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17th September 2020, 11:20 PM #1Most Valued Member
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Workshop press build - hydraulic questions
I need to upgrade my old 6T Supercrap press to something of a larger physical size and force.
I've already decided on a rough design and have some of the material collected, including a used ~130mm diameter double acting cylinder.
Should give me a solid 25T at 3000psi.
I've thought about going to the high pressure 10,000psi cylinders but just feel that its a whole lot more stress on all the hydraulic components, and if I stick to 3000psi then hoses and fittings etc are easy and relatively cheap to buy.
I'm reasonably comfortable with hydraulics in general having done a fair bit in a past life with aircraft maintenance, but I have no experience with industrial pumps so hoping for some guidance from those who do.
What type and size of pump should I be looking for?
The 130x400 cylinder is approx 5.3L, so I figure that something of at least 20L/min would be reasonable- ie full stroke in ~15secs.
I definitely don't want huge flow as a fast moving ram in a press would be deadly.
I'm thinking a pump like the 2-stage ones they use for wood splitters might be suitable. Low pressure/high volume for moving to position and then the high pressure side for the actual pressing. They would seem to be similar sized rams and speed to what I'm thinking.
Perhaps one of the all-in-one vehicle hoist pump/motor/reservoir units might be the easiest way to go?
Any ideas?
Steve
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