SSimder MIG-140S Gasless 3 in 1 MIG Welder

The Simder Welder MIG-140S is a 140A 3-in-1 gasless welder that runs flux core MIG, Lift TIG, and stick on 110V or 220V. No gas tank needed, so a $79.99 machine welds mild steel out of the box — with dual-voltage power that cheap 110V-only welders can't match.

At a Glance

Built For

• Budget-first beginners — a real 3-in-1 welder for less than the price of a single-process machine
• Home garage DIY — car brackets, trailers, shelves, and repair jobs on thin to medium steel
• Outdoor repairs — flux core handles wind and drafts, so no gas tank to lug around
• Dual-voltage flexibility — plug into a 110V household outlet or a 220V shop circuit for full 140A output
• Stick welding — electrode holder included for thick plate and rusty steel
• Not for aluminum welding — this model handles steel and stainless; for aluminum, see the SD-4050 Pro with Pulse MIG
• Not for industrial production — it is a portable DIY/prosumer machine, not a 24/7 factory unit

Full Specifications

How It Compares

What is gasless flux core welding?

Flux core wire carries its own shielding flux inside the wire, so no external gas cylinder or hose is needed. You get MIG-style wire welding that works outdoors in wind, and the machine is ready to weld minutes after unboxing.

Does it run on 110V or 220V?

Both. The MIG-140S accepts dual 110V/220V input — use a standard household outlet, or plug into a 220V circuit (the 220V conversion cord is included) for the full 140A output. Most welders in this price range are 110V-only.

What metals and thickness can it weld?

Flux core welds carbon steel, low-alloy steel, and thin sheet. Lift TIG handles stainless, titanium, carbon steel, alloy steel, and copper. Stick welds thick plate, carbon steel, low-alloy steel, and cast iron. It covers the everyday jobs a home welder actually does.

How does Lift TIG work, and what do I need for it?

Lift TIG starts the arc with a gentle lift instead of a high-frequency start, which is simpler and safer for beginners. It needs a WP17V TIG torch — choose the +TIG Torch bundle ($129.99) or add one later.

Is it beginner-friendly?

Yes. A simple mode switch and current dial replace the intimidating multi-knob panels of bigger machines. IGBT inverter technology keeps the arc stable, and the 5.98 kg (13.18 lb) boxed weight makes it easy to move around.

Can I fix my car in the driveway?

Yes. Flux core MIG repairs brackets, exhaust hangers, tow points, and body supports on mild steel, and the 220V option gives the penetration heavier brackets need. No gas tank means no awkward cylinder sitting next to the car.

What about fence and gate repairs outside?

Flux core is the right tool outdoors — the self-shielding wire keeps the arc stable in wind where gas MIG would fail. Stick mode handles the rusty or thicker posts, and the machine is light enough to carry to the job.

My first project is a garage work table — is this enough?

Plenty. A steel work table, shelf frames, or a small cart are ideal first projects: thin-to-medium steel, mostly flat welds, and forgiving joints. Dial in the current, run a practice bead, and you are welding.

What's included in the box?

MIG welding torch, 0.5 lb flux core wire, electrode holder, ground clamp, 220V conversion cord, and operation manual.

Do I need shielding gas or a tank?

No. The MIG-140S is a gasless flux core welder — the flux inside the wire protects the weld, so there is no gas bottle, regulator, or hose to buy.

Can it weld aluminum?

No — this model is built for steel, stainless, and everyday alloys. For aluminum welding, look at Pulse MIG models like the SD-4050 Pro, which welds aluminum without a spool gun.

What's the difference between the two purchase options?

The $79.99 option is the complete gasless 3-in-1 welder. The $129.99 +TIG Torch bundle adds a WP17V TIG torch, so you can use Lift TIG out of the box without buying the torch separately.

Is it good for a complete beginner?

Yes. Two simple controls — a mode switch and a current dial — replace the multi-knob panels of larger machines, and gasless flux core is the easiest way to start welding. The included manual walks you through setup.

How portable is it?

Very. At 13.18 lb (5.98 kg) boxed with a compact 34 × 20 × 27 cm footprint, it fits in a car trunk or a workshop shelf and moves easily between job sites.

• MIG welding torch × 1
• 0.5 lb flux core wire × 1
• Electrode holder × 1
• Ground clamp × 1
• 220V conversion cord × 1
• Operation manual × 1

Usually, it takes 3-4 days for us to process the order. It will be delivered within 4-6 working days for our US customers when it is out for delivery from our warehouse.Regions such as AK, PR, HI may take longer. In other countries, we’ll have to deliver from our China supplier. It will take a longer time. It will be delivered within 20-30 days.