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Lincoln Electric Flextec® 500X/ LF-74 Heavy Duty One-Pak® #K3612-2

Name: Flextec® 500X/ LF-74 Heavy Duty Multi-Process Welder (380-575V 3PH) One-Pak® #K3612-2
Brand: Lincoln Electric
SKU: LINK3612-2

Part Number: K3612-2

UPC: 015082862880

$10,750.00 + Free Shipping

Features
Specs
Documents
Consumables
FAQS

Advanced Multi-Process Welding System

The Flextec® 500X/ LF-74 Heavy Duty One-Pak® (K3612-2) is a comprehensive welding solution that combines the powerful Flextec® 500X multi-process welder with the LF-74 wire feeder. This system delivers up to 500 amps of welding power using inverter technology, designed for heavy-duty applications in shipyards, construction sites, and fabrication shops.

Highlights

Multi-Process Capability: Supports MIG, Flux-Cored, Stick, and TIG welding
CrossLinc® Technology: Enables remote control without extra cables
Rugged Design: IP23 rated for outdoor use, Desert Duty® rated for extreme environments
Basic Pulse MIG: Includes weld modes for carbon steel, stainless steel, aluminum, and metalcore
Versatile Compatibility: Works with 42VAC wire feeders for MIG and Flux-Cored welding

What's Included

Flextec® 500X Multi-Process Welder (K3607-1)
LF-74 Wire Feeder, Bench Model, Heavy Duty (K2426-5)
Magnum® PRO Curve™ 400 Welding Gun (K2952-2-10-45)
Work Lead, Control Cable Extension, Drive Roll Kit, Weld Power Cable
Model 355-2Ar-58010 Flowmeter Regulator Shielding Gas Kit

Industries Served

Shipbuilding
Construction
Heavy Fabrication
General Manufacturing

Key Features

Simple Interface: Easy setup and operation
Reliable Performance: Durable construction for harsh environments
Flexible Operation: Compatible with various wire feeders and processes
ArcLink® Enabled: Provides synergic pulse modes
Optimized Welding: For both cellulosic and low hydrogen electrodes in stick welding

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 (844) 682-0205 for assistance.

Other Models:

Specifications - Flextec® 500X/ LF-74 Heavy Duty One-Pak® #K3608-3
Brand	Lincoln Electric
Model	Flextec® 500X/ LF-74 Heavy Duty One-Pak®
SKU	K3612-2
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	500A
Output Range by Mode	5-500A
Machines Communication Technology	analog digital CrossLinc ArcLink
Wire Feeder Supply Voltage	42VAC
Amphenol Pins (type of connector)	5 14 12
Work Lead Connector Type	Lug

Wire and TIG Feeders
Number of driven rolls	4 rolls
Feeder type	Bench
Configuration	Single
Max spool diameter	60lb
Communication Technology	analog
UI type	Simple
Max Rated Output Capable	500A
Max Wire Diameter (Solid)	1/16 in (1.6 mm)
Max Wire Diameter (Cored)	5/64 in (2 mm)
Max WFS	800IPM
Feedhead Configuration	Single
Power Source to Feeder Communication Connector Type	14-pin
Accesories Communication Connector Type	none
Gun Bushing	Tweco #2-#4
Max Spool Size (lbs)	60
Wire Feeders Processes	MIG

Basic Specification
Input Voltage	460,380/400/415,575
Input Current	39/31/31,33/27/27
Input Power	380/460/575/3/50/60
Input Phase	3
Rated Output	500A/40V/60%,450A/38V/100%