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comment by kleinbl00
kleinbl00  ·  1719 days ago  ·  link  ·    ·  parent  ·  post: Pubski: July 3, 2019

It's not the rod, you need a bigger tip.

Oxyacetylene is great because you can pretty much weld with whatever you have around. Baling wire, coat hangers, hardware cloth... we never bothered buying stock for oxy 'cuz you can use literally anything. Same with TiG if you're doing steel.

But if you're not getting it hot enough your welds will look like...that.





ilex  ·  1715 days ago  ·  link  ·  

It's pretty thin material--the bigger tip was just melting it back. Maybe I just need to get faster at welding!

kleinbl00  ·  1715 days ago  ·  link  ·  

I mean yeah the thin stuff rips but exhaust tubing ain't that skinny. Boilerplate it ain't but exhaust tubing is bread'n'butter oxy stuff because if you arc weld it you gotta go like two inches a second and that's no fun.

You need to keep the puddle from blowing through. Tap the rod into the puddle and it doesn't much matter about anything else; the trick to oxyacetylene welding is that there's enough solid under the liquid to keep it from going poof with the gas pressure. After that it's like soldering; you just feed the puddle. That gets tricky with like gas tanks but you can do it with bodywork no prob (minus the puckering of course).

If you have more exhaust shit to do it's not cheating to buy a 45 degree bend and lap-weld it.