[Hallicrafters] drilling glass

[Paul Kraemer]

Drill bits specifically for drilling glass and ceramic tile are readily 
available at Lowes, Home Depot and Menards for about $8 each.  Sizes from 
1/8" to 1/2" in either two or flute point.
Work very well on ceramic tile and cement board
Paul K0UYA

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From: "Mark Shaum" <k9tr at btsnetworks.net>
Sent: Thursday, March 20, 2014 1:16 PM
To: <hallicrafters at mailman.qth.net>
Subject: Re: [Hallicrafters] drilling glass

> One tip I recall when I last had to drill about a 1/4 inch hole through a 
> fairly thin glass sheet was to use putty to form a little ring around my 
> drilling center point.  Then you can fill your little putty "volcano" with 
> lubricant/coolant and drill with a sharp, carbide bit at slow speed and 
> slow feed.  This helps keep the lubricant and glass particles flowing away 
> from the hole as it is drilled without having to drip lubricant on the 
> glass on a continuous basis.  Clean out the hole as drilling progresses, 
> continue as in the beginning.  I must admit I only did this twice, once to 
> test the technique and once to get the hole I needed through a glass 
> window pane, but it worked fine both times.
>
> 73!  Mark, K9TR
>
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