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core drill bit

Stone Conversations : Archive 10 : Message 00241

From: "Irwin Stone" <irwinstone@zzzzzzzzz>
Date: Mon, 7 Nov 2005 08:36:44 -0500
Subject: core drill bit

Is the butt end seated fully against a flat machined hub on the grinder? I
always have a machined spacer about 1/4" thick on the drill/grinder shaft
before mounting a core bit. If the bit's threads are bottoming out before
the flat end seats against the drive tool, the bit will have a lot of
runout.

David

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