Machine Comparison
EOS M 300-4 vs EOS M 400-4
EOS vs EOS · Metal Additive Manufacturing
Summary
The EOS M 300-4 and EOS M 400-4 are both from EOS's metal additive manufacturing lineup, making this a common upgrade or lineup decision for shops already invested in the EOS ecosystem. These machines are closely matched across most specifications, making the decision more about specific feature priorities, dealer support, and your existing shop ecosystem than raw spec advantages. Both machines are proven performers in production environments and represent solid investments for shops in the market for a metal additive manufacturing.
Specifications Comparison
| Specification | EOS M 300-4 | EOS M 400-4 |
|---|---|---|
| Laser Power | 4 x 400 W | 4 x 400 W |
| Build Volume | 300 x 300 x 400 mm (11.8 x 11.8 x 15.7 in) | 400 x 400 x 400 mm (15.75 x 15.75 x 15.75 in) ▲ |
| Control | EOS proprietary | EOS proprietary |
| Laser Type | Yb-fiber laser | Yb-fiber laser |
| Number Of Lasers | 4 (full-overlap architecture) | 4 |
| Scan Speed | Up to 7.0 m/s | Up to 7.0 m/s |
| Focus Diameter | ~100 µm | ~100 µm |
| Layer Thickness | 20 - 100 µm (material dependent) | 20 - 100 µm (material dependent) |
| Technology | Direct Metal Laser Sintering (DMLS) | Direct Metal Laser Sintering (DMLS) |
| Materials | Titanium, Inconel, Aluminum, Cobalt Chrome, Stainless Steel, Maraging Steel, Tool Steels | Aluminum, Inconel, Steel, Titanium, Tool Steels |
| Inert Gas | Argon or Nitrogen | Argon or Nitrogen |
| Machine Dimensions | 4,181 x 1,613 x 2,355 mm (164.6 x 63.5 x 92.7 in) | 4,181 x 1,613 x 2,355 mm (164.6 x 63.5 x 92.7 in) |
| Software | EOSPRINT 2, Siemens NX integration | EOSPRINT, EOSTATE monitoring |
| Price Range | $1,200,000 - $1,600,000 ▲ | $1,500,000 - $2,500,000 |
Advantages
EOS M 300-4
- More competitive pricing at $1,200,000 - $1,600,000 compared to $1,500,000 - $2,500,000
- Backed by EOS's dealer and service network for parts and support
- Aerospace serial production of flight-critical components such as fuel nozzles, brackets, and turbine blades where throughput directly impacts program economics
EOS M 400-4
- Superior build volume at 400 x 400 x 400 mm (15.75 x 15.75 x 15.75 in) vs 300 x 300 x 400 mm (11.8 x 11.8 x 15.7 in)
- Backed by EOS's dealer and service network for parts and support
- Aerospace OEMs producing flight-critical structural components, turbine blades, and heat exchangers in titanium and Inconel
Verdict
This is a close matchup. The EOS M 300-4 and EOS M 400-4 trade advantages across different specifications, making neither a clear winner on paper alone. Your decision should come down to practical factors: which dealer is closer, which control system your operators already know, what tooling ecosystem you're invested in, and which machine's specific strengths match your highest-volume work. Get quotes on both, run test cuts with your actual parts if possible, and factor in long-term service and support costs.