KP2745-116 - Lincoln Magnum PRO Copper Plus Contact Tip 1/16" (550A) - 10 Pack

Technical Overview of Lincoln KP2745-116

The Lincoln Electric KP2745-116 is a high-performance contact tip engineered for the Magnum® PRO series of MIG welding guns. Designed specifically for heavy-industrial applications utilizing 1/16-inch (1.6 mm) welding wire, this consumable is rated for amperages up to 550A. The defining characteristic of this component is the proprietary Copper Plus® technology. By increasing the overall diameter of the tip, Lincoln Electric has effectively increased the copper mass available for thermal management. This additional mass acts as a superior heat sink, drawing thermal energy away from the wire-tip interface more efficiently than standard diameter tips. This thermal regulation is critical in high-amperage procedures where resistive heating can rapidly degrade tip integrity and conductivity.

In addition to thermal management, the KP2745-116 addresses common mechanical failure modes through its Anti-Seize™ threading. Standard contact tips often suffer from thermal expansion that locks them into the gas diffuser, requiring pliers or excessive force to remove, which can damage the gun's front-end assembly. The Magnum PRO tips utilize a flattened thread profile that accommodates thermal expansion without binding. This design ensures that the tip remains secure during operation but can be easily removed by hand or with minimal torque after cooling, preserving the threads of the diffuser and reducing maintenance downtime.

This contact tip is strictly compatible with Lincoln Electric's Magnum PRO platform, including the 450 and 550 amperage class guns. It is not backward compatible with legacy Magnum or Tweco-style back ends without the appropriate Magnum PRO front-end conversion. The precise bore tolerance ensures consistent electrical contact with the welding wire, promoting stable arc transfer and reducing micro-arcing within the tip, which is a primary cause of premature failure. Supplied in a pack of 10, these tips represent a critical component for maintaining the duty cycle and reliability of automated or manual high-output welding stations.