Star CNC SB-12R Type G
Category: Star CNC


The SB-12R Type G offers impressive machining versatility within a compact footprint. The SB series main spindle platen includes six turning tools, two fixed high-speed ER11 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-12RG is further enhanced by its ability to switch between guide bush mode (Swiss type) and non-guide bush mode.

The fully independent sub-spindle with C axis control coupled with driven tool capability across all four back working stations further enhances the machining capability of the SB series.


  • Standard machining diameter 12mm (13mm optional)
  • Maximum Z1 stroke of 205mm in Swiss mode (Guide Bush)
  • Switchable between guide bush and non-guide bush modes
  • Main spindle speed 15,000 rpm, sub-spindle speed 12,000 rpm
  • C-axis control on main and sub spindles
  • Up to 7 power tools on main spindle
  • 4 Back-working power tools available
  • Fully independent sub spindle for maximum overlapping
  • 3 Modular (cartridge) stations on main platen




Standard Machine Specs

Item 4-spindle cross dirlling unit/ 5-spindle cross drilling unit/Cartridge-type cross drilling unit (5-spindle/5-spindle high speed)
Max. machining diameter Ø 13 mm (33/64 in)
Tool 6 tools (12mm) / 7 tools (10mm)
4-Spindle sleeve holder Number of tools Front 4 tools
Rear 4 tools
Max. drilling capacity ø10mm(25/64in)
Max. tapping capacity M10XP1.5
Power driven att. Number of tools Cross power driven att./Cross power driven att. 2 tools (ER11)
4 tools (ER16)/5 tools (ER11)/ Cartridge type: 3 Pos
Max. drilling capability ER16 Ø 7mm(9/32in)
Max. drilling capability ER11 Ø 5mm(3/16in)
Max. tapping capability ER16 M6 x P1.0
Max. tapping capability ER11 M5xP0.8
Spindle speed ER16 Max. 6,000min-1/____ /Max. 6,000min-1/ Max. 6,000min-1
Spindle speed ER11 ____ / Max. 10,000-1/ Max. 8,000-1 / Max. 10,000-1
Drive motor 1.0kw (continuous)/ 1.2kw (5min./30%ED)
Rapid feed rate 35m/min (X1, Y1, Z1, X2, Z2)
Main spindle indexing angle C-axis control
Main spindle speed Max. 15,000min-1
Main spindle motor 2.2 kw (continuous)/ 3.7 kw (10min/25%ED)
Coolant tank capability 180l
Dimension (W x D x H) 2,070 x 1,177 x 1,760 mm
Center height 1,060mm
Weight 1,750kg
Power consumption 4.5KVA

Backworking Attachment

Max. chucking diameter Ø 13 mm (33/64in)
Max. length for front ejection 80 mm (3-5/32in)
Max. part projection length 30 mm (1-11/64in)
Back 4-Spindle unit Number of tools 4 tools
Max. drilling capability Stationary tool ø 8mm(5/16in)
Max. drilling capability Power driven tool ø 6mm(15/64in) :OP
Max. tapping capability Stationary tool M6 x P1.0
Max. tapping capability Power driven tool M5 x P 0.8
Power-driven att. spindle speed Max. 8,000min-1 (OP)
Power-driven att. drive motor 0.75kw (OP)
Sub spindle indexing angle C-axis control
Sub spindle speed Max. 12,000min-1
Sub spindle speed control AC spindle drive
Sub spindle motor 0.55kw (continuous)/ 1.1kw (15min/40%ED)