KP2745-045-B100 - Lincoln Electric KP2745-045-B100 Copper Plus Contact Tip 550A .045" (100-Pack)

Maximize Your Welding Uptime with Copper Plus

Welders know that the contact tip is the critical transfer point for welding current, and its failure can ruin a weld or halt production. The Lincoln Electric KP2745-045-B100 Copper Plus Contact Tip (100-Pack) is built to keep you welding longer with fewer interruptions. Designed for use with Lincoln's rugged Magnum PRO MIG guns, these tips are sized for .045-inch (1.2 mm) wire and are rated for heavy-duty 550A welding. Whether you are running long structural beads or working in a high-production manufacturing cell, these tips deliver the reliability professional welders demand. The 100-pack bulk quantity ensures your shop is always stocked, offering excellent value per unit compared to smaller packages.

Superior Heat Dissipation

Heat is the enemy of contact tips. As tips get hot, the copper softens, the bore wears out (keyholing), and the arc becomes unstable. Lincoln's Copper Plus design combats this by using more copper in the tip's construction. The larger diameter acts as a heat sink, pulling thermal energy away from the wire interface and dissipating it into the shielding gas stream. This keeps the tip cooler for longer periods, maintaining a crisp, stable arc and reducing the frequency of micro-arcing inside the bore. The result is a tip that lasts significantly longer than standard competitors, saving you money and time.

No More Seized Tips

There are few things more frustrating than a contact tip that has welded itself to the diffuser. Trying to wrench it off can damage the diffuser or the gun neck. Lincoln Electric solved this problem with their innovative Anti-Seize thread technology. The threads on the KP2745-045-B100 are designed with a unique profile that accommodates thermal expansion. Even after hours of welding at 550 amps, the tip will unscrew smoothly. This feature protects your investment in Magnum PRO guns and ensures that consumable changeovers are quick and hassle-free.

Consistent Performance

Consistency is key to quality welding. These contact tips are manufactured to tight tolerances to ensure smooth wire feeding and positive electrical contact. The .045-inch bore is precision-drilled to prevent drag while ensuring optimal current transfer. By choosing genuine Lincoln Electric parts, you are ensuring that your Magnum PRO gun operates at peak efficiency, delivering the smooth, spatter-free welds that the system is known for.