The model K5255-1 is not able to be used with argon. This is flux core only.
Lincoln Electric WELD-PAK® 90i FC Flux Core Welder – 120V Inverter Wire Feed Welder, 120 Amp Output, Gasless MIG Welding Machine, Portable Lightweight Design for DIY, Home Repair & Steel Fabrication, Model # K5255-1
This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.
Click or Tap image to Zoom
$349.99
- Weld Anywhere with 120V Power: Plug into any standard 120V outlet and start welding immediately—no special wiring required. This makes the WELD-PAK® 90i FC perfect for home garages, workshops, maintenance jobs, and on-the-go repairs where portability and flexibility are essential.
- Powerful Flux-Core Welding Performance: Delivering up to 120 amps of output, this welder handles steel projects with ease, welding material up to 1/4 inch thick. Designed exclusively for flux-core wire (up to .035 in.), it provides strong penetration and reliable results without the need for gas.
- User-Friendly Controls for Quick Setup: The simple two-knob interface lets you easily adjust wire feed speed and voltage, while infinite voltage control allows fine-tuning for optimal weld quality. Ideal for beginners and hobbyists who want fast setup without sacrificing control.
- Lightweight, Compact & Highly Portable: Weighing just 15 lbs. with a compact inverter design and included shoulder strap, this welder is easy to carry between job sites or store in tight workshop spaces—perfect for mobile welders and maintenance professionals.
- Complete Ready-to-Weld Kit: Comes equipped with everything you need to get started: a 6 ft. weld gun, .030 and .035 contact tips, gasless nozzle, drive roll for flux-core wire, ground clamp with 6 ft. cable, and instruction manual—just add wire and start welding.
Prop 65 Warning: See Details
See full description
What's Included
- (1) WELD-PAK 90i FC welding machine (1) Gun with 6ft. cable (1) .030 contact tip (1) .035 contact tip (1) Gasless nozzle (1) Drive roll for flux-cored welding (1) Ground clamp with 6ft. cable (1) Instruction manual
Features + Benefits
- Weld Anywhere with 120V Power: Plug into any standard 120V outlet and start welding immediately—no special wiring required. This makes the WELD-PAK® 90i FC perfect for home garages, workshops, maintenance jobs, and on-the-go repairs where portability and flexibility are essential.
- Powerful Flux-Core Welding Performance: Delivering up to 120 amps of output, this welder handles steel projects with ease, welding material up to 1/4 inch thick. Designed exclusively for flux-core wire (up to .035 in.), it provides strong penetration and reliable results without the need for gas.
- User-Friendly Controls for Quick Setup: The simple two-knob interface lets you easily adjust wire feed speed and voltage, while infinite voltage control allows fine-tuning for optimal weld quality. Ideal for beginners and hobbyists who want fast setup without sacrificing control.
- Lightweight, Compact & Highly Portable: Weighing just 15 lbs. with a compact inverter design and included shoulder strap, this welder is easy to carry between job sites or store in tight workshop spaces—perfect for mobile welders and maintenance professionals.
- Complete Ready-to-Weld Kit: Comes equipped with everything you need to get started: a 6 ft. weld gun, .030 and .035 contact tips, gasless nozzle, drive roll for flux-core wire, ground clamp with 6 ft. cable, and instruction manual—just add wire and start welding.
- Durable Construction for Jobsite Reliability: A rugged metal housing protects internal components from damage and environmental exposure, ensuring longevity whether you're working in the shop or on construction sites.
- Smooth, Efficient Inverter Technology: Advanced inverter power source provides smoother arc performance, increased efficiency, and better weld consistency compared to traditional transformer welders—helping you achieve cleaner, more professional results.
- Ideal for DIY, Repairs & Light Fabrication: Perfect for home projects, hobby welding, automotive repair, farm maintenance, and light fabrication—this versatile welder is built to handle everyday welding needs with ease and reliability.
See All MIG + Flux Core Welders
See All Lincoln Electric MIG + Flux Core Welders
Currently Viewing This Product
Specifications
Specifications
Lincoln Electric 120V, 120 Amp, Inverter Flux Core Welder, Model# K5255-1
Lincoln Electric, WELD-PAK 180I WELDER W/ SPOOL, Max. Amps 180 Mig Ready, Model# K5387-6
ESAB Rebel EM 285ic, 460V/575V Inverter MIG Welder/Multiprocess Welder, Flux Core Welder, Stick Welder, TIG Welder, 3 Phase, Model# 0558102556
Volts
Same
120
120/230
460-575
Max. Amps
Same
120
180
300
Power Type
Same
DC
DC
DC
Multi-process
Same
No
Yes
Yes
Spool Gun Included
Same
No
Yes
No
Welding Processes
Same
Flux-Core Only
Flux-Core, MIG, Stick, TIG
Flux-Core, MIG, Stick, TIG
Max. Weld Thickness
Same
0.25 in
0.375 in
0.5 in
Max. Welding Wire Diameter
Same
0.035 in
0.035 in
0.063 in
Duty Cycle
Same
30%
Mig: 30% At 165a, Tig: 30% At 165a, Stick: 25% At 160a
MIG: 285 A / 28 V @ 50% Duty Cycle | 265 A / 27 V @ 60% Duty Cycle | 200 A / 24 V @ 100% Duty Cycle | STICK: 285 A / 31 V @ 50% Duty Cycle | 180 A / 27 V @ 100% Duty Cycle | 255 A / 30 V @ 60% Duty Cycle | TIG: 285 A / 21 V
Weldable Materials
Same
Steel
Steel, Stainless Steel, Aluminum
Mild Steel, Steel, Aluminum
Min. Amps
Same
20
10
5
Wire Feed Speed Control
Same
Yes
Yes
Yes
Cart Included
Same
No
No
No
Mig Ready
Same
No
Yes
Yes
Power Cord Length
Same
6 ft
10 ft
10 ft
Clamp Cable Length
Same
6 ft
10 ft
6.5 ft
Electrode Cable Length
Same
6 ft
10 ft
13 ft
Regulator and Gas Hose Included
Same
No
Yes
Yes
Shielding Gas Required
Same
No
No
Yes
Product Weight
Same
15.0000 lb
15.6000 lb
70.0000 lb
Dimensions L x W x H (in.)
Same
8.9 x 18.1 x 13.6 in
13.6 x 8.9 x 18.1 in
26.5 x 19.5 x 11.5 in
See All MIG + Flux Core Welders
See All Lincoln Electric MIG + Flux Core Welders
Recently Viewed Items
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.