12601130 - Tweco 26I75 Standard MIG Nozzle 3/4 Inch Bore (2-Pack)

Technical Overview of the Tweco 1260-1130 (26I75) Nozzle

The Tweco 1260-1130, also designated as the 26I75, is a standard-geometry gas nozzle engineered for heavy-duty industrial MIG (GMAW) and Gas-Shielded Flux Cored (FCAW-G) welding applications. This component is part of the widely utilized Tweco 26 Series consumable line, specifically designed to interface with high-amperage MIG guns such as the Tweco Professional No. 5 and No. 6 models, as well as the Spray Master 450 series. The nozzle features a substantial bore diameter of 0.750 inches (19.1 mm), which is critical for maintaining laminar gas flow and adequate shielding coverage over large weld pools typically associated with high-deposition welding parameters.

Structurally, the nozzle is fabricated from a robust copper alloy that offers exceptional thermal conductivity. This material property is essential for the rapid dissipation of radiant heat absorbed from the arc, thereby reducing the operating temperature of the front-end consumables and minimizing the adherence of weld spatter. The "I" in the 26I75 model number denotes its self-insulated classification. It incorporates a built-in electrical insulation layer that isolates the outer nozzle shell from the electrically live contact tip and diffuser assembly. This insulation is vital for preventing inadvertent arc strikes should the nozzle come into contact with the grounded workpiece, a common hazard in tight-access welding scenarios.

The nozzle utilizes a slip-on or coarse thread interface (depending on the specific gas diffuser adapter used in the assembly) to ensure a secure mechanical connection while allowing for relatively easy removal for cleaning or replacement. The 2-piece design philosophy of the 26 Series allows for cost-effective maintenance of the gun's front end. This specific SKU is supplied as a package of two nozzles, ensuring that operators have immediate replacement stock available to minimize downtime in production environments.