Reply by REO

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Posted on chainsaw bars

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928 posts in 2097 days

#1 posted 04-16-2013 05:58 PM

dull chains wear out the bar. as a chain wears often individuals and those who sharpen commercially forget to maintain the geometry between the tooth and the raker. the chain takes a smaller chip and people start to push to regain rate of cut or think the chain is dull again. I routinely took the raker down a bit farther even when new. The saw would cut bigger chips and much faster with no pushing. I set the oilier up a little heavier on those saws I could (just a little). some saws use a pin against a lobe on the crank these can wear out. the spring pushing the oiling piston back gets weak also so the oilier works good at slow speeds but at high speeds it just bounces. the grooves are deep enough on most blades that they can be flattened out a time or two. never put a used saw chain on a new bar! buy three new chains and have them sharpened at least twice before introducing the bar to an old chain. putting an old chain on a new bar will wreck the bar right off the bat because the contact surfaces are worn the bar is nice and flat but the chain has worn to an angle. there is no surface are for the oil to work on so the bar will wear prematurely.

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