area of the cylinder. 4 inch rod area is 12.57 square inches. 50.27 - 12.57 = 37.7sqin. Example if you applied the 100psi to the rod side (37.7sqin) of the cylinder, you have 3,770 pounds of retraction force.
 
Rick do you have the chart to determine gpm needed to arrive at ram speed? If Bob has a 6" ram what gpm does he need to get 1.5" per second ram speed with a 1800 rpm motor?
 
Bruce,
I did the calculations, scanned them in as a jpeg, and emailed the numbers / formulas to you this morning.
 
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