Forney 309 MIG Welder: 120 V

What it welds

The Forney 309 MIG Welder is a MIG / gas on 120-volt input; its listing doesn't state an output range, so check the rating plate.

The maker's thickness claim reads "Welds up to 1/4 inch".

The listing doesn't give a duty cycle with its amperage, which makes long beads hard to plan; the rating plate or manual should state it. Why it matters.

It runs solid wire under shielding gas (Argon/Co2) for the cleanest wire-feed welds; most machines like it also run flux-core wire outdoors.

A 120-volt machine runs from a household circuit, usually a 20-amp one per the manual. 120 V vs 240 V.

Eye protection: OSHA's minimum is shade 10 for most of this machine's range. Full table.

Also on the listing: a weight of 62 lb.

Warranty, per the listing: 5/3/1 warranty against manufacturer defects.

Is it the right machine for the job?

Buy it for

Clean steel welds indoors

Skip it for

What it does well, where it falls short

Does well

Runs on household 120 V

Falls short

Duty cycle not stated with amps
120 V caps output
Output range not stated

Power and setup notes

Ratings are the maker's own, stated under the maker's conditions. Follow the manual, wear eye protection of at least OSHA's minimum shade, keep combustibles away, ventilate, and have a licensed electrician install new circuits.

Rated output and specs

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model number	309	Retailer
Power	Corded Electric	Retailer
Features (seller)	Quick Start Guide	Retailer
Warranty	5/3/1 warranty against manufacturer defects	Retailer
Input power	120 V	Retailer
Product weight	62 lb	Retailer
Output range	140-Amp	Retailer
Max steel (maker)	Welds up to 1/4 inch	Retailer
Shielding gas	Argon/Co2	Retailer