AC/DC TIG · Lincoln Electric

Lincoln Electric K5126-1 AC/DC TIG Welder

AC/DC TIG, 120 V

Updated October 2026

Quick verdict

Built for aluminium and thin metal.

Strength
Runs on household 120 V.
Trade-off
Duty cycle not stated with amps.
Right buyer
Aluminium and thin metal.
Processes
TIG and Stick
Input power
120v
Pulse
Pulse
Dimensions (seller)
19.25 x 10.75 x 14 inches
Product weight
46.5 lb
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What it welds

The Lincoln Electric K5126-1 AC/DC TIG Welder is an AC/DC TIG on 120-volt input; its listing doesn't state an output range, so check the rating plate.

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.

Processes, per the maker: TIG and Stick. Check which torches and guns come in the box; a TIG torch or spool gun is often extra. Process guide.

It's AC/DC, so it can weld aluminium as well as steel and stainless. Pulse: Pulse.

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 8 for most of this machine's range (shade 10 for stick above 160 A). Full table.

Also on the listing: dimensions of 19.25 x 10.75 x 14 inches and a weight of 46.5 lb.

Is it the right machine for the job?

Buy it for

  • Aluminium and thin metal

Skip it for

    What it does well, where it falls short

    Does well

    • Runs on household 120 V
    • AC/DC for aluminium
    • Pulse: Pulse

    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 numberK5126-1Retailer
    Dimensions (seller)19.25 x 10.75 x 14 inchesRetailer
    Product weight46.5 lbRetailer
    Input power120vRetailer
    ProcessesTIG and StickRetailer
    PulsePulseRetailer

    Machines to put next to it

    Other tig welders in the same amp range

    Every tig welders on one spec sheet · All Lincoln Electric machines listed

    Final verdict

    Built for aluminium and thin metal.

    Where to buy

    Our links open this exact model's product page. Prices and stock change; check what's included before you order.

    Prices change often; the button shows today's price.

    Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

    Questions buyers ask

    How thick can the Lincoln Electric K5126-1 AC/DC TIG Welder weld?
    The listing doesn't state an output range.
    What is the Lincoln Electric K5126-1 AC/DC TIG Welder's duty cycle?
    The listing doesn't state it with an amperage; check the rating plate or manual.
    What power does the Lincoln Electric K5126-1 AC/DC TIG Welder need?
    120 volts per the maker; the manual states the circuit and plug.