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Plasma Cutter + Air Compressor

Discussion in 'General Automotive' started by Grossomotto, Oct 21, 2019.

  1. Oct 21, 2019 at 6:31 AM
    #1
    Grossomotto

    Grossomotto [OP] Complete 3rd Member

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    A question for the metal fabricators out there. I'm buying a Hobart plasma cutter and it requires 3 CFM at 90-120 PSI. My air compressor delivers 6.5cfm at 90psi, will this be enough? Is the 90-120 psi requirement a range or 90 psi is the minimum? Thanks for any info.
     
  2. Oct 21, 2019 at 6:41 AM
    #2
    rnish

    rnish Well-Known Member

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    You can make an exterior air tank that you can precharge before use. You don't have to rely on the compressor alone while cutting.
     
  3. Oct 21, 2019 at 6:42 AM
    #3
    GHOST SHIP

    GHOST SHIP hates you.

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    The issue for plasma is usually more with CFM than PSI for them to run smoothly. If your compressor is able to keep up with the advertised 6 cfm rating, you should be good. Plasma cutters flow a lot of volume at 90 psi. You’ll want to make sure the tank is big enough to sustain that for as long as you intend to work with the plasma.
     
  4. Oct 21, 2019 at 6:50 AM
    #4
    Grossomotto

    Grossomotto [OP] Complete 3rd Member

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    Thanks and to rnish above. It’s a 5 gallon tank so wondering if I need a 10+ gallon external tank? It’s rated at 6.5 CFM at 90 psi, so should be good. Here’s the cutter.

    https://www.hobartwelders.com/equipment/plasma-cutters/airforce-27i-m30071


     
  5. Oct 22, 2019 at 12:42 PM
    #5
    Grossomotto

    Grossomotto [OP] Complete 3rd Member

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    Gunshot-6A likes this.
  6. Oct 22, 2019 at 12:45 PM
    #6
    Gunshot-6A

    Gunshot-6A Not a Fed

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    Grossomotto [OP] likes this.
  7. Oct 14, 2020 at 4:43 PM
    #7
    Grossomotto

    Grossomotto [OP] Complete 3rd Member

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    I'm slow like a turtle, never got around to buying the Hobart. The Miller plasma cutters and welders come highly recommended which I'm now looking at. Let me know if anyone has any comments good or bad about these two.

    https://www.ebay.com/itm/MILLER-SPECTRUM-375-X-TREME-PLASMA-CUTTER-907529/131397513285

    https://www.ebay.com/itm/Miller-Mil...er-with-Advanced-Auto-Set-907614/132030715020
     
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