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Old 10-23-2012, 11:42 AM
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I like a variable speed electric drill (I suppose they make a variable speed air drill). Using a drill bit at high speed creates heat. Heat is the main reason drill bits get dull. Drilling at a slower speed, and maybe using some oil on the head of the bit will allow your drill bit to stay sharper longer because you're not getting it so hot.

Jus' sayin'

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