Miller MIG Machine Support

Millermatic 140 Auto-Set

Discontinued 115 V light industrial MIG and flux-cored machine with Auto-Set, M-100 gun support, Spoolmate 100 aluminum option, and M-Series consumable path.

MIG (GMAW)Flux-cored (FCAW) Light industrial Discontinued

Discontinued Legacy Machine

Use this page for the discontinued Millermatic 140 Auto-Set. The Millermatic 142 is the current replacement path and has its own machine page, stock numbers, ratings, and MDX-100 gun package details.

View the replacement Millermatic 142 page

Processes

MIG (GMAW), Flux-cored (FCAW)

Welding range

30 - 140 A

Input power

115 V, 20 A, 60 Hz, single-phase

Wire feed speed

15 - 390 ipm (0.4 - 9.9 m/min.); 35 - 420 ipm at no load (0.9 - 10.7 m/min.)

Weight

60 lb. (27.3 kg); 67 lb. (30.5 kg) shipping weight

Class

Light industrial

Machine Packages

Stock number	Catalog package
907335	Machine, 115 V, 60 Hz
907335-01-1	Machine with small running gear/cylinder rack

Compatible Accessories

Running Gear/Cylinder Rack

770187 Heavy-duty running gear/cylinder rack listed on the 2010 data sheet.

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Small Running Gear/Cylinder Rack

300425 Small running gear/cylinder rack shown with the 907335-01-1 package path.

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Protective Cover

195149 Millermatic protective cover listed on the 2010 data sheet.

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CO2 Regulator/Flow Gauge

212492 Required if using 100 percent CO2 gas; order from Miller Service Parts.

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Material Thickness Gauge

229895 Material thickness gauge listed with the Millermatic 140 Auto-Set package.

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Dual-Groove V-Smooth Drive Roll

220179 Quick-change drive roll for .024, .030, and .035 in. wire.

Open support page

Dual-Groove V-Knurled Drive Roll

202926 Quick-change drive roll for .030/.035 in. or .045 in. flux-cored wire.

Open support page

Compatible Guns / Torches

M-100 Replacement Gun

248282 10 ft. M-100 replacement gun listed on the DC/12.42 sheet for the discontinued Millermatic 140 Auto-Set.

Open support page

Spoolmate 100 Series Spool Gun

300371 Direct-connect spool gun option listed for Millermatic 140, 180, 211, and Passport Plus models.

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Replacement Gun Path

OEM sheet path

M-100 Replacement Gun

248282 Primary replacement gun path from the September 2010 DC/12.42 sheet: 10 ft. M-100, .030 - .035 in. wire, shipped with liner 194011.

Open M-100 parts

Older installed-gun page

Millermatic 140 with M-10 Gun

Use this existing support page when the machine has an M-10 style gun installed. Match consumables to the installed gun before ordering.

Open M-10 140 page

Current family check

MDX-100 Current Light-Industrial Path

1770028 The replacement machine, Millermatic 142, uses the MDX-100 gun family. Verify connector, gun package, and service guidance before treating MDX-100 as a direct replacement for the discontinued 140 Auto-Set.

Open MDX-100 parts

Aftermarket Replacement Guns & Torches

Looking for an aftermarket replacement gun or torch for this machine? Compare compatible replacement options by brand, connector type, amperage, cable length, and verification status.

View Aftermarket Replacement MIG Guns

Full machine details

Welding Output

90 A at 18 VDC, 20% duty cycle
63 A at 21 VDC, 20% duty cycle, CSA

Wire Capacity

Mild/stainless steel: .024 - .030 in. (0.6 - 0.8 mm)
Flux-cored: .030 - .035 in. (0.8 - 0.9 mm)

Material Capacity

Mild steel: 24 ga. to 3/16 in. (0.8 - 4.8 mm)
Aluminum: use optional Spoolmate 100 Series spool gun

Included With This Machine

10 ft. (3 m) M-100 MIG gun and cable assembly
10 ft. (3 m) work cable and clamp
6 ft. (1.8 m) power cord and plug
Smith Argon and Ar/CO2 mix regulator/flow gauge with hose
Spool of Hobart .030 in. solid wire
Two contact tips for .024 in. wire and two contact tips for .030 in. wire
Dual-groove quick-change drive roll for .024 in. or .030/.035 in. wire
Factory-installed gas solenoid valve, setup CD, information/settings chart, and material thickness gauge

Dimensions

H: 15.75 in. (400 mm), W: 10.625 in. (273 mm), D: 17.5 in. (444 mm)

Source: Miller Electric Millermatic 140 Auto-Set Spec Sheet, Issued September 2010, index DC/12.42. Product relationships on this page are kept separate from Amazon monetization data. Amazon buy buttons appear only after the product match, manufacturer, package quantity, and compatibility are verified.