[joelchrisman]

http://hacknmod.com/hack/turn-a-dead-hard-drive-into-a-grinder-or-sander/

now why didnt I think about that. now where is that box of 20g drives i have sitting around:

 

[Hemp]

Interesting. I can't imagine there being much torque with a motor that small. The hard drive discs are very smooth ceramic. With a little diamond rouge or buffing compound i bet you can sharpen small blades and razors extremely well.

 

[joelchrisman]

that was my thought. or some 1000 grit sandpaper