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STUDER S 21 lean CNC is a CNC cylindrical grinder offering high precision, exceptional accuracy and reliable performance. Centre height 125 mm, distance between centres 400 mm, max workpiece 30 kg; grinding wheels Ø400×40 mm (L/R); B axis -15/+195° resolution 1°; peripheral wheel speed 35 m/s; cross travel 254 mm; longitudinal travel 483 mm; feed 0.001–5000 mm/min; table speed 0.001–10000 mm/min; work spindle stepless 1–1500 t/min, spindle hole 26 mm, taper MT/CM 4. Grinding spindle motor 3 kW; total power 20 kVA; 3x400 V 50 Hz; weight ~4300 kg; dims 2300×2000×2100 mm. Equipment: coolant system, magnetic separator, paper filtration, MARPOSS touch probe, MOVOMATIC CR257 measuring device, internal grinding attachment, 1 spindle, wheel speeds up to 60000 t/min, set of flanges, balancing support, lamp, CNC redressing cycle, hydraulic dresser, tailstock fine adjust, SENSITRON feed, FIBARON oil mist extractor. Delivers tight tolerances; typical sectors: automotive, watchmaking, toolmaking, aerospace, medical.
| Centre height | 125 mm |
| Distance between centres | 400 mm |
| Workpiece weight on centres max. | 30 kg |
| Grinding weehl left side: | |
| Diameter | 400 mm |
| Width | 40 mm |
| Grinding wheel right side: | |
| Diameter | 400 mm |
| Width | 40 mm |
| B axis resolution max. | 1 ° |
| B axis swivelling range | -15 / +195 ° |
| Grinding wheel speeds: | |
| Peripheral speed | 35 m/s |
| Cross travel CNC | 254 mm |
| Feed speed up | 0.001-5000 mm/min |
| Longitudinal slide: | |
| Max. travel | 483 mm |
| Work piece spindle head: | |
| stepless | |
| from | 1 t/min |
| up to | 1500 t/min |
| Spindle hole | 26 mm |
| taper in spindle: MT | 4 |
| Tailstock: | |
| Taper in tailstock: | 3 CM |
| Table speed: | |
| from | 0.001-10000 mm/min |
| Voltage 50 Hz 3x | 400 Volt |
| Grinding spindle motor | 3 kW |
| Total power required | 20 kVA |
| Machine's weight about | 4300 kg |
| Overall dimensions machine: | |
| Length | 2300 mm |
| Width | 2000 mm |
| Height | 2100 mm |
| Various accessories: | |
| Coolant system | |
| Magnetic separator | |
| Paper filtration system | |
| Touch probe MARPOSS | |
| Measuring device | MOVOMATIC CR257 |
| Internal grinding attachment: | |
| Number of spindles | 1 |
| Grinding wheel speeds: | |
| up to | 60000 t/min |
| Set of flanges | |
| Balancing support | |
| Lamp | |
| CNC cycle redressing unit | |
| Redressing attachment hydraulic | |
| Tailstock with fine adjustement | |
| Feed SENSITRON | |
| Oil mist extractor | FIBARON |
