[Jewelry making - Article 00186] - Re: [Orchid] Broken drill bits remover

[James Binnion]

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    Send it to the refiner, Tungsten Carbide is not soluble in anything
    that I am familiar with. The Alum, pickel trick only works on steel
    bits. Save the carbide bits for use on hardened steel or other
    difficult to drill materials. Use only in a drill press with a
    rigidly clamped workpiece and lots of lubrication and very high
    speeds. They are very hard but also quite brittle and the slightest
    wrong movement will break them. 

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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