EOS M4 Onyx Targets High-Volume Metal 3D Printing at IMTS 2026

Six lasers, one build chamber

EOS is using IMTS 2026 to push metal additive manufacturing further into the factory floor. The German company is demonstrating the EOS M4 Onyx, a six-laser metal 3D printer built for high-volume serial production rather than one-off prototypes. The system uses six 400-W fibre lasers inside a 450 x 450 x 400-mm build volume, giving manufacturers more parts per build and a lower cost per component.

The M4 Onyx replaces the earlier M 400 and M 400-4 as EOS's workhorse industrial platform. A four-laser variant, the M4 Onyx FLX, uses 1-kW beam-shaping lasers for different applications. Both machines share the same core goal: make metal AM predictable enough for daily production shifts.

Automation and stability

Moving metal printing from prototyping to production requires more than raw speed. EOS has focused on process controls, gas flow optimisation, and active temperature management to keep thermal conditions stable across the build platform. Those details matter for aerospace, defence, and semiconductor customers who need repeatable part properties and tight tolerances.

Job changeovers can be completed in under 30 minutes. That speed matters when a shop is running multiple builds per day and needs to keep machine utilisation high. Automated pallet transfer systems also help maintain consistent fixturing between additive and subtractive operations.

Waste and powder recovery

The M4 Onyx uses EOS's RFS Pro filtration system, which eliminates conventional filter consumables and claims more than 90 percent powder recovery. Powder is one of the biggest ongoing costs in metal AM, so higher recovery rates directly improve the economics of serial production while cutting hazardous waste.

At IMTS, EOS is showing M4 Onyx-built parts including a Boom Supersonic engine component, a Beehive Fury drone engine, and a rocket nozzle made on the AMCM M 8K system. Those examples highlight where the technology is most useful: complex, high-performance parts where conventional machining would require extensive tooling and assembly.

The production shift is real

Metal additive manufacturing has spent years promising to move beyond prototyping. Systems like the M4 Onyx are built specifically for that transition, combining multiple lasers, large build volumes, automated workflows, and better material handling into a single platform. Whether that translates into widespread adoption depends on manufacturers willing to invest in the infrastructure and training. For now, the hardware is ready.