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Topic Review (Newest First)
07-06-2009 11:22 AM
NEW INTERIORS I have the miller spectrum 375,Man that is one he** of a machine..Money well spent.
07-06-2009 11:11 AM
cranky1 I have a TD Cutmaster 51 that I bought from an Ebay store and saved well over 200 bucks vs buying it local. I'm happy with it and after several years, it's working very well and consumables are lasting. And first day on the job...I usually kept my shut for a long time until I found out what kind of a group I hired into lol
07-06-2009 09:54 AM
Originally Posted by 61bone
However, using shop air in your mig is not recommended. It will cause degredation of the welds.

LOL, That's not the half of it! I saw this done once when some guys played a joke on a new employee who started telling everyone what they were doing wrong on his first day on the job. "Degraddation" of the weld? You betcha!
07-05-2009 11:37 PM
61bone Never heard of a plasma cutter that uses O2. You would have to have tanks the size of railroad cars. My Lincoln Procut 55 uses air at the rate of 12 cfm at 60 psi.
As to your other question. The change in metalurgy while cutting with air/plasma is so minute it is not even in the equation. However, using shop air in your mig is not recommended. It will cause degredation of the welds.
07-05-2009 09:40 PM
31fordcoupe Gents,

I am also in the process of looking for a plasma cutter. I am looking at this one and wanted to know your thoughts on Hobart products. The reviews I have found have been positive.

Also, I know you can you use shop air (compressed air from a compressor) to cut with but after reading the attached article I was wondering if the steel that I get from a local steel supply house is carbon steel or some other steel (I know very little about the different types of steel) and does using shop air with any type of steel make any later weld not as strong? Is it better to use oxygen instead of shop air?

Any feedback you guys can give me on the Hobart 400 and whether or not shop air weakens welds after you have cut an edge on shop air would be greatly appreciated.

Thanks in advance.

01-21-2009 11:08 PM
Ed ke6bnl I have an old thermal dynamics and it design for 1/4 in and ways in at about 125 or more lbs. but works great and have cut easily 1/6 diamond plate steel sure was sweat when it cam time to cut long way some thick corrugated sheet metal for a shed. the PARTS WERE VERY REASONABLE TO BUY. that is a crucial issue. Ed
01-13-2009 09:17 AM
RPM here is the whole part. It takes less than 1 minute to cut.
01-13-2009 09:15 AM
RPM here is a pic of the edge of a 3/8" bracket we cut. It has only had a quick pass on a wire wheel.
01-13-2009 09:03 AM
lets cut it up I have a miller spectrum 375. and I have only had to change tips once in 4 years. I cut up may 55 in my pix with the machine. Very nice cuts with little to no warping, although they can be sharp and cut like a razor after.LOL It will do everthing I will ever need to do as far as plasmas go. I am very happy with it. (desclaimer:I AM NOT afillated with miller in any way shape or form).

I think I couldnt go back to a torch set up, Tim
01-12-2009 05:23 PM
Originally Posted by joe123
I have a Miller Spectrum 375 and couldn't be happier. Does a great job and is small enough that I can move it around the garage with me. Worth every dollar. But, like others have said it doesn�t do anything an angle grinder/torch won�t do (although the neighbours prefer the plasma over the noise of a grinder).
Joe..I sure hope that's a good one,I just bought one Friday,Waiting for it to come in.
01-12-2009 04:25 PM
joe123 I have a Miller Spectrum 375 and couldn't be happier. Does a great job and is small enough that I can move it around the garage with me. Worth every dollar. But, like others have said it doesn’t do anything an angle grinder/torch won’t do (although the neighbours prefer the plasma over the noise of a grinder).
12-09-2008 03:06 PM
SteveU How would a Thermal Dynamics Cutmaster 70 be? Says it runs from 25-80 amps & has a duty cycle of 40% @ 80 amps.
12-08-2008 04:59 PM
re: plasma cutter

Hook the Miller up to your own AC. It can't be that hard..........When i first bought mine (esob) I was using a small pancake compressor, now i have a big 16 CFM unit and what a difference ....But bypassing the built in AC should be ez.
12-08-2008 02:58 PM
47dodge I did a bit of trading and ended up with a Miller Spectrum Thunder with the built in air compressor. After using it a bit I would say don't get anything with a built in compressor. While it is kind of handy not to have to hook air up to it I'm always waiting on it. If you even tap the trigger on it you have to wait for the compressor to go through the recharge cycle before you can use it again. It is a lot of waiting for the cutting you do. I can't really recommend it to anybody.

I also have an old Solar 15 amp 120 volt plasma cutter. It works OK but it is pretty light duty. I like using it but the most I have ever cut with that is probably 1/8"

While I can't really complain because I only have about $300 into the two plasma cutters as soon as I can come up with a bit of money I plan on selling both of mine and buying a really nice one. Don't skimp like I did or you will never be happy. Also if you buy one of the top brands you will be able to find tips much easier. I can get tips in town for the Miller but not the Solar.
12-07-2008 08:53 AM
trees I purchased an Esaab at the Spring Charlotte Car Show/Flea Market several years ago. After a short learning period that probably did most of the wear and tear on the supplied "expendables", it basically retired the chop saw, band saw, and die/angle grinders with their high dollar wheels, and the small torch. We use shop air that has a very good drying/filtering setup so have not had any water problems. Would not think about doing without this tool. I do use a guide for all straight cuts and try to have a pattern for more complex cuts. Though hard on tips, it is a life saver when ever we break an easy out or high carbon drill bit in a hole!!!

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