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4hv.org :: Forums :: Tesla Coils
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Tungsten cutting

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omegalabs
Thu Jul 03 2008, 09:31PM Print
omegalabs Registered Member #1521 Joined: Thu Jun 05 2008, 10:46AM
Location: Hungary
Posts: 128
Can someone tell me, how can I cut tungsten rods (for spark gap) fast? I try it with angle grider, but is a little slowly... A video : Link2
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Coronafix
Thu Jul 03 2008, 10:52PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
first hit on Dr Google Link2
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Fri Jul 04 2008, 03:30AM
Registered Member #1482 Joined:
Location:
Posts: 2
If you have a reciprocating saw ( A SAWS ALL) its easy. Just go to the hardware store and buy the blade that is coated with carbide. Its made just for sawsalls and fits right in. Thats how I have cut tungsten before and it worked fine.

Cutting a groove and cracking it sounds like it wouldn't leave a smooth edge but I haven't done it before.
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HV Enthusiast
Fri Jul 04 2008, 04:00AM
HV Enthusiast Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Don't try cutting it.
You need to score it, and then break it (like glass)

You can then file the end down to get it smooth.
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omegalabs
Fri Jul 04 2008, 10:07AM
omegalabs Registered Member #1521 Joined: Thu Jun 05 2008, 10:46AM
Location: Hungary
Posts: 128
Well thanks the answers, I try it next time :)
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Hazmatt_(The Underdog)
Fri Jul 04 2008, 08:08PM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
I use diamond wheels to cut tungsten, I also make sure the wheels stay wet while cutting.

I wouldn't suggest cutting tungsten with carbide because "carbide" is tungsten carbide, there you have two materials with relativily the same hardness.

I'm not sure you can file the end smooth with a file either because files are made of tool steel which is no match compared to tungsten. To smooth it out you'll need to use another abrasive or abrasive wheel like Aluminium Oxide abrasive or Garnet. Bare in mind that the Oxide wheels and Garnet will get chewed up pretty fast. Also, there is a warning with tungsten electrodes containing 2% Thorium, so when you grind it try to minimize contact with the dust.
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Rollingblackout
Sat Jul 05 2008, 05:46PM
Rollingblackout Registered Member #1524 Joined: Sun Jun 08 2008, 05:25PM
Location: Grand Junction, Colorado
Posts: 38
I use a plasma cutter and if your good with one its very fast and leaves a nice finished end.
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Andyman
Sat Jul 05 2008, 08:00PM
Andyman Registered Member #1083 Joined: Mon Oct 29 2007, 06:16PM
Location: Upland, California
Posts: 256
Aluminum oxide is too hard for grinding tungsten believe it or not. You actually need a softer wheel such as a green silicon carbide wheel. They're more expensive and wear away faster, but they cut the tungsten like magic.
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