As odd as it sounds, Butte Jewelers on 53 W. Broadway sharpens auger blades as well. I started taking my auger blades to them last year and the guy does a real good job at a very reasonable rate. He did all mine while I waited. My auger blades are for an Eskimo and they are of the "serregated" type, so they arn't particulary easy to sharpen in my opinion.