K5126-1 - Lincoln Electric Square Wave TIG 200 AC/DC Welder K5126-1

Professional AC/DC TIG Welding in a Portable Package

The Lincoln Electric Square Wave TIG 200 (K5126-1) is a versatile powerhouse designed to bridge the gap between hobbyist simplicity and professional functionality. Engineered for craftsmen, small fabricators, and makers, this machine offers a comprehensive solution for TIG and Stick welding applications. At its core, the Square Wave TIG 200 utilizes advanced inverter technology to provide smooth, stable AC TIG welding on aluminum and DC TIG welding on steel, stainless steel, and chrome-moly.

One of the standout features of this unit is its Dual Voltage capability. Operators can plug into a standard 120V household circuit for lighter projects or switch to 230V for maximum output up to 200 Amps. This flexibility ensures that you can take the machine exactly where the work is needed, whether it is in a dedicated workshop or a garage environment. Weighing in at only 46 lbs (21 kg), portability is a key advantage, allowing for easy transport to various job sites.

Advanced Aluminum Controls

Welding aluminum requires precise control over the arc, and the Square Wave TIG 200 delivers with professional-grade settings usually found on more expensive industrial machines. The AC Frequency Control allows users to adjust the width of the arc cone—higher frequencies create a focused, narrow arc for tight corners and thin materials, while lower frequencies widen the bead. Additionally, the AC Balance setting lets the welder fine-tune the cleaning action (removing aluminum oxide) versus penetration, ensuring high-quality welds on both dirty and clean materials.

Pulse Technology and Stick Capability

For those looking to improve their TIG consistency, the built-in Pulse feature provides a rhythmic drumbeat to the arc, aiding in filler metal deposition and reducing heat input to prevent burn-through on thin metals. Beyond TIG, this machine is a capable Stick welder, perfect for outdoor repairs or working on thicker, rusty materials where TIG might not be practical. The K5126-1 comes as a complete Ready-Pak, including a PTA-17 torch, foot pedal, gas regulator, and all necessary cables to get you welding immediately.