On Wed, 20 Jun 2018 13:46:47 -0500, Terry Coombs
wrote:

On 6/20/2018 10:25 AM, Jim Wilkins wrote:
We're getting into uncharted territory
here for me , I'm open to suggestions - that pertain to the task at
hand , please .

Perhaps you could explain to her the advantages of a press fit in a
bored hole.


* Or a simple collet ...

I'm a glass blower so maybe I can add some useful content.

The "advantage" of a press fit is that when at operating temperature,
the tungsten will fall out. SS has a pretty high temco; Platinum
almost zero. Pt is near enough to quartz that Pt and quartz can be
fused together to make gas-tight seals.

The bored hole/sweated fit is a good idea except that the glass artist
will want the handle to be a small a diameter as possible.

The best way to do it is just a simple silver-soldered butt joint.

You should be able to get it close enough on the runout with
hand-holding. If not, the V-block idea will work well.

Don't try TIG - much too hot and will sublime constituents of the
silver solder. A MAPP gas torch is fine. I do mine with an
oxy-hydrogen burning Mini-Torch just because I already had it. That
is too hot up in the flame cone but the penumbra of the flame is just
perfect.

John
John DeArmond
http://www.neon-john.com
http://www.tnduction.com
Tellico Plains, Occupied TN
See website for email address