K2622-2 - Lincoln Electric Precision TIG 375 AC/DC TIG/Stick Welder K2622-2

Unmatched Precision and Power for Industrial Fabrication

The Lincoln Electric Precision TIG 375 (K2622-2) is engineered to be the definitive workhorse for professional fabrication environments requiring both finesse and raw power. Designed with the patented Micro-Start II Technology, this machine delivers extremely stable low-amperage starting, welding, and cratering for both AC and DC welding processes. This technology eliminates the erratic arc starts often associated with traditional TIG machines, ensuring that critical welds on expensive alloys are flawless from the very first second of the arc.

With the widest operating range in its class, spanning from a delicate 2 amps up to a massive 420 amps, the Precision TIG 375 is capable of handling everything from thin aerospace alloys to heavy structural castings. The unit boasts the highest duty cycle in its category, rated at 40% at 375 amps, allowing for sustained operation during intensive welding sessions without thermal interruption. This makes it an ideal choice for heavy fabrication, marine repair, and pharmaceutical equipment manufacturing where downtime is not an option.

Advanced Control Systems

The K2622-2 model comes standard with an Advanced Pulse Control panel. This feature allows operators to enable the TIG pulser to significantly minimize material distortion caused by excessive heat input, a critical factor when working with thin stainless steel or aluminum sections. The pulser also assists in moderating filler metal deposition, resulting in a consistent bead appearance that meets high aesthetic standards. Furthermore, the AC Auto Balance system automatically adjusts for the optimal mix of cleaning and penetration when welding aluminum, simplifying setup for operators while still offering full manual control for specific metallurgical requirements.

Robust Design and Usability

Beyond its arc performance, the Precision TIG 375 is built for the shop floor. It features a side-mounted torch holder and connections, which not only protect the torch when not in use but also simplify cable management in tight workspaces. The machine also offers superior Stick welding capabilities, easily running up to 3/16-inch (4.8 mm) electrodes, including cellulosic types like Fleetweld 5P+. This versatility ensures that the Precision TIG 375 serves as a comprehensive solution for maintenance and repair operations.