Reason I finally got a grinder last winter was after using the Granberg and hand filing, chains eventually, for me, get off as to length of cutters, etc. and no way I wanted to spend the time with a micrometer.... Not for chains. Plus, now and then you hit that little stone in the tree or a nail or something that buggers up a few teeth. Fixing that stuff by hand is a pain. I figured that either I toss those chains or take 'em in at $8 a pop plus gas/time. Got the grinder for those times, don't regret it though I still do my daily touch-ups and fine tuning with the Granberg. It's fast, simple, and effective. Chains that get a bit out of whack I set aside til I get time and then go to the grinder to get 'em back in sinc. Some people just toss the chains into the recycle bin; I'm one of those folks who doesn't like to toss an otherwise ok chain. Bugs me. So, the grinder. Worth the investment?? One could argue it either way, but I've got it so the argument to myself is over. But either by hand/eye or Granberg-style guide you can do a real good job for the cost of a few files.
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