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Lincoln Flextec 350X Construction / LN-25X One Pak - K4278-3

SKU: K4278-3
$9,436.06 $10,462.00
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The Lincoln Flextec 350X Construction / LN-25X One-Pak - K4278-3 is a rugged, versatile welding system with CrossLinc Technology, allowing remote voltage control and enhanced productivity. Featuring a durable Magnum Pro Curve HDE weld gun, it's perfect for demanding field applications.
Overview

The Lincoln Flextec 350X Construction / LN-25X One-Pak system delivers exceptional field welding performance through the integration of advanced CrossLinc Technology, enabling remote parameter control without additional control cables. This comprehensive welding solution combines the rugged Flextec 350X Construction power source with the portable LN-25X wire feeder and Lincoln's premium Magnum PRO Curve HDE welding gun, creating an optimized system for demanding field applications. The unified One-Pak configuration streamlines ordering through a single part number, ensuring all components work seamlessly together right from delivery.

Engineered specifically for harsh environments, this system features trayed and potted PC boards with an IP23 environmental rating, providing superior protection against dust, moisture, and vibration commonly encountered in construction and field erection settings. The revolutionary CrossLinc Technology enables operators to adjust welding parameters directly at the wire feeder hundreds of feet from the power source without cumbersome control cables, significantly improving productivity and weld quality in remote locations. Additionally, the True Voltage Technology (TVT) automatically compensates for voltage drop in long cable runs, ensuring the actual welding voltage matches the preset value.

The portable LN-25X wire feeder features a durable construction with protected meters for parameter monitoring and adjustment in field conditions. Combined with the ergonomic Magnum PRO Curve HDE gun, the system reduces operator fatigue during extended welding sessions while maintaining consistent wire feeding performance. Supporting multiple welding processes including MIG, Flux-Cored, Stick, TIG, and Gouging applications, this versatile system adapts to diverse project requirements across construction, pipeline, fabrication, and maintenance operations. The Flextec 350X Construction / LN-25X One-Pak represents an ideal solution for contractors and fabricators requiring reliable, high-quality welding capabilities in challenging field environments.

Key Features
  • Advanced CrossLinc Technology enabling remote voltage control from the wire feeder without additional control cables.
  • Rugged construction with trayed and potted PC boards providing IP23-rated protection for harsh environmental conditions.
  • True Voltage Technology (TVT) automatically compensating for voltage losses in long cable runs for precise welding parameters.
  • Premium Magnum PRO Curve HDE welding gun delivering superior durability and ergonomic operation for extended use.
  • Portable LN-25X wire feeder designed specifically for field applications with protected meters and robust construction.
  • Multi-process capability supporting MIG, Flux-Cored, Stick, TIG, and Gouging applications for diverse project requirements.
  • Comprehensive One-Pak configuration simplifying ordering with a single part number for complete system acquisition.
  • Tweco-style output connections ensuring secure, efficient welding cable attachment in field environments.
  • USB connectivity supporting firmware updates and welding data management for advanced applications.

Specifications

Product Weights & Dimensions

Dimensions (H × W × D): 17 in × 13 in × 23 in (432 mm × 330 mm × 584 mm)
Net Weight: 127 lbs (34.9 kg)

General Specifications

Machine Processes:

• Stick (SMAW)
• Gouging (CAC-A)
• Flux-Cored (FCAW)
• TIG (GTAW)
• MIG (GMAW)
• Flux-Cored Self-Shielded (FCAW-S)
• Flux-Cored Gas-Shielded (FCAW-G)

Input Voltage: 380 / 460 / 575 / 3 / 50 / 60
Input Current: 18 / 17 / 17, 26 / 23 / 18
Input Hertz: 50 / 65
Input Phase: 3
Input Power: 380 / 460 / 575 / 3 / 50 / 60

Mode Icon: CC / CV
Output Range: 5–425 A
Polarity: DC

Machine Technologies & Connections

Ingress Protection Rating: IP23
Output Range by Mode: 5–425 A
Rated Gouging Carbon Diameter: 1/4 in (6.5 mm)
Data Technologies: USB

Machine Communication Technology:

• Analog
• Digital
• CrossLinc
• ArcLink

Wire Feeder Supply Voltage: 40 VDC
Amphenol Pins (Type of Connector): 5
Work Lead Connector Type: Tweco

Wire Feeding Specifications

Number of Driven Rolls: 2 Rolls
Feeder Type: Portable
Configuration: Single
Max Spool Diameter: 300 mm
Communication Technology: CrossLinc
UI Type: Meters
Max Wire Diameter (Solid): 1/16 in (1.6 mm)
Max Wire Dmeter (Cored): 3/32 in (2.4 mm)
Max WFS: 800 IPM
Feedhead Configuration: Single
Wire Configuration: Single
Power Source to Feeder Communication Connector Type: None
Accessories Communication Connector Type: None
Gun Bushing: Tweco #2–#4

Wire Feeder Processes:

• MIG
• Flux Cored

Applications

Typical Applications:

• Construction
• Cross Country Pipeline
• Construction & Field Erection
• General Fabrication
• Heavy Equipment
• Heavy Fabrication
• Maintenance & Repair
• Offshore
• Pipeline & Offshore
• Power Generator
• Shipbuilding
• Structural Fabrication
• Structural Welding

Warranty

Warranty: 5 Years

Downloads
Includes
  • (1) K4273-1 Flextec 350X PowerConnect
  • (1) Input Power Cord 8.5 ft (2.6m)
  • (1) K4267-2 LN-25X Wire Feeder
  • (1) KP1697-045C 2-Roll Drive Roll 0.045 in Cored
  • (1) K2951-2-10-45 Magnum PRO Curve HDE 250 15 ft
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