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  1. #1
    Join Date
    Jan 2014
    Posts
    1

    Default MM250 and MM250X advice

    Hello, new here, just trying to get some advice on a welder purchase. A guy I know is selling a MM250 and a MM250X. I really don't know the difference between them and cant really find any solid info on whether they are good machines or what kind of value they have. currently I have a small Lincoln 110v mig that I have outgrown with my fabrication projects and am in the market for a reasonably priced machine that I will not outgrow. My projects consist of mostly roll cage and off road bumper fabrication, with 1/8"-1/4" mild steel. I would like to be able to run a spool gun for aluminum sometime down the road. Another welding forum is suggesting they are early 2000's machines but im not sure if that is accurate. Any help is appreciated, thanks.

  2. #2
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,847

    Default

    I have an MM250 that I bought new in 95 or 96. Kind of known as the black sheep of the miller 250 amp migs. Overall it is a good sturdy machine. They seem to run forever. You can run a spool gun from it if the machine has the module installed or it can be added but not sure of the cost.

    I say black sheep because of the arc characteristics. Compared to the older MM200 & the newer MM251 or 252 the arc is very "stiff". Hard to explain unless you've run it. If the price is right I would buy it.

    Pricing depends on the part of the country you're in. I've seen nice ones go for $1000-$1500 on average.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

  3. #3
    Join Date
    Nov 2012
    Location
    Northern Arizona
    Posts
    479

    Default

    I have a 251. From what I understand it is very similar to the 250x. That machine should have digital readouts for volts/wfs. The 250 should have the same dials but just a label on the dials that is your v/wfs

    I was told the 251 has a softer arc. I really like my 251 and would get another one if I needed it. The m25 gun is lacking but otherwise a great machine.
    MillerMatic 251
    CST 280 w/tig torch
    HF-251-D1
    Cutmaster 42
    Victor Journeyman OA

    A rockcrawler, er money pit, in progress...

  4. #4
    Join Date
    Nov 2012
    Location
    Northern Arizona
    Posts
    479

    Default

    Also if you get a serial number from the machines you date them and figure out what year and which part of the year they were made. Might be helpful.
    MillerMatic 251
    CST 280 w/tig torch
    HF-251-D1
    Cutmaster 42
    Victor Journeyman OA

    A rockcrawler, er money pit, in progress...

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,742

    Default

    Really the only difference between the 251 and the 250x is that the 250X has a 2 scr rectifier nd the 251 has 1 scr rectifier. Both fine machines. th 250 is a POS compared to the 250X

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