EOS M 300-4

$1,200,000 - $1,600,000 Updated 2026-03-15

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

4 x 400 W

number of lasers

4 (full-overlap architecture)

scan speed

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

focus diameter

approx. 100 µm (0.00394 in)

Overview

The EOS M 300-4 is a quad-laser metal additive manufacturing system that represents EOS's answer to the throughput demands of serial production. While the venerable EOS M 290 proved that single-laser DMLS could deliver aerospace-quality parts, the M 300-4 quadruples the laser count to four 400 W Yb-fiber lasers, each capable of covering the full 300 x 300 mm build area. This full-overlap laser architecture means any laser can reach any point on the build plate, eliminating the stitching artifacts and exposure strategy compromises that plague zone-based multi-laser systems.

The build volume measures 300 x 300 x 400 mm (11.8 x 11.8 x 15.7 in), a meaningful increase over the M 290's 250 x 250 x 325 mm envelope. More importantly, the quad-laser configuration delivers up to 4x the build rate of the M 290 depending on part geometry and nesting density. For production applications running full build plates of identical parts — such as hip implant cups, turbine fuel nozzles, or aerospace brackets — the throughput improvement is dramatic and directly impacts per-part cost economics.

EOS designed the M 300-4 with a focus on production workflow automation. The system features an integrated powder handling module that automates sieving, storage, and transport, reducing manual operator interaction with metal powder. The build chamber uses an inert gas management system optimized for reactive metals like titanium and aluminum alloys. EOSTATE monitoring provides real-time melt pool, powder bed, and system health data for full build traceability.

The M 300-4 runs on EOSPRINT 2 software with full parameter control and supports the same extensive material library as the M 290 platform, including Ti64, IN718, AlSi10Mg, CoCr, and multiple stainless and maraging steels. The machine interfaces with Siemens NX for integrated CAD-to-print workflows. New EOS M 300-4 systems price between $1,200,000 and $1,600,000. Competitors include the SLM Solutions SLM 500, Trumpf TruPrint 3000, and Renishaw RenAM 500Q.

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	4 x 400 W
Number Of Lasers	4 (full-overlap architecture)
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 40+ cm³/h (material and geometry dependent)
Technology	Direct Metal Laser Sintering (DMLS)
Materials	Titanium, Inconel, Aluminum, Cobalt Chrome, Stainless Steel, Maraging Steel, Tool Steels
Inert Gas	Argon or Nitrogen
Powder Handling	Integrated automated module (sieving, storage, transport)
Monitoring	EOSTATE (melt pool, powder bed, system health)
Machine Dimensions	5221 x 2680 x 2340 mm (205.6 x 105.5 x 92.1 in)
Software	EOSPRINT 2, Siemens NX integration
CNC Control	EOS proprietary
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

Four 400 W lasers with full-overlap architecture deliver up to 4x throughput versus the single-laser M 290, fundamentally changing per-part cost economics for serial production
Full-overlap laser design means all four lasers can reach any point on the build plate, eliminating stitching artifacts and allowing optimal exposure strategies regardless of part placement
300 x 300 x 400 mm build volume provides 88% more volume than the M 290, enabling larger parts or significantly more parts per build in production nesting
Integrated automated powder handling reduces manual operator interaction with metal powder, improving safety and reducing build-to-build cycle time
EOSTATE monitoring delivers comprehensive melt pool, powder bed, and system health data for AS9100 and ISO 13485 traceability requirements
Same qualified material library and parameter ecosystem as the M 290, allowing process transfer from proven single-laser development to multi-laser production without re-qualification

Limitations

$1.2M-$1.6M price represents a significant step up from the M 290 and requires production volumes that justify the quad-laser throughput investment
Larger machine footprint of over 4 meters length requires more floor space and facility infrastructure than the M 290
Four-laser maintenance costs are proportionally higher than single-laser systems, with laser replacement representing a major periodic expense
Full productivity benefit is realized only when build plates are densely nested with parts — single-part builds or sparse nesting underutilize the quad-laser advantage

Best For

Aerospace serial production of flight-critical components such as fuel nozzles, brackets, and turbine blades where throughput directly impacts program economics Medical implant manufacturers producing high volumes of titanium and cobalt-chrome hip cups, knee trays, and spinal cages at production scale Automotive OEMs and tier-1 suppliers scaling metal AM from prototyping to series production for lightweighting and design optimization applications Service bureaus transitioning from prototype-focused M 290 operations to production-scale metal AM with reduced per-part costs Defense and space industry contractors building production volumes of mission-critical metal AM components with full process traceability

Frequently Asked Questions

01 What does a new EOS M 300-4 cost?

New EOS M 300-4 systems typically sell for $1,200,000 to $1,600,000 depending on configuration, including powder handling module, monitoring options, and material-specific accessories. Annual service contracts range from $80,000 to $120,000. The total cost of ownership including facility modifications, powder supply, post-processing equipment, and gas supply should be factored into the business case.

02 How does the M 300-4 compare to the EOS M 290?

The M 300-4 is EOS's production-scale evolution of the M 290. Key upgrades include four lasers instead of one (up to 4x throughput), 300 x 300 x 400 mm build volume versus 250 x 250 x 325 mm, integrated automated powder handling, and enhanced monitoring. The M 290 remains the better choice for R&D, parameter development, and low-volume production. The M 300-4 is justified when production volumes demand higher throughput and per-part cost reduction.

03 What is full-overlap laser architecture?

In the EOS M 300-4, all four lasers can access the entire 300 x 300 mm build area. This contrasts with zone-based multi-laser systems where each laser is restricted to a quadrant of the build plate. Full overlap allows the system to dynamically assign lasers to any part on the build plate, optimizing exposure time and eliminating stitching seams where laser zones would otherwise meet. The result is better part quality and more flexible nesting strategies.

04 Can I transfer M 290 parameters to the M 300-4?

Yes, this is one of the M 300-4's key advantages. EOS designed the M 300-4 to use the same parameter sets and material qualifications as the M 290. Parts qualified on the M 290 can be transferred to the M 300-4 for production scaling with minimal re-qualification. However, multi-laser exposure strategies may require validation to confirm mechanical property equivalence, particularly for aerospace and medical applications.

05 What is the actual build rate improvement over the M 290?

The theoretical maximum improvement is 4x with all four lasers active. In practice, the actual throughput gain depends on part geometry, nesting density, and exposure strategy. Densely nested build plates with many similar parts approach the 4x improvement. Sparse builds with few large parts may see 2-3x improvement since not all lasers can be productively engaged simultaneously. EOS provides build simulation tools to estimate cycle times for specific part geometries.

06 What facility requirements does the M 300-4 need?

The M 300-4 requires significantly more infrastructure than the M 290: a larger facility footprint (4.2 x 1.6 m machine plus powder handling and access space), higher-capacity inert gas supply (argon or nitrogen), 3-phase electrical service, adequate ventilation and HVAC for heat rejection, and powder handling safety provisions. The integrated powder handling module simplifies some workflow aspects but requires its own floor space. EOS provides detailed facility planning documentation during the quotation process.