907477 - Miller Big Blue 450 Duo CST Diesel Welder Generator

Industrial Power and Dual-Operator Efficiency

The Miller Big Blue 450 Duo CST is a premier engine-driven welder designed to meet the rigorous demands of infrastructure, pipeline, and construction projects. Engineered for efficiency, this machine features a dual-operator design that allows two welders to work simultaneously from a single power source. This capability not only doubles productivity but also reduces the number of machines required on-site, leading to significant fuel savings and a smaller equipment footprint.

At the heart of the Big Blue 450 Duo is a heavy-duty Mitsubishi S4L2 industrial diesel engine. Renowned for its durability, this 24.7 HP engine is built to run for 10,000 hours before requiring a major overhaul, ensuring years of reliable service in the field. The unit is Tier 4 Final compliant, meeting strict emissions standards while delivering robust performance. With a fuel tank capacity of 11.5 gallons and a high-efficiency rotating-field generator, the machine is optimized for long runtimes and economical operation.

Beyond welding, the Big Blue 450 Duo CST serves as a powerful generator, providing 12,000 watts of three-phase continuous power and 10,000 watts of single-phase power. This versatility allows crews to run tools, lights, and other essential equipment alongside welding operations. The machine supports Stick (SMAW), TIG (GTAW), and Air Carbon Arc Cutting (CAC-A) processes, making it a comprehensive solution for field maintenance and fabrication.

Operator safety and convenience are paramount. The unit operates at a quiet 72.2 dB, improving communication and reducing noise fatigue on the job site. The control panel features a multi-function fuel gauge, engine hour meter, and customizable oil change reminders. Additionally, the Adaptive Hot Start™ technology ensures easy arc starts without electrode sticking, even with difficult-to-run electrodes like E6010.