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STUDER S 40 CNC is a CNC cylindrical grinder of high precision, engineered for exceptional accuracy and reliability. Centre height 175 mm, distance between centres 1000 mm, workpiece weight on centres max 130 kg; grinding wheels Ø400×80 mm (bore 127). Longitudinal travel 1050 mm, transversal travel 275 mm; workpiece spindle 30–750 t/min (rotatable 90°). B‑axis 15°+205° (max increments 5°); wheel speeds up to 1670/2110 t/min, peripheral speed 35 m/s. Spindle motor 8 kW, wheel motor 1 kW, total power 30 kVA, supply 3x400 V 50 Hz; machine wt ~5100 kg, footprint 3750×1200×2300 mm. Equipment: internal grinding attachment, 1 high‑speed spindle up to 60000 t/min, lamp, tailstock fine adjust, electronic handheld control. Delivers very tight tolerances; ideal for automotive, aerospace, medical, watchmaking and machine tool industries.
Technical specifications are subject to change without notice
| Centre height | 175 mm |
| Distance between centres | 1000 mm |
| Workpiece weight on centres max. | 130 kg |
| Workpiece dimensions: | |
| Grinding weehl left side: | |
| Diameter | 400 mm |
| Width | 80 mm |
| Bore | 127 mm |
| Grinding wheel right side: | |
| Diameter | 400 mm |
| Width | 80 mm |
| Bore | 127 mm |
| B axis resolution max. | 5 ° |
| B axis swivelling range (automatic) | 15° + 205 ° |
| Grinding wheel speeds: | |
| number (steps) | 2 |
| up to | 1670 / 2110 t/min |
| Revolving unit with Hirth serration | |
| Rotatable grinding spindle head (b-axis) | 5 ° |
| Peripheral speed | 35 m/s |
| Longitudinal slide: | |
| Max. travel | 1050 mm |
| Resolution | mm |
| Feed speed up | 0.0001 - 10000 mm/min |
| Transversal slide: | |
| Max. travel | 275 mm |
| Resolution | mm |
| Feed speed up | 0.0001 - 10000 mm/min |
| Work piece spindle head: | |
| speeds: | |
| from | 30 t/min |
| up to | 750 t/min |
| rotatable | 90 ° |
| taper in spindle: MT | 5 |
| Required power | 1 kW |
| Tailstock: | |
| Hydraulic return | |
| Taper in tailstock: | 3 CM |
| Tailstock travel of barrel | 35 mm |
| Max. table angular displacement | 8.5 ° |
| Air connect | 5 bar |
| Voltage 50 Hz 3x | 400 Volt |
| Workpiece spindle motor | 8 kW |
| Total power required | 30 kVA |
| Machine's weight about | 5100 kg |
| Overall dimensions machine: | |
| Length | 3750 mm |
| Width | 1200 mm |
| Height | 2300 mm |
| Various accessories: | |
| Internal grinding attachment: | |
| Number of spindles | 1 |
| up to | 60000 t/min |
| Lamp | |
| Tailstock with fine adjustement | |
| Electronic hand held control |
