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

Code: K4278-3

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Lincoln Flextec 350X Construction / LN-25X One Pak K4278-3
Lincoln Flextec 350X Construction / LN-25X One Pak K4278-3 1

Cyberweld Price $8,374.00
Cyberweld Price $8,374.00
Mfg Industrial Price: $10,743.00
(You Save $2,369.00)
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Lincoln® Flextec® 350X Construction / LN-25X® One Pak® K4278-3

The Lincoln® Flextec® 350X Construction / LN-25X® One Pak® is a complete 350 amp multi-process welder / voltage-sensing wire feeder package. The system includes a Flextec 350X Construction multi-process welder that is capable of MIG, Flux-cored, DC TIG and Stick welding. It also comes standard with an LN-25X® voltage sensing wire feeder with CrossLinc®, and Magnum® PRO Curve™ HDE™ MIG welding gun.

Built-in CrossLinc® technology included in both the welding power source and the feeder means that the Flextec 350X communicates with the LN-25X wire feeder directly through your welding leads. Full remote amperage and voltage control is achieved without the use of a separate remote-control cable. This completely eliminates the need to go back to the welding machine to make output voltage adjustments.

The Flextec 350X Construction is built to be a rugged performer on the harshest job sites. It is rated IP23 for welding in outdoor weather conditions. The 350X also comes with Lincoln's Desert Duty® certification, meaning it can keep welding in temperatures up to 131 degrees F. Heavy duty alloy carrying handles, powder-coated aluminum case and shock absorbing rubber feet make this an impact resistant power source that will stand up to abuse.

The Flextec 350X Construction operates on 380-575 volt, three-phase input power and comes with Tweco®-style cable receptacles and Lincoln's three-year warranty.

The LN-25X wire feeder comes standard with TVT™. True Voltage Technology compensates for voltage drops common with long welding cable runs. TVT automatically detects welding voltage variations and adjust on-the-fly, to provide a smooth consistent arc, even if you are far away from the welder itself. The LN-25X wire feeder has up to a 450 amp welding capacity. It features Lincoln's MAXTRAC® wire drive system, to ensure smooth wire feeding and excellent electrical contact with your welding gun. It comes complete with Magnum® PRO Curve HDE™ 250 amp MIG gun with 15 foot leads and .045 drive rolls for cored-wire.

  • MIG (GMAW)
  • Flux-Cored (FCAW)
  • Stick (SMAW)
  • Air-Carbon Arc Gouging (CAC-A)


  • LN-25X® with CrossLinc® Included in Package
    Includes 15 ft. Magnum® PRO Curve HDE&trade 250 MIG Gun
    Trigger Interlock Switch Provides operator comfort for long welds
    Maxtrac® Wire Drive System Heavy-duty cast aluminum wire drive system provides reliable feeding and durability

    Replaceable and Flame Resistant Case Protects internal components, easy to replace
    Potted PC Boards ° For moisture and corrosion protection
    Split Wire Guide -Reduces bird nesting and allows for easy cleaning no-fuss wire guide alignment
    Bright digital meters for easy viewing even in bright sunlight
    Included Tweco style male connector on input power cable.
    Weld Timers Pre-Flow, Post-Flow, and Burn Back
    Adjustable Wire Run-In Speed for softer starting
    Configurable for English or metric units
    Arc Hours Meter
  • CrossLinc® with True Voltage Technology™
    CrossLinc® allows for amperage and voltage control at the welding arc to improve control of your operation.
    No need for an additional control cable communication occurs directly over the weld cables.
    True Voltage Technology™ compensates for voltage drop across the welding circuit.
    TVT™ will measure the voltage drop and adjust the power source to compensate for the difference between the desired voltage and actual voltage at the weld.

  • Flextec® 350X Construction Multi-Process Power Source for all Your Welding Needs
    Optimized stick welding for both cellulosic and low hydrogen electrodes.
    Compatible with CrossLinc, 42V analog, and digital feeders for GMAW and FCAW.
    Touch-Start TIG® for reducing contamination during starts without high frequency.

  • Field Proven Ruggedness and Durability
    Engineered for outdoor use and harsh environments.
    IP23 rated for use in outdoor weather conditions.
    Desert Duty rated for operation at temperatures up to 55° C (131° F).
    Trayed and potted PC boards to help withstand welding dust and humidity.
    Smart fans run at variable speeds to keep internal machine components cool.
    Tough alloy handles for lifting and impact protection.
    Lightweight aluminum powder painted case for rust protection.
    Shock Absorbing Rubber Feet for impact protection

    PLEASE NOTE: This is a DC TIG welder ONLY. It CANNOT TIG weld aluminum.

    Comes complete with
  • Flextec® 350X Construction Multi-Process Welder with Tweco®-style receptacles
  • 8.5 ft (2.6m) input power cord
  • LN-25X® w/CrossLinc® and TVT™ (No Flowmeter, Tweco®) K4267-2
  • Magnum® PRO Curve™ HDE™ 250 MIG Welding Gun K4531-2-10-45
  • Drive Roll Kit .040 - .045 in (1.0 - 1.2 mm) Cored Wire KP1697-045C