CK1903-2P - Lincoln Precision TIG 375 Water-Cooled One-Pak 575V

Technical Specifications and Performance

The Lincoln Electric Precision TIG 375 (Model K2622-2) included in this One-Pak is a square wave TIG machine designed for critical welding applications requiring precise control over arc characteristics. With an output range of 2 to 420 Amps, this machine provides the widest operating range in its class, allowing for the welding of materials ranging from thin sheet metal to heavy plate. The unit boasts a 40% duty cycle at 375 Amps, ensuring it can withstand the rigors of heavy fabrication environments. This specific model is hardwired for 575V input, catering specifically to industrial power grids that demand high-efficiency 3-phase power utilization.

Technologically, the Precision TIG 375 is equipped with AC Auto-Balance, a feature that automatically adjusts the ratio of cleaning action (electrode positive) to penetration (electrode negative) based on the amperage setting. This simplifies the setup process for aluminum welding, ensuring optimal oxide removal without overheating the tungsten. For advanced users, the machine also offers manual balance control, allowing for fine-tuning of the arc to suit specific alloy compositions. The Micro-Start II technology minimizes high-frequency interference and provides a focused, stable arc at amperages as low as 2 amps, which is critical for crater filling and edge welding.

The One-Pak configuration (CK1903-2P) is comprehensive. It includes the K1828-1 Under-Cooler Cart, which features a low center of gravity for stability when moving the 500+ lb setup. The cooling system is driven by a reliable Cool-Arc unit plumbed to the K1784-4 PTW-20 torch. The PTW-20 is a rugged, water-cooled torch capable of handling the machine's full output, featuring a comfortable grip and durable cable assembly. Also included is the K870 Foot Amptrol for remote current control, a K2150-1 work clamp assembly, and a 301-style gas regulator with hose. The machine also supports Stick welding with excellent arc force control, making it a versatile multiprocess station for maintenance and repair operations.