Harbor Freight
58828
Unlimited 140
OutputGMAW/FCAW 30–140 A. SMAW 30–75 A. GTAW 20–110 A.
DutyGMAW/FCAW 30% at 90 A. SMAW 40% at 75 A. GTAW 20% at 110 A.
Input120 VAC / 60 Hz. Current input: GMAW/FCAW 21 A, SMAW 21.3 A, GTAW 20.5 A.
PlugPlug not printed
10 min cycle, 120V
30% · 3.0 min on · 7.0 min off
Duty line does not name a voltage. GMAW/FCAW 30% at 90 A.
Does not pass 120V/15A
Does not pass 240V/50A
Sheet
Copied from the cited page. Not taken from another model or a review.
| Spec | Published value | Source, checked 2 November 2026 |
|---|---|---|
| Process | GMAW/FCAW, SMAW, and GTAW. | Owner’s manual item 58828, specifications |
| Output amp range | GMAW/FCAW 30–140 A. SMAW 30–75 A. GTAW 20–110 A. | Specifications, welding current range |
| Rated duty cycle | GMAW/FCAW 30% at 90 A. SMAW 40% at 75 A. GTAW 20% at 110 A. | Specifications, rated duty cycle |
| Input voltage and plug | 120 VAC / 60 Hz. Current input: GMAW/FCAW 21 A, SMAW 21.3 A, GTAW 20.5 A. | Specifications, power input and current input |
| Wire or rod size | Solid core .025 / .030 / .035 in. Flux-cored .030 / .035 in. Wire speed 80–275 IPM. Spool capacity up to 12 lb. | Specifications, welding wire capacity |
| Weight | Not published by manufacturer | The specifications block does not print a machine weight. |
| Material thickness | Not published by manufacturer | The specifications block does not print a material thickness. |
Notes on the source
- Open-circuit voltage in this manual is 69 VDC.
Manufacturer page · Job check · Harbor Freight
From the table
What output does the Unlimited 140 publish?
GMAW/FCAW 30–140 A. SMAW 30–75 A. GTAW 20–110 A. Source: https://manuals.harborfreight.com/manuals/58000-58999/58828-193175447272.pdf
What duty cycle does the Unlimited 140 publish?
GMAW/FCAW 30% at 90 A. SMAW 40% at 75 A. GTAW 20% at 110 A. Source: https://manuals.harborfreight.com/manuals/58000-58999/58828-193175447272.pdf
What input does the Unlimited 140 publish?
120 VAC / 60 Hz. Current input: GMAW/FCAW 21 A, SMAW 21.3 A, GTAW 20.5 A.
Which processes does the Unlimited 140 publish?
MIG, flux-cored, stick, TIG.