I bought a "railroad" grinder off of ebay to grind my chisels and plane irons. Its super heavy and very well made. I opened it up to check the gears and grease them. I was not prepared for the weight of the outer casing when I pulled it off and dropped it on the concrete floor - you guessed it. It broke off the most critical part of the casting - the part where the shaft for the grinding wheel goes through. Its only one half. The other half is intact.
I was wondering if there is some form of epoxy that could be used to repair the casting. I don't think I'll have much luck chasing down a welding shop for this small job. Since its hand held and there is not much heat generated, I don't think it will take a lot of strength to hold it together.
Bob