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Miller’s Big Blue® 400 Eco Pro Welder Generator Reduces Fuel Use by 25 Percent; Tier 4i Compliant

The Big Blue® 400 Eco Pro offers those in pipe welding, structural steel, fabrication, field maintenance and repair applications an industrial-strength welder generator that reduces fuel use, saves space and simplifies operation.


Highlights/Key Facts

APPLETON, Wis., May 17, 2010Miller Electric Mfg. Co. introduces the Big Blue® 400 Eco Pro welder generator for work in pipe welding, structural steel, fabrication, field maintenance and repair applications. Offering Stick, TIG, MIG, FCAW and CAC-A processes, the Big Blue Eco Pro reduces fuel use up to 25 percent and is 44-percent smaller/41-percent lighter than other models with similar output. Its 5,500 watts of peak power is plenty to run lights, grinders and many electrical tools, while its Mitsubishi S4L2 Tier 4i compliant diesel engine is designed to run 10,000 hours before a major overhaul and produces 50-percent less noise than previous models.

Taking into account average diesel costs of $4.00/gallon and the habits of a typical user—50 percent idle time, 40 percent at 150 amps, and 10 percent at 400 amps—a welder can save up to $1,990/year per machine in fuel costs without sacrificing performance.

Customer Quotes

“The Big Blue 400 Eco Pro reduced our fuel costs by about 1.6 gallons a day, or more than 31.7 gallons a month, while its smaller size and lighter weight has decreased transportation costs. Plus, its controls are very easy to use, and the stable, smooth arc quality has decreased the need for rework. We’re now more productive and cost efficient.”
—Frank Vucic, structure superintendent, McConnell Dowell, South East Asia PTE, LTD

“It’s much quieter than our previous machine, making it easier to communicate on the job site, reducing operator fatigue and decreasing noise levels in surrounding communities.”
—RGS Nair, welding foreman, QCON

Product Links

Big Blue® Eco Pro Product Page
Big Blue® Eco Pro Spec Sheet

Additional News Release Information

Built to Perform in Harsh Industrial Applications

Fuel savings and long engine life are achieved by tailoring the machine’s output to the user’s demand: the machine runs 1,500 RPM at idle, 1,800 RPM for welding up to 350 amps, and 3,000 RPM for high power applications up to 500 amps. The Big Blue 400 Eco Pro offers weld outputs and duty cycles to match a wide range of heavy-duty industrial applications:

All rated outputs are rated at 104 degrees and tested to 122 degrees Fahrenheit for optimal performance and integrity. Circuit boards are protected by Miller’s sealed aluminum vault that protects the machine’s electronics and performance from heat, moisture, dust and other atmospheric contaminants.

The operator interface is simplified with color-coded output terminals, a weld process select switch and newly designed fuel gauge/monitor. The fuel gauge includes an hour meter, oil change interval monitor, high coolant temperature/low oil pressure and low fuel shutdown that shuts down the engine before it runs out of fuel, making restarts easy. The machine also features thermal overload protection to prevent machine damage if the duty cycle is exceeded or airflow is blocked.

Up to 44 percent smaller and 41 percent lighter than other models, the Big Blue 400 Eco Pro takes up less room and reduces transportation costs while cutting operating costs by reduced fuel consumption.

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Image Information

JPG Name: Big Blue 400 Eco Pro
Caption: Miller’s Big Blue® 400 Eco Pro improves fuel economy by 25 percent and is 44 percent smaller and 41 percent lighter than other models.

About Miller
Miller Electric Mfg. Co., headquartered in Appleton, Wis., is a leading worldwide manufacturer of Miller brand arc welding equipment and is a wholly owned subsidiary of Illinois Tool Works Inc. (NYSE: ITW).

For more information, visit Miller’s Web site at, call 1-800-4-A-Miller (800-426-4553), e-mail, fax 877-327-8132, or write to Miller Electric Mfg. Co., P.O. Box 100, Lithonia, GA 30058.

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Editorial Contact: Bill Elverman, Insight Marketing, LLC, (562) 481-6972