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Lincoln Electric SP 140T MIG Welder Factory Demo Welding Machine - U2688-3

SKU: U2688-3
$545.00
Full New Factory Warranty Same warranty as a brand-new unit — backed by Lincoln Electric.
Financing / Leasing Available

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The Lincoln SP 140T - U2688-3 is a professional-grade MIG welder delivering 140 amps of output power. Ideal for home projects, farm repair, and autobody work, this compact machine features superior arc performance, precise wire drive, and minimal spatter for consistent, high-quality welds.
Input Power: 120V (Standard Outlet)
Overview

Lincoln Electric SP 140T MIG Welder Factory Demo Welding Machine - U2688-3 is built for production MIG and Flux-Cored welding. Output ranges from 30-140A DC with a 20% @ 90A duty cycle. Runs on 120V (1) and feeds 0.025 - 0.045 in wire. Ready for Flux-Cored (FCAW), MIG (GMAW).

Specifications
Model SP 140T MIG Welder Welding Machine
Manufacturer Code K5261-1
Output Amperage Range 30-140A DC
Duty Cycle 20% @ 90A
Input Voltage 120V
Phase 1
Wire Diameter Range 0.025 - 0.045 in
Welding Processes Flux-Cored (FCAW), MIG (GMAW)
Weight 49.5 lbs
Downloads & Documentation
Spec Sheet (PDF) Owner's Manual (PDF)
Recommended Applications
  • Production MIG welding — built for high-output continuous MIG work on mild steel and stainless
  • Fabrication shops — runs flux-cored self-shielded wire for outdoor and dirty-metal applications
  • Light-to-medium structural — handles 3/16" to 1/4" base metal with appropriate wire selection
Frequently Asked Questions
What welding processes does the SP 140T MIG Welder Welding Machine support?

It supports Flux-Cored (FCAW), MIG (GMAW).

What's the duty cycle on the SP 140T MIG Welder Welding Machine?

20% @ 90A. This means continuous welding at that amperage for the listed percentage of a 10-minute cycle before requiring cool-down.

What input voltage does it require?

120V on 1 power.

What wire diameters can it feed?

0.025 - 0.045 in — covers standard MIG wire sizes from sheet metal through medium structural work.

Does this come with a warranty?

All new Lincoln Electric welders ship with the standard Lincoln 3-year warranty (parts and labor) on the power source. Consumables and contact tips are wear items not covered by warranty. Factory-demo units carry the Lincoln demo warranty — contact us for current terms.

Specifications

Machine Inputs & Outputs

  • Phase 1: Input Voltage #1 (Voltage/Phase/Hertz): 120/1/60
  • Phase 1: Rated Output #1A (Current/Voltage/Duty Cycle): 90A/19.5V/20%
  • Phase 1: Input Current at Max Rated Ouput #1 (Current): 20A

Product Weights & Dimensions

  • Dimensions (H x W x D): 13.65 in x 10.38 in x 17.9 in (347 mm x 264 mm x 455 mm)
  • Net Weight: 49.5 lbs (22.5 kg)

General Specification

  • Weld Thickness Max: 5/16"
  • Max Amperage: 100-200 Amps
  • Input Power: 115V
  • Machines Processes: Flux-Cored (FCAW), MIG (GMAW)
  • Input Voltage: 120
  • Input Hertz: 60
  • Input Phase: 1
  • Input Power: 120/1/60
  • Mode Icon: CV
  • Output Range: 30-140A DC
  • Polarity: DC

Wire Feeding Specifications

  • Wire Feed Speed Range (IPM): 50-700
  • Wire Feeders Processes: MIG, Flux Cored

Application

  • Typical Application: Automotive, Brewery, Distillery, General Fabrication, Maintenance & Repair, Repair Welding

Warranty

  • Warranty: 3 Years

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