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  1. #1
    Join Date
    Oct 2008
    Location
    Oregon
    Posts
    193

    Default Miller 375 Spectrum, or 375 Spectrum Extreme

    Is the difference just the carrying case?

    What does it really need for air compressor capacity?
    How many CFM?
    Millermatic 211 AutoSet w/MVP
    Century 110 volt 90/110 MIG-Gone to my son, in Texas
    Victor SuperRange OA
    Milwaukee Cold Cut Saw
    Milwaukee Portable Deep Cut Bandsaw
    Milwaukee Hole Hawg
    Jet Horizontal/Vertical Bandsaw
    Jet MD-18 Mill Drill
    Orbit Drill Press
    12 Ton Floor Press
    2002 E-350 V-10:
    1983 F-150 4.9L 6
    2004 Honda ST1300
    2007 Suzuki LTA400F Quad
    1997 Suzuki DR650

  2. #2
    Join Date
    Oct 2007
    Posts
    2,949

    Default 375 Differences

    Basically, the 375 is a "bench model" and weighs 55#. It does have "dual voltage" capabilities, but it is a rather arduous task to physically change the plug(s).

    The Extreme weighs in @ 18#, comes with Miller's patented MVP plugs, and a nice, optional carry case.

    Figuring CFM's, your compressure should deliver 1 1/2 times the needed amount to run effectively. 4.5 CFM input requires at least 6.75 CFM @ 90 psi.

    Both units have the same cut rating, and consumable parts for the 27 series torch parts are compatible.

    The 375 comes with a 20' torch, the Extreme a 12'.

    Hope this helps

    Dave
    "Bonne journe'e mes amis"

  3. #3
    Join Date
    Oct 2008
    Location
    Oregon
    Posts
    193

    Default

    I have noticed that Miller's video shows a guy carrying the unit up a ladder but they never mention the air supply.
    One shop told me that they measure in BAR, I measure by CFM at pressure, just what I would do for using any air tool.
    Another shop said any portable mini compressor will do it but I don't think that's right.
    Millermatic 211 AutoSet w/MVP
    Century 110 volt 90/110 MIG-Gone to my son, in Texas
    Victor SuperRange OA
    Milwaukee Cold Cut Saw
    Milwaukee Portable Deep Cut Bandsaw
    Milwaukee Hole Hawg
    Jet Horizontal/Vertical Bandsaw
    Jet MD-18 Mill Drill
    Orbit Drill Press
    12 Ton Floor Press
    2002 E-350 V-10:
    1983 F-150 4.9L 6
    2004 Honda ST1300
    2007 Suzuki LTA400F Quad
    1997 Suzuki DR650

  4. #4
    Join Date
    Oct 2007
    Posts
    2,949

    Default "Air Supply"

    A lot of job sites use compressed air or N2 bottles.

    Dave
    "Bonne journe'e mes amis"

  5. #5

    Default

    I do not push my 375 Extreme to its limits most of the time but if it is any help I get by fine with either of my two compressors. I use the DeWalt on those occasions when I am not working in the garge. I'm sure I have actually cut more linear feet of 16 gauge sheet metal using the DeWalt. I've cut a fair amount of 1/4" using either compressor.

    The DeWalt with a 4.5 gallon tank specs 5.2 SCFM @ 90 psi while the Husky with a 26 gallon tank specs 5.5 SCFM @ 90 psi. Either compressor will support my 375 Extreme even when the compressor is running. I've included a pic of each for clarity.

    DEWD55146_l.jpg

    Husky2hp_26gal.jpg
    Larry

    "I feel for the man who can only spell a word one way"......Mark Twain

    Lincoln AC225-S (OLD/Copper Wound)
    Lincoln Weldpac 100
    Miller Matic 180 (auto set)
    Miller Spool gun 100
    Miller Spectrum 375 Extreme
    Victor Super Range II

  6. #6
    Join Date
    Oct 2008
    Location
    Oregon
    Posts
    193

    Default

    I have something that looks like each of those.
    I'll have to check the specs on them but I know my bigger one on wheels has one of those tiny little motors that says it's bigger than it really is.
    The small one I use for air nailers etc., it's also an Emglo.
    Millermatic 211 AutoSet w/MVP
    Century 110 volt 90/110 MIG-Gone to my son, in Texas
    Victor SuperRange OA
    Milwaukee Cold Cut Saw
    Milwaukee Portable Deep Cut Bandsaw
    Milwaukee Hole Hawg
    Jet Horizontal/Vertical Bandsaw
    Jet MD-18 Mill Drill
    Orbit Drill Press
    12 Ton Floor Press
    2002 E-350 V-10:
    1983 F-150 4.9L 6
    2004 Honda ST1300
    2007 Suzuki LTA400F Quad
    1997 Suzuki DR650

  7. #7
    Join Date
    Oct 2007
    Posts
    2,949

    Default Plasma Air Filter

    Make sure you run an air filter, like a Motor Guard #26, or compatible.

    You can buy a thread in type made by Miller or Therma Dynamics.

    It is very important to keep moisture out of the plasma unit.

    Dave
    "Bonne journe'e mes amis"

  8. #8
    Join Date
    Dec 2008
    Location
    Arizona
    Posts
    812

    Default

    Quote Originally Posted by davedarragh View Post
    Basically, the 375 is a "bench model" and weighs 55#. It does have "dual voltage" capabilities, but it is a rather arduous task to physically change the plug(s).
    I have the 375 and just have a jumper plug for when I use 220 volts. So it's no biggie to deal with the plugs. I (sometimes regretfully) traded down from a 675 that my wife bought as a gift so I could have the dual voltage rather than a dedicated 220, but it's a nice feature.
    Miller Syncrowave 200
    Homemade Water Cooler
    130XP MIG
    Spectrum 375
    60 year old Logan Lathe
    Select Machine and Tool Mill
    More stuff than I can keep track of..

  9. #9
    Join Date
    Nov 2007
    Location
    Central Idaho
    Posts
    203

    Default

    The X-treme performs MUCH better on 110 that the 375. Althought the 375 does have a 110 connection, it would always trip a 20 amp breaker. I've had both and the X-treme is certainly my choice.

  10. #10
    Join Date
    Oct 2008
    Location
    Oregon
    Posts
    193

    Default

    I checked the specs on my Campbell Hausfeld 5 HP (haha), it's 5.5 CFM @ 90 lbs.
    I don't believe the 5 HP and wonder about the 5.5 CFM,
    Last edited by ligito; 04-18-2009 at 11:14 PM.
    Millermatic 211 AutoSet w/MVP
    Century 110 volt 90/110 MIG-Gone to my son, in Texas
    Victor SuperRange OA
    Milwaukee Cold Cut Saw
    Milwaukee Portable Deep Cut Bandsaw
    Milwaukee Hole Hawg
    Jet Horizontal/Vertical Bandsaw
    Jet MD-18 Mill Drill
    Orbit Drill Press
    12 Ton Floor Press
    2002 E-350 V-10:
    1983 F-150 4.9L 6
    2004 Honda ST1300
    2007 Suzuki LTA400F Quad
    1997 Suzuki DR650

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