EOS M 300-1

$900,000 - $1,100,000 Updated 2026-03-17

Key Specifications

build volume

300 x 300 x 435* mm (11.8 x 11.8 x 17.1 in)

laser type

Yb-fiber laser; 4 x 1000 W

laser power

400 W

number of lasers

scan speed

up to 7.0 m/s (23.0 ft/s)

focus diameter

approx. 100 µm (0.00394 in)

Overview

The EOS M 300-1 is a single-laser LPBF system built on EOS's next-generation M 300 platform architecture. Where the M 300-4 offers four lasers for maximum throughput, the M 300-1 serves a distinct market: aerospace suppliers, research institutions, and tier-one manufacturers who need a larger build envelope than the M 290 delivers, combined with the consistency and process control simplicity of a single-laser system. The 300 x 300 x 400 mm build volume represents a meaningful step up from the 250 x 250 mm M 290 class, opening the door to larger structural brackets, turbine housings, and medical implant trays that exceed the smaller platform's capacity.

The M 300-1 uses a single 400 W Yb-fiber laser with EOS's beam shaping optics, delivering a focus diameter in the 80–100 µm range for high-resolution detail. EOS designed the M 300 platform with automation-readiness from the ground up: the system features an integrated powder management system with closed-loop sieving and refilling that reduces manual powder handling and minimizes operator exposure. The build chamber can be purged to below 0.1% oxygen, and the gas circulation system maintains consistent laminar flow across the entire 300 x 300 mm build area.

Process monitoring on the M 300-1 is handled by the EOSTATE suite, which includes melt pool monitoring (MPM), exposure optical tomography (ExposureOT), and powder bed inspection. These tools are particularly important for aerospace customers pursuing NADCAP accreditation or AS9100 certification, as they provide the digital quality records required by prime contractors. The M 300 platform is also compatible with EOS's AMC (Additive Manufacturing Concept) automation cell for lights-out production.

The M 300-1 competes directly with the Renishaw RenAM 500S and the SLM Solutions SLM 125 when buyers are evaluating single-laser systems with larger-than-M 290 envelopes. EOS positions the M 300-1 as the precision-first, qualification-friendly option for regulated production, with the upgrade path to M 300-4 available if throughput demands grow. Pricing is typically in the $900,000–$1,100,000 range.

Full Specifications

Parameter	Value
Build Volume	300 x 300 x 435* mm (11.8 x 11.8 x 17.1 in)
Laser Type	Yb-fiber laser; 4 x 1000 W
Laser Power	400 W
Number Of Lasers	1
Scan Speed	up to 7.0 m/s (23.0 ft/s)
Focus Diameter	approx. 100 µm (0.00394 in)
Layer Thickness	20 – 100 µm (material dependent)
Build Rate	Up to 12 cm³/h (material dependent)
Technology	Laser Powder Bed Fusion (LPBF / DMLS)
Materials	Aluminum alloys, Ti6Al4V, Inconel 718/625, Stainless Steel 316L, CobaltChrome, Maraging Steel
Inert Gas	Argon or Nitrogen
Oxygen Level	< 0.1%
Power Consumption Max	9.5 kW
Machine Dimensions	5221 x 2680 x 2340 mm (205.6 x 105.5 x 92.1 in)
Software	EOSPRINT 2, EOSTATE MPM + ExposureOT
Automation	Compatible with EOS AMC automation cell
Presicion Optics	4 F-theta-lens(es); 4 High-speed scanner(s)
Power Supply	3 x 63 A
Power Consumption	max. 19.6 kW / typical 16.0 kW
Compressed Air Supply	7 Bar; 15 m³/h (102 psi; 530 ft³/h)
Recommended Installation Space	min. 8800 x 5200 x 3500 mm (346.5 x 204.7 x 137.8 in)
Machine Weight	approx. 5500 kg (12125 lbs)

Specifications sourced from eos.info — verified 2026-03-28

Strengths & Limitations

Strengths

300 x 300 x 400 mm build envelope fits larger aerospace structural brackets and medical implant trays that exceed the M 290 platform
Single-laser architecture delivers consistent, well-characterized melt pool behavior preferred in regulated aerospace and medical qualification workflows
Integrated closed-loop powder management reduces manual handling and operator powder exposure between builds
EOSTATE MPM and ExposureOT monitoring provide full digital quality records for NADCAP and AS9100 compliance
Automation-ready platform with EOS AMC cell compatibility for lights-out serial production integration

Limitations

Single 400 W laser limits build rate compared to the M 300-4 quad-laser variant — throughput-focused buyers should evaluate the multi-laser option
Machine footprint (3,500 x 1,780 mm) is significantly larger than the M 290, requiring more floor space and facility planning
Premium pricing in the $900K–$1.1M range is a substantial entry cost versus older M 290 platforms available on the used market

Best For

Aerospace tier-one and tier-two suppliers printing structural brackets, ducting, and housings that exceed the M 290's 250 x 250 mm XY envelope Medical device manufacturers requiring full-build-chamber qualification documentation for implant-grade titanium and cobalt chrome Research institutions and innovation centers that want single-laser process simplicity with a larger working volume than the M 290 Manufacturers planning future automation integration who want a platform designed for lights-out operation from day one

Frequently Asked Questions

01 What is the difference between the EOS M 300-1 and the EOS M 300-4?

The M 300-1 uses a single 400 W laser while the M 300-4 has four 400 W lasers operating simultaneously across the same 300 x 300 mm build plate. The M 300-4 offers roughly 3–4x the build rate of the M 300-1. The M 300-1 is preferred when process simplicity, qualification documentation, and lower capital cost take priority over throughput.

02 How does the EOS M 300-1 compare to the EOS M 290?

The M 300-1 provides a larger build volume (300 x 300 x 400 mm vs. 250 x 250 x 325 mm), a newer platform architecture with integrated powder management, and better automation compatibility. The M 290 has a larger global installed base and a wider range of qualified third-party material parameters. For new purchases, the M 300-1 is generally the better long-term investment.

03 What materials does the EOS M 300-1 support?

The M 300-1 supports EOS's full range of metal powders including aluminum alloys (AlSi10Mg), Ti6Al4V ELI, Inconel 718 and 625, Stainless Steel 316L, CobaltChrome SP2, and Maraging Steel MS1. The same 20+ material library available on the M 290 platform is compatible with the M 300 series, with updated parameters optimized for the M 300 gas flow and optics system.

04 Is the EOS M 300-1 suitable for aerospace part qualification?

Yes — the M 300-1 was designed with regulated-industry qualification in mind. The EOSTATE monitoring suite generates melt pool and powder bed records throughout every build, and the M 300 platform architecture has been used in NADCAP-accredited additive manufacturing facilities. EOS works directly with customers on material qualification packages for aerospace alloys.

05 Can the EOS M 300-1 be upgraded to the M 300-4 later?

EOS has not publicly documented a field upgrade path from single-laser to quad-laser for the M 300 series. In practice, customers expecting throughput growth typically purchase the M 300-4 from the outset or plan a second system acquisition. EOS's sales team can advise on the current platform roadmap during the procurement process.