ONA Diamond C400 Wire EDM

The ONA Diamond C400 is a precision wire EDM machine from Spain's ONA Electroerosion, one of Europe's longest-established EDM specialists. Built around ONA's proprietary Diamond generator technology and advanced numerical control, the C400 delivers a 400 x 300 mm work envelope with precision and surface quality benchmarks that reflect ONA's decades of expertise in high-end industrial EDM design.

ONA's Diamond generator is the technological foundation of the C400, providing high-frequency, fine-energy discharge control that enables the machine to achieve surface finishes in the Ra 0.1 µm range and form accuracy within ±1.5 µm. The generator continuously monitors the discharge gap and adapts energy delivery to maintain stable cutting conditions across varying material characteristics and flushing environments — ONA's implementation of the adaptive control philosophy that leading wire EDM builders now consider table stakes for precision applications.

The C400 handles workpieces up to 600 kg and reaches maximum cutting speeds of 320 mm²/min in 50 mm thick steel. Its taper cutting system supports angles up to ±30° at 100 mm workpiece height. The machine accepts wire diameters from 0.1 to 0.3 mm, covering the standard range from production roughing to precision finishing applications in hardened tool steel, carbide, and conductive exotic alloys.

ONA's CNC controller on the C400 features a modern touch interface with on-board part programming, automatic cutting condition selection from a material and thickness database, and full network connectivity. ONA machines are particularly well-represented in European aerospace, automotive, and medical device supply chains, and the C400's design reflects the rigorous quality standards these sectors demand. European service and applications support is a noted differentiator for ONA versus Asian competitors in the region.