I have a small chain saw with a 14" bar. It takes an oregan s52 chain. I have been using it to cut maple and oak. Im not sure how to sharpen them not a skill I have learned yet, but the seem to be going dull REALLY quick. I get about 1/2 hour of cut time out of them before there dull. When I say dull I mean instead of wood chips i get saw dust, and the saw constantly wants to cut at an angle. If I put a new chain on it, it cuts like butter. I figure i get a small pickup load of wood before its completely unusable? Is this normal. Im not hitting nails and all the wood is up off the ground.