The Star Micronics SB-20R Type G is an industrial-grade CNC Lathes & Turning Centers powered by the Fanuc 31i-B. a top spindle speed of 6,000 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Star SB-20R Type G Swiss-type lathe: 20 mm (25/32 in) bar, 205 mm headstock stroke, 6,000 rpm main and 9,000 rpm sub spindle, 1,700 kg.
| Standardized Parameters & Ratings | |
|---|---|
| Manufacturer (Brand) | Star Micronics (Japan) |
| Machine Type | CNC Lathes & Turning Centers |
| CNC Controller System | Fanuc 31i-B |
| Number of Controlled Axes | 3-Axis Simultaneous / Positioning |
| Maximum Spindle Speed | 6,000 RPM |
| Spindle Motor Rating | 2.2 kW |
| Spindle Taper Interface | Standard |
| Automatic Tool Changer (ATC) | 6 Tool Stations |
| Approx. Machine Weight | 1,700 kg |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Max Machining Diameter | 20 mm (0.787 in) |
| Number Of Axes | 7 |
| CNC Control | Fanuc 31i-B |
| Rapid Traverse | 35 m/min (X1,Y1,Z1,X2,Z2) |
| Machine Weight | 1,700 kg |
| Power Consumption | 8 kVA |
| Max Turning Diameter | ø20mm (25/32in) |
| Max Turning Length | 80mm (3-5/32in) |
| Bar Capacity | Ø20 mm (25/32 in) |
| Max Spindle Speed | 6,000 rpm |
| Spindle Motor Power | 2.2 kW (Continuous) / 3.7 kW (10min./25%ED) |
| Tool Capacity | 6 tools (ø12mm) / 7 tools (ø10mm) |
| Cnc Control | Fanuc 0i-TD |
| Electrical | 3.7KVA |
| Headstock Stroke | 205 mm (8 in) |
| Sub Spindle Speed | 9,000 rpm |
| Sub Spindle Power | 0.55 kW (Continuous) / 1.1 kW (15min./40%ED) |
| Turning Tools | 6 tools (□12 mm) / 7 tools (□10 mm) |
| Footprint | 2,070 mm × 1,177 mm × 1,760 mm |
Our best estimate for the Star SB-20R Type G is $120,000 - $200,000. This is an estimate for a swiss-type lathes in this class, not a quote from Star Micronics; configuration, tooling, automation and installation move the final price substantially. A specific price can be requested at https://machinetoolindex.com/machines/star-micronics-sb-20r-type-g#price; the request is passed to Star Micronics or an authorised dealer.
Up to 20 mm (25/32 in). The table shows no larger optional size. Within the same family the SB-16R Type G is listed at ø16mm (5/8in) and the SB-12R Type G at Ø13 mm (33/64 in), so the SB-20R is the one to pick when any part in the mix needs stock above 16 mm.
The main spindle is listed at 6,000 rpm with 2.2 kW continuous and 3.7 kW on the 10min./25%ED rating. The sub spindle is listed at 9,000 rpm with 0.55 kW continuous and 1.1 kW on the 15min./40%ED rating. The sub spindle is faster but has a quarter of the continuous power, so plan the heavy cuts for the main side.
Either 6 tools on 12 mm shanks or 7 tools on 10 mm shanks. The smaller shank buys one extra station, the larger one gives a stiffer tool. The table does not list driven tools, so ask for the cross-working and back-working tool configuration when you request a quotation.
The machine itself measures 2,070 mm × 1,177 mm × 1,760 mm and weighs 1,700 kg. Those figures cover the lathe only. A bar feeder, chip handling and coolant equipment sit outside them and should be added to the layout before the position is fixed.
The SB-20RII is listed with a spindle of Max. 10,000min-1 against 6,000 rpm here, an optional ø25.4mm (1in) bar size, and a weight of Approx. 2,000kg against 1,700 kg. Both show 35 m/min rapid traverse and a 2.2 kW continuous main spindle rating.
