Re: Electrodes (Re: Tungsten Rod)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr.Resonance by way of Terry Fritz <twftesla-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


Resonance Research Corp offers nice 1/2 in dia screw in tungsten tips with
3/8-16 NC thread.  Price at $13.50/pc.   We thread them into 1/2 in dia x 1
3/4 axial brass rod that is pressed into 1/2 G-10 plate rotor.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, December 02, 2002 6:07 PM
Subject: Re: Electrodes (Re: Tungsten Rod)


 > Original poster: "marc metlicka by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>
 >
 > Yes terry was right that i had the best luck with carbide cutting tools
 > and end mills, but i think terry found the exact bullet shaped drilling
 > tips used in oil drilling or something? i think he quoted $10.00 each at
 > that time. i'm sorry but my "doo dads are us" store has been looking for
 > some for me, but nothing yet. i'll offer as soon as available. there are
 > many many different shaped cutting tools that should modify nicely with
 > some ingenuity.
 > Marc M.
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
 >  >
 >  > Hi,
 >  >
 >  > McMaster-Carr has tungsten alloy (90W 6%Ni 4% Cu) rod at:
 >  >
 >  >
 >
http://www.mcmaster-dot-com/cgi/loadpage.cgi?pagenum=3357&catnum=108&forceFormat
=PDF
 >  >
 >  > Or try
 >  >
 >  > http://www.mcmaster-dot-com/
 >  >
 >  > and search on tungsten. Its the top ones for "high density tungsten
carbide
 >  > rods"or try to get to page 3357.
 >  >
 >  > They have from 1/8th inch to 2 inches in diameter (for larger coils
 >  > :o)))  It says it is "machinable", but I imagine it is darn tough!
 >  >
 >  > 12 inch long 1/4 inch rod goes for $38.00  12 inches of 2 inch rod sets
you
 >  > back $790.
 >  >
 >  > They "say" the melting point is 2012F (maybe they meant C?) which seems
 >  > kind of low.  Pure tungsten is 6192F.  I think these rods are made in
an
 >  > odd powered sintered process so maybe the melting point is low.  I
could
 >  > not find melting point information in a quick net search.
 >  >
 >  > The tungsten bare drill rods have very low tungsten content, but maybe
that
 >  > is the material Marc had so much luck with?  That is what they use for
 >  > cutting tools on page 3359.  With an R/C harness of 44/66, good luck
 >  > cutting it ;-))  I imagine that is well within the EDM, waterjet,
plasma
 >  > cutting territory, although, a cobalt tipped hack saw may have a small
 >  > chance.  Cobalt rod I know will just shatter (guess how I know that
;-))
 >  >
 >  > Cheers,
 >  >
 >  >          Terry
 >  >
 >  > At 08:16 PM 12/1/2002 -0500, you wrote:
 >  > >Way back Marc Metlicka had some nice tungsten carbide electrodes for
 >  > >sale.  There are pics at:
 >  > >
 >  > >http://www.fortunecity-dot-com/meltingpot/syria/1210/1c120580.jpg
 >  > >
 >  > >Anyone know where to get anything like this?  A bulk buy, maybe?
 >  > >
 >  > >         - Bill Vanyo
 >  > >
 >  > >Tesla list wrote:
 >  > > >
 >  > > > Original poster: "Dave Leddon by way of Terry Fritz
 >  > > <twftesla-at-qwest-dot-net>" <leddon-at-attbi-dot-com>
 >  > > >
 >  > > > After firing up the old SRSG with a pig for the first time, it
quickly
 >  > > > became apparent that 1/8 inch tungsten electrodes just weren't
going
 > to get
 >  > > > it, so I'm now trying to locate a source of ¼ inch tungsten
 > rod.  McMaster
 >  > > > has some tungsten/carbide rod listed but I don't know how suitable
this
 >  > > > would be compared to pure tungsten.  Any thoughts or suggestions
for
 >  > > > sources and materials would be appreciated.
 >  > > >
 >  > > > Dave
 >
 >