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Millermatic® 140 Auto-Set™

All-in-one wire welder that welds 24 gauge - 3/16 in. (0.8-4.8mm) mild steel. The simplest Millermatic to set-up and start welding.

Millermatic 140 Auto-Set
  • Millermatic 140 Auto-Set
  • Millermatic 140 Auto-Set Front Panel
  • Millermatic 140 Auto-Set Inside
Base Model Starting at:
$879.00 List Price (US$)

Additional Models and Pricing

Auto-Set™

Auto-Set™
A breakthrough control that automatically sets your welder to the proper parameters.Auto-Set offers all-in-one MIG minus the guesswork! Simply set the wire diameter, set the material thickness and start welding!

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.

Thermal Overload Protection

Shuts down the unit and activates over-termperature light if airflow is blocked or duty cycle is exceeded. Automatically resets when fault is corrected and unit cools. See how it works.

Standard Built-In Solid-State Contactor Circuit

Makes wire electrically "cold" until trigger is pulled. This makes the unit safer and torch easier to position before starting to weld.

Smooth-Start™

This technology provides a smooth, spatter-free start. The best starting machine in the small MIG category! No more pop-gun starts or spatter to clean up.

Durable Cast Aluminum Drive System

Incorporates dual groove quick-change drive roll and spring-loaded tension arm with calibrated tension knob, all designed to make setup easier and faster.

'Tip Saver' Short Circuit Protection

Shuts down output when tip is shorted to the work. Extends contact tip life and protects internal components from damage. Trigger reset permits quick reset at torch rather than unit. See how it works.

Easy Access to Output Studs

Provides convenient polarity changeover when switching from solid or flux cored wires.
 
ProcessesMIG (GMAW) 
Flux Cored (FCAW) 
Material Type
Max 3/16 in (4.8 mm)
Mild Steel
Min 24 ga (0.8 mm) 		Max 14 ga (1.9 mm)
Aluminum
Min 18 ga (1.2 mm)
* Aluminum welding uses optional Spoolmate 100 series spool gun and 4043 Series aluminum wire.
General specificationsInput Power
Requires 1-Phase power
 
115 V, 20 Amps, 60 Hz
Rated Output
90 Amps at 18 VDC, 20% duty cycle
Welding Amperage Range
30 - 140 Amps
Wire Speed
15 - 390 IPM (1.0 - 12.7 m/min)
Net Weight60lb (27.3kg)
WireDiameter Capacity
.024 - .030 in (0.6 - 0.8 mm) Solid Steel
.024 - .030 in (0.6 - 0.8 mm) Stainless
.030 - .035 in (0.8 - 1.2 mm) Flux Cored
MaxSpoolSize Capacity
8 in (203 mm)
ApplicationsFarm and Ranch 
Field Maintenance and Repair 
Home/Hobby 
Mechanical Contracting 
Metal Art/Sculpture 
Motorsports (car, truck, bike, etc.) 
Schools/Training 
Welding Projects 
Spool Gun Option SPOOLMATE 100 SERIES See Spool Gun Hook-up Chart
Product Literature
Spec Sheet (ENG)
Spec Sheet (SPA)
Spec Sheet (FRE)
Millermatic Buyers Guide 		 
Warranty True Blue With the best coverage in the industry, Miller's True Blue® Warranty [PDF] delivers unparalleled peace-of-mind.

Models

 Stock # Manufacturer List Price US$  
Millermatic® 140 Auto-Set™ 907335 $879.00   Buy Now
  PKG,MILLERMATIC 140AS W/RUNNING GEAR/CYLINDER RACK  951373 $974.00   Buy Now
       

Most Popular Accessories

Stock# Manufacturer List Price US$   US and Canada Add to list

Spoolmate 100 Series

Your choice for exceptional aluminum welding results for do-it-yourself projects. Reliable and economical direct connect Spoolmate™ 100 spool gun provides 12 ft of cable reach and accessibility.

300371$268.00 Buy Now
 View Accessories for Spoolmate 100 Series   
 View Accessories for Spoolmate 100 Series   
 NOZZLE, 9/16" WIRE186405$7.63  
 CONTACT TIP, .035" WIRE 5 Per Pkg186406$1.70  
 DRIVE ROLL,.030-.035" WIRE186413$15.09  
 PUSH ROLL,.030-.035" WIRE186414$16.59  
 CONTACT TIP, .030" WIRE 5 Per Pkg186419$1.73  
 CONTACT TIP, .023" WIRE 5 Per Pkg199730$1.69  
 DRIVE ROLL,.023" WIRE199731$15.24  
 PUSH ROLL,.023" WIRE199732$16.59  
 KIT,FIELD RETRO MM140/180 TO SPOOLMATE 100300409$59.00 Buy Now
    

Small Running Gear - Cylinder Rack

Durable construction. For gas cylinders no larger than 7 in (178 mm) diameter. Maxiumum weight 75 lb (34kg).

300425$99.00 Buy Now
 View Accessories for Small Running Gear - Cylinder Rack   
 View Accessories for Small Running Gear - Cylinder Rack   
 Standard Cylinder Rack042887$216.00  
    

Running Gear/Cylinder Rack

Heavy-duty construction. For gas cylinders no larger than 7 in (178 mm) diameter, maximum weight 100 lb (45 kg).

770187$174.00 Buy Now
 View Accessories for Running Gear/Cylinder Rack   
 View Accessories for Running Gear/Cylinder Rack   
 Standard Cylinder Rack042887$216.00  
    

Protective Cover, Millermatic

Covers unit with weld cables connected. Cutout allows access to handle for portability. Oversized storage pocket. Can be used to store cables.

195149$45.00 Buy Now

M-100 GUN 10FT .030-.035 (REPLACEMENT)

248282$180.00 Buy Now
 View Accessories for M-100 GUN 10FT .030-.035 (REPLACEMENT)   
 View Accessories for M-100 GUN 10FT .030-.035 (REPLACEMENT)   
 CONTACT TIP,.030" WIRE 10 Per Pkg000067$1.51 Buy Now
 CONTACT TIP,.035" WIRE 10 Per Pkg000068$1.51 Buy Now
 CONTACT TIP,.045" WIRE 10 Per Pkg000069$1.51 Buy Now
 CONTACT TIP,.023" WIRE 10 Per Pkg087299$1.51 Buy Now
 NOZZLE,FLUSH ,STICKOUT 2 Per Pkg169715$10.19 Buy Now
 CONTACT TIP ADAPTER,M-10 & M-15 GUNS 2 Per Pkg169716$9.59 Buy Now
 LINER,.023-.025" WIRE, 15 ft194010$21.26 Buy Now
 LINER,.030-.035" WIRE, 15 ft194011$21.06 Buy Now
 LINER,.035-.045" WIRE, 15 ft194012$21.06 Buy Now
 LINER, 3/64" AL WIRE, 15 ft194014$28.04  
 NOZZLE,FLUX CORED WELDING226190$7.16  
 NOZZLE,M-100 .500 ORF FLUSH (CU) 2 Per Pkg246372$8.79  
    
 

GUIDE,WIRE INLET 1/16 3 Per Pkg

058549$5.25  

DRIVE ROLL, .030-.035/.045" FLUX CORED WIRE

202926$20.21 Buy Now

ROLL,DRIVE V GROOVE .024,.030-.035 WIRE

220179$16.33 Buy Now

KIT,FIELD RETRO MM140/180 TO SPOOLMATE 100

300409$59.00 Buy Now
       
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