Machine Comparison
EOS M 100 vs EOS M 400-4
EOS vs EOS · Metal Additive Manufacturing
Summary
The EOS M 100 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. The EOS M 100 leads in laser power (200 W vs 4 x 400 W). 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 100 | EOS M 400-4 |
|---|---|---|
| Laser Power | 200 W ▲ | 4 x 400 W |
| Build Volume | Ø 100 x 95 mm (Ø 3.94 x 3.74 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 | 1 | 4 ▲ |
| Focus Diameter | ~40 µm | ~100 µm ▲ |
| Layer Thickness | 20 - 50 µm (material dependent) | 20 - 100 µm (material dependent) |
| Scan Speed | Up to 7.0 m/s | Up to 7.0 m/s |
| Technology | Direct Metal Laser Sintering (DMLS) | Direct Metal Laser Sintering (DMLS) |
| Materials | Cobalt Chrome, Titanium, Stainless Steel, Precious metals | Aluminum, Inconel, Steel, Titanium, Tool Steels |
| Inert Gas | Nitrogen | Argon or Nitrogen |
| Machine Dimensions | 800 x 950 x 2,250 mm (31.5 x 37.4 x 88.6 in) | 4,181 x 1,613 x 2,355 mm (164.6 x 63.5 x 92.7 in) ▲ |
| Software | EOSPRINT, EOSTATE monitoring (optional) | EOSPRINT, EOSTATE monitoring |
| Price Range | $250,000 - $350,000 ▲ | $1,500,000 - $2,500,000 |
Advantages
EOS M 100
- Superior laser power at 200 W vs 4 x 400 W
- More competitive pricing at $250,000 - $350,000 compared to $1,500,000 - $2,500,000
- Backed by EOS's dealer and service network for parts and support
- Dental labs producing crowns, bridges, partial dentures, and custom abutments in cobalt chrome and titanium
EOS M 400-4
- Superior build volume at 400 x 400 x 400 mm (15.75 x 15.75 x 15.75 in) vs Ø 100 x 95 mm (Ø 3.94 x 3.74 in)
- Superior number of lasers at 4 vs 1
- Superior focus diameter at ~100 µm vs ~40 µm
- Superior machine dimensions at 4,181 x 1,613 x 2,355 mm (164.6 x 63.5 x 92.7 in) vs 800 x 950 x 2,250 mm (31.5 x 37.4 x 88.6 in)
Verdict
This is a close matchup. The EOS M 100 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.