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These common aluminum lathe turnings are special only because I made them using a tungsten carbide lathe bit that I had made myself from tungsten carbide and cobalt powders. You can read how it's done in my Popular Science column.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 8 February, 2009
Text Updated: 8 February, 2009
Price: Trade
Size: 2"
Purity: 99%