cn at q.com
Sat Jul 2 15:21:52 MDT 2011
If you do a Google search on "copper tungsten alloy" you will get mondo
pages for mfgs. I don't remember where I got mine. You only need to
cut off about 1/2 inch to make the actual electrodes, then press them
onto threaded brass tubing to adjust the gap.
> Carl Noggle wrote:
>> You can get alloys of copper and tungsten, in the range of 10% to 20%
>> copper, which machine almost as well as free-machining brass. They
>> perform as well as pure W. My main gap has two hollow electrodes
>> made from 1 1/4 diameter stock with a 1/2 inch hole for forced air
>> (blowing radially inward). After about 20 years of use, I can't see
>> any sign of wear. Actually, brass does quite well also.
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