carbon arc

[weldone]

when you use this method do you need like a brazing rod held in to the heat or is there somthing in the carbon rod

 

[shenion]

Yes, the arc is just a heat source.

 

[JayRS4]

the carbon rod is there just to supply the heat, you`ll need a brazing rod as well, yes. I don`t know about flux, i should imagine so

 

[weldone]

thanks could this be used like a spot welder

 

[madkayaker]

it won't clamp that materials together like a spot welder but could be used as a plug welder. What you planing?

 

[weldone]

nothing really just got the tool and that hols the rods and wondered what things it can do.

 

[Dusty]

Carbon arc brazing, whooh takes me back, blinded almost everyone in the street!
needs special flux coated rods fed in, and extream care, easy to over heat what youre working on. If your considering using one take care to cover your skin completly, or it will burn you! that said, had one, used it to braze on door skins etc, heat up frozen bolts/nuts etc. Not much call for brazing work on car's these days (if at all?)
O/A kit easier to use but cost's a lot more......
Dusty

 

[Shox Dr]

A lot of steel used in vehicles these days have a high Boron content, causing the material to warp from welding so brazing is making a come back

http://www.mig-welding.co.uk/brazing.htm

 

[weldequip]

so brazing is making a come back

MIG Brazing, not conventional type brazing
The idea is to get less heat into these modern materials so it doesn't damage the strength/corrosion properties. Conventional brazing would increase the heat input.
weldequip

 

[Shox Dr]

very true hense the link to MIG brazing (should have made it clearer)

 

[TechnicAl]

Its not the Boron that makes it distort. The Boron increases the strength of the steel so they can use thinner steel, reduce weight and yet maintain the strength. Reduced weight equals faster and / or better consumption.
If the Boron steels are overheated they lose the strength, so combine that with thinner section and you need to reduce heat input when joining. MIG brazing reduces heat input and even though its a weak point the designers take care of that.

 

[TechnicAl]

Oh and Carbon Arc has to be the worst welding process ever invented. Basically its electric gas welding (does that make sense) but it produces awful joints and awful welders (burnt to a crisp).
My advice ........... forget it

 

[paulmowers]

Hi

I had one of those many many years ago, as already stated make sure everything is covered (you i mean) it burns real quick and do not ever get arc eye from it, at best you wont be able to see for several minutes.
I used to use mine for the odd bit of real thin stuff, the likes of what I now use a mig for, but when funds were extremely tight it was a godsend coupled to a 140a ac arc set, used it at opprox 50amps with the carbon torch.
Used flux coated brazing rods with it, but found them to be expensive and also rather too much flux causing the weld? braze to spread too much so changed to serrated rods and dipped in sifbronze flux powder, that worked much better.
Managed to braze up a couple of cast iron inlet manifolds from lister D series stationary engines with it, and free off numerous seized shafts and things on antique machinery with it.
As already mentioned its not ideal and there are other easier methods but if funds are tight it can be made to work.

Paul..

 

[aero]

It produces too much carbon that gets on the work, making it all but usless in my book

I had one, It was great for lighting up the street and making the neighbours wonder what the hell I'd got hold of this time!

 

[madkayaker]

I have used one once in a raulplug 12V welder to light a fag for my mate. Have wondered bout one in a bigger welder for a try

 

[jaycee21]

hi
looking for carbon arc electrodes
based in south africa - durban
please help

 

[PTvor]

Rapid sell the carbons and the torches.

http://www.rapidwelding.com/dynamic/Category.aspx?c=ARCACCESSORIES&o=0&zz=0&zl=0&sq=0

I doubt there are many other suppliers who carry them these days. It just isn't a popular welding process now.

I don't know what it would cost to send them to S.A.

What about welding suppliers in S.A.?

 

[schnappi]

Brazed a tandem frame together using carbon arc and fluxed brazing rods about 25 years ago. The tandem is still in use to this day so carbon arc can't be that terrible. I seem to recall I made up my own flux using borax and meths (if I remember correctly) to protect the surrounding area from oxidisation.

I seem to remember that it was a pretty fierce process and was difficult to control but I'm obviously happy with the result of having a tandem to ride all these years.