Homebrew PCBs

At 01:29 PM 12/19/2008, you wrote:
>Does anyone know if I would get away with drilling glass with a
>standard tungsten carbide drill bit set. The spindle speed of my mill
>goes up to 60krpm.

i've drilled glass and ceramic tile and stone. you need to drill 
*slowly*. and spray repeatedly with water to keep cool and remove 
residue. i've used tungsten carbide bits (can get at home depot in a 
few sizes) and they do work but have a short lifetime. i got about 6 
- 10 holes per bit before wearing out. most of my drilling was in 
1/4" glass and granite, so i don't know what thickness you intend. 
diamond bits are better, but still require water to last.


William Alford

GI Motility Medical Research Page
http://alford.grimtrojan.com/  

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