K225 - Lincoln Electric Large Wire Twinarc Nozzle Kit for Submerged Arc Welding

Maximize Submerged Arc Productivity with the Lincoln K225 Twinarc Kit

The Lincoln Electric K225 Large Wire Twinarc Nozzle Kit is a specialized accessory designed to significantly enhance deposition rates and welding speeds in heavy industrial applications. Engineered for use with the renowned Lincoln NA-3S, NA-4, and NA-5 automatic wire feeders, this kit enables the Twinarc® submerged arc welding process using larger diameter wires. By feeding two electrode wires simultaneously into a single weld pool, operators can achieve "Fast-Fill" joints and high-speed hardfacing beads that single-wire setups simply cannot match. This assembly is specifically configured to handle wire diameters of 5/64 inch (2.0 mm), 3/32 inch (2.4 mm), and 1/8 inch (3.2 mm), making it an ideal solution for heavy fabrication environments where throughput is critical.

The K225 kit is comprehensive, providing all the essential hardware required to convert or equip your compatible wire feeder for dual-wire operation. The package includes a robust wire reel and an insulated reel mounting bracket to manage the additional wire supply. To ensure smooth feeding, the kit features precision-engineered drive rolls, a drive roll locating collar, and an idle roll assembly. A wire straightener is included to correct wire cast before it enters the nozzle, ensuring accurate placement in the joint. The core of the system is the dual wire guide and the specialized contact nozzle assembly. This nozzle utilizes two spring-loaded jaws that maintain constant, firm pressure on the wires. This design guarantees consistent electrical contact and stable electrical stick-out, which are vital for maintaining arc stability and uniform weld quality over long production runs.

Implementing the Large Wire Twinarc system requires a wire feeder equipped with a 142:1 gear ratio to handle the torque and speed requirements of feeding two large wires. The process is particularly effective for applications requiring high metal deposition, such as structural steel fabrication, pipe mills, and heavy equipment manufacturing. By utilizing the K225, fabricators can leverage the efficiency of the Twinarc process to reduce arc time and improve overall project timelines without sacrificing weld integrity. The kit's components are built to Lincoln Electric's high standards of durability, ensuring reliable performance even in harsh industrial environments.