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 | bmlekki
Join Date: Oct 2003 Posts: 185 Upstate, NY 
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2004-06-28 89509
I've been looking at the 3 point log splitter in the nothern tool catalog. However it says the continuous tonnage is only 15.7 tons. Does any one have this spliter, and does anyone have an idea how to determine how much tonage one will need. I'll only be splitting a few cords a year, and i like the idea of using the tractor for it..
Thanks Guys!
Link: NorthStar 3-Point Horizontal Log Splitter
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 | beagle
Join Date: Jan 2004 Posts: 1333 Michigan 
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2004-06-28 89516
I don't have the Northstar splitter, but I have a 16 ton splitter I fabricated myself, with parts from Northern Tool. I have not come up against anything I haven't been able to split, including cherry and oak. I have split dozens of face cords with it without a problem. ....
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada 
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2004-06-28 89519
Without getting into a long lesson on physics here, the force a splitter develops is based mostly on the pressure applied to it.
In practical terms, it is still fairly common to see small splitters running off power steering pumps from trucks, since the most they put out is probably about 1,000 psi.
I would have to say that you would very likely get by just fine with about 10 tons or less as long as you weren't taking on gnarly, knotty old oaks or some such challenge. For the average straight-grained firewood I don't think you would need more than about 5 tons.
Best of luck. ....
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 | DRankin
Join Date: Jan 2000 Posts: 5116 Northern Nevada
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2004-06-28 89529
Your 790 will run it a bit slower anyway. I think the 790 hydraulic system is factory set at 2100 psi or so. ....
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| Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
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2004-06-28 89547
Actually Mark brings up a good point, splitting power being a function of the pressure applied to the cylinder, maximum force is at a stated pressure.
In this case Northern says it is 2500 psi, if your machine makes only 2100 psi, or 84% of that, then it will only develop 84% of the stated splitting force also. That would reduce the 15.7 tons to about 13.2 tons.
I don't think it will be a problem regardles.
Best of luck. ....
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