Miller 375 Spectrum, or 375 Spectrum Extreme

[ligito]

Is the difference just the carrying case?

What does it really need for air compressor capacity?
How many CFM?

[davedarragh]

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

[ligito]

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.

[davedarragh]

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

Dave

[Larwyn]

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

[ligito]

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.

[davedarragh]

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

[nocheepgas]

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.

[mikeswelding]

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.

[ligito]

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,