Ronch 350 TIG AC/DC
The Ronch 350 TIG AC/DC welding equipment offers TIG AC/DC (ideal for aluminum in AC and steel and stainless steel in DC), high frequency (HF) for clean ignitions, and electronic protections that sustain operation in demanding environments—including field work and power grid variations.
- Download the Specs Sheet
- Download the User's Manual
- Request the service manual
On the other hand, the Ronch 350 TIG AC/DC has features that increase productivity and quality: generator compatibility, 440 V protection, foot pedal control, and 220–240 V, 50/60 Hz power supply. This combination allows its operation to change materials and thicknesses with arc stability and repeatability, maintaining the pace of production in the workshop and on site.
Technical specifications of the Ronch 350 TIG AC/DC
| Feature | Value | |||
|---|---|---|---|---|
| Input power (V) | 1phz~220/230/240±10% | 3phz~220/230/240±10% | ||
| Nominal input power (KW) | 36 AC MMA | 34 AC TIG | 38 AC MMA | 28 AC TIG |
| 40 DC MMA | 35 DC TIG | 40 DC MMA | 30 DC TIG | |
| Work cycle (40ºC 10min) | 200A a 60% | 250A a 60% | 350A a 60% | |
| 160A a 100% | 200A a 100% | 280A a 100% | ||
| Current range (A) | 10~200 | 10~250 | 10~350 | |
| Frequency (Hz) | 50 / 60 | |||
| Efficiency (%) | 85 | |||
| Lightening effect (%) (AC TIG) | -5 ~ +5 | |||
| Net weight (Kg) | 26.5 | |||
| Shipping dimensions (mm) | 550 × 240 × 445 | |||
| Amperage up & down slope time (sec.) | 0-10 | |||
| Refrigeration | AF | |||
| Isolation class | H | |||
| Protection class | IP23 | |||
| Pre/Post flux (sec.) | 0.1 ~ 2.0/ 0 ~ 10.0 | |||
| No-load voltage (V) | 58 | |||
Key benefits of the Ronch 350 TIG AC/DC for your operation
- Visible and repeatable quality: TIG leaves clean, slag-free welds with minimal spatter and heat control, reducing rework and improving cost per part.
- Single-source material coverage: AC/DC enables you to work with aluminum/magnesium (AC) and steel/stainless steel (DC), providing a single solution for high-value projects.
- HF and foot pedal = weld pool control: HF start provides clean arc ignition, while the foot pedal allows you to instantly modulate amperage for roots, thickness changes, or crater closure.
- Protections + generator operation: Temperature/voltage/current sensors, Protect 440 V, and generator compatibility help sustain production on site and in regions with unstable power grids.
- Water-cooled torch: The package with WP18SC, cooling unit, and cart promotes ergonomics and arc stability at high currents during extended shifts.
Industrial sectors that use TIG the most
Food and beverage/pharmaceutical: stainless steel pipes and tanks with hygienic seams and color control, essential for health audits.
Oil & Gas/Energy: pipe roots and critical passes in steel and stainless steel (DC), and aluminum components in structures and auxiliary housings (AC).
Metalworking: tools, cabinets, instrumentation, exchangers, and precision parts.
Transportation/automotive: visible and lightweight elements (stainless steel and aluminum) where finish is key.
Construction/metal architecture: stainless steel railings, frames, and decorative details for facades and street furniture.
Frequently asked questions about the Ronch 350 TIG AC/DC
1. Can this machine be used for TIG welding aluminum?
Yes. It is AC/DC: AC for aluminum/magnesium (cleaning action) and DC for steel and stainless steel (stable arc and controlled penetration).
2. What are the advantages of high frequency (HF) starting?
Clean starts without touching the workpiece, less tungsten contamination, and a more predictable weld pool in thin gauges.
3. Why does the foot pedal make a difference?
It allows you to regulate amperage in real time, which is key for gauge transitions, crater control, and weld bead aesthetics.
4. What accessories are included in the 350 package?
Water-cooled WP18SC torch, cooling unit, cart, electrode holder, work and ground cables.
5. Can it work on a generator and with voltage spikes?
Yes. It is promoted for its versatility with generators and Protect 440 V for input spikes (use of stable generators recommended).
6. What gas should be used in TIG welding?
High-purity argon is commonly used. For thick aluminum, some operations use a mixture with helium to improve penetration.
7. In which sectors is this equipment most suitable?
Food/pharmaceutical (sanitary stainless steel), oil & gas/energy (critical passes), metalworking, transportation, and metal architecture (visible finish).
8. What is the difference between AC and DC in practice?
AC cleans oxides and allows aluminum to be welded with a fluid bath. DC provides stability and control in steel and stainless steel, with less spatter.
9. How is the torch temperature managed at high currents?
With a water-cooled torch and its cooling unit, which dissipate heat and provide comfort during long shifts.
