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The ITW / Miller 411-1 is a momentary, normally open (NO) barrel-style trigger switch designed for industrial semi-automatic MIG (GMAW) welding torches. It serves as a standard component for Tregaskiss and Bernard air-cooled gun handle assemblies and is cross-compatible across ITW welding brands.
Features
Momentary trigger action for immediate arc control and safety
Potted main circuit components to resist mechanical stress, metallic dust, and weld spatter
Heat-resistant polymer housing for air-cooled welding applications
Low-drag design for consistent arc starts
Ergonomic shape optimized for T-Style handles to reduce operator hand fatigue
Drop-in replacement design requiring no specialized tools for installation
High-cycle mechanical stress resistance
Specifications
Switch Type: Momentary (non-locking)
Switching Action: Single-position barrel style
Contact Configuration: Normally Open (NO)
Manufacturer: Tregaskiss (ITW Company)
Brand Compatibility: Miller, Tregaskiss, Bernard
Handle Compatibility: 300A and 400A large handle designs