Re: Electrodes (Re: Tungsten Rod)

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

Original poster: "robert & june heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

A  cut-off disk by dremmel is about the best I have found to cut  tungsten
and carbide with limited problems. Take your time, feed slow, hold steady.
    Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Sun, 01 Dec 2002 19:04:14 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Electrodes (Re: Tungsten Rod)
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Sun, 1 Dec 2002 19:06:47 -0700
 >
 > 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=P
 > DF
 >
 > 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
 >
 >
 >