KP2745-040T-B100 - Lincoln Electric Magnum PRO Contact Tip .040 Tapered 550A (100-Pack)

Optimize Your Arc with Magnum PRO 550A Tapered Contact Tips

For professional welders demanding precision and durability, the Lincoln Electric KP2745-040T-B100 Magnum PRO Contact Tip offers a high-performance solution tailored for heavy-duty MIG applications. Designed to fit the industry-leading Magnum PRO series of semi-automatic and robotic welding guns, these contact tips are engineered to handle amperages up to 550A. This specific model features a .040-inch (1.0 mm) wire diameter compatibility and comes in a tapered geometry, providing the perfect blend of durability and maneuverability for challenging weld joints.

The standout feature of the KP2745 series is the integration of Copper Plus® technology. In the intense heat of the welding arc, standard copper tips can soften, deform, and wear out quickly, leading to micro-arcing and unstable wire feeding. Lincoln's Copper Plus® alloy is formulated to resist this thermal degradation, maintaining its hardness and conductivity over longer periods. This results in a stable arc, consistent penetration, and a reduction in burn-backs. For the welder, this means less frustration with equipment maintenance and more time focused on laying down quality beads.

Thermal management is further enhanced by the physical design of the tip. The Magnum PRO platform utilizes a larger mass than many competitive systems, acting as a heat sink to draw thermal energy away from the front end. Additionally, the interface between the contact tip and the diffuser is critical. These tips employ a flattened thread profile that maximizes the contact surface area. This design ensures efficient transfer of welding current and minimizes electrical resistance heating. It also serves a mechanical function: the anti-seize threads resist melting and fusing, ensuring that when it is finally time to change the tip, it can be removed easily without damaging the diffuser.

The tapered profile of the KP2745-040T is essential for applications requiring tight access. Whether you are welding inside a pipe, a corner joint, or a complex fixture, the tapered shape provides the clearance needed to maintain the correct stick-out and gun angle. This 100-pack bulk configuration is ideal for shops that run high-duty cycles and need to ensure their inventory of critical consumables is always stocked. By choosing genuine Lincoln Electric Magnum PRO consumables, you ensure your equipment operates at peak efficiency with the reliability expected from a world-class welding brand.