The Frontier 400X is an advanced engine-driven welder/generator offering best-in-class arc performance, coupled with the latest welding innovation for maximum versatility on the jobsite. The machine's multi-process capability provides optimized CC and CV modes, plus specialized modes to support mechanized equipment and advanced GMAW applications including STT® and pulse welding. The machine features an industry-first, next-gen display with enhanced operator-focused features, such as save and recall weld parameter memories, maintenance reminders, and optional PIN user authorization.
Additional features include Auto-Stop/Start technology to help reduce engine idling, save on fuel costs, and avoid excessive wear on the engine, along with CrossLinc® Technology, which allows the adjustment of machine output at the arc to promote productivity, site safety, and overall weld quality. Experience the latest in welding innovation!
- Full Job-Site Versatility – Offers up to 400 amps (IEC rated at 325 amps) of welding current to tackle numerous welding and carbon arc gouging applications. Includes six optimized CC and CV modes, plus advanced modes to support pulsed TIG, pulsed MIG, STT®, and mechanized equipment.
- All Day Auxiliary Power – Provides up to 11 kW of continuous three-phase power to run industrial tools such as plasma cutters, pumps, or inverter welders.
- Next-Gen Display – Bright, durable 7 in. digital user interface for unmatched machine control - Save and recall memories, receive maintenance reminders, and enable PIN authorization.
- CrossLinc® Enabled – Allows communication through a standard weld cable to enable voltage or current control at the arc without a control cable to help improve safety, quality, and productivity with less trips to the power source and reduced jobsite clutter. Built-in True Voltage Technology (TVT) compensates for voltage drop to further improve operations.
- Run Longer and More Efficient – Weld longer with a class-leading 20 US gal. (75.7 L) fuel tank and integrated Auto-Stop/Start feature, designed to prevent excessive idling to help save on fuel costs, avoid unnecessary engine wear, and extend time between required maintenance.
- Field-Proven Diesel Engine – Powered by a 24.8 hp, naturally aspirated Kubota® diesel engine to provide extremely smooth and quiet operation while meeting EPA Tier 4 Final compliance.
- Trusted Reliability – Engineered tough to withstand harsh conditions and backed by trusted industry support and 3-year warranty.
| Dimensions (H x W x D) | 35.9 in x 25.3 in x 60 in (913 mm x 643 mm x 1524 mm) |
| Net Weight | 1035 lbs (469 kg) |
| Machines Processes | Stick (SMAW) Gouging (CAC-A) TIG (GTAW) MIG (GMAW) Pulsed MIG (GMAW-P) Flux-Cored Self-Shielded (FCAW-S) Flux-Cored Gas-Shielded (FCAW-G) Orbital MIG |
| Open Circuit Voltage | 71 Peak OCV at 1800 RPM |
| IEC Rating | 325A / 33V / 100% @ 104°F (40°C) |
| Output Range by Mode | Stick (SMAW): 30 - 400 Amps CV-Wire (GMAW, FCAW-S, FCAW-G): 10 - 45 Volts DC TIG (GTAW): 5 - 400 Amps Arc Gouging (CAC-A): 60 - 400 Amps |
| Rated Gouging Carbon Diameter | 5/16" (8.0 mm) |
| Machines Communication Technology | CrossLinc |
| Single Phase Auxiliary Output | 10,000 Watts Continuous / 11,500 Watts Peak, 120/240V |
| Three Phase Auxiliary Output | 11,000 Watts Continuous / 12,500 Watts Peak, 240V |
| Auxiliary Output Frequency | 60 Hz |
| Receptacle Types | NEMA 5-20R NEMA 14-50R NEMA 15-50R |
| Engine Brand & Model | Perkins® 403F-15T |
| Engine Description | 3 Cylinder Turbocharged Water Cooled Diesel Engine |
| Engine Horsepower | 24.7 hp (18.4 kW) |
| Engine Block Size & Displacement | 91 cu. in (1.5 L) Bore x Stroke - 3.3 in x 3.5 in (84 mm x 90 mm) |
| Emissions Rating | US EPA Tier 4 Final |
| High Idle Operating Speed @ Rated Output | 1800 |
| Low Idle Operating Speed | 1440 |
| Sound Rating @23 ft. (7m) | 67 dBA at Low Idle 71 dBA at High Idle |
| Fuel Tank Size (US gal.) | 20 US gal. |
| Fuel Tank Size (L) | 75.7 L |
| Oil Capacity (qts.) | 6.4 qts. |
| Oil Capacity (L) | 6.0 L |
| Coolant Capacity (US gal.) | 1.8 US gal. |
| Coolant Capacity (L) | 6.8 L |
| Typical Application | Construction Mining Railroad Maintenance Cross Country Pipeline Construction & Field Erection Maintenance & Repair Offshore Oil & Gas Power Generation Shipbuilding Structural Fabrication Structural Welding |
| Warranty | 3 Years Parts and Labor on the welder — 5 Years on the Frontier Digital User Interface — engine warranted separately by the engine manufacturer |
Lincoln lists the welding processes for the Frontier 400X as: SMAW, FCAW, GMAW, GTAW, CAC-A. Source: Lincoln spec sheet E6.59.
