I've only seen 0.025 gages - for the Oregon 72 chains I've been using. What does the lighter bite get you - faster chain speed?
I found my Oregon sharpener (w/ factory wheel) can overheat the chain's cutting edge leading to a chain that dulls more quickly than a factory sharp new chain that is touched up w/ a file. I've tried spraying w/ WD40 to cool the tooth before grinding and also after, it doesn't seem to make much difference. In another post, I asked if others have seen the same effect (from machine grinding) and got a chorus of 'file it by hand' or 'learn to sharpen it w/ a file'. I usually machine sharpen after half to a dozen file sharpenings (depends if I'm doing a lot of sawing).
