What type of rotor are you talking about? Like a brake rotor for a motorcycle?
I was thinking of a small car, disc brake type. I don't see why a motorcycle rotor wouldn't work though. It was something I read about a while back where some knife maker was making knives out of truck rotors. Made sense to me when I read it. Then again, I wasn't making/building anything from them and didn't have to worry about specifics.
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