Machine Comparison
Citizen Miyano BNE-51 vs Citizen Miyano BNJ-42
Citizen Machinery vs Citizen Machinery · CNC Lathes
Summary
The Citizen Miyano BNE-51 and Citizen Miyano BNJ-42 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 BNE-51 | Citizen Miyano BNJ-42 |
|---|---|---|
| Max Turning Diameter | 250 mm (9.84 in) chuck work ▲ | 200 mm (7.87 in) chuck work |
| Max Turning Length | 130 mm (5.12 in) ▲ | 100 mm (3.94 in) |
| Control | Mitsubishi M80 (Citizen Miyano) | Mitsubishi M80W dual-path (Citizen Miyano) |
| Max Bar Capacity | 51 mm (2.0 in) ▲ | 42 mm (1.65 in) |
| Main Spindle Speed | 5,000 RPM | 6,000 RPM ▲ |
| Sub Spindle Speed | 5,000 RPM | 6,000 RPM ▲ |
| Live Tool Speed | 6,000 RPM | 6,000 RPM |
| Spindle Motor | 11 kW (15 hp) ▲ | 7.5 kW (10 hp) |
| Number Of Axes | 5 (X1, Z1, Y1, X2, Z2) | 8 (X1, Z1, Y1, X2, Z2, Y2 + C1, C2) ▲ |
| Turret Positions | 12 (with live tooling) | 24 (12 upper + 12 lower) ▲ |
| Rapid Traverse X | 20 m/min | 20 m/min |
| Rapid Traverse Z | 24 m/min | 24 m/min |
| Machine Weight | 3,500 kg (7,716 lb) | 4,200 kg (9,259 lb) ▲ |
| Price Range | $150,000 - $220,000 ▲ | $200,000 - $280,000 |
Advantages
Citizen Miyano BNE-51
- Superior max turning diameter at 250 mm (9.84 in) chuck work vs 200 mm (7.87 in) chuck work
- Superior max turning length at 130 mm (5.12 in) vs 100 mm (3.94 in)
- Superior max bar capacity at 51 mm (2.0 in) vs 42 mm (1.65 in)
- Superior spindle motor at 11 kW (15 hp) vs 7.5 kW (10 hp)
- More competitive pricing at $150,000 - $220,000 compared to $200,000 - $280,000
Citizen Miyano BNJ-42
- Superior main spindle speed at 6,000 RPM vs 5,000 RPM
- Superior sub spindle speed at 6,000 RPM vs 5,000 RPM
- Superior number of axes at 8 (X1, Z1, Y1, X2, Z2, Y2 + C1, C2) vs 5 (X1, Z1, Y1, X2, Z2)
- Superior turret positions at 24 (12 upper + 12 lower) vs 12 (with live tooling)
- Superior machine weight at 4,200 kg (9,259 lb) vs 3,500 kg (7,716 lb)
Verdict
This is a close matchup. The Citizen Miyano BNE-51 and Citizen Miyano BNJ-42 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.