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The Miller Millermatic 355 with XR-Aluma-Pro Gun Package (951927) represents a significant leap forward in industrial MIG welding technology, specifically tailored for aluminum fabrication. This system replaces the legendary Millermatic 350P, utilizing modern inverter technology to reduce the power source weight to just 99 lbs (45 kg)—a 40% reduction—while maintaining a robust 400-amp maximum output. The core of this package is its ability to handle complex aluminum applications with ease, thanks to built-in Pulsed-MIG capabilities. Pulsing controls heat input, minimizing distortion on thin materials and reducing spatter, which eliminates post-weld cleanup and ensures superior fusion on thicker sections up to 1/2 inch.
Feeding soft aluminum wire is notoriously difficult with standard MIG guns. This package solves that challenge by including the XR-Aluma-Pro™ air-cooled push-pull gun with 25-foot leads. The push-pull system synchronizes the wire feed motor in the gun with the motor in the machine, ensuring consistent, birdnest-free wire delivery even at distances that would be impossible for standard push-only guns. This integration is seamless due to the Auto-Gun Detect™ feature, which automatically identifies the connection and adjusts voltage, wire speed, and timers for the specific gun type, allowing operators to switch between steel and aluminum setups rapidly.
The machine features a 7-inch color LCD interface equipped with Auto-Set™ Elite. This system simplifies setup by allowing users to select their wire type, diameter, gas mix, and material thickness, automatically configuring the optimal weld parameters. For experienced welders, the Electronic Parameter Chart and manual modes offer granular control. The unit is designed for universal connectivity across North American power grids, accepting 208, 240, 460, or 575 V input power in either single- or three-phase configurations. The included EZ-Latch™ Single Cylinder Running Gear enhances shop mobility, allowing the power source to be detached from the cart without tools for transport to remote field sites or tight workspaces.
| Additional Information |
|---|
| Brand:Miller |
| Amperage:400 |
| Voltage:208/230/460/575 V |
| Duty Cycle:60% |
| Weld Process:MIG (GMAW) |
| Packaging Description:1 of each |
| Process Type:MIG (GMAW), Pulsed MIG (GMAW-P), Flux Cored (FCAW) |
| Input Voltage / Phase:208/240/460/575 V, 1-Phase, 3-Phase |
| Output Range / Duty Cycle:310 A at 29.5 V, 60% duty cycle |
| Amperage Range:20 A - 400 A |
| Wire Feed Speed Range:50 - 800 IPM (1.3 - 20 m/min) |
| Net Weight:45 kg (99 lbs) |
| Included Accessories:XR-Aluma-Pro Push-Pull Gun, EZ-Latch Running Gear, Gas Regulator |
| Compatible Wire Sizes:Aluminum: 0.035 - 0.047 in (0.9 - 1.2 mm), Steel: 0.023 - 0.045 in (0.6 - 1.2 mm) |
| Max Open Circuit Voltage:90 VDC |
