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The ITW / Miller 27-13A is a factory-calibrated mechanical shaft assembly designed as the internal structural and fluid-sealing core for Weldcraft WP-27A water-cooled mechanized TIG (GTAW) torches. It manages mechanical indexing, high-current transmission protection, and localized liquid coolant path sealing within high-amperage torch environments.
Features
Integrated Shaft Knob: Constructed from high-dielectric polymers to isolate high-frequency voltages and thermal energy
27-13-2 Inner O-Ring: Low-friction elastomeric ring designed for rotary and linear friction
27-13-3 Outer O-Ring: High-temperature fluoroelastomer (Viton/FKM) optimized for chemical resistance to TIG cooling fluids
Fluid Leak Prevention: Provides fluid isolation within the torch body cavity to protect internal electronics
Toolless Integration: Designed for insertion and removal without specialized tools during maintenance
Vibration Resistance: Calculated thread profiles and O-ring compression tolerances to resist loosening on CNC tables
OEM Dimensional Matching: Machined to engineering tolerances to reduce wear on internal guides and collet bodies
Low-Swell Formulation: O-rings resistant to deionized water, anti-freeze additives, and corrosion inhibitors
Specifications
Manufacturer: ITW Welding / Miller Electric / Weldcraft
Manufacturer Part Number (MPN): 27-13A
Airgas Part Number: MIL27-13A
Global Trade Item Number (GTIN): 608201025015
Primary System Compatibility: Weldcraft WP-27A Water-Cooled Machine TIG Torches
Nominal System Amperage Rating: 500 Amps DC / 350 Amps AC
