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Machine ID? Mac Tools MW 275N

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3.5K views 14 replies 6 participants last post by  jkauto  
#1 ·
Bought a mystery welder. Mac Tools stickers on both sides. Front panel says MW 275N. No info on the web that I can find, but the search does bring up the Mac Tools website. I emailed them and waiting for replies.


Can someone please identify it?


I read in other Mac posts that it could be a Miller, but I can't find any matching Miller machine out there.


Photo album - welder and the first repairs (AC cord):


https://photos.app.goo.gl/dL7QTjFDvzrb1yhZ6


***


First machine, bought on a whim to learn how they are made and how to weld.


The honest seller said "sure it works, but I don't have 240V here to show you" ...so I knew this was an inop, but for the price ($250) I decided to get it for learning and possible repair.


Didn't take long to discover why the machine was parked. The AC cord pulled out (looked like some damaged outer insulation at first) and the ground lead was pulled off the chassis. This was the main ground lead.


I don't know whether this welder will power up without a proper ground. The ground spade connection point had surface rust on it. Maybe the machine kept going or maybe just sitting and rusting. There are two buss fuse holders. One has a good fuse. The other had tinfoil around it. No obviously meled insulation inside, but who knows...


I fixed the AC cord but have not plugged it in yet. Better stop here. Looking forward to your comments.


--
Mike
 

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#6 ·
I've looked those 250 and 270 manuals over, thanks whtbaron!, but the diagrams don't match up. For one thing, this machine has the intriguing "Spot Time" knob and the others don't. Can it do spot welding?


I think what jpump5 said may be the right direction. When I searched for the EN60974-1 number off the front panel, I saw a bunch of references to some EU standards (and various manufactures like Lincoln, etc. stating compliance). One component - the large heat sink? looking thing - does have a 2007 date sticker.
 
#7 · (Edited)
I have no clue... yours is the first one I've seen. I did find this in another thread though... "Mac tools welders and plasma cutter are often made by CEMONT an Italian company which is now part of the Air liquide Group.
They make Oerlikon and SAF-FRO. It's very good kit if that's the case. I have a mac plasma cutter."

"Who Makes MAC Welders? Find out Here
MAC has been a famous welder in Europe, but only one manufacturing company is affiliated with it and produces the welders. However, the company is CEMONT, located in Italy; it’s a part of the Air Liquid Group.

They provide many other things as SAF-FRO, Oerlikon; the welder and plasma cutter package has a positive review among everyone. Once there was a rumour like the Hobart’s is producing MAC tools.

As a result, a question arose, MAC tools= Hobart’s? Now, the answer may be clear to you that Hobart’s was never involved with MAC tools. The brand, along with Century and Dayton, used to manufacture the MATCO welders."
 
#9 ·
Looks like I found my answer (almost). A closer look at the current Mac Tools MW260D shows that my machine is the earlier version, with the main difference being the addition of an electronic panel on the 260D in place of analog controls for the same functions on the MW275N.


https://www.mactools.com/products/mw260d


So that's the machine I am hoping to learn my welding on. Wish me luck, I know this is a far bigger machine than any beginner needs.


I have to update my 240V garage wiring, get a helmet and some gear and get going...


Mike




PS of all the companies I emailed about my welder, only Miller replied on day one. Have yet to hear back from all the rest, including the mother ship.
 

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#10 ·
They must have dropped the welder line in Canada.... every time I try to pull up one of their pages on welders it goes to "page not found".
 
#12 ·
Placed a call to MAC Tools tech support and got the answer: this MW275N machine was made between 2006 and 2009, in the US, by a company in NC - Nu Tec Systems. Later in the day, both MAC and Nu Tec responded with an Operators Manual, wich included a wiring diagram and some parts rosters.


Nu Tec is also the confirmed manufacturer of the current MAC/Matco MW260d


If anyone needs a copy of the MW275N manual, I send you a PDF.

--
Mike
 
#14 ·
Almost the same machine, less features, but all the amps. :

MAG260 MAG-Power® Aluminum - Steel MIG Welding System
Dual-Drive MIG Gun & SpoolGun with Switch-on-the-Fly


https://weldingdirect.com/nutom250migw.html

I also saw this , similar features to hobart and lincoln offerings. Almost looks like an EWM. Comes with a foot pedal , Mig and Tig torches, and a regulator.

MAG-200S MAG-Power® Multi-Process Welding System
Synergic MIG or TIG Welding on 115VAC or 230VAC Power
16 Preloaded Synergic MIG Welding Programs
MIG / TIG / Stick and Aluminum Spool Gun (Optional)


https://weldingdirect.com/muwe200ampma.html


Interesting.... the internet lied again...
I think its more complicated than that. I have a snap on that is made by systematics inc. in West Chester, PA. Snap On bought machines from Century, Solar, and Systematics. Systematics looks like they have a few import unit, synergic pulse two gun auto body machines that look similar to a HTP. Many companies don't manufacture all their machines in house, some are imported, and some are assembled from imported parts and sub assemblies. That info panel on the front of that 275 is like a CE standard, I've only seen lincoln export machines with those kind of symbols. I guess the most important thing is who is going to support it. If you find enough support you should be able to get that 275 going again. If its like the SnapOn I have, 12-14 tap CV transformer unit with just a speed control board it should serve you well from 16ga. to 1/2" steel, and aluminum too with the proper kit.

Good Luck