TIG Welding Machine

OTC DAIHEN ADP400 AC/DC TIG/Stick Welder (Discontinued)

The ADP400 was a versatile AC/DC TIG/stick welder from OTC DAIHEN. Its innovative torch‑trigger current adjustment allowed operators to increase or decrease output current directly from the torch for optimal welding parameters. Multiple welding modes (DC TIG, AC TIG, stick) ensured high quality across various applications. Adjustable AC frequency and heat input control improved thin‑plate weldability, with concentrated arc enhancing fillet and butt welds. Reliable arc starting (HF or touch start, even with extended cables) made it ideal for demanding environments. Widely used in bicycle, e‑bike, automotive, pressure vessel, and pipe industries. Although discontinued, its technology lives on in the successor model DA350P.

✨ Key Technology Advantages

• Torch‑trigger current adjustment — Real‑time current control for optimal welding.

• Three‑mode versatility — DC TIG, AC TIG, stick welding in one machine.

• Adjustable AC frequency — Controls heat input, improves thin‑plate performance.

• Concentrated arc — Easier fillet and butt welding on thin sheets.

• Stable arc starting — HF/touch start, reliable even with long cables.

• Wide current range — DC TIG 4-400A, AC TIG 10-400A, stick 10-300A.

• Multi‑industry application — Bicycle, automotive, pressure vessels, pipes, etc.

🔧 Primary Applications

Bicycle/e‑bike frame manufacturing, automotive parts, pressure vessels, pipe welding, thin‑plate fabrication, general manufacturing – especially where thin‑plate quality and arc concentration are critical.

📊 OTC DAIHEN ADP400 Technical Specifications