noneck180 wrote:If someone ever put any of my knife blades on a belt sander or grinder to sharpen them, they would be buying me a new knife. Stones and diamonds only for this guy.
I understand what you are saying, and I know the feeling. BUT, that being said, you might not want to throw out the baby with the bathwater...
Most knives are made and finished with belt grinders. It's all about who's using it and their technique.
Before the argument of "de-tempering" comes up (might as well squash this now), this is only an issue for an in-experienced sharpener (aka someone who doesn't know any better). If you ever get the blade hot enough to de-temper it then you need to practice more before accepting money for sharpening. I've seen some real butcher jobs come from companies with reputable sounding names, so regardless if your sharpener decides to use stones or belts for your blade, it's best to (as with all things knives) find out their reputation first.
All things equal though, you can usually get a better edge using stones and that's how I finish 99% of all my jobs, not to mention there are finishes that belt sanders can't give you. Rarely will I ever actually give someone an edge that came straight from a belt sander.
So again, we arrive back at the argument. Here's how it's supposed to be (in my honest opinion).. belt sanders are better for working on the "blade", stones are better for the "edge". Setting a bevel and thinning with a belt sander work just fine if you know what you are doing.