Diagnosis from the Chain Doctor . . .
Received 2 chains from the OP today (.325 narrow kerf: one Carlton/WoodlandPRO; one Husqvarna/Oregon). Pretty standard stuff. Normally I say that you can't tell what is going on until the chain is cleaned, but in these cases, the caked on crud showed where the leading corners had scraped against something, and were abraded. This causes the cutters to be pushed away from the wood, instead of into it.
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Normally this problem is associated more with full chisel chain, but the same principle also applies to these semi-chisel cutters.
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Same chain after a relaxing bath at the chain spa - a little harder to see. This will simply be ground back to the original cutter profile, and then the depth gauges will be adjusted for the new cutter length. Lots of usable life left.
Some people like to complain that '
grinders take off too much metal!', but the damaged portion needs to be removed, whether using a grinder, a file, a rotary tool, etc. I have to wait for the weather to warm up a few degrees (13°F now) since I like to grind outside.
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Grinding can't help this tooth cut (but I really did not notice it until after cleaning the chain)!
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Philbert