log spltter

If you are working a hydraulic woodsplitter from
tractor hydraulics, then, speed is determined by
pump output in gallons per minute, (GPM), and the
machine may cycle faster as the tractor engine is
speeded up. Splitting force is determined by the
tractor output pressure, pounds per square inch,
(PSI), which is determined by the safety relief
valve setting of the tractor hydraulic system.
Force is also subject to the size of the splitter
cylinder. A 4 inch bore cylinder has 12.56 inch
of piston area. pressure times area equals tonnage
of force (12.56 X 2000 =25120) divide by 2000
lbs per ton equals 12 1/2 ton. the same 2000 psi
on a 5 inch cylinder, (19.625 inch area) is
39250 lbs which is 19.62 tons.
There are reducing valves which reduce pressure
going from a system to a component, but no valve
can increase pressure beyond that of system
pressure setting.
Determine system pressure, and knowing cylinder
size will allow you to calculate splitting force
 
The 135 I used to split with, while not the quickest to cycle, had more then enough force to split anything I was splitting (100 year old maples and oaks, some poplar, ash and spruce thrown in for good measure). Cycle was probably 30 or 40 seconds under load while splitting, though I can't remember...that has to be nearly 10 years ago now. We used to leave the tractor at a lower RPM since we didn't want to burn a lot of fuel, and the exhaust dumped right by the splitter (ack!). But, when the splitting got tough, the RPMs would go up, and so would the power of the splitter.

AR
 
Hey Greygoat: Sayin' you didn't have a manual for a given machine, how would you ascertain the actual "realtime" pressure output of any given system, be it a remote output fitting or, say, a lift cylinder elembent of a loader setup. Is this measureable on some kind of PSI guage, or are there additional calculations that need to be made once that type of reading is obtained? Short way around the barn: how would you calculate your loader's real or actual working lift capicity? Thankin' you in advance.... I think it would be useful to know when you might be overloading a system/askin' for trouble.
 
Thanks for the replys guys.To be more specific if you can help,is there a certain amount of power loss because the lift arms have to go up which would not be the case if the isolator valve was used,its the valve which goes under the seat and means you can stop the flow to lift arms.
 
Thanks for the replys guys.To be more specific if you can help,is there a certain amount of power loss because the lift arms have to go up which would not be the case if the isolator valve was used,its the valve which goes under the seat and means you can stop the flow to lift arms.
 
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