Millermatic® 212 Auto-Set™ MIG Welder - MillerWelds

Millermatic® 212 Auto-Set™ MIG Welder

All-in-one wire welder that welds material from 22 gauge to 3/8 in. thick in a single pass.


What's Included

  • Millermatic® 212 Auto-Set™
  • 15 ft (4.6 m), 250 amp M-25 MIG gun for .030/.035 in. wire
  • 10 ft (3 m) work cable with clamp
  • 7 ft (2.1 m) power cord and plug
  • Argon mix regulator/flow gauge and hose
  • Factory-installed running gear with EZ-Change™ Low Single Cylinder Rack
  • .030/.035 in reversible drive rolls
  • Extra contact tips
  • Material thickness gauge #229895
A breakthrough control that automatically sets your welder to the proper parameters. Auto-Set makes set up very simple and gives you precise settings instantly.  Learn More
Compatible with Spoolmate 200 Series Spool Gun!
The Spoolmate 200 saves time for the operator by eliminating the need to go back to the machine to change wirefeed speed.
Manual Mode
Gives you the flexibility to manually set the machine when welding aluminum, stainless steel or anytime you want to set your own parameters on mild steel.
Line Voltage Compensation
Keeps welding output constant even if power input varies by +/- 10%.
Standard Built-In Solid-State Contactor Circuit
Makes wire electrically "cold" until trigger is pulled. This makes unit safer and torch easier to position before starting to weld.
Reduce Maintenance and Operating Costs
Our Fan-On-Demand™ cooling system only operates when needed, reducing power consumption and contaminants drawn into the machine.
EZ-Change™ Low Cylinder Rack
Allows users to easily roll cylinders on and off of rack - no need to lift cylinders.
Larger Work Area
Now with longer 15-ft M-25 MIG gun!

Not Included

  • Shielding gas (for welding with solid wire [GMAW])
  • Welding wire
  • Flux cored drive rolls (for welding with flux cored wire [FCAW])
  • Spool Gun (for welding aluminum)
  • Personal safety products (helmet, gloves)
  • Your local welding distributor can provide shielding gas, additional welding wire and a full product offering.


Product Literature

DC/12.46S Millermatic 212 Auto-Set - Spanish



Flux Cored (FCAW)

General Specifications

Title Millermatic® 212 Auto-Set™ MIG Welder
Industries Interests Racing / Customizing / Restoring
DIY / Home Hobbyist
Farm and Ranch
Metal Art / Sculptures
Boat / Yacht
Weldable Metals Stainless Steel
Input Voltage 208 V
220/230/240 V
Input Phase 1-Phase
Input Hz 60 Hz
Current Type DC
Rated Output 160 Amps at 24.5 VDC, 60% duty cycle
Max Open Circuit Voltage 34 VDC
Amperage Range 30 A - 210 A
Wire Feed Speed 1.3 m/min - 17.8 m/min
50 IPM - 700 IPM
Wire Diameter Solid Steel 0.023 in 0.035 in
Solid Steel 0.6 mm 0.9 mm
Stainless 0.023 in 0.035 in
Stainless 0.6 mm 0.9 mm
Flux Cored 0.03 in 0.045 in
Flux Cored 0.8 mm 1.2 mm
Net Width 19 in
Net Height 30 in
Net Length 40 in
Net Weight 183 lbs
Warranty Miller's True Blue Warranty
Portability Running Gear / Cart (Standard)
Weld Output CV




Reviews & Ratings

Rated 5 out of 5 by from Durable, welds great Easy setup using auto set or manual setting very durable makes great welds day in day out on thin and thicker metal
Date published: 2017-10-01
Rated 5 out of 5 by from Easy to set up and use Easy to set up and easy to use. I am really impressed with the high quality of this machine. One of the best purchases I have ever made
Date published: 2016-04-14
Rated 5 out of 5 by from Excellent Easy to set up and easier to use. Have been using Miller products for several years and the qualilty is superior.
Date published: 2015-08-19
Rated 5 out of 5 by from The animal in my garage I have owned the machine for six years now and it still runs like a champ it takes anything I throw at it and just keeps on running. LOL they say nothing runs like a deer well if they were into welding equipment their deer would be heading for the high country from the fear of this beast. But no really this machine can handle anything from thin gauge sheet metal all the way up to half inch plate.
Date published: 2015-08-19
Rated 5 out of 5 by from Great Product Have welded for 20+ yrs and this welder is really nice you can set it yourself or use the auto set mode whatever you are comfortable with, have not welded the extremes with this welder (22ga, 3/8") but every thing so far works very well. If you are looking for a welder that will do more than just little jobs I would recommend this welder I also recommend getting the spool gun, to weld aluminum also.
Date published: 2015-07-01
Rated 5 out of 5 by from The best there is!!!!!!! Bought the rig for home workshop use, originally was gonna buy the lincoln 216 but lincoln was dragging there feet with the order so i stopped at the near by welder shop and purchased the miller 212 auto. This unit is awesome, i personally dont use the auto set feature but this unit is extremely easy to tune for any application. sure it cost more then a lincoln but id buy this unit over any other machine any day of the week. You cant go wrong with this dude!
Date published: 2015-02-06
Rated 4 out of 5 by from stupid easy to use upgraded from a home center buzzbox to the auto 212. I've been making garden structures - arbors, trellises etc. along with furniture (steel and reclaimed wood) and have had the 212 for about a year and haven't had any problems. Joy to use. Love the auto wire feed speed. I wish the on/off switch was more accessible with a large red light to show if it was on or off. Put it at the top of main panel? I wished it came with a longer ground cable.
Date published: 2014-09-04
Rated 3 out of 5 by from will not feed .023 wire I bought this for my fabrication business. alot of my work is automotive sheet metal replavement. If this is your primary intended use, then this is NPT the machine for you. will not feed .023 wire! i have tried many things over 3 tears i have owned this welder, and it will not feed .023. it also loves to burn back, so you will be trimming the wire after every tack. it will do everything else a welder is suposed to do, and miller quality.
Date published: 2013-11-07
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