Re: Log splitters

Posted by Bus Driver on July 18, 2002 at 17:18:16 from (65.165.153.187):

In Reply to: Log splitters posted by Randy on July 17, 2002 at 00:44:49:

I built one in 1980. Used 5 1/2" dia cyl with 39" stroke. New surplus probably for Engineers bulldozer. I think anything less than 4" dia will prove inadequate for wood with knots. Anything over 6" dia. will have very slow "fill times" due to the volume of the cylinder-plus the weight involved. Another factor is the engineering consideration known as the "slenderness ratio of a column". Lots of home made splitters in this area would up with bent cylinder rods due to ignorance of this factor. Another consideration is inadequate size of supply piping to the pump. Cavitation will destroy the pump rather quickly. Some of the manufactured units do not have good engineering, so they do not always represent good examples. Mine has the beam (horizontal) so that the lift will lower it into a shallow ditch to permit easier loading of really big stuff. I split some oak 52" dia. I also placed the (stationary) wedge with 1 3/4" clearance from the pusher block when the cylinder is fully extended. Think it was a wise decision. Study carefully the factors I mentioned and you should have a superb unit. Educate your self on hydraulics before buying components or designing. Surplus parts will sharply reduce the cost.

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