EOS M4 ONYX
Image: eos.info, EOS
Key Specifications
build volume
laser source
laser power
number of lasers
precision optics
scan speed
How much does the EOS M4 ONYX cost?
Price estimate
We do not have a price for the EOS M4 ONYX that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The EOS M4 ONYX is a six-laser metal additive manufacturing system with a 450 x 450 x 400 mm (17.7 x 17.7 x 15.7 in) build volume, a figure EOS states as including the build platform, and 6 x 400 W of Yb-fiber laser power. It sits above the M 400-4, which lists 4 x 400 W over 400 x 400 x 400 mm (15.7 x 15.7 x 15.7 in): the height is the same, the plate is larger and there are half again as many lasers.
It is specified as a production machine for two alloys. The validated materials are EOS Titanium Ti64 and EOS NickelAlloy IN718, and the layer thickness row is tied to them: 60 µm for Ti64, and 40 µm and 80 µm for IN718. Anyone planning to run another alloy should ask EOS what is qualified, because the table names only these two.
The other production feature is the changeover. EOS lists job changeover as automatic and under 30 minutes, through a Dual Setup Station, which matters on a machine whose output depends on how little time it spends between builds. Six F-theta lenses and six high-speed scanners serve the lasers, with a focus diameter of approx. 90 µm (0.00354 in) and a scan speed of up to 7.0 m/s (23.0 ft/s).
Services are substantial. The power requirement is 3 x 54 A, with consumption of max. 45.0 kW and typical 29.0 kW. Compressed air is 7 bar at 20 m³/h (102 psi; 706 ft³/h). The machine measures 5500 x 2370 x 2730 mm (216.5 x 93.3 x 107.5 in) and weighs approx. 5700 kg (12,566 lb), and the installation space is min. 7100 x 6000 x 3300 mm (279.5 x 236.2 x 129.9 in).
Full Specifications
| Parameter | Value |
|---|---|
| Build Volume | 450 x 450 x 400 mm (17.7 x 17.7 x 15.7 in), including build platform |
| Laser Source | Yb-fiber laser; 6 x 400 W |
| Laser Power | 6 x 400 W |
| Number of Lasers | 6 |
| Precision Optics | 6 F-theta lenses; 6 high-speed scanners |
| Scan Speed | up to 7.0 m/s (23.0 ft/s) |
| Focus Diameter | approx. 90 µm (0.00354 in) |
| Layer Thickness | 60 µm (EOS Titanium Ti64); 40 µm and 80 µm (EOS NickelAlloy IN718) |
| Validated Materials | EOS Titanium Ti64, EOS NickelAlloy IN718 |
| Job Changeover | Automatic, under 30 minutes (Grenzebach Dual Setup Station - EOS Edition) |
| Power Requirement | 3 x 54 A |
| Power Consumption | max. 45.0 kW / typical 29.0 kW |
| Compressed Air Supply | 7 bar; 20 m³/h (102 psi; 706 ft³/h) |
| Machine Dimensions | 5500 x 2370 x 2730 mm (216.5 x 93.3 x 107.5 in) |
| Installation Space | min. 7100 x 6000 x 3300 mm (279.5 x 236.2 x 129.9 in) |
| Machine Weight | approx. 5700 kg (12,566 lb) |
Specifications sourced from eos.info — verified 2026-10-03
Strengths & Limitations
Strengths
- 6 x 400 W Yb-fiber lasers with 6 F-theta lenses and 6 high-speed scanners
- 450 x 450 x 400 mm (17.7 x 17.7 x 15.7 in) build volume, including build platform
- Automatic job changeover in under 30 minutes
- Validated for EOS Titanium Ti64 and EOS NickelAlloy IN718, with layer thickness stated per material
- Focus diameter of approx. 90 µm (0.00354 in), the same as the M 400-4
Limitations
- Only two validated materials are listed: EOS Titanium Ti64 and EOS NickelAlloy IN718
- The 400 mm (15.7 in) height includes the build platform, so the usable part height is lower than the figure
- Typical power consumption of 29.0 kW and max. 45.0 kW on a 3 x 54 A supply
- Weighs approx. 5700 kg (12,566 lb), against approx. 4900 kg (10803 lbs) for the M 400-4
- Titanium is listed at a single layer thickness, 60 µm
Best For
Frequently Asked Questions
01
Six. The laser source is listed as Yb-fiber, 6 x 400 W, with 6 F-theta lenses and 6 high-speed scanners. Scan speed is up to 7.0 m/s (23.0 ft/s) and the focus diameter is approx. 90 µm (0.00354 in).
02
EOS Titanium Ti64 and EOS NickelAlloy IN718. Layer thickness is given per material: 60 µm for EOS Titanium Ti64, and 40 µm and 80 µm for EOS NickelAlloy IN718. No other alloy appears in the table, so check with EOS before planning work in anything else.
03
EOS lists job changeover as automatic and under 30 minutes, carried out through a Dual Setup Station. On a six-laser machine the time between builds is a real part of the output, so this row is worth weighing alongside the laser count.
04
The M 400-4 lists 400 x 400 x 400 mm (15.7 x 15.7 x 15.7 in), 4 x 400 W and approx. 4900 kg (10803 lbs). The M4 ONYX lists 450 x 450 x 400 mm (17.7 x 17.7 x 15.7 in) including build platform, 6 x 400 W and approx. 5700 kg (12,566 lb). Both give a focus diameter of approx. 90 µm (0.00354 in).
05
A power requirement of 3 x 54 A, with consumption of max. 45.0 kW and typical 29.0 kW, and compressed air at 7 bar and 20 m³/h (102 psi; 706 ft³/h). The machine measures 5500 x 2370 x 2730 mm (216.5 x 93.3 x 107.5 in), and the installation space is min. 7100 x 6000 x 3300 mm (279.5 x 236.2 x 129.9 in).
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