Posted by Paul from MI on January 05, 2016 at 19:59:17 from (204.106.248.120):
In Reply to: chain saw sharpeners posted by longmeadowfarm on January 05, 2016 at 14:08:14:
I built my sharpener copying the geometry of a Belsaw sharpener. I use worn out surface grinder wheels from work, #46 open grit wheels. They don't burn or overheat the chain. Maybe most of the overheating issues are caused by the wrong grade wheel? The HF grinders I have seen lack the rigidity of the professional grade machines, which makes them sensitive to operator technique. You can still o a good job, but it takes more skill. The only time I ever remove more than about .004" from a chain is if it has hit a rock or some iron. Then you have to take enough metal off each tooth to return to the original contour to make it cut right, an most likely will need to file the rakers too. I can usually use a chain down to when the teeth are less than 1/4" long, so I have no idea how many times I sharpen them before I throw them away, but it's a lot. And I use a caliper to be sure teeth on both sides of the chain are the same length. Keep an eye on the chips when sawing, if you see any sawdust, change or sharpen the chain. I'm not a hero at this, but I've been doing it this way for over 40 years and it has worked well for me.
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