[chbot] Ultrasonic drill or pulsed laser anyone?

[Helmut Walle]

That's a fair question, Charles, and it had occurred to me, too, but... 
drilling a hole 20 times as deep as wide (and 63 mm deep in absolute 
terms) is probably not something they are doing often, and it may well 
require a different technique and tools than what they use.

Then again, there is no harm in asking them, and even if they don't have 
a solution they may know who has.

When I worked at an optician's shop a few decades ago I used a diamond 
drill bit to drill the holes in glass lenses when a customer needed true 
glass mounted in frame-less spectacles (where the temple hinges are 
bolted directly onto the glass). These holes were relatively small, 
maybe 1.5 mm diameter and only as deep as the edge of the glass was 
thick, usually some 3 to 5 mm. The drill bit had a metal shaft, and the 
actual drill part of the bit was a very nicely cut piece of diamond with 
an incredibly sharp tip and very sharp edges. But that kind of bit would 
not have worked for drilling a really deep hole, because the metal part 
holding the diamond tip had a significantly greater diameter than the 
diamond tip. The diamond tip was just long enough to drill through the 
maximum thickness glass there was...

Helmut.

On 17/02/2016 7:00 p.m., Charles Manning wrote:
> Why ask the Dolts with Volts and Bolts?
>
> Talk to the experts. There are people who make quartz pendants etc. and
> have been for years.
>
> eg. http://www.hetties.co.nz/
>
>
>
> On Wed, Feb 17, 2016 at 6:37 PM, Helmut Walle <helmut.walle at gmail.com
> <mailto:helmut.walle at gmail.com>> wrote:
>
>     Yes, he may need a diamond drill. But 63 mm deep at 3 mm diameter is
>     going to be interesting...
>
>     The problem with LASER cutting is that (crystalline) quartz is
>     highly transparent over a very wide spectrum, which is in conflict
>     with transferring energy from the beam to the material to be cut...
>     I don't know about ultrasound. How about water jet? Not sure...
>
>     Also, the quality of the cut will vary depending on machining
>     technology and tools used; so it would be good to know the purpose
>     of the whole affair to decide.
>
>     That's my 3 cts worth, and I am by no means an expert on this...
>
>     Kind regards,
>
>     Helmut.
>
>     On 17/02/2016 2:54 p.m., Mike Barnes wrote:
>
>         Hi Team,
>
>         Mate at work wants to drill a 3mm x 63mm deep holes in Quartzes.
>
>         Any thoughts?
>
>         Cheers
>         Mike
>
>
>         _______________________________________________
>         Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>         <mailto:Chchrobotics at lists.linuxnut.co.nz>
>         http://lists.ourshack.com/mailman/listinfo/chchrobotics
>         Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>         Meetings usually 3rd Monday each month. See http://kiwibots.org
>         for venue, directions and dates.
>         When replying, please edit your Subject line to reflect new
>         subjects.
>
>
>     _______________________________________________
>     Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>     <mailto:Chchrobotics at lists.linuxnut.co.nz>
>     http://lists.ourshack.com/mailman/listinfo/chchrobotics
>     Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>     Meetings usually 3rd Monday each month. See http://kiwibots.org for
>     venue, directions and dates.
>     When replying, please edit your Subject line to reflect new subjects.
>
>
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
> http://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Helmut_Walle.vcf
Type: text/x-vcard
Size: 149 bytes
Desc: not available
URL: <http://lists.ourshack.com/pipermail/chchrobotics/attachments/20160217/0ead3120/attachment.vcf>