Does belt sharpening damage edges?

[grepper]

Thanks for that interesting, informative and illustrative article on what can happen if steel is improperly ground and grossly overheated during high speed grinding.  I can just imagine that tap getting about half way in and snapping off.  Ever try to remove a broken tap from a hole? 

Good thing nothing like that is happening when we sharpen our knives.  I'd hate to see my knife shatter into a pile of shards then next time I chopped a carrot!