K4498-1 - Lincoln Power MIG 140 MP 120V Multi-Process Welder

Technical Overview

The Lincoln Electric Power MIG 140 MP (K4498-1) is a compact, single-phase multi-process welding machine designed for maintenance, repair, and light fabrication applications. Engineered for versatility, this unit supports MIG (GMAW), Flux-Cored (FCAW), Stick (SMAW), and DC TIG (GTAW) welding processes. It operates on standard 120V input power, making it suitable for environments where higher voltage industrial power is unavailable. The machine features a rated output of 95 Amps at 18.75 Volts with a 60% duty cycle, ensuring consistent performance for light-duty cycles.

Process Capabilities and Output

The Power MIG 140 MP offers distinct amperage ranges for each welding process to optimize arc stability and penetration. For MIG welding, the output ranges from 30 to 140 Amps, accommodating mild steel, stainless steel, and aluminum (with optional spool gun). The DC TIG mode provides an output range of 10 to 120 Amps, suitable for precise work on steel and stainless steel (note: AC TIG for aluminum is not supported). The Stick welding function offers a range of 25 to 90 Amps, allowing for the use of standard electrodes for field repairs. The wire feed mechanism supports wire diameters from .025 to .035 inches.

Physical Specifications and Control

Weighing only 34.5 lbs (15.6 kg), the K4498-1 is designed for high portability. The unit measures 13.6 inches in height, 8.9 inches in width, and 18.1 inches in length. The control interface is simplified with a two-knob system for voltage and wire feed speed/amperage adjustment, alongside a push-button process selector. The machine includes a built-in gas solenoid and connection for shielding gas, as well as a dedicated circuitry for the optional Magnum PRO 100SG spool gun. The robust drive roll system ensures consistent wire feeding for both solid and flux-cored wires.