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STAR SR-20 R is a high-precision CNC automatic lathe, providing excellent accuracy and reliable performance. Capacities: 7 axes, 2 spindles; max turning Ø 20 mm; max length 195 mm; drilling Ø up to 7 mm; threading up to 6 M (tapping length 75 mm); back-machining length 85 mm. Key specs: spindle 500–10,000 rpm (2.2/3.7 kW), back spindle 500–8,000 rpm (0.5 kW), rapid traverse 20 m/min, cutting speed 10,000 mm/min; supply 3x400 V 50 Hz; air 5 bar; total power 6 kVA; weight ~2000 kg; size 2207×1080×1700 mm. Equipment: LNS EXPRESS 320 S2 bar feeder (max 3200 mm, Ø 3–20 mm), parts catcher/conveyor, Müller CL2 high-pressure coolant 70 bar (145 l), SIEMENS fire extinguishing system. Delivers tight tolerances for automotive, watchmaking, tooling, aerospace and medical applications.
| Number of axis total | 7 |
| Number of spindles | 2 |
| Max. turning diameter | 20 mm |
| Maximum turning length | 195 mm |
| Max. drilling diameter | 7 mm |
| Max. threading diameter | 6 M |
| Inner taper type | ER16 |
| Spindle speeds: | |
| stepless | |
| from | 500 t/min |
| up to | 10000 t/min |
| Spindle power | 2.2 / 3.7 kW |
| C axis (spindle,resolution) | ° |
| Back spindle: | |
| speeds: | |
| from | 500 t/min |
| up to | 8000 t/min |
| Max. tapping length | 75 mm |
| C axis (spindle,resolution) | 15 ° |
| Thread drill diameter | 3 M |
| Back machining workpiece length max. | 85 mm |
| Tool-holder: | |
| Turning tools | 6 pce |
| Drilling tools | 4 pce |
| Spindle speeds (turning tools) | 8000 t/min |
| Power of driven tools | 0.9 kW |
| Counter-operation: | |
| number of tools | 4 |
| Rapid traverse: | 20 m/min |
| Cutting speed | 10000 mm/min |
| Voltage 50 Hz 3x | 400 Volt |
| Spindle motor | 2.2 / 3.7 kW |
| Power of back spindle | 0.5 kW |
| Air connect | 5 bar |
| Total power required | 6 kVA |
| Machine's weight about | 2000 kg |
| Overall dimensions machine: | |
| Length | 2207 mm |
| Width | 1080 mm |
| Height | 1700 mm |
| Various accessories: | |
| Bar feeder | |
| Manufacturer | LNS |
| Type | EXPRESS 320 S2 |
| year of manufacture | 2017 |
| Length of bars max. | 3200 mm |
| Bar diameter | 3 - 20 mm |
| Parts catcher | |
| Workpiece conveyor | |
| High pression colant device: | |
| Manufacturer | Müller |
| Type | CL2 |
| year of manufacture | 2018 |
| Maximum pressure | 70 bar |
| Coolant system | 145 l |
| Fire extinguishing system | SIEMENS |
