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  1. #1
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    Default Disposable gas cylinder thread

    Hi,
    Does anyone know what the thread form on the disposable mig gas cylinders is? From what I can see it looks like a M10 x 1 but I'm not sure. I've searched the internet top to bottom but can't find any references to the thread type.
    What I am thinking of doing is making up an adaptor to go from the disposable cylinder into the normal regulator. I have the disposable regulator but it doesn't have any gauges whereas the normal regulator I have does so thought it would be good to know what my flow rates was when using the disposable cylinders.

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  3. #2
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    Default

    Bob the welder has an adaptor for just under $19 plus postage if you dont want to go to the trouble of making your own.

  4. #3
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    Default

    Hi Pipeclay,
    Yeah. I spotted those. Wish I'd spotted one of those 12 months ago. I looked everywhere and couldn't get anything. Ended up having to spending $40 on a disposable cylinder regulator.

    Not too sure about the plastic hose connecting the two adaptors together though. Those disposable cylinders are under about 60 bar (870 psi) from what I can figure out. Have serious doubts about a hose under those sorts of pressures.

    I've just done search number 1001 and have noticed that in the UK they are saying it's a 1/8" BSP thread. Not sure if the UK standards are the same as Aus though. 1/8" BSP equates to a major dia of 0.3830" (9.728mm). I measured the major dia of the cylinder at very close to 10mm. Normally if you measure an external thread dia you come under the major dia so I'm not sure.

  5. #4
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    Ring one of the suppliers and ask them,dont forget the BSP is tappered not sure where along there length they measure,if you can get a 1/8" cap or reducing bush and check.

  6. #5
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    Default

    Just an update on these threads for anyone trying to do something similar.
    I turned up an adaptor to try things out. The thread on the disposable gas cylinders is 10mm x 1. The thread on the full size regulators is Type 10 which is 5/8 - 14 RH BSP.
    These disposable cylinders are expensive but I can't justify the $167 cylinder rental for the amount of use I give it. Another negative on the cylinder rental is that the smallest I can get is an E type which equates to a lifetime of gas and a big bottle to lug around and store.
    Been looking at the home brew scene where they use a sodastream CO2 cylinder for their kegging so got myself a gas bottle and made up an adaptor from it to the regulator. The sodastream bottles have a CGA 320 thread. At 330 grams of gas in a bottle (disposables are 390g) and $15 refill at Kmart, Woolies, BigW I'm going to use that option. I know CO2 isn't ideal but for the amount of use I give it, it will do and is about half the cost of disposables.

  7. #6
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    Jun 2012
    Location
    melbourne
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    Default

    how do you open the gas on these cylinders when you have it all connected ? ive never used one and im interested in getting one for my mig , also do i need argon co2 to mig weld mild steel or do i just stick with plain argon ?

  8. #7
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    I believe you will need a mix of Argon and CO2 typically 75/25 or something like that. I Haven't tried it but I have heard that pure Argon doesn't provide the heat for steel and will leave the weld sitting higher and harder to control.
    I also have heard that some members on here use pure CO2 with good success at least on medium to heavier steel .
    Anyway just found a link to some interesting results for your information..

    MIG Welding Gas Comparison

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