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Miller® MIG Gun Liner

Airgas Part #:MIL212523

Manufacturer Part #:212523


$NA.NA /NA
Each

Item Details

  • The ITW Miller 212523 is an industrial-grade head tube wire conduit liner specifically designed for front-end torch head assemblies in push-pull Gas Metal Arc Welding (GMAW/MIG) systems. It facilitates the low-friction delivery of soft alloy filler wires, such as aluminum, from the torch head to the contact tip.

Features

  • High Lubricity: Low friction coefficient designed for soft metallic alloys
  • Anti-Galling: Prevents wire surface stripping and gouging
  • Wear Resistance: Phosphor bronze matrix prevents inner conduit grooving from wire movement
  • Thermal Deflection Stability: Maintains structural integrity under high-amperage radiant heat at the torch head
  • Non-Abrasive Interface: Eliminates aluminum shaving that clogs contact tips
  • Vibration Dampening: Reduces erratic wire feeding and micro-stuttering for arc stabilization
  • Electrical Isolation: Prevents internal micro-arcing between the wire and the head tube wall
  • Micro-Polished Bore: Low-coefficient-of-friction interior surface finish
  • Heat Resistance: Will not soften or melt during high duty cycles compared to PTFE/Teflon liners

Specifications

  • Manufacturer: Miller Electric Mfg. LLC (ITW Welding Company)
  • Manufacturer Part Number (MPN): 212523
  • Global Trade Item Number (GTIN/UPC): 715959309035
  • Material Composition: Phosphor Bronze Alloy (90%+ Copper, 5–9% Tin, 0.03–0.35% Phosphorus)
  • Total Component Length: 7.750 inches (196.85 mm)
  • Wire Diameter Capacity (Imperial): 0.030" minimum to 1/16" maximum
  • Wire Diameter Capacity (Metric): 0.8 mm minimum to 1.6 mm maximum
  • Component Type: Rigid/Semi-Rigid Front-End Head Tube Liner
  • Compatible MIG Gun Series: Miller XR Series (Air-Cooled and Water-Cooled), Miller XR Pistol MIG Guns, Miller Spoolmatic Series
  • Compatible Systems: Miller XR Control Assemblies, Millermatic 252 industrial push-pull setups
  • Mating Gas Diffuser: Part # 227749
  • Mating Head Tube: Part # 221514 (Air-Cooled)
  • Required O-Rings: Part # 164485 (Liner O-Ring) or Part # 191191 (Head Tube O-Ring)
  • Compliance Standards: ISO 9001:2000, CSA (Canadian Standards Association), UL (Underwriters Laboratories), RoHS, REACH

Applications

  • Aluminum Marine Fabrication: Construction of aluminum hulls, decks, and superstructures using 5000 and 6000 series wires (5356, 4043)
  • Automotive Manufacturing: Fabrication of aluminum trailer chassis, semi-truck beds, and fuel tankers
  • Aerospace and Defense: Assembly of lightweight tactical enclosures and non-magnetic structures
  • Cryogenic Pressure Vessels: Welding thick-walled aluminum tanks and piping for low-temperature gas storage
  • Industrial Push-Pull Welding: High-efficiency deposition of non-ferrous wires over extensive distances