On Tue, 23 Sep 2008 16:53:21 -0500, dpb wrote:

jim wrote:
...
I've never seen a saw burn wood to the point where it's smoking
unless, like Bub suggests - backward chain. ...

Try some about 20-yr dead ash sometime...


It doesn't have to be ash. My dull chain smoked at cutting fresh
pine, maybe it was the pine tar burning I don't know. But after
sharpening, cuts were easy with no smoking. A dull cutting edge
creates more friction, more heat.