Yes. Lincoln publishes the auxiliary AC generator output for the Frontier 400X as: Single Phase: 10 kW Continuous, 11.5 kW Peak, 120V/240V @ 60 Hz; Three Phase: 11 kW Continuous, 12.5 kW Peak, 240V @ 60 Hz (Single Phase 120V/240V @ 60 Hz; Three Phase 240V @ 60 Hz). Lincoln publishes these figures for the Frontier 400X at model level; no Lincoln document names product number K3484-1, so treat them as model-level, not machine-specific. Lincoln publishes these receptacles for the Frontier 400X:
- NEMA 5-20R — 120V, 20A, NEMA 5-20R (120V / 20A / 1~)
- NEMA 14-50R — 120/240V, 50A, NEMA 14-50R (120/240V / 50A / 1~)
- NEMA 15-50R — 240V, 50A, NEMA 15-50R (240V / 50A / 3~)
Source: Lincoln spec sheet E6.59.
The Frontier 400X on this listing is powered by a Perkins 403F-15T diesel engine, 24.7 hp. Perkins engines in this line are diesel only. Lincoln publishes this engine configuration for the Frontier 400X at model level; no Lincoln document names product number K3484-1. Source: Lincoln spec sheet MC21-71.
Yes — this is a factory demo or low-hour unit directly from Lincoln Electric. Units may show light cosmetic marks from display use but are mechanically sound. The warranty on this unit is the same as on a new machine. Lincoln’s Industrial Limited Warranty (form IMWS1, Apr-2026) lists a 3-year warranty period for “All Lincoln welding machines, wirefeeders & plasma cutting machines”, and Lincoln states: “Lincoln will assume both the parts and labor expense of correcting defects during the warranty period.” Lincoln lists a longer, 5-year period for the “Digital User Interface on Frontier Models Only”. As on a new machine, the engine is not covered by Lincoln’s warranty — Lincoln states: “All engines and engine accessories are warranted by the engine or engine accessory manufacturer and are not covered by this warranty.” This machine’s Perkins 403F-15T engine is warranted by Perkins: “Two Years on parts and labor on 100 and 400 series (2,000 hours) and 1000 and 1100 series (3000 hours). Three years major components, worldwide.”, and that term “BEGINS ON DATE OF PURCHASE BY END USER.” Lincoln directs buyers to the engine maker — WWW.PERKINS.COM / 1-888-PERK-ENG (737-5364). See Lincoln Engine Drive Motors Warranty Contacts. Source: Lincoln Electric Industrial Limited Warranty (form IMWS1, Apr-2026).
This factory demo unit is supplied as the machine only, verified directly by WeldingMart’s owner. Lincoln publishes no What’s Included list for this product number. Not included: welding leads (electrode and work cable), electrode holder, work clamp, and accessory kits. No printed operator’s manual, WeldingMart demo-prep certification document or Lincoln warranty registration paperwork ships with the machine. Consumables (electrodes, gas cylinders) are not included. Leads, holders, clamps, cable connectors, undercarriages, spark arrestors, remote controls and wire feeders are sold separately — contact WeldingMart and we will quote the exact set you need.