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 Post subject: Working in glass
PostPosted: 16 Jun 2013, 12:15 
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Joined: 02 Mar 2009, 12:41
Posts: 1063
Location: Vänersborg, Sweden
I guess most people in here agree when I say that a chassis of glass is a bad idea. Still glass intrigues me a lot and I am tempted to give the silicon material a try, but not as a part of the chassi but as a decoration.
There are amps to be found that has a sort of decorative cover with the tubes sticking up through holes in the glass. But how were those holes made? Guess the Japanese still haven't invented an electronic hole that can be placed where ever a hole is needed. Missing the spot, you simply move the hole a bit... :thumbsup:

I guess that the most contemporary way of making holes in a piece of glass is to use THIS KIND OF TOOL. Using light pressure an stable drill stand an infinite amounts of cooling will do the trick. If possible the glass may lie in a container drowning in water. That way the nasty glasspowder is trapped in the water and not in the lungs.

I read about two other tricks. One was to use acork in the drill with a layer of fine sand underneath and let the sand do the work. Another, picked up in Russia used sand as well, but the sand had to be layed out in a ring, the size of the desired hole, doused in petrol or alcohol and the liquid set on fire.

However the special drill above is, I understand, the best option.

Image

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 Post subject: Re: Working in glass
PostPosted: 20 Jun 2013, 07:51 
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Joined: 06 Jun 2008, 18:23
Posts: 4950
Location: Australia
Magnus, you can have that one on your own. I'm having enough trouble drilling 2mm Al and timber and lately ABS plastic.

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 Post subject: Re: Working in glass
PostPosted: 20 Jun 2013, 08:13 
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Location: Chilliwack, BC
*imagines all kinds of LED colours lighting up the glass* :D

Unless the glass is tempered, I'd be worried about nice hot glass + someone slops their frosted margarita *crack* :hot:

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 Post subject: Re: Working in glass
PostPosted: 24 Jun 2013, 05:45 
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Location: Vänersborg, Sweden
mwhouston wrote:
Magnus, you can have that one on your own. I'm having enough trouble drilling 2mm Al and timber and lately ABS plastic.


I recognize that problem. You have a drop-through transformer med holes for 5 mm screws (M5). When the big square ( :confused: ) hole in the top plate is finished the four monthing holes are never ever ever aligned, so I drill them 6 mm .... and use small file for tghe last few half millimeters .

I simply have to get me a piece of scrap glass and do some trials. Then I can try to fins some tubes that don't get too hot.

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 Post subject: Re: Working in glass
PostPosted: 09 Jul 2013, 15:24 
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Joined: 31 May 2013, 13:34
Posts: 33
Location: Near Napa
For making extremely accurate, fine finish holes in glass and all sorts of hard materials, for a mere $650K you could just get one of these: :)


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 Post subject: Re: Working in glass
PostPosted: 09 Jul 2013, 16:35 
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Joined: 04 Jun 2008, 20:59
Posts: 3814
Location: Arizona, USA
Hi, I'm with Mark on this one....I have plenty of problems drilling in metal, wood and especially plastics. I figure glass is made for wine and beer glasses and not much else except tube bottles in audio.

Good listening
Bruce

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 Post subject: Re: Working in glass
PostPosted: 09 Jul 2013, 22:20 
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Joined: 08 Aug 2009, 03:11
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Location: Chilliwack, BC
grymster wrote:
For making extremely accurate, fine finish holes in glass and all sorts of hard materials, for a mere $650K you could just get one of these: :)


<Bill Cosby>

*asks grandma*

Well let me just go over to my purse...

Well lookie here, $650,000!

</Bill Cosby>

:D

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* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
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 Post subject: Re: Working in glass
PostPosted: 10 Jul 2013, 01:54 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Mr Cosby can afford a glass cutter, not that he really wants one mind.

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 Post subject: Re: Working in glass
PostPosted: 10 Jul 2013, 07:30 
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Joined: 31 May 2013, 13:34
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Location: Near Napa
We usually use glass cutting holesaws (as in Soundbrigade's link) or diamond endmills. Sometimes we'll use waterjet.

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 Post subject: Re: Working in glass
PostPosted: 12 Jul 2013, 09:52 
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Joined: 02 Mar 2009, 12:41
Posts: 1063
Location: Vänersborg, Sweden
Had an aunt and her niece on visit a week ago - helped them with their corset projects (I have many strings on my lyre (Swedish expression). Auntie runs a glass business and she said that they used my kind of drill, working very slowly and every now and then lifting the drill a little to let water penetrate and cool things off.
If used as a cover for tube amps, she recommended me to harden the glass before using it in the amp, thus making it withsatnd the high temperatures.

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