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Grinding tungsten tip from a newbie

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Re: Grinding tungsten tip from a newbie

Postby Poland308 » Mon Sep 04, 2017 4:55 pm

Done x ray work! I'm with Oscar. It's relative. But not required for every job.
I have more questions than answers

Josh
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Re: Grinding tungsten tip from a newbie

Postby Futterama » Tue Sep 05, 2017 2:42 am

Thanks, I have had some arc start issues which I thought were from tungsten issues, but it turns out not to be related to the grinding process. So I have been overly careful with the grinding even though I'm a hobbyist.

I will use the same "wheel" for all my tungstens, and I will have course grit for the big stuff and a finer grit for finishing. At the moment I'm using plain sanding paper, which is cheap to replace and when replacing it, I'm sure to get a new clean sanding surface, free of material from previous tungsten dipping mistakes :lol:
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Re: Grinding tungsten tip from a newbie

Postby Graveyard » Tue Sep 05, 2017 8:11 am

I broke down and bought an entry level tungsten grinder. It's a Tech South brand, non adjustable. It was about $230 I believe, after grinding tungsten on a wheel for years and having to walk back and forth from the welding table to the grinder this thing is the cats ass. I hang it right on he table and if I touch or gum up the tip I can just reach down and sharpen it. Had it for almost a year and I wouldn't go back. If your a hobbyist it's probably not really worth it but if you're welding every day or even several times a week I recommend spending the money. I was apprehensive for a long time but now that I have one I don't regret it for a second. I like all the ideas you guys have, budget sharpening at its best!!
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Re: Grinding tungsten tip from a newbie

Postby Gavin Melville » Tue Sep 05, 2017 2:27 pm

This is a diamond wheel, well actually CBN. The diamonds are on the back for a few mm as well. The wheel is so smooth that you can touch it with no skin lost. The alignment turned out to be perfect, no shims or eccentric washers. I use the 45 deg face against the rest to get the basic shape (yes I know), and then clean up using the front or back flat. Despite the very fine diamond grit the grinder is able to remove enormous amounts of Tungsten.

The wheel came from here, which isn't going to help anyone, but the type will be available.

http://tradetools.co.nz/products/2020250 is the spare part. It's actually for a drill sharpener, and 200 grit.

http://www.gsc-tw.com/products_03.php?id=7 Is the machine that uses that disk.

The Makita grinder had a slightly bent other end shaft, so it's now not there. It's sharpened thousands of Tungstens, still going well.
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Re: Grinding tungsten tip from a newbie

Postby LtBadd » Tue Sep 05, 2017 2:49 pm

Graveyard wrote:I broke down and bought an entry level tungsten grinder. It's a Tech South brand, non adjustable. It was about $230 I believe, after grinding tungsten on a wheel for years and having to walk back and forth from the welding table to the grinder this thing is the cats ass. I hang it right on he table and if I touch or gum up the tip I can just reach down and sharpen it. Had it for almost a year and I wouldn't go back. If your a hobbyist it's probably not really worth it but if you're welding every day or even several times a week I recommend spending the money. I was apprehensive for a long time but now that I have one I don't regret it for a second. I like all the ideas you guys have, budget sharpening at its best!!

Thanks for the review, have you had to replace the wheel yet?
Richard

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Re: Grinding tungsten tip from a newbie

Postby Futterama » Tue Sep 05, 2017 4:32 pm

Since this thread is still going, I have another question.

I received some CK Worldwide 0.5mm/0.020" 1.5% lanthanated tungstens today. They are all matte and almost black, not silver and shiny as the CK 1.0mm/0.040" 2% lanthanated tungstens I already had. The CK 0.5mm/0.020" thoriated tungstens I got by mistake, are somewhere in between, not silver, not all black but mostly matte grey.

Is this OK for brand new tungstens? I mean, will they act contaminated?

I'm thinking the supplier may have had those is stock for a long time, maybe those small tungstens are just not sold very often, and due to long storage, the tungstens have oxidixed?

