Flextec 350X Construction (Tweco) (K4271-1)

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The Flextec 350X Construction is made for field welding applications. Stick, TIG, wire welding processes with an across-the-arc wire feeders and CrossLinc compatible feeders such as the LN-25X.


  • A Rugged Multi-Process Power Source For Maximum Flexibility
    • Out on the construction jobsite or in most fabrication shops, it pays to keep it simple. The Flextec 350X multi-process welder is designed for that kind of environment. These multi-process welders are easy to setup and easy to operate, yet rugged and flexible enough to be used in construction, fabrication, shipbuilding and other heavy-duty applications.
  • Simple
    • Streamlined operator panel minimizes setup time
    • Plug in to any 380-600V 3 phase power
    • Easy process selection
  • Reliable
    • Built on industry proven design elements of other popular Lincoln Electric welders
    • Components designed to run cool for long life in high temperature environments
    • Fully encapsulated and environmentally protected electronics
    • Engineered for outdoor use and harsh environments (IP23 rated)
  • Flexible
    • Compatible with across-the-arc, analog, digital or CrossLinc feeders
    • Premium multi-process arc characteristics works with all DC wire, stick and TIG processes
    • Choice of models to fit any application and budget
    • Lightweight and portable
  • Product Highlights
    • Desert Duty Rated for extreme temperatures up to 55C
    • VRD Voltage Reduction Device reduces Open Circuit Voltage for added safety
    • Offered in 4 and 6 pack rack configurations
    • Wide 5-425A amperage range
    • Capable of Arc Gouging with 3/16 in. (4.8 mm) carbons
  • CrossLinc Technology
    • Full functionality without control cables
    • Enables remote procedure setting at the feeder to improve weld quality
    • Increase arc time with fewer trips to the power source to adjust settings
    • Improves safety by reducing jobsite clutter

What's Included

  • 8.5 ft (2.6m) input power cord


  • MIG
  • Flux-core
  • Stick
  • TIG

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Extra Information

Lincoln Electric
Input Phase:
Input Voltage:
460/575 V
MIG Welding Thickness Capability (steel):
>1/2 in.