I don't use electric grinders. I use a bar mount chain saw sharpener that was designed by guy named Granberg some 35 yrs ago. I suspect mine is probably about that old. You can pick the File-N-Joint up for about 27 bucks. If you are not familiar with these, they clamp on the bar and hold your file at correct angle you chose (2 planes). I think the electric grinders take too much steel off, and your chain life is probably less too. Of course, they may be the cat's meow if you have serious damage and need to grind off a lot of metal. I can sharpen a chain pretty quickly with this simple, but accurate mill. When my brothers and I are out sawing , they are always duping me into sharpening their chains. All it takes is dipping your saw into some dirt and you are dull...so it is best to be efficient at sharpening the chain in the field. For some reason my brothers never quite got good at using this mill, but for me...I seem to do pretty good with it. Just keep good , clean files on hand. I guess if you are going into the sharpening biz, then an electric grinder is more impressive. What counts is the end result and satisfied customer.
