INFORMATION
The SB-20RII offers various improvements to further enhance performance, versatility and ergonomics. This includes additional tool stations, increased power, higher spindle speeds, advanced control features, and improved accuracy. Despite its added capabilities, such as the ability to process components up to 25.4mm in diameter, the SB-20RII has a 10% smaller footprint than the best-selling SB-20R Type G.
Offering a total of 7 axes, the main spindle platen of the SB-20RII includes 6 turning tools, two fixed ER-16 spindles for cross-working, plus a further three modular cross power-driven stations that accept a variety of cartridge attachments. The flexibility of the SB-20RII is further enhanced by its ability to switch between guide bush mode and non-guide bush mode.
Incorporating various technologies to minimise heat generation, the SB-20RII includes Star’s innovative thermal displacement correction technology to optimise accuracy, stability and machining performance. The machine is equipped with Star’s innovative new ECO mode and is compatible with the latest developments including Step Cycle Pro chip-breaking technology, last part completion mode and Easy Edit programming utility.
BENEFITS
- Standard machining diameter 20mm (25.4mm optional)
- Maximum Z1 stroke of 205mm in Swiss mode (Guide Bush)
- Switchable between guide bush and non-guide bush modes
- Main & sub spindle speed 10,000 RPM
- C-axis control on main and sub spindles
- 3 Modular (cartridge) stations on main platen
- Thermal displacement correction technology
- Step Cycle Pro chip-breaking technology
- ECO Mode energy saving function
DEMO VIDEO
KINEMATIC DIAGRAM
SPECIFICATIONS
| Item | SB-20R Ⅱ |
|---|---|
| Max. machining diameter | ⌀ 20 mm (25/32 in) OP : ⌀ 25.4 mm (1 in) |
| Max. headstock stroke | G.B. type 205 mm (8 in) MR25 : 196 mm (7-15/16 in) |
| N.G.B. type Bar diameter × 2.5 (Max. 50 mm) (Max. 1-31/32 in) | |
| Tool | 6 tools (□ 12 mm) / 5 tools (□ 16 mm) |
| Sleeve holder | |
| Number of tools 5-tools type ⌀ 22 mm × 5 tools | |
| Max. drilling capability ⌀ 12 mm | |
| Max. tapping capability M10 × P1.5 | |
| Power driven attachment | Number of tools Cross drilling : 2 spindle (ER16) cartridge type : 3 pos. (ER16) |
| Max. drilling capability ⌀ 7 mm | |
| Max. tapping capability M6 × P1.0 | |
| Maximum speed Max. 8 000 min-1 | |
| Drive motor 1.2 kW | |
| Rapid feed rate | 35 m/min (X1, Y1, Z1, X2, Z2) |
| Main spindle indexing angle | C-axis control |
| Main spindle speed | Max. 10 000 min-1 (OP : Max. 8 000 min-1) |
| Main spindle motor | 2.2 kW (CONT.) / 3.7 kW (10 min / 25 % ED) |
| Coolant tank capability | 180 l; |
| Dimensions (W × D × H) | 2 070 × 1 095 × 1 775 mm |
| Center height | 1 060 mm |
| Weight | Approx. 2 000 kg |
| Power consumption | 4.2 kVA |
| A-weighted sound pressure | 75 dB |
| Item | SB-20R Ⅱ |
|---|---|
| Max. chucking diameter | ⌀ 20 mm (25/32 in) OP : ⌀ 25.4 mm (1 in) |
| Max. length for front ejection | 105 mm (4-9/64 in) |
| Max. parts projection length | 30 mm (1-3/16 in) |
| 4-spindle backworking unit |
Number of tools 4 tools (Stationary tool / Power driven tool) |
|
Max. drilling capability
Stationary tool : ⌀ 8 mm (⌀ 5/16 in) OP : 10 mm (25/64 in) Power driven tool : ⌀ 6 mm (15/64 in) |
|
|
Max. tapping capability
Stationary tool : M6 × P1.0 (OP : M8 × P1.25) Power driven tool : M5 × P0.8 |
|
| Sub spindle indexing angle | C-axis control |
| Sub spindle speed | Max. 10 000 min−1 (OP : Max. 8 000 min−1) |
| Sub spindle speed control | AC servo drive |
| Sub spindle motor | 1.5 kW (CONT.) / 2.2 kW (15 min / 60 % ED) |
LINKS
Download Brochure