Fronius 3400 Used Mig Welder
Mig Welder with SWF
NZ Prepared, installed and supported nationwide by Scott Machinery.
Product overview
About this machine.
Fronius is a global leader in advanced welding technology, known for delivering precision, reliability, and innovation in every weld. Designed for professional fabricators and industrial applications, Fronius welding machines feature cutting-edge inverter technology, exceptional arc stability, and user-friendly digital controls. From MIG/MAG, TIG, and Stick welding to automated and robotic solutions, Fronius systems provide consistent performance, energy efficiency, and superior weld quality across a wide range of materials and thicknesses.
The Fronius VarioSynergic 3400 is an industrial grade MIG/MAG welding power source engineered for serious structural steel, machinery, and container fabrication work. With a welding current range spanning approximately 10 - 340 A, it gives you the capacity to handle moderate to heavy fabrication jobs with confidence. It features synergic control technology: simply set the material thickness and filler wire type, and the machine automatically adjusts voltage, current and deposition behavior, greatly simplifying setup and boosting consistency. A strong build underscores its suitability for industrial use: it includes a 4-roller wire feed drive for smooth wire impressions, automatic cooling cut-out, and protection rating of IP23 for tougher environments.
Key performance highlights:
- 3 phase supply
- Open-circuit voltage around 45 V.
- Working voltage roughly 14.5 - 31.0 V.
- Generator compatible design, making it suitable for onsite or remote power scenarios.
Please note:
- We have not internally tested this machine as we do not have the capacity. We welcome you bringing your own gas bottle and running it through its paces before purchasing.
- We believe it is in good working order.
We have made every effort to accurately represent the features and specifications of this machine through the photos and additional information.
Talk to Scott Machinery
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Tell us about the largest job, material and likely workload. We can confirm the fit — or point you to the model either side.
Auckland · Christchurch · Nationwide support