Originally Posted by
Beaver
No way is it worth fucking around swapping a chain instead of sharpening it. It takes about 11 minutes to sharpen a saw - 2 to roll a doobie, 5 to smoke it and 4 to file the saw.
If you're cutting standing or freshly dropped wood you should be able to cut a truckload without sharpening. If you're cutting skidded wood you'll probably need to sharpen often (once per log?). If you're driving your tip into the dirt or dont know how to file a saw you'll need a new chain every cord.
I learned to freehand sharpen about 30 years ago slashing runs at the ski hill for 4 summers. Then I heated my house with wood for 25 years and sold firewood for extra cash too many times so i got pretty fucking good at keeping my saw sharp. Typically I need 3 strokes per tooth and its razor sharp. If I tagged a rock, next sharpening one or 2 teeth might get 4 strokes and left a little gnarly. It's important to file them all the same. Same angle, same number of strokes, same pressure. I usually only hit the rakers once in a chain's lifetime.
I was walking up the road last week listening to someone cutting with his chainsaw and thinking it sounded dull, there was no chain bite causing the engine to actually work. Turned out to be an aquaintence, i was chatting and looking at the dust he had made and commented that it looked like his saw was dull. He pulled out a little grinder thing, proceeded to take off way too much metal and only half ass sharpen his chain. He didn't have a flat file and his rakers were too high. I shrugged.