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There is a very active Alaskan Chainsaw Milling group on Facebook. You will get some good info there.
I cut that size often. Maybe 4-7 a year. Most are 4’+ with the largest being 79” of burr oak. The biggest problem I see with the csm’s running a double power head is what if you don’t make it through on a single tank of fuel. We routinely have to stop for 2-4 fill ups. 30-45 minutes a cut is normal. Small stuff (3-4’) is no problem on a single cut and a single tank. (Image hidden from quote, click to view.)
I use an stihl 880 with either a 59” or a 72” bar. The 59”, what we started with, we had a custom made mill out of 1” steel hollow square stock and the 72” has a Gran berg mill. Both run on a precision milled 1”x3” solid aluminum stock guide 11’ long. There is no flex in it. Has holes drilled in the “rungs” to use bolts to lock but it into the correct height to make it stable for the first cut.
Offrink, do you use a winch to keep from diving and climbing?
Wanted to update all those following this as I've been in learning mode this last week. What I'm finding out is that the double powerheads really don't offer much in the way of additional power, the second powerhead only takes up the slack. This is right from Granberg, and it really changes my thoughts on this setup as I did want to run 2 powerheads, hoping to drastically reduce my time per cut in longer/wider logs. What they're recommending is to stay with the single 880, put the roller handle/oiler on the far end, and obviously use the correct chain. If any of you have swapped from either a single 661 or 880 to a double powerhead setup I'd be keen to hear your thoughts on the difference in cut speed.
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