K4278-2 - Lincoln Flextec 350X Construction / LN-25X One-Pak Multi-Process Welder

Advanced Field Welding Solution

The Lincoln Electric Flextec 350X Construction / LN-25X One-Pak (K4278-2) represents a significant leap forward in field welding technology, specifically engineered for the rigorous demands of construction, shipbuilding, and structural steel erection. This comprehensive package combines the robust Flextec 350X Construction power source with the advanced LN-25X wire feeder, leveraging Lincoln's proprietary CrossLinc Technology. This system is designed to solve common jobsite challenges related to cable management, voltage control, and equipment durability.

At the core of this package is the Flextec 350X Construction model. Unlike standard power sources, this unit is optimized for outdoor and harsh industrial environments. It features an IP23 rating, ensuring protection against weather and contaminants, and is "Desert Duty" rated for operation in extreme heat up to 55°C. The inverter-based technology provides a high-efficiency output of 350 Amps at 60% duty cycle while maintaining a lightweight footprint (approximately 82 lbs), making it significantly easier to transport than traditional transformer-rectifier machines. The unit supports multi-voltage input (380/460/575V 3-Phase), accommodating various industrial power grids.

The inclusion of the LN-25X wire feeder transforms this setup into a powerhouse of productivity. The LN-25X is equipped with CrossLinc Technology, which enables communication between the feeder and the power source directly over the copper weld cable. This innovation eliminates the need for a separate control cable, which is often the weak link in field welding setups due to damage or length limitations. With CrossLinc, operators can adjust voltage and wire feed speed remotely at the feeder, ensuring optimal parameters without traversing back to the power source. This feature not only saves time but also improves safety by reducing cable clutter.

The One-Pak configuration ensures that all necessary components are compatible and ready for immediate deployment. It includes the Magnum PRO Curve 300 gun, known for its durability and comfort, along with necessary drive rolls, flowmeter, and cable assemblies. The system supports a wide array of processes including Stick, DC TIG, MIG, Flux-Cored, and Arc Gouging, making it a versatile asset for diverse project requirements.