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Re: 3pt logsplitter to run off 8n hydraulics?

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Author  [Modern View]

02-17-2013 03:51:29

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The math is simple. Assuming a 3.5" cylinder and a 20" stroke
  • Volume of the cylinder = (1.75)2 x 3.1416 x 20 = 192 cubic inches.
  • So you need 2 x 192 = 384 cubic inches of oil to cycle the cylinder one time.
  • There are 231 cubic inches in a a gallon so each cycle requires 384/231 = 1.67 gallons.
  • At 2.5 gallons per minute from teh OEM pump your cycle time would be 1.67/2.5 = .67 minutes = 40 seconds
  • Your splitting force will be 1500 PSI x (1.75)2 x 3.14.16 = 14,400 pounds = 7.2 tons
That is doable but painfully slow. I have a 4" splitter I run on my Kubby which makes 4 GPM. I poop out pretty quick so it's quicker than me swinging a maul but not by much. With good straight grain wood that you can split with short strokes it's not too bad. With twisted or knotty stuff that requires a full stroke it is slow going. You really need a flow rate closer to 10 GPM to get a decent cycle time. I can do that with one of the larger live hydraulic kits for about the cost of a PTO pump. If you want to go just remotes for the splitter and skip the live hydraulics it's a couple hundered dollars less.


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Duner Wi

02-17-2013 05:17:55

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 Re: 3pt logsplitter to run off 8n hydraulics? in reply to TheOldHokie, 02-17-2013 03:51:29  
I split with TO20 and 4" cyl for many years.
Yes it is slow so I added a small dia. cyl. for return, that speeds things up considerably.

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