It’s pi time (x) the bore, times (x) the hydraulic pressure.
The surplus center has the hydraulic pumps and cylinders you match the pump to your engines hp.
My last homebuilt splitter was a 5” bore x pi 3.1416= 15.07 x 3,000 psi= 47.124 tons. What she didn’t split she cut through it.
I built a 32ton splitter with a 3,000psi with a 3.5” bore cylinder for 25 years homemade. My only problems was the free I beam was too thin but a sledge hammer would fix it when it bent but not often.
I have extra I beams here is anyone in ct or nearby is interested affordable.
When I bought my house with old woodstove(since upgraded), I started cutting my own firewood and bought a small, electric 4 ton splitter. It is an awesome machine and has split over 50 cords of wood.
surprising what it could do. I use it to do small amounts or kindling or indoor splitting now.
I've since bought a Forest King farm model hydro splitter rated at 30 tons.
I know it can't be pushing 30 tons of force at the blade so its definitely false advertising.
It does good though and was on sale so I'm happy with it.
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Thats actually a yes and no answer. I have never tested this, but observation has led me to believe that most box store splitters are supplied with just enough engine to run at full load without stalling. In this situation the motor will slow rpms as the pump pressure increases. This is the point where a little more hp will decrease cycle times due to the ability to maintain rpms and pump flow. Now how much this small amount of rpm and flow will decrease cycle times isnt as important as is that little extra "speed" worth the cost. While the cost of a 1 or 2 hp bigger engine is a small, one time, cost, the every day cost would have to include the extra fuel needed every day the machine is operated. Or in my case is the faster cycle time worth more to me than being aggravated waiting on the cylinder to return. My splitter is way over powered with a 25 hp kholer and 28gmp 2 stage pump and I wouldnt want to swap the motor out for a smaller one even tho the math says I can.SO Many times I get asked if I put a bigger engine on my existing splitter will it cycle faster? No. More speed requires a larger flow, which then takes more horsepower to turn that larger pump at the same maximum pressure.
I would be more impressed if you said a 23" elm or oak crotch. It does not matter what dia the wood is if it is straight. I have done 43 " pine rounds. Does that indicate that I have a super splitter----no.I have a TSC Countryline 25T I picked up on sale for $900. It has split everything I've put in it, 23" ash rounds included.