Tool Steel
Powered by Beam Shaping. Built for Industrial Production.
The EOS M4 ONYX FLX is an industrial metal 3D printer, combining four 1.0 kW beam shaping fiber laser with optimized gas flow and the RFS Pro filter system. Its build volume accommodates large components and efficient batch layouts for serial production.
Have a Closer Look
Optimized Gas Flow
A dedicated, homogeneous gas flow system specifically engineered for demanding high-power beam shaping applications. The optimized design supports clean optics, stable processing conditions, consistent part quality, and reduced purge times.
High-Power Beam Shaping Laser Sources
Four advanced multi-mode beam shaping fiber lasers, each delivering up to 1.0 kW of laser power, enabling high precision, enhanced process stability, and high productivity.
Maximized Build Volume
With a build size of 450 × 450 × 400 mm*, the EOS M4 ONYX FLX is ideal for large parts and higher throughput.
*including build platform
Efficient Powder Management
Closed-loop automation with Volkmann Powder Handling – EOS Edition ensures safety and process efficiency.
Smart Waste Handling
RFS Pro filter system reduces hazardous waste, eliminates extra passivation media and simplifies disposal.
Smart Process Optimization
EOS Smart Fusion reduces supports, improves surface quality, and minimizes post-processing effort.
Automated Job Handling
Overnight job starts and fast job changeovers (＜30 min) with the Grenzebach Dual Setup Station – EOS Edition.
Technical Data
EOS
M4 ONYX FLX
| Build Volume | 450 x 450 x 400* mm (17.7 x 17.7 x 15.7 in) |
| Laser Type | Yb-fiber laser; 4 x 1000 W |
| Presicion Optics | 4 F-theta-lens(es); 4 High-speed scanner(s) |
| Scan Speed | up to 7.0 m/s (23.0 ft/s) |
| Focus Diameter | approx. 90 µm (0.00354 in) |
| Power Supply | 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) |
| Recommended Installation Space | min. 5500 x 2370 x 2730 mm (216.5 x 93.3 x 107.5 in) |
| Weight | approx. 5900 kg (13007 lbs) |
| Software | EOS BUILD , EOS SMART MONITORING |
* Building height = Full height minus the height of the building platform (ranging from 35mm to 40mm)
Beam Shaping: Seven Laser Beam Profiles
The four 1.0 kW beam shaping fiber lasers of the EOS M4 ONYX FLX switch rapidly between seven beam profiles - from a Gaussian profile (index 0) via combined core and ring profiles (index 1-5) to a full ring profile (index 6). The beam diameter ranges from approx. 90 µm (core) to approx. 200 µm (ring), so the energy distribution can be adapted to material, layer thickness and part geometry.
Your benefits with beam shaping:
- Higher build rates: thicker layers at stable process conditions
- Cleaner processing: less spatter and fewer process by-products
- Tailored material properties: control over the microstructure, e.g. from isotropic to anisotropic grain structures in IN718
- One system, many applications: the right beam profile for each material and process requirement
Materials & Processes
The EOS M4 ONYX FLX combines high-performance hardware with validated material processes. Beam shaping enables increased layer thicknesses and greater control over energy distribution, supporting productive manufacturing and application-specific material properties.
EOS NickelAlloy IN718 - 80 µm and 120 µm
Advanced beam shaping technology enables productivity increases of up to 100%, supported by the ability to increase layer thickness while maintaining high process stability and cleaner processing conditions. Beyond productivity, it offers greater flexibility in tailoring material properties to specific application requirements. For EOS NickelAlloy IN718, this ranges from nearly isotropic grain structure for general industrial applications to controlled anisotropic grains for demanding high-temperature and high-stress applications.
EOS MaragingSteel MS1 - 80 µm
For EOS MaragingSteel MS1, the 80 µm beam shaping process, combined with optimized gas flow, significantly reduces spatter generation and process-related defects, resulting in more stable processing conditions and improved part quality. These improvements enable reliable processing across large exposure areas and during extended build jobs, supporting the demanding requirements of industrial serial production.
Nickel Alloy
Get Inspired
Entering the Next Era of AM
BLOg
Discover how dynamic beam shaping improves laser energy distribution to increase productivity, enhance process stability, and expand material capabilities.
Next-Generation Beam Shaping Technology for AM
INNOVATION
Learn how EOS Metal Solutions powered by beam shaping technology deliver greater flexibility, increased throughput, and enhanced material processability.
Tackling the Hidden Challenge in Metal AM
BLOG
Explore how RFS Pro recovers valuable powder and neutralizes reactive process waste, helping reduce material loss and simplify handling.
Expand Your AM Knowledge & Skills
EOS M4 ONYX Webinar
On-Demand Webinar
Explore the EOS M4 ONYX platform and the technologies behind productive industrial metal 3D printing.
Beam Shaping in Additive Manufacturing
WHITEPAPER
Understand the fundamentals of beam shaping and how laser energy distribution influences productivity, process stability, and material properties.
From Zero to Hero in Metal AM
On-Demand Webinar
Explore the limitless possibilities in metal additive manufacturing. This webinar offers insights into various metal AM technologies, their strengths and weakness and suitability for production.
EOS Software Solutions
Connect data preparation, process optimization, monitoring, and production IT with EOS software.
EOS Build is the foundation for efficient additive manufacturing. It enables data preparation and job optimization via EOSPRINT with full control over process parameters. EOS Hub allows remote machine monitoring. As a site license, EOS Build covers your entire machine park for consistent quality and streamlined workflows.
EOS Smart Monitoring fingerprints reference jobs and compares them with serial builds, reducing non-destructive testing by up to 50%. Thermal management features like Smart Fusion and Replay improve surface finish, reduce supports and post-processing. Beam shaping and low-angle processes boost productivity and enable complex geometries.
EOS Service Solutions
Maintain system performance with qualified maintenance, remote assistance, and on-site support from EOS. Flexible service options help resolve technical issues and make service costs more predictable.
The FullServiceFlex package combines maintenance, remote service, priority support, and defined response times, subject to regional availability. Additional options allow service coverage to be adapted to your production requirements.
