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 BNJ-42 are both turning centers with live tooling, but they aim at different work. The BNE-51 is a mid-size 51 mm (2.0 in) bar machine for varied turn-mill parts. The BNJ-42 is a 42 mm (1.65 in) production machine with 8 axes (X1, Z1, Y1, X2, Z2, Y2 + C1, C2) and a Mitsubishi M80W dual-path control for cutting front and back features at the same time.
The BNE-51 takes bigger parts: 250 mm (9.84 in) chuck work against 200 mm (7.87 in), 130 mm (5.12 in) of turning length against 100 mm (3.94 in), and an 11 kW (15 hp) spindle against 7.5 kW (10 hp). The BNJ-42 spins faster, with 6,000 RPM main and sub-spindles against 5,000 RPM, and weighs 5,300 kg against 7,800kg.
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) |
| Bar Capacity | 51 mm (2.0 in) ▲ | 42 mm (1.65 in) |
| Max Spindle Speed | 5,000 RPM | 6,000 RPM ▲ |
| Spindle Power | 11 kW (15 hp) ▲ | 7.5 kW (10 hp) |
| Sub-Spindle Speed | 5,000 RPM | 6,000 RPM ▲ |
| Live Tool Speed | 6,000 RPM | 6,000 RPM |
| Rapid Traverse | 20 m/min | 20 m/min |
| Axes | 5 (X1, Z1, Y1, X2, Z2) | 8 (X1, Z1, Y1, X2, Z2, Y2 + C1, C2) |
| Control | Mitsubishi M80 (Citizen Miyano) | Mitsubishi M80W dual-path (Citizen Miyano) |
| Machine Weight | 7,800kg | 5,300 kg |
| Floor Space | 2,690×2,160mm | 2,840×1,560mm(Without Chip Conveyor) |
Advantages
Citizen Miyano BNE-51
- 51 mm (2.0 in) bar capacity and 250 mm (9.84 in) chuck work against 42 mm and 200 mm
- 130 mm (5.12 in) turning length against 100 mm (3.94 in)
- 11 kW (15 hp) spindle against 7.5 kW (10 hp)
Citizen Miyano BNJ-42
- 6,000 RPM main and sub-spindles against 5,000 RPM
- 8 axes with a Mitsubishi M80W dual-path control against 5 axes
- Lighter at 5,300 kg against 7,800kg
Verdict
Choose the BNE-51 for job shops and production cells running a mix of parts up to 51 mm, such as transmission components, coupling nuts and valve bodies, where the extra capacity and 11 kW (15 hp) spindle are worth more than speed. Choose the BNJ-42 for dedicated high-volume programs on parts within 42 mm bar that have features on both ends, where simultaneous dual-path cutting and 6,000 RPM spindles shorten every cycle.