Bart
If you are having a chain go dull that quickly there could be one of a few
things happening, most of which involve too much heat build up.
(1) the most obvious cause is too much grit in the bark, usually caused by
small stones and other debris getting on the log when it was felled.
Brush the log and try again.
(2) a lack of lubrication on the bar will make it heat up and ruin both
chain and bar. Make sure the bar oil is the right consistency for the season
and that it is flowing well. If your bar allows for it, grease the tip
sprocket at every filling.
(3) make sure you cut through at an angle that allows the chips to clear,
about 60 degrees is right. The long shavings that are made with this type of
cut can clog the drive cog and cause heat and dullness.
(4) certain woods dull a chain faster than others. Cedar is notorious for
this. The boys I know who cut cedar for a living will sharper three times
more than the fellows who cut hardwoods.
hope this helps.
See a general procedure at http://aroundthewoods.com/firewood.shtml


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God bless and safe turning
Darrell Feltmate
Truro, NS Canada
www.aroundthewoods.com