Thread: Machinists - why are holes sometimes triangular?
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Moneyguy1 Moneyguy1 is offline
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Join Date: Sep 2001
Location: Tucson AZ USA
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Harmonics. Try drilling a number of holes in the same piece of material next to each other at different rpms and see what happens.
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Bob S. former owner of a 1984 silver 944
Old 03-29-2006, 10:13 PM
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