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  1. #1
    Join Date
    Jul 2011
    Posts
    9

    Default Another Airco Bumblebee [MA] machine

    I just purchased an Airco Bumblebee 250a AC/DC [MA] machine. Looks great, never abused. It was owned by Florida State University mail room department for shop repairs. The guy said it was rarely used and it looks like it!! I also got 50' leads with it and they are in excellent condition.

    What I need to know is exactly which Miller model this crosses too. Another thread posted about this type welder showed that one to cross to a Miller DialArc 250.

    I am sure mine is a Miller DialArc 250 but not completely sure which one. My machine is not a Bumblebee II [MSM], which is the case in most of the posts I found here.

    Mine is a Bumblebee [MA].

    Serial# HG050397
    Stock # 1341-0266




  2. #2
    Join Date
    Nov 2003
    Posts
    3,029

    Default

    from your serial number and pic.... looks like a 1976 model... here is a link to the manual that corresponds.. hope this helps...

    http://www.millerwelds.com/om/o314c_mil.pdf

  3. #3
    Join Date
    Jul 2011
    Posts
    9

    Default

    Thank You!!

    Can you also tell me what the [MA] versus [MSM] designation means?

  4. #4
    Join Date
    Nov 2003
    Posts
    3,029

    Default

    fraid that I do not know the answer to that.... perhaps "Cruizer" will see this thread and help us out..... he is a very knowledgable welder repair tech...

  5. #5
    Join Date
    Nov 2003
    Posts
    3,029

    Default Just a guess

    just guessing..... but since your machine is a Magnetic Amp machine.... maybe it is Magnetic Amp (MA) vs Moveable Shunt Machine (MSM) for amp control where a section of the transformer core is slid in and out to regulate current...

  6. #6
    Join Date
    Jul 2011
    Posts
    9

    Default

    Quote Originally Posted by H80N View Post
    just guessing..... but since your machine is a Magnetic Amp machine.... maybe it is Magnetic Amp (MA) vs Moveable Shunt Machine (MSM) for amp control where a section of the transformer core is slid in and out to regulate current...
    That's it! Thanks!

  7. #7
    Join Date
    Jun 2011
    Posts
    6

    Default

    That machine sure looks new, nice find!

  8. #8
    Join Date
    Jul 2011
    Posts
    9

    Default

    It still had the paper tag, I guess a consumer warning label, attached to the side panel.

  9. #9
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,590

    Default

    MA, is the old way of saying *** Metal Arc*** welding

  10. #10
    Join Date
    Nov 2003
    Posts
    3,029

    Default

    Cruizer
    thanks for helping out.... guesses usually get me in trouble.. even ones that sound so logical.....

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