More power for Miller welding generator - Stationary Power Products

The deluxe model of Miller Electric Mfg. Co.'s Big 40 Cat engine driven welding generator now features a 15 to 350 amp a.c. welding output and a peak generator power of 5.5 kW, a 33 percent improvement over the previous model. Targeting petrochemical piping, structural steel work, maintenance and repair, the Big 40 Cat welder has complete multi-process capabilities (CC/CV, a.c./d.c.) and provides a 20 to 550 amp d.c. output with 60 percent duty cycle rating at 400 amps, 40 V.

"The addition of an AC output for TIG welding aluminum and more generator power create additional flexibility for heavy-duty maintenance and fabrication in the petrochemical, structural steel and mining industries," said John Luck, product manager for the Appleton, Wis.-based company.

"We added the a.c. output to meet the needs of customers who liked our old Trailblazer 44 engine drive, and this new arc equals or surpasses that machine in quality. The additional peak generator power helps start heavier loads and optimizes tool performance."

Powered by an indirect-injected, liquid cooled, four cylinder Caterpillar 3024 diesel engine rated 33 hp at 1250 rpm idle speed (1800 rpm weld speed), the Big 40 Cat welder is the quietest engine drive Miller offers. It generates a noise level of 65 dB(A) at idle and 73 dB(A) at maximum output, the company said.

Like Miller's other large engine drives, the Big 40 Cat welder features Arc-Drive technology for enhanced welding on pipe with E6010 electrodes and welding out of position with E7018 electrodes. The deluxe model also features engine gauges, weld meters and a polarity switch.

The engine powers a Miller generator that can provide a fill 5.5 kW of generator power for 30 seconds without the circuit breaker tripping or the voltage dipping too low.

"To determine peak generator power, Miller places all of its engine drives in a chamber with an ambient temperature of 104[degrees]F and draws power from the 120/240 V receptacles," said Luck. "For running most tools, power is considered acceptable if it stays within [+ or -]10 percent of the nominal voltage. "The generator and welding components of the Big 40 Cat welder are covered by Miller's True Blue three-year factory warranty. The engine is backed by worldwide Caterpillar support and service and has a two-year warranty.