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Lincoln Electric Flextec® 350X Multi-Process Construction Welder w/ LN-25X® Wire Feeder One Pak® #K4278-3

Part Number: K4278-3
UPC: 015082982922
$9,768.75 + Free Shipping $11,184.00*
SAVE $1,415.25

WARNING: Cancer & Reproductive Harm www.P65Warnings.ca.gov

Welding type:

MIG

MIG

TIG

TIG

Stick

Stick

Power supply:

220V 3 Phase

220V 3 Phase

460V

460V

Material type:

Mild Steel

Mild Steel

Stainless Steel

Stainless Steel

Aluminum

Aluminum

Lincoln Electric Flextec® 350X Multi-Process Welding Machine with LN-25X® Wire Feeder #K4278-3

Multi-Process Welding Package for Construction Applications

The Lincoln Electric Flextec® 350X Construction / LN-25X® One Pak® (K4278-3) combines a Flextec 350X multi-process welding power source with an LN-25X portable wire feeder, featuring CrossLinc technology for remote operation in construction welding applications.

Lincoln Electric warranty

What's Included

  • Flextec® 350X Construction (Tweco®) | K4271-2
  • LN-25X® w/CrossLinc® and TVT (No Flowmeter, Tweco®) | K4267-2
  • Magnum® PRO Curve™ HDE™ 250 Welding Gun | K4531-2-10-45
  • Weld Cable Package - Work & Power Lead 2/0 - 10 ft (3 m) | K1803-2
  • 8.5 ft (2.6m) input power cord

Highlights

  • CrossLinc Technology: Allows remote voltage control from the wire feeder without additional control cables
  • Rugged Design: IP23 rated for harsh environments with trayed and potted PC boards
  • Versatile: Supports multiple welding processes including MIG, Flux-Cored, Stick, TIG, and Gouging
  • True Voltage Technology (TVT): Compensates for voltage loss in the system
  • Easy Ordering: Single part number for the complete package

Industries Served

  • Construction
  • Cross Country Pipeline
  • General Fabrication
  • Heavy Equipment
  • Maintenance & Repair
  • Offshore
  • Structural Welding

Key Features

  • Multi-Process Capability: Supports Stick, TIG, MIG, Flux-Cored, and Gouging
  • Wide Output Range: 5-425A for various applications
  • Portable Design: Ideal for field welding and construction sites
  • Durable Wire Feeder: LN-25X designed for harsh environments
  • High-Quality Gun: Magnum PRO Curve HDE for improved ergonomics and durability

Benefits of the Flextec® 350X Construction / LN-25X® One Pak®

  • Improved Productivity: CrossLinc technology allows remote control without extra cables
  • Versatility: Suitable for multiple welding processes and applications
  • Durability: Designed to withstand harsh construction environments
  • Ease of Use: Simple setup and operation with integrated package
  • Consistent Weld Quality: TVT ensures accurate voltage at the arc

This One Pak® system offers a comprehensive solution for construction welding applications, combining power, portability, and advanced technology in a single package.


Fast, Free Shipping & Easy Returns

At Welders Supply, we prioritize fast, reliable shipping and hassle-free returns. If you’re not fully satisfied with your purchase, you can return it within 14 days for an exchange, credit or refund. Please ensure all products are returned freight paid, in their original packaging, with all materials, manuals and accessories included. A restocking fee of up to 25% may apply based on product condition. Certain restrictions apply to custom orders, PPE and demo items. Call our customer service team at 1-844-682-0205 for assistance.

Shop all multi-process welders and Lincoln Electric welding supplies at the best prices online, from Welders Supply.
Specifications - Lincoln Electric Flextec® 350X Multi-Process Construction Welder / LN-25X® One Pak® #K4278-3
Machines 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)
Max Rating 425A, 45V
Output Range by Mode 5A to 425A
10V to 45V
Rated Gouging Carbon Diameter 1/4 in (6.5 mm)
Data Technologies USB
Machines Communication Technology analog
digital
CrossLinc
ArcLink
Wire Feeder Supply Voltage 40VDC
Amphenol Pins (type of connector) 5
Work Lead Connector Type Tweco
Number of driven rolls 2 rolls
Feeder type Portable
Configuration Single
Max spool diameter 300mm
Communication Technology CrossLinc
UI type Meters
Max Wire Diameter (Solid) 1/16 in (1.6 mm)
Max Wire Diameter (Cored) 3/32 in (2.4 mm)
Max WFS 800IPM
Feedhead Configuration Single
Wire Configuration Single
Power Source to Feeder Communication Connector Type none
Accesories Communication Connector Type none
Gun Bushing Tweco #2-#4
MIG-WireFeeders Yes
Wire Feeders Processes MIG
Flux Cored
Input Voltage 380-575/3/50/60
Input Current 18/17/17, 26/23/18
Input Power 380/460/575/3/50/60
Output Range 5-425A
Rated Output 350A/34V/60%,300A/32V/100%
Typical Application Construction
Cross Country Pipeline
Construction & Field Erection
General Fabrication
Heavy Equipment
Heavy Fabrication
Maintenance & Repair
Offshore
Pipeline & Offshore
Power Generation
Shipbuilding
Structural Fabrication
Structural Welding
Warranty 3 Years

SHIPPING DIMENSIONS

Height: 1.00 Inches
Width: 1.00 Inches
Length: 1.00 Inches
Weight: 179 Lb(s) 6 Oz

Product Questions and Answers

Have a question about this product? Submit your question using the form below

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