This turning center features a unique back-working turret and paired R-spindle that significantly speed up the cutting process on the right side of the cutting operation. The availability of greater variation in simultaneous front-and-back processing and a Y-axis slide speed up the cycle by approximately 35% compared to conventional machines with two spindles and one turret.
Overlap machining by main turret and R-spindle
Cutting by back-working turret
[ Main components and movements ]
| Items | Model Name | BNJ-34SY3 | BNJ-42SY3 | BNJ-51SY3 |
| Machining Capacity & Chucking System | ||||
| Max. Bar Capacity | L spindle | φ34mm (1.34" Dia.) |
φ42mm (1.65" Dia.) |
φ51mm (2" Dia.) |
| R spindle | φ34mm (1.34" Dia.) |
φ42mm (1.65" Dia.) |
φ42mm (1.65" Dia.) |
|
| Type of Collet Chuck | L/R spindle | Stationary | Stationary | Stationary |
| Standard Turning Length | 100 mm | 100 mm | 100 mm | |
| Size of Power Chuck | L/R spindle | 5"/4" | 5"/4" | 5"/4" |
| Spindle | ||||
| Spindle Nose | L/R spindle | Sp. Flat/Sp. Flat | Sp. Flat/Sp. Flat | A2-6/Sp. Flat |
| Spindle Speed Range | L spindle | 80〜7,000 min-1 | 60〜6,000 min-1 | 50〜5,000 min-1 |
| R spindle | 67〜5,000 min-1 | 67〜5,000 min-1 | 67〜5,000 min-1 | |
| Spindle Motor (30min./Cont.) | L spindle | 7.5/5.5kW | 11/7.5kW | 11/7.5kW |
| R spindle | 5.5/3.7kW | 5.5/3.7kW | 5.5/3.7kW | |
| R-SP Slide Stroke | X2 | 70mm | 70mm | 70mm |
| Z2 | 525mm | 525mm | 525mm | |
| Main Turret | ||||
| Type of Turret Station | 12 Station | 12 Station | 12 Station | |
| Turret Indexing Time | 0.25sec. /1st. | 0.25sec. /1st. | 0.25sec. /1st. | |
| Turret Indexing Methods | AC Servo & Curvic C. | AC Servo & Curvic C. | AC Servo & Curvic C. | |
| Slide Stroke | X1 | 165 mm | 165 mm | 165 mm |
| Z1 | 246 mm | 246 mm | 246 mm | |
| Y1 | ±40mm | ±40mm | ±40mm | |
| Back-working Turret | ||||
| Type of Turret Station | 6 Station | 6 Station | 6 Station | |
| Turret Indexing Time | 0.2sec. /1st. | 0.2sec. /1st. | 0.2sec. /1st. | |
| Turret Indexing Methods | AC Servo & Curvic C. | AC Servo & Curvic C. | AC Servo & Curvic C. | |
| Revolving Tools (Main Turret / Option) | ||||
| No. of Revolving Tools Station | 12 | 12 | 12 | |
| Tool Speed Range | 60〜6,000 min-1 | 60〜6,000 min-1 | 60〜6,000 min-1 | |
| Tool Motor | 2.5kW | 2.5kW | 2.5kW | |
| Machining Capacity | Drill/Tap | φ13mm/ M8x1.25 | φ13mm/ M8x1.25 | φ13mm/ M8x1.25 |
| Machine Dimensions | ||||
| Machine Height | 1,720mm (67.7") | 1,720mm (67.7") | 1,720mm (67.7") | |
| Floor Space | 2,780 x1,536mm (109.5" x 60.5") |
2,780 x1,536mm (109.5" x 60.5") |
2,780 x1,536mm (109.5" x 60.5") |
|
| Machine Weight | 5,500 kg (12,125Lbs.) | 5,500 kg (12,125Lbs.) | 5,500 kg (12,125Lbs.) | |
