Kjellberg i-cut 300

The Kjellberg i-cut 300 is a high-amperage industrial plasma cutting power source developed by Kjellberg Finsterwalde, the German company widely credited with inventing plasma cutting technology in 1957. Designed for heavy-duty production environments, the i-cut 300 delivers 300 amperes of cutting current to handle thick structural steel, heavy plate, and large-format fabrication work that would challenge lower-power systems. It occupies the upper tier of Kjellberg's mechanized plasma line, sitting above the i-cut 200 and targeting shipbuilding, heavy structural fabrication, and steel service centers.

At 300 A, the i-cut 300 can pierce and cut mild steel plate up to 80 mm thick in production mode and achieve severance cuts beyond 100 mm. Stainless steel capacity reaches approximately 60 mm and aluminum around 50 mm under production conditions. The system uses Kjellberg's proprietary fine-plasma torch technology, which narrows the plasma column through advanced gas swirl, nozzle geometry, and magnetic field shaping to produce significantly tighter kerfs and squarer cut faces than conventional high-amperage plasma. This makes the i-cut 300 viable not just for rough separation cuts but for near-net-shape parts requiring minimal secondary finishing.

The i-cut 300 is built around Kjellberg's plasma process controller, which manages gas pressures, flow rates, arc ignition sequencing, and consumable-life diagnostics from a centralized interface. The system integrates cleanly with major CNC table platforms through standard THC (torch height control) interfaces and analog/digital I/O. Kjellberg supplies complete process data — speeds, currents, gas settings — for a wide matrix of material types and thicknesses, simplifying setup for operators and reducing trial-and-error scrap during changeovers. The power source is designed for 100% duty cycle at rated current, which is essential for high-throughput plate shops running continuous production shifts.

Consumable performance is a Kjellberg hallmark. The i-cut 300 uses long-life electrode and nozzle designs that maintain cut quality over thousands of arc starts. Kjellberg's proprietary copper-hafnium electrode chemistry and precision-machined nozzles are manufactured in Germany to tight tolerances, giving the i-cut 300 a consumable cost profile that competes favorably with U.S. and Japanese rivals at equivalent amperage classes. The system supports both oxygen-plasma (for mild steel) and nitrogen/argon-hydrogen plasma (for stainless and aluminum), making it a single investment that covers a full range of conductive metals.

The i-cut 300 is typically paired with large-format cutting tables in the 3000 x 12000 mm or larger class and integrated with fume extraction, slag conveyors, and plate-handling automation in serious production facilities. Kjellberg's European distribution network and factory-trained service organization support the system globally, and the company's long history in plasma technology means process expertise is deeply embedded in consumable design, application notes, and direct field support. For operations where cut quality at maximum thickness is non-negotiable, the i-cut 300 is a primary contender in the 300 A industrial plasma segment.