The ROYCE MMA-400S is a heavy-duty MMA inverter welding machine designed for demanding metal fabrication, construction, repair, maintenance, and workshop applications. It uses IGBT inverter technology to provide stable welding performance with efficient power consumption. Available product specifications list a 20–400A current range, 220–230V input voltage, and compatibility with 1.6–5.0mm electrodes.
The machine is suitable for a wide range of metalworking applications, including gate and grill fabrication, structural work, equipment repairs, and general welding. Its portable design also makes it practical for both workshop and on-site use.






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