I had a large oak tree cut down in 2005 and had them cut the trunk into
6-foot sections, planning to cut each into 18-inch quarters for splitting
into firewood. In retrospect, it would have been better to have them cut up
the trunk but it's too late now.
I've whittled away at the branches over the years and finally got around to
the trunk segments. These are about three feet in diameter at the bottom and
end up about two feet in diameter at the other end. I've cut a few segments
and split them, but this stuff is tough! The wood stayed hard in the center,
didn't decay, probably because of the thickness, and when I hit the heart
wood, it dulls my chain real quick.
The largest segment has three partial cuts around the circumference, but the
parts are still joined in the center. I was thinking of pouring water into
the groove that I've already cut in hopes that it might soften the core. Any
Good chain saw, sharp chain. It's what they are made for and do. If you
are having a problem, there's something wrong with your equipment.