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Starting a core drill hole

Stone Conversations : Archive 10 : Message 00028

From: VisualThinker7@zzzzzzz
Date: Mon, 3 Oct 2005 23:34:53 EDT
Subject: Starting a core drill hole

Doesn't a core bit with a center guide drill require much more energy for
drilling?

Simon, I was wondering why your core bits do not have a center guide drill?
Does yours have one Norman, maybe you left it in the box? Mine have them,
the guide bit just press fits in to a center hole.

daed

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