135430 - Miller .035 Aluminum Contact Tip for Spoolmatic 30A (10-Pack)

Precision Contact Tips for Aluminum Welding Systems

The Miller 135430 Contact Tip is a specialized consumable engineered to optimize the performance of Miller's push-pull and spool gun systems. Designed specifically for use with .035-inch (0.9 mm) welding wire, this tip features a slightly oversized .052-inch bore. This critical design specification accommodates the higher thermal expansion rate of aluminum wire compared to steel, ensuring smooth wire feeding and reducing the risk of micro-arcing or wire seizing within the tip. The tip measures 1.437 inches in length and utilizes a non-threaded, slip-fit connection mechanism, allowing for rapid changeovers during high-volume fabrication.

Manufactured from high-grade copper, these tips provide excellent electrical conductivity and thermal transfer, essential for maintaining a stable arc in aluminum MIG welding. The 135430 is the standard replacement tip for older Miller Spoolmatic 15A and 30A spool guns, as well as XR-Edge, XR-M, and compatible PowCon MIG guns. It is distinct from the threaded FasTip series; users should verify their gun's diffuser type before ordering. By maintaining the correct clearance between the wire and the tip wall, these consumables help mitigate common aluminum feeding issues such as bird-nesting and irregular arc starts.

Regular replacement of contact tips is vital for maintaining weld quality, particularly in aluminum applications where oxide accumulation and tip wear can rapidly degrade performance. This package contains 10 genuine Miller contact tips, ensuring operators have sufficient stock for continuous production. Whether used in marine fabrication, trailer manufacturing, or general aluminum repair, the 135430 tip delivers the reliability expected from genuine Miller components.