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Old 09-11-2011, 06:53 PM
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evaldart evaldart is offline
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Join Date: Oct 2006
Location: easthampton, massachusetts
Posts: 5,637
Re: Blue Alabaster destroying my drill bits

Diamond coring tubes indeed. Very fast material removal (no hammer action, of course). Variable speed (the larger the diameter the slower the drilling). Wet or dry. I buy them from
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