Machine Comparison
Makino a500iR vs Mitsui Seiki Vertex 100
Makino vs Mitsui Seiki · 5-Axis Machining Centers
Summary
The Makino a500iR from Makino and Mitsui Seiki Vertex 100 from Mitsui Seiki are direct competitors in the 5-axis machining centers category. The Mitsui Seiki Vertex 100 leads in x travel (1,000 mm (39.4 in) vs 560 mm (22.0 in)). The Makino a500iR leads in rapid traverse (60 m/min (2,362 ipm) vs 50 m/min (1,969 ipm)). 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 5-axis machining center.
Specifications Comparison
| Specification | Makino a500iR | Mitsui Seiki Vertex 100 |
|---|---|---|
| X-Axis Travel | 560 mm (22.0 in) | 1,000 mm (39.4 in) ▲ |
| Y-Axis Travel | 640 mm (25.2 in) | 700 mm (27.6 in) ▲ |
| Z-Axis Travel | 640 mm (25.2 in) ▲ | 500 mm (19.7 in) |
| Tool Capacity | 60 tools standard | 60 tools (90 optional) |
| Rapid Traverse | 60 m/min (2,362 ipm) ▲ | 50 m/min (1,969 ipm) |
| Accuracy | ±0.003 mm (±0.00012 in) ▲ | +/-2.0 um |
| Repeatability | ±0.002 mm (±0.00008 in) ▲ | +/-1.0 um |
| Control | Makino Professional 6 (Pro 6) | Fanuc 31i-B5 with nano-smoothing |
| A Axis Range | +30° to -120° (150° total, direct drive) | +/-120 degrees ▲ |
| Spindle Taper | HSK-A63 | HSK-A63 |
| Price Range | $450,000 - $650,000 ▲ | $500,000 - $750,000 |
Advantages
Makino a500iR
- Greater z travel of 640 mm (25.2 in) accommodates larger workpieces
- Faster rapid traverse at 60 m/min (2,362 ipm) reduces non-cutting time between operations
- Tighter positioning accuracy at ±0.003 mm (±0.00012 in) for precision-critical work
- Tighter repeatability at ±0.002 mm (±0.00008 in) for precision-critical work
- More competitive pricing at $450,000 - $650,000 compared to $500,000 - $750,000
Mitsui Seiki Vertex 100
- Greater x travel of 1,000 mm (39.4 in) accommodates larger workpieces
- Greater y travel of 700 mm (27.6 in) accommodates larger workpieces
- Superior a axis range at +/-120 degrees vs +30° to -120° (150° total, direct drive)
Verdict
This is a close matchup. The Makino a500iR and Mitsui Seiki Vertex 100 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.