Re: What type of "Grinding Bit" are these??
- From: "Harold and Susan Vordos" <vordos@xxxxxxx>
- Date: Wed, 8 Feb 2006 19:53:40 -0800
<spamTHISbrp@xxxxxxxxx> wrote in message
carbide burr? Rotary file?
google these phrases and you'll get a hatfull of pages.
Also, avoid using any kind of abrasive to open a hole where there isn't one
unless you're trepanning. The center of any stone has little to no surface
speed so it won't cut efficiently, regardless of the speed it's driven.
Grinding wheels, or mounted wheels such as you're discussing, behave soft
when driven slowly, so instead of grinding, they slough off, destroying the
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