Forney X-Series 140 MIGx vs Miller Millermatic 142

Last updated: November 1, 2026

The Forney X-Series 140 MIGx and the Miller Millermatic 142 are evenly matched, rated 3.1 and 3.0. The Forney X-Series 140 MIGx leads on value and weight. The Miller Millermatic 142 wins on processes. The Forney X-Series 140 MIGx costs $783.34 less ($429.99 vs $1,213.33).

Forney X-Series 140 MIGx vs Miller Millermatic 142

Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every 120 V MIG welder; a clear win is highlighted. How we rank explains each one.

Factor weightForney X-Series 140 MIGxMiller Millermatic 142
Overall rating3.1/53.0/5
Value 30%53 $3.07 per amp ($429.99, 140 A maximum)0 $8.67 per amp ($1,213.33, 140 A maximum)
Duty cycle 20%10 30% at 90 A, about 12% at full output82 60% at 100 A, about 31% at full output
Processes 15%40 MIG, flux-core60 MIG, flux-core, takes a spool gun for aluminum
Weight 10%88 20.3 lb60 33 lb
Warranty 25%50 3-year warranty on the machine50 3-year warranty on the machine

Specifications

Forney X-Series 140 MIGxMiller Millermatic 142
Output
Input voltage120 V120 V
Maximum output140 A140 A
Rated duty cycle30% at 90 A60% at 100 A, 40 °C
Thickest steel, one pass0.25 in0.188 in
InverterYes-
Processes and wire
Gas MIGYesYes
StickNoNo
TIGNoNo
Spool gun readyNoYes
Wire sizes0.024 to 0.035 in0.024 to 0.045 in
Synergic settingsYesYes
Build
Weight20.3 lb33 lb
Warranty3 years3 years
Released2026-052023-09

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