The Lincoln Electric KP2745-364A is a premium contact tip engineered specifically for the demands of high-amperage aluminum MIG welding. Part of the renowned Magnum® PRO consumable line, this tip is designed to address the unique thermal and electrical challenges associated with feeding aluminum wire. The tip features a 3/64-inch (1.2 mm) bore diameter and is rated for operation up to 550 Amps, making it suitable for heavy industrial fabrication and continuous duty cycles.
At the core of the KP2745-364A is Lincoln's proprietary Copper Plus™ technology. Unlike standard copper tips that can soften and deform under the intense heat of high-current aluminum welding, Copper Plus™ utilizes a specialized alloy composition that maintains structural integrity at elevated temperatures. This material science innovation is coupled with a physical design that boasts a larger mass than standard tips. The increased mass acts as a more effective heat sink, rapidly dispersing arc heat away from the bore and the wire interface. This thermal management is critical for aluminum welding, where wire expansion and micro-arcing inside the tip can lead to premature failure and burnback.
One of the most persistent issues in industrial MIG welding is the seizing of contact tips within the gas diffuser, often caused by thermal cycling and spatter accumulation. The KP2745-364A addresses this with Lincoln's patented Anti-Seize™ thread technology. The threads are engineered with a flattened profile that not only increases the surface area for electrical transfer and heat conduction but also prevents the cross-threading and fusing that commonly lock tips in place. This ensures that tip changes are quick, consistent, and tool-free, minimizing downtime in production environments.
These contact tips are an integral component of the Magnum® PRO system, designed to work in harmony with Lincoln's diffusers and nozzles to provide a stable, focused arc. The precise manufacturing tolerances of the bore ensure consistent electrical contact with the aluminum wire, reducing micro-arcing and promoting smooth wire feeding—a critical factor when pushing soft aluminum filler metals.
| Additional Information |
|---|
| Brand:Lincoln Electric |
| Item:Contact Tip |
| Wire Size:3/64" |
| Wire Type:Aluminum |
| Packaging Description:10 in a pack |
| Amperage:550amp |
| Fits Which Model:Lincoln LF-72, LN-25, Power MIG Series |
| Material:Copper Plus Alloy |
| Compatible Series:Magnum® PRO |
| Thread Type:Anti-Seize™ |
| Process:MIG (GMAW) |
