A surface plate structure, a tradition of the Miyano brand, has been carried over for the bed, an essential element for machining, while both size and weight have been increased in order to improve damping performance. Additionally, the coolant tank capacity has been increased to improve thermal stability. Rigidity of the entire turret tool post has been increased, and equipping with a Y axis enables the use of 12 stations. The number of installed tools has also been increased.
The cover has been completely redesigned to improve workability.
The opening has been enlarged for easier access and provided with a large window to improve visibility.
The port through which chips fall has been enlarged and the removal port has been moved closer to the
outer edge of the cover to make it easier to clean away chips.
These new NC units are standard-equipped with a dual-check safety function to improve safety and
productivity.
| Item | BNA-42CY5 | BNA-42SY5 | |
|---|---|---|---|
| Capacity (billet) | 135 mm | 135 / 110 mm | |
| Max. machining length | 200 mm (300 mm) | 100 mm (200 mm) | |
| Standard machining diameter | SP1 | 42 mm dia. | — |
| SP2 | — | 42 mm dia. | |
| Axes stroke | |||
| X axis | 140 mm | 140 mm | |
| Z axis | 285 mm | 285 mm | |
| Y axis | 70 (+/-35) mm | 70 (+/-35) mm | |
| B axis | — | 360 mm | |
| Number of spindles | 1 | 2 | |
| Spindle speed | SP1 | 60 to 6,000 min⁻¹ | 50 to 5,000 min⁻¹ |
| SP2 | — | — | |
| Closing tube through-hole diameter | SP1 | 43 mm dia. | — |
| SP2 | — | 30 mm dia. | |
| Collet chuck type | SP1 | Hardinge S20, DIN173E, B&S #22D, JPN34, Hainbuch | JPN, DIN171E |
| SP2 | — | DIN173E, B&S #22 | |
| Power chuck type | SP1 | 5″ and 6″ hollow chucks | 5″ hollow chuck |
| SP2 | — | 4″ hollow chuck | |
| Number of tool posts | 1 | 1 | |
| Type of tool post | 12 ST. | 12 ST. | |
| Opposite side distance of tool post | 300 mm | 300 mm | |
| Max. turning radius of tool post | 505 mm dia. | 505 mm dia. | |
| Dimensions of tools used | ⧄ 20 mm | ⧄ 20 mm | |
| Dimensions of tool post holes | 25 mm dia. | 25 mm dia. | |
| Number of installed rotary tools | Max. 12 | Max. 12 | |
| Type of rotary tool drive | Independent clutch drive | Independent clutch drive | |
| Rotating speed of rotary tools | 50 to 5,000 min⁻¹ | 50 to 5,000 min⁻¹ | |
| Machining capacities | Drill | Max. 10 dia. | Max. 10 dia. |
| Tap | Max. M6 × 1 | Max. M8 × 1.25 (Limited to spiral and point taps for M8 × 1.25) Max. M8 × 1.25 for BSBM | |
| Rapid feed rate | X axis | 20 m/min | 20 m/min |
| Z axis | 20 m/min | 20 m/min | |
| Y axis | 12 m/min | 12 m/min | |
| B axis | — | 20 m/min | |
| Slide thrust | X axis | 5 kN | 5 kN |
| Z axis | 5 kN | 5 kN | |
| Y axis | 6.7 kN | 6.7 kN | |
| B axis | — | 5 kN | |
| Tailstock travel distance | 200 mm | ||
| Morse taper size | MT2 | ||
| Max. slide thrust | 4.3 kN (at 3.4 MPa) | ||
| Min. slide thrust | 0.57 kN (at 0.45 MPa) | ||
| Drive method | Hydraulic | ||
| Spindle motor | SP1 | 11.7 / 5.5 / 5.5 kW (15% / 15 min / cont.) | 11.7 / 5.5 / 5.5 kW (15% / 15 min / cont.) |
| SP2 | 5.5 / 3.7 kW (15 min / cont.) | 5.5 / 3.7 kW (15 min / cont.) | |
| Rotary tools motor | 2.8 / 1.0 kW | 2.8 / 1.0 kW | |
| Coolant pump motor | 0.25 kW | 0.25 kW | |
| High-pressure coolant motor | 1.1 / 0.75 kW (60 / 50 Hz) | 1.1 / 0.75 kW (60 / 50 Hz) | |
| Power supply | AC 200 / 220 ±5% ~10%, 50 / 60 Hz ±1% | AC 200 / 220 ±5% ~10%, 50 / 60 Hz ±1% | |
| Power supply capacity | 16 kVA | 26 kVA | |
| Air pressure source | 0.5 MPa | 0.5 MPa | |
| Fuse capacity on facilities side | 75 A | 100 A | |
| Hydraulic tank capacity | 18 L | 18 L | |
| Lubricating oil tank capacity | 2 L | 2 L | |
| Coolant tank capacity | 225 L | 225 L | |
| Machine height | 1,745 mm | 1,745 mm | |
| Required floor surface area | W 2,260 × D 1,433 mm | W 2,350 × D 1,433 mm | |
| Machine weight | 3,430 kg | 3,880 kg | |
