CO2 MIG Welding Machine

Overview

The NB-350 CO2 MIG Welding Machine from Gongda (China Rebar Machinery, chinarebarmachinery.com) is a fully digital, DSP-controlled gas-shielded welding power source rated at 350 A. It is built for continuous industrial duty in rebar processing and general steel fabrication, handling both carbon steel and stainless steel with solid wire, flux-cored wire, or manual electrode.

Gongda is based in Hefei, Anhui, China, with the factory rooted in the electromechanical works of Hefei University of Technology. Machines are exported worldwide, including Russia, Spain, Latin America, the Middle East, Southeast Asia, and Africa.

Key specifications explained

• Control: Full digital DSP chip control for stable arc regulation and repeatable parameters.
• Input: 3-phase 380 V ±20% (300–560 V), 50–60 Hz — wide voltage tolerance suits unstable grids on site.
• Input capacity / power factor / efficiency: 13.5 kVA, 0.93, 90%.
• Output: Rated no-load voltage 71 V; current setting 30–350 A; voltage setting 12–38 V.
• Duty cycle: 60% at 350 A @ 40 °C; 100% at 350 A @ 25 °C.
• Wire: Ø0.8–Ø1.6 mm; wire feed speed 1.4–21 m/min.
• Welding sequences: no crater / crater / repeat crater / spot welding.
• Arc characteristics: −10 to +10 adjustable for fine arc tuning.
• Cooling, insulation, protection: forced air cooling, Class H insulation, IP23S.
• Ambient range: −10 °C to +50 °C.

Applications

The NB-350 is suited to rebar processing lines and steel fabrication shops: MIG/MAG welding of carbon and stainless steel, flux-cored welding for outdoor or dirty-joint conditions, and stick electrode welding as a backup process. Typical uses include rebar cages, mesh, coupler and anchor fabrication, structural frames, and general maintenance welding.

Why buy this model from Gongda

• Digital DSP platform: precise, repeatable settings across shifts and operators.
• Wide input tolerance: 300–560 V operation reduces downtime on unstable power supplies.
• Multi-process flexibility: solid wire, flux-cored wire, and electrode in one machine.
• Industrial duty: 100% duty cycle at 350 A @ 25 °C for continuous production.
• Factory engineering heritage: developed from the electromechanical works of Hefei University of Technology.

Shipping, certification & support

EAC certification is available for Russian and Eurasian Economic Union markets. Shipment is offered FOB Shanghai, Ningbo, or Qingdao. Every machine carries a 12-month warranty with spare parts support. Sales and technical support are available in English, Russian, Spanish, Arabic, French, Portuguese, German, and Indonesian. For quotations, specifications, or spare parts, contact WhatsApp +86 193 9277 7259 or visit chinarebarmachinery.com.