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Re: Drilling through a magnet?
If the magnet is shiny like so many in the inexpensive speakers, it is probably Alnico. That's Aluminum-Nickel-Cobalt-Iron. It's hard, somewhere around 45-50 on the Rockwell C scale. Some hard objects are machined, but the cutting geometry of a drill bit isn't suited for it.
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Richard Linn
Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005
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