Machine Comparison
Citizen Miyano BNC-42 vs Citizen Miyano BND-51SY
Citizen Machinery vs Citizen Machinery · CNC Lathes
Summary
The Citizen Miyano BNC-42 and Citizen Miyano BND-51SY are both from Citizen Machinery's cnc lathes lineup, making this a common upgrade or lineup decision for shops already invested in the Citizen Machinery 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 cnc lathe.
Specifications Comparison
| Specification | Citizen Miyano BNC-42 | Citizen Miyano BND-51SY |
|---|---|---|
| Chuck Size | 6 inch | 6 in power chuck |
| Control | Mitsubishi M80 (Citizen Miyano) | Mitsubishi CNC |
| Max Bar Capacity | 42 mm (1.65 in) | 51 mm (2.0 in) ▲ |
| Main Spindle Speed | 6,000 RPM ▲ | 50 - 5,000 RPM |
| Machine Weight | 2,200 kg (4,850 lb) | 4,500 kg (9,921 lb) ▲ |
| Price Range | $80,000 - $120,000 ▲ | $180,000 - $260,000 |
Advantages
Citizen Miyano BNC-42
- Superior main spindle speed at 6,000 RPM vs 50 - 5,000 RPM
- More competitive pricing at $80,000 - $120,000 compared to $180,000 - $260,000
- Backed by Citizen Machinery's dealer and service network for parts and support
- Automotive shops producing precision sensor housings, fuel injector bodies, and small hydraulic fittings in medium-to-high volumes
Citizen Miyano BND-51SY
- Superior max bar capacity at 51 mm (2.0 in) vs 42 mm (1.65 in)
- Superior machine weight at 4,500 kg (9,921 lb) vs 2,200 kg (4,850 lb)
- Backed by Citizen Machinery's dealer and service network for parts and support
- Hydraulic and pneumatic manufacturers producing larger fittings, valve bodies, and couplings from 51 mm bar stock with cross-holes and back-end threading
Verdict
This is a close matchup. The Citizen Miyano BNC-42 and Citizen Miyano BND-51SY 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.