[Shop-talk] What to do with worn grinding wheels?

[eric at megageek.com]

I was wondering if anyone had any creative ideas for used and worn 
grinding wheels / stones.

I'm sure we all generate alot of them, what do you do with them?

If the arbor sizes were standardized, it would be great to move my 9" 
wheels to my 6" handheld!  8>)  But no such luck?

Do you guys recycle them somehow?  Or just chuck 'em?

Eric P
"Be as beneficent as the sun or the sea, but if your rights as a rational 
being are trenched on, die on the first inch of your territory." Ralph 
Waldo Emerson