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Super Member
Most of the cheap grinders spin too fast at around 3600 rpm. The ones we have at the shop spin at 1800. You can thwart the heat somewhat with a grind wheel crayon.I do have to ask how much you actually use your saw after this statement.
When I was about 5 - 10 years younger (before I was retired), when I went out to cut wood I would take 4 freshly sharpened chains with me (that I had sharpened the evening/night before) so I could get back to work quicker than if I had to stop & sharpen. Over a period of a week, that would be 24 chains I had sharpened - that if I didn't sharpen them, would really eat into my profit margin and have me buying many more chains so I could send them out.
Please don't take me wrong, I am NOT saying sending chains out to be sharpened is a bad thing - God knows, I still get quite a few to supplement my retirement! What I am trying to convey however, is that it might be better to sit down with someone and let them show you how easy it is to sharpen your own chains - most folks will do it for a good meal. Files are cheap, and even for beginners it shouldn't take more than 15 - 20 mins to sharpen anything that has less than a 30 inch bar/chain. Plus, as you stated, using a power grinder/sharpener can cause loss of temper if you (or your sharpener) aren't sharpening correctly with that piece of powered equipment!
Just my curiosity raising up again!
We now use the $26,000 Franzen chain grinder which is totally automatic. We get $12 to sharpen chains.