Spatula Tzar, who brought us the controversial fly plane, offers a number of other interested projects, including this ball mill (a device used to crush metals and chemicals into a fine powder), made from mainly junk lying around the lab.
Ball Mill
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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.
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United Nuclear also has plans for a ball mill on their site. Or, they’ll sell you a commercially made one.
But you should make your own on principle.
http://www.unitednuclear.com/ballmill.htm
it doesn’t take much to spot a pair of shopping cart wheels hmmm…