KP2745-364AT5356 - Lincoln Magnum PRO 550A Aluminum Contact Tip 3/64 Tapered (10-Pack)

High-Performance Aluminum Welding Consumables

The Lincoln Electric KP2745-364AT5356 Magnum® PRO Copper Plus® Contact Tip is a premium consumable engineered specifically for high-amperage industrial aluminum welding. Designed to operate at currents up to 550A, this contact tip features a 3/64-inch (1.2 mm) bore optimized for 5356 aluminum alloy wire. Aluminum welding presents unique challenges, particularly regarding thermal expansion and wire feedability; standard tips often cause micro-arcing or burnback when the wire expands inside the bore. This specific SKU addresses those issues with precision tolerances that accommodate the expansion characteristics of 5356 alloy, ensuring consistent electrical contact and smooth feeding.

Copper Plus® Technology

At the core of this product is Lincoln's proprietary Copper Plus® technology. These contact tips are manufactured with a larger diameter and greater mass than standard industry tips. This increased mass acts as a superior heat sink, effectively drawing thermal energy away from the wire-tip interface. By maintaining lower operating temperatures, the tip resists softening and deformation, which are common causes of keyholing and premature failure. The result is a consumable that lasts significantly longer, reducing downtime for tip changes and lowering overall operational costs in high-volume production environments.

Tapered Design for Precision

The tapered geometry of the KP2745-364AT5356 provides distinct advantages for operators working on complex assemblies. The narrowed profile at the end of the tip allows for better access into tight corners and V-grooves, while simultaneously offering the welder an unobstructed view of the arc and weld puddle. This visibility is critical for maintaining puddle control in aluminum welding, where travel speeds are often faster and the weld pool is more fluid. Combined with the robust Magnum® PRO platform, these tips utilize coarse threads to prevent cross-threading and seizing, ensuring that maintenance is quick and hassle-free.