The Frontier 400X Pipe 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. Included only in the Frontier 400X Pipe is a new, specialized Pipe mode made to produce the classic DC-style arc for downhill pipe applications.
The Frontier 400X Pipe delivers unmatched job-site versatility with up to 400 amps (IEC rated at 325 amps) of welding current to tackle numerous welding and carbon arc gouging applications. The machine features optimized CC and CV modes, specialized modes to support mechanized and pulse welding, and a dedicated Pipe mode with DigFX technology to produce the iconic, smooth DC-style arc specifically designed for downhill pipe welding applications. This specialized pipe mode sets the Frontier 400X Pipe apart from standard models, making it the ideal choice for pipeline contractors and other professionals focused on pipe welding operations. For auxiliary power needs, the unit provides up to 11 kW of continuous three-phase power to run industrial tools such as plasma cutters, pumps, or inverter welders, ensuring operators have reliable power for all their equipment requirements.
The Frontier 400X Pipe features a bright, durable 7-inch digital user interface that represents a next-generation approach to machine control, allowing operators to save and recall memories, receive maintenance reminders, and enable PIN authorization for enhanced security and personalized settings. CrossLinc technology allows communication through a standard weld cable to enable voltage or current control at the arc without a control cable, helping to improve safety, quality, and productivity with fewer trips to the power source and reduced jobsite clutter. The built-in True Voltage Technology compensates for voltage drop to further improve operations and weld quality. For extended operation, the machine features 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. Powered by a 24.7 hp, turbocharged Perkins diesel engine, the Frontier 400X Pipe provides extremely smooth and quiet operation with excellent cold-weather starting and high altitude performance while meeting EPA Tier 4 Final compliance standards. Engineered tough to withstand harsh conditions and backed by trusted industry support and a 3-year warranty, the Frontier 400X Pipe represents the latest in welding innovation for demanding pipeline and industrial applications.
- Full Job-Site Versatility – Up to 400 amps with dedicated Pipe mode featuring DigFX technology
- All Day Auxiliary Power – Provides up to 11 kW of continuous three-phase power
- Next-Gen Display – Bright, durable 7 in. digital user interface for unmatched machine control
- CrossLinc Enabled – Allows communication through a standard weld cable to enable voltage or current control at the arc
- Run Longer and More Efficient – 20 US gal. fuel tank and integrated Auto-Stop/Start feature
- Field-Proven Diesel Engine – Powered by a 24.7 hp, turbocharged Perkins diesel engine
- Trusted Reliability – Engineered tough and backed by 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/Pipe (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 Pipeline & Offshore 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 Pipe as: SMAW, FCAW, GMAW, GTAW, CAC-A. Lincoln also lists a dedicated Pipe mode and DigFX, with pulsed MIG / STT available via the Activ8X Pipe feeder. Source: Lincoln spec sheet E6.59.1.
Yes. Lincoln publishes the auxiliary AC generator output for the Frontier 400X Pipe 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 receptacles for this machine:
- 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 E6.59.1.
The Frontier 400X Pipe on this listing is powered by a Perkins 403F-15T, turbocharged diesel engine, 24.7 hp. Perkins engines in this line are diesel only. Source: Lincoln spec sheet E6.59.1.
Duty cycle varies by output setting. The Frontier 400X Pipe is 100% duty cycle at its 325 A / 33 V IEC rating, but only 60% duty cycle at its 400 A / 26 V maximum rating — the full 400 amps is not a continuous-duty output. Both ratings are at 104°F (40°C).
| Welding process / output mode | Rating basis | Amperes | Volts | Duty cycle | As printed by Lincoln |
|---|---|---|---|---|---|
| Rated output (mode not broken out) | IEC Rating | 325A | 33V | 100% | IEC Rating – 325A / 33V / 100% |
| Rated output (mode not broken out) | Max Rating | 400A | 26V | 60% | Max Rating – 400A / 26V / 60% |
| Mode / parameter | Range |
|---|---|
| Stick / Pipe | 30 – 400 Amps |
| DC TIG | 5 – 400 Amps |
| MIG / FCAW | 10 – 45 Volts |
| Arc Gouging | 60 – 400 Amps |
| Open circuit voltage | 71 Peak OCV @ 1800 RPM |
| Rated ambient temperature | Column header: "Rated Output @104°F (40°C)" |
| Specification | As printed by Lincoln |
|---|---|
| Peak / surge output | Single Phase 11.5 kW Peak; Three Phase 12.5 kW Peak |
| Continuous output | Single Phase 10 kW Continuous; Three Phase 11 kW Continuous |
| Single-phase | Single Phase: 10 kW Continuous, 11.5 kW Peak, 120V/240V @ 60 Hz |
| Three-phase | Three Phase: 11 kW Continuous, 12.5 kW Peak, 240V @ 60 Hz |
| Frequency / phase | Single Phase 120V/240V @ 60 Hz; Three Phase 240V @ 60 Hz |
| Receptacle | Voltage | Amperage | NEMA type |
|---|---|---|---|
| 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 Electric publication E6.59.1 (Issue Date 07/26 (revised since the 07/23 issue recorded in oem_verification.md)) — view the Lincoln spec sheet PDF. Figures are Lincoln's own; “NOT STATED” means Lincoln does not publish that value for this machine.
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).
Lincoln’s own included-items list for K3485-1 is: Machine Only (Lincoln K3485-1). This factory demo unit is supplied the same way. 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.