Miller Big Blue® 450 Duo CST™ Diesel Engine-Driven Welder #907866

Dual-Operator Diesel Engine-Driven Welder with Quiet Operation and Fuel Efficiency (450A Output) #907866

The Miller Big Blue® 450 Duo CST™ diesel welder/generator delivers reliable dual-operator capability and exceptional arc performance for industrial multi-operator welding applications. Powered by a 24.7 hp Mitsubishi S4L2 Tier 4 Final diesel engine, this welder supports Stick, DC TIG, and Air Carbon Arc Cutting and Gouging processes.

Each power source provides 400A at 100% duty cycle for single-operator use or 200A per operator at 100% duty cycle for dual-operator use. With a 13.5-hour runtime at 50% load and a quiet operation of 71 dBA at 23 feet, it is ideal for jobsites that require both power and efficiency.

Download literature of this machine:

Spec Sheet - Miller Big Blue® 450 Duo CST

Processes

• Stick (SMAW)
• DC TIG (GTAW) Lift-Arc™
• Air carbon arc (CAC-A) - Rated: 3/16-inch (4.8 mm) carbons (paralleled)
• Air plasma cutting and gouging with optional Spectrum® models

Highlights

• Dual-Operator Capability: Allows two welders to operate independently with full control, providing up to 200 amps per operator at 100% duty cycle.
• Fuel Efficiency: Delivers a 13.5-hour runtime on a 13-gallon tank at 50% load, reducing refueling downtime and operational costs.
• Quiet Operation: Operates at 71 dBA at 23 feet, quieter than many single-operator models, improving jobsite communication and reducing noise hazards.
• Adaptive Hot Start™: Prevents electrode sticking by automatically increasing amperage during arc starts for smoother operation.
• Auxiliary Power Output: Provides 4,000 watts (120/240V) of continuous single-phase power for jobsite tools and lights.
• Heavy-Duty Mitsubishi Engine: Designed to run 10,000 hours before major overhaul, ensuring long-term durability and reliability.
• Vandalism Lockout Kit: Lockable hinged steel panel protects front controls and ignition switch for added security.

Benefits of the Miller Big Blue® 450 Duo CST™

• Enhanced Productivity: Dual-operator capability allows two welders to work simultaneously, doubling efficiency on the job site.
• Superior Arc Performance: Adaptive Hot Start™ ensures consistent arc starts on difficult electrodes like E6010.
• Versatility: Supports Stick, TIG, and air carbon arc gouging processes for a wide range of applications.
• Energy Efficiency: Reduced fuel consumption lowers operating costs and increases runtime.
• Durability: Mitsubishi engine delivers long-term performance with minimal maintenance.
• Jobsite Safety: Quiet operation improves communication and reduces noise hazards.

Fast, Free Shipping & Easy Returns

Enjoy fast, free shipping on the Miller Big Blue® 450 Duo CST™ Diesel Engine-Driven Welder #907866. If you're not completely satisfied with your purchase, take advantage of our easy returns process. For assistance, contact Welders Supply customer support at 1-844-682-0205.

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• Spec Sheet - Miller Big Blue® 450 Duo CST

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