Strike-Arc Inverter Welder 120A

The Strike-Arc 120A Inverter Welder is a highly portable, entry-level DC welding machine engineered for light-duty repairs and home DIY projects. Utilizing efficient IGBT inverter technology, this unit provides a much smoother arc than traditional heavy transformers, making it an ideal choice for maintaining garden gates, small trailers, and light steel structures in the Heidelberg - GP region.

Technical Specifications

• Current Range: 20A – 120A (Stepless adjustment).
• Input Power: 230V / 50Hz (Standard household 3-pin plug).
• Duty Cycle: 60% at 120A (Designed for intermittent repair work).
• Electrode Compatibility: Best suited for 2.0mm and 2.5mm welding rods.
• Technology: DC Inverter (Energy saving and stable output).

Key Performance Features

• Ultra-Portable Design: Weighing significantly less than the 160A model, this unit is easy to carry up a ladder or into tight spaces, perfect for quick fixes on Stafix fence brackets or overhead security bars.
• Easy-Start Ignition: Features an automatic "Hot Start" that boosts current during the initial strike, reducing the frustration of electrodes sticking to cold metal—a common issue during chilly Winter 2026 mornings.
• Arc Stability: Maintains a consistent voltage even with slight hand-movement, ensuring clean weld beads even for those who are not professional welders.
• Safety Overload Protection: Built-in thermal sensors automatically shut down the machine if it exceeds its duty cycle, protecting the internal electronics from overheating during the Easter 2026 project rush.
• Digital Interface: Often equipped with a clear digital display for precise amperage settings, allowing you to dial in the exact heat required for thin-wall square tubing.

Professional Usage & Tips

• Electrode Choice: For the 120A model, 2.5mm 6013 electrodes are the "sweet spot." They strike easily and provide enough penetration for most 1.6mm to 3.0mm mild steel sections.
• Extension Cord Caution: If you must use an extension lead, keep it as short as possible. Using a long, thin household cord will cause a power drop, resulting in a weak, "stuttering" arc.
• Clean Connections: Ensure your earth clamp is attached to "bright" metal. Use a Kaufmann wire brush or grinder to remove rust or paint from the connection point for a stable circuit.
• Inverter Maintenance: Always keep the unit off the ground in dusty environments to prevent the cooling fan from sucking in iron filings or Gauteng red dust, which can short-circuit the internal boards.
• Safety First: Always wear a Strike-Arc Auto-Darkening Helmet and Dromex welding gloves. The arc from an inverter is intense and can cause "arc eye" or skin burns very quickly.

Common Use Cases

• Home Repairs: Fixing loose hinges on garden gates or reinforcing security screens.
• Hobbyist Projects: Creating metal garden art or custom furniture frames.
• Light Maintenance: Repairing steel cages for Pascali Pumps or small tool brackets.
• Automotive: Tacking exhaust mounts or light-duty bakkie rail repairs.

Pro Tip: When welding thin materials like 1.6mm square tubing, set the machine to roughly 65A – 75A and use a "stitch" welding technique (short bursts) to prevent burning holes through the steel. For the best results, store your welding rods in a dry, airtight container to prevent moisture absorption, which leads to splatter and poor weld quality.