Thread: Help with connecting disp. gas bottle to MIG please!!!

We bought the same bottle and reg from bunnings (trade flame) at work, first one did not work so we returned it, second one had the same problem.
We ended up going to konect (covenrtry fastners) and getting their system instead. The bunnings ones are rubbish.

...or bypass the disposable bottles entirely and buy a proper cylinder. If you are doing more than one or two jobs, your wallet will love you for it!

It sounds very much like the regulator is faulty and a refund is due at bunnings.To be very candid, I think it's a very expensive way of welding.

If it is the size and price disposable cylinder I think it is, there may be 10 minutes or about of gas time in the cylinder.This would be running with the bare minimum gas delivery setting.

Also material thicknesses below 1-2mm may be subject to blow through as Co2 makes for deep penetration in the material.

Just some facts you should be aware of.

Grahame

Just to add to that, I found that if I screwed the reg on too far it leaked. If it tightened it enough to seal, it worked. Honestly though, as others have suggested, look at a proper bottle, you will not regret it.

Pretty much worked it out like this. Watched a youtube video where a bloke from the UK mentions what the airflow should be with disposable's. 3-4L / minute. Also has this handy flow meter that he plunks on the tip of the gun and adjusts the flow to suit (since the typical reg. for disposables have to read-out). I went out and got one from Burnback in Bibra Lake. Turns out that I really only need to twist the valve a couple turns to achieve this 3L/minute. I suppose the confusion comes from how one would usually fully open their gas tank and then tweak the flow. Whereas, with the disposable, fully open just makes the cheap-ass Bunny's regulator blow it's top. So, without this flow meter I would have been stuffed. I still plan on upgrading to a better reg. And yeah, I would get a proper full sized bottle, but I'm really just tacking a few things together. THanks for the feedback though. It's definitely appreciated lads.

i bought a second hand near new DC TIG from a guy on a online auction site it came with a free full bottle of Argon i used the bottle removing broken bolts i seriously got around 1 hour out of the bottle i couldnt believe it that was actually going for around 10-12mins than stopping and shutting off the valve untill i was ready to go again

this was a REPCO bottle im not sure if its any bigger than the ones other stores like bunnings sell?

i was also using it inside my small 3x3m garden shed, to achieve the gas flow i would hold the torch up to my ear and listen to the flow i got it as low as possible than gave it an ever so slightly turn open and that was the perfect flow

now welding outdoors with my D cylinder that all goes out the window haha

disregard my msg just seen your using MIG

Originally Posted by Master Splinter

...or bypass the disposable bottles entirely and buy a proper cylinder. If you are doing more than one or two jobs, your wallet will love you for it!

I just got my 6.5Kg Co2 cylinder retested and refilled at the local fire extinguisher place - $130 (refill only normally around $70-80). So in the 5 years I've owned it it has cost me around $350 ... that's a couple of years rental. PS - I actually think that the retest period should be 10 years, not 5, but I couldn't be bothered arguing with the bloke.

Originally Posted by Grahame Collins

Also material thicknesses below 1-2mm may be subject to blow through as Co2 makes for deep penetration in the material.

I'm currently doing a lot of 1.6mm gal SHS and don't have any issues with blow through (especially if the fit-up is tight). With care, I've even gone down to 0.9mm sheet for body work - 0.9mm + Co2 is certainly not something you would want to do in a production setting, but for a hobby bloke it's fine. However I'd weld all day with 1.6mm + Co2.