Re: Drilling Ceramic

From: Dwayne (ddc762_at_yahoo.ca)
Date: 02/23/05 

Date: Wed, 23 Feb 2005 23:34:49 GMT

"Mark Thorson" <nospam@sonic.net> wrote in message
news:421CE8B8.E8D05A35@sonic.net...
>I need to drill an array of holes in a ceramic (Macor) plate.
> Each hole will be drilled from both sides, not breaking
> through either side. The holes are differing diameter.
> Should I drill the larger diameter first, and then break
> through the bottom of the hole from the other side
> with the smaller diameter? Or should I drill the smaller
> diameter first, followed by the larger diameter?
>
I'm assuming that the remaining material is going to be fairly thin. In
this case you should drill the large holes first. Removing less material on
the second pass should help prevent the remaining material from cracking.

Dwayne

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