The picture shows the 3 mentioned tungstens, to the left/top the black 1.5% lanthanated, middle is the thoriated and the bigger on the right/bottom is the 2% lanthanated.
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Re: Grinding tungsten tip from a newbie

Postby LtBadd » Tue Sep 05, 2017 6:00 pm

Futterama wrote:Since this thread is still going, I have another question.

I received some CK Worldwide 0.5mm/0.020" 1.5% lanthanated tungstens today. They are all matte and almost black, not silver and shiny as the CK 1.0mm/0.040" 2% lanthanated tungstens I already had. The CK 0.5mm/0.020" thoriated tungstens I got by mistake, are somewhere in between, not silver, not all black but mostly matte grey.

Is this OK for brand new tungstens? I mean, will they act contaminated?

I'm thinking the supplier may have had those is stock for a long time, maybe those small tungstens are just not sold very often, and due to long storage, the tungstens have oxidixed?

The picture shows the 3 mentioned tungstens, to the left/top the black 1.5% lanthanated, middle is the thoriated and the bigger on the right/bottom is the 2% lanthanated.

I've used a lot of .040" but never seen this, or have I heard of tungsten oxidizing (not that this means it doesn't)

Why are you choosing 1.5% Lan over 2% thoriated? If you're going use use lan tungsten all reviews I've seen recommend the 2% lan over the 1.5% lan. I do use 2% lan myself, but in the past always 2% thoriated for DC welding
Richard

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Re: Grinding tungsten tip from a newbie

Postby Futterama » Wed Sep 06, 2017 3:16 am

LtBadd wrote:I've used a lot of .040" but never seen this, or have I heard of tungsten oxidizing (not that this means it doesn't)

My .040" are looking fine and shiny, it's the .020" that is looking very different.

LtBadd wrote:Why are you choosing 1.5% Lan over 2% thoriated? If you're going use use lan tungsten all reviews I've seen recommend the 2% lan over the 1.5% lan. I do use 2% lan myself, but in the past always 2% thoriated for DC welding

I would rather just use 2% lan all around, as Jody recommends. But my supplier did not have 2% lan available in 0.5mm/0.020". If they should get it for me, I would have to buy 100pcs and wait for 3 weeks. At other sources, I would have to pay an absurd amount for shipping. So I went with 1.5% lan as my supplier had that in stock, thinking I would try it out as I'm still so new to this that I can't say 2% lan would be any better for my application.
The 2% thoriated was shipped to me instead of the ordered 1.5% lan as a mistake, they corrected the mistake but the received 1.5% lan are black, which puzzles me.
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Re: Grinding tungsten tip from a newbie

Postby Graveyard » Wed Sep 06, 2017 11:53 am

LtBadd wrote:
Graveyard wrote:I broke down and bought an entry level tungsten grinder. It's a Tech South brand, non adjustable. It was about $230 I believe, after grinding tungsten on a wheel for years and having to walk back and forth from the welding table to the grinder this thing is the cats ass. I hang it right on he table and if I touch or gum up the tip I can just reach down and sharpen it. Had it for almost a year and I wouldn't go back. If your a hobbyist it's probably not really worth it but if you're welding every day or even several times a week I recommend spending the money. I was apprehensive for a long time but now that I have one I don't regret it for a second. I like all the ideas you guys have, budget sharpening at its best!!

Thanks for the review, have you had to replace the wheel yet?



No sir, still using the same wheel and I'm told that when one side wears out you can flip it. Not sure if there is any truth to that but I'm going to try when the time comesz
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Re: Grinding tungsten tip from a newbie

Postby LtBadd » Wed Sep 06, 2017 6:40 pm

Graveyard wrote:
LtBadd wrote:Thanks for the review, have you had to replace the wheel yet?


No sir, still using the same wheel and I'm told that when one side wears out you can flip it. Not sure if there is any truth to that but I'm going to try when the time comesz

What diameter tungsten do you typically use? I use mostly 3/32 and 1/16"
Richard

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