KP4121-1-50S-B25 - Lincoln Magnum PRO Robotic Nozzle .500 Stick-Out Bottleneck (25 Pack)

Precision Consumables for Automated Welding Systems

The Lincoln Electric KP4121-1-50S-B25 Magnum PRO Bottleneck Gas Nozzle is a specialized consumable engineered to meet the rigorous demands of high-volume robotic welding cells. Designed exclusively for the Magnum PRO Water-Cooled Robotic Torch platform, this nozzle represents the intersection of durability and precision performance. In automated environments where downtime equates to significant revenue loss, the reliability of front-end expendables is paramount. This nozzle features a 0.500-inch (12.7 mm) bore diameter, a standard size for a wide variety of wire diameters and transfer modes, providing a stable column of shielding gas to protect the molten weld pool from atmospheric contamination.

Optimized Geometry for Complex Fixturing

One of the defining characteristics of the KP4121-1-50S is its bottleneck design. Unlike standard straight or tapered nozzles, the bottleneck shape narrows significantly towards the outlet. This profile is critical in robotic applications where the torch arm must navigate complex tooling, clamps, and tight joint angles. The reduced diameter at the tip allows the robot to access deep corners and confined spaces without compromising the gas shield or risking arcing against the fixture. Furthermore, this specific model is a "Stick Out" configuration. This indicates that the nozzle length is calibrated to allow the contact tip to protrude slightly beyond the nozzle face (or sit in a position that facilitates a shorter contact-tip-to-work distance relative to the nozzle edge), which is often required for specific joint tracking requirements or root pass visibility.

Magnum PRO Performance Platform

As part of the Magnum PRO line, these nozzles utilize a robust thread-on connection. This design is superior to slip-on variants in robotic applications, as it ensures the nozzle remains concentric to the contact tip and securely fastened despite the rapid acceleration and deceleration forces typical of robotic arms. The secure seating also maximizes thermal transfer, allowing the water-cooled torch body to effectively pull heat away from the nozzle, thereby extending the service life of the consumable and reducing spatter adhesion. Supplied in a bulk package of 25, this SKU is tailored for industrial facilities requiring consistent inventory for continuous production schedules.