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STUDER S 31 LEAN CNC
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STUDER S 31 LEAN CNC is a CNC cylindrical grinder engineered for precision, high accuracy and reliability. Centre height 175 mm, distance between centres 650 mm, max workpiece 80 kg; grinding wheel Ø500×63 mm, bore 203 mm, turret 2+1. Travels: longitudinal 800 mm, transverse 254 mm; work spindle 1–1000 rpm (rotatable -15/+195°), taper MT4; grinding spindle motor 7.5 kW, supply 3×380 V 50 Hz, total power 32 kVA; machine ~5200 kg, footprint 3000×2200×2100 mm. Equipment: MARPOSS touch probe, internal grinding attachment, RS-232. Achieves tight tolerances; typical applications: automotive, aerospace, machine tools, medical.
Technical specifications are subject to change without notice
| Centre height | 175 mm |
| Distance between centres | 650 mm |
| Workpiece weight on centres max. | 80 kg |
| Grinding wheel right and left hand | |
| Grinding wheel: | |
| Diameter | 500 mm |
| Width | 63 mm |
| Bore | 203 mm |
| Turret grinding tool holder for ext. and int. | 2+1 |
| Grinding wheel speeds: | |
| from | 1400 t/min |
| up to | 3200 t/min |
| Rotatable grinding spindle head (b-axis) | 1 ° |
| Peripheral speed | 50 m/s |
| Longitudinal slide: | |
| Max. travel | 800 mm |
| Transversal slide: | |
| Max. travel | 254 mm |
| Work piece spindle head: | |
| speeds: | |
| from | 1 t/min |
| up to | 1000 t/min |
| Typing speed | 30 t/min |
| rotatable | -15 / + 195 ° |
| taper in spindle: MT | 4 |
| Required power | 3 kW |
| Tailstock: | |
| con regolazione micrometrica | |
| Taper in tailstock: | 3 CM |
| Spindle stroke | 35 mm |
| Spindle diameter | 50 mm |
| Air connect | 5 - 7 bar |
| Voltage 50 Hz 3x | 380 Volt |
| Grinding spindle motor | 7.5 kW |
| Total power required | 32 kVA |
| Machine's weight about | 5200 kg |
| Overall dimensions machine: | |
| Length | 3000 mm |
| Width | 2200 mm |
| Height | 2100 mm |
| Various accessories: | |
| Touch probe MARPOSS | |
| Internal grinding attachment: | |
| Number of spindles | 1 |
| Grinding wheel speeds: | |
| up to | 30000 t/min |
| Lamp | |
| RS-232 Interface | |
| Notes: | |
| Machine refurbished | 2026 |
