The Lincoln Power MIG 180 Dual (K3018-2) is Lincoln Electric's dual-voltage wire welder — the only 180-amp Lincoln MIG that plugs into both 120V household outlets and 208/230V shop circuits without rewiring. Running 120V, it delivers 30–140A for sheet metal, light fabrication, and auto body work. Switch to 208/230V and the output opens up to 180A, handling material through 3/16 in. with solid MIG wire or up to 1/2 in. with flux-cored wire. The K3018-2 also features spool gun ready output — accept the Magnum PRO 100SG for aluminum MIG without adapters — and Lincoln's Diamond Core Technology for a smooth, low-spatter arc across both voltage levels. Free shipping on every order from WeldingMart, an authorized Lincoln Electric dealer since 2003.
| Model | Lincoln Power MIG 180 Dual |
|---|---|
| SKU / Manufacturer Code | K3018-2 |
| Output Amperage Range | 120V: 30–140 A | 208/230V: 30–180 A |
| Duty Cycle | 30% @ 130A (120V) | 30% @ 130A (230V) |
| Input Voltage | 120V / 208V / 230V (dual voltage — no rewiring) |
| Phase | Single-Phase |
| Wire Diameter Range | 0.025–0.035 in. solid wire; 0.030–0.035 in. flux-cored |
| Wire Feed Speed | Contact us for WFS range |
| Welding Processes | MIG (GMAW), Flux-Cored (FCAW), Aluminum (with spool gun) |
| Weight | 64 lbs (29.0 kg) |
| Dimensions (H × W × D) | 14 × 10.2 × 18.6 in. (357 × 258 × 472 mm) |
| Warranty | 3-Year Lincoln Electric Manufacturer Warranty |
The Lincoln Power MIG 180 Dual K3018-2 is the right machine if you need one welder that works at home and in the shop. Home-shop hobbyists and automotive restorers who only have a 120V garage circuit get a capable MIG without running new wiring. Fabricators who move between a garage and a dedicated 230V bay never need a second machine. Farm and ranch operators value the plug-and-go dual voltage on equipment with inconsistent power availability. If your shop runs exclusively on single 230V and you want spool gun aluminum capability on a dedicated circuit, compare the Power MIG 180C (single 230V, spool gun ready).
- True dual voltage — 120V and 208/230V: A single switch selects input voltage. No tool, no rewiring, no separate power supply needed — plug into a 120V outlet at home or a 230V outlet at the shop.
- Spool gun ready for aluminum MIG: The K3018-2 is wired for the Magnum PRO 100SG spool gun. Disconnect the MIG gun, plug in the spool gun, and weld aluminum without a push-pull system or adapter kit.
- Diamond Core Technology: Lincoln's arc-control system delivers consistent starts, low spatter, and a forgiving arc across the full amperage range — on both voltage settings.
- Tool-less polarity change: Switch from solid MIG wire (DCEP) to gasless flux-cored wire (DCEN) in seconds with the quick-release polarity connector inside the wire compartment.
- Cold wire feed and spot timer: Built-in cold wire feed for precise positioning before striking an arc, plus a spot/stitch timer for controlled tack welds on thin sheet metal.
- Industrial-grade wire drive: Cast-aluminum, four-roll drive with dual-knob tension control feeds .025–.035 in. wire consistently without birdnesting.
- Lincoln Electric 3-Year warranty: Full manufacturer warranty covers the power source for 3 years through Lincoln Electric's North American service network.
- Lincoln Power MIG 180 Dual MIG welder (K3018-2)
- Magnum PRO 100L 10-foot MIG gun and cable assembly
- Work clamp and work cable
- Gas hose, regulator, and flowmeter
- 0.025 in. and 0.035 in. drive rolls
- Copper Plus contact tips
- Operator's manual
- Browse all MIG welders — compare the full Lincoln Power MIG lineup side by side
- ER70S-6 MIG wire — recommended solid wire for the Power MIG 180 Dual on steel
- Power MIG 180C (single voltage, 230V only) — the spool gun ready single-voltage 180-amp alternative
- Welding accessories — contact tips, nozzles, drive rolls, and liners for the Magnum PRO gun
The Power MIG 180 Dual K3018-2 runs on both 120V and 208/230V — you choose the voltage with a switch. The Power MIG 180C K2473-2 operates only on 208/230V single voltage and is heavier (80 lbs vs 64 lbs), reflecting a more robust internal transformer. The 180C is a dedicated shop machine; the 180 Dual is a portable dual-voltage machine. Both are spool gun ready for aluminum. If you have a 120V garage circuit and sometimes use 230V, buy the 180 Dual K3018-2.
Yes. The K3018-2 is spool gun ready — connect the compatible Magnum PRO 100SG spool gun (sold separately), select the appropriate drive roll and contact tip, and weld aluminum alloys with ER4043 or ER5356 wire. No push-pull kit required.
Both. The Lincoln Power MIG 180 Dual accepts 120V (standard household outlet) and 208/230V (standard shop outlet) input. A selector switch on the rear panel sets the voltage. At 120V, output is limited to 30–140A. At 208/230V, output extends to 30–180A. No rewiring required between voltage selections.
The machine feeds 0.025 in. and 0.035 in. solid MIG wire, and 0.030–0.035 in. flux-cored wire. Drive rolls for both sizes are included. Use 0.025 in. ER70S-6 for light sheet metal work at 120V; use 0.030–0.035 in. on thicker stock at 230V.
WeldingMart is an authorized Lincoln Electric dealer shipping the Power MIG 180 Dual K3018-2 with free freight from our Wisconsin warehouse. Every unit is new, factory-sealed, and backed by Lincoln Electric's full 3-year manufacturer warranty. Our certified welding specialists can help you select the right wire, gas mixture, and spool gun configuration before you buy — call or chat. Order today and get the only 180-amp Lincoln MIG welder that works on both 120V and 230V.