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The ITW Miller / Bernard 43115X is an industrial-grade, polymer-constructed internal MIG wire feed conduit liner designed for feeding soft aluminum and specialized wires. It serves as a low-friction pathway inside 15-foot MIG guns to prevent bird-nesting, wire shaving, and erratic arc performance in Gas Metal Arc Welding (GMAW) applications.
Features
Nylon/PTFE Composite: Combines structural rigidity with surface slickness to reduce friction for soft aluminum wire
Anti-Shaving Architecture: Smooth-bore internal wall prevents sharp edges from slicing wire and clogging gas diffusers
Gapless Bend Memory: Maintains concentric internal diameter when torch cable is twisted or bent
Bird-Nesting Elimination: Lowers push-friction values to prevent wire buckling at the feeder drive housing
Arc Stability: Uniform wire feed velocity yields stable welding voltage and reduced spatter
Thermal Resistance: Formulated to withstand radiative and conductive heat up to 400A
Integrated Brass Backend: Anchors into power pin using direct pressure to prevent gas leaks or liner slippage
Precision Trim Specification: Requires 3/4" (19.0 mm) extension from the edge of the head tube
