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Mikrosa Kronos S 250 CNC Centreless Grinding MachineHigh Performance meets Precision

The Mikrosa KRONOS S 250 CNC Centreless Grinding Machine is designed for plunge cut and throughfeed grinding of workpieces in the diameter range of 1.5mm up to 35mm and with a plunge cut width up to 245 mm. The perfect machine for the mass production of small precision workpieces.




  • Working range 1.5 to 35mm, plunge length up to 245mm
  • Highest values in cycle time and cost effectiveness
  • Short work-piece set-up and changeover times
  • Thermally stable, vibration-damping GRANITAN® machine bed
  • Cross-slide systems for grinding and regulating wheels
  • Grinding spindles mounted on hybrid bearings for maximum 120 m/s
  • Exact reproducibility of grinding results, even in tolerance ranges of ±0.5 µm
  • Designed for mass production
  • Highest safety standard thanks to the full machine enclosure
  • Maintenance and service friendly Siemens Sinumeric 840D sl control system

Possible technologies:

  • Plunge cut grinding
  • Throughfeed grinding
  • 6° inclined plunge cut grinding
  • Plunge cut grinding in mass production
  • Oscillation grinding
  • Grinding of multiple operations in one cycle by offsetting the workpiece or grinding spindle


Technical Specification:

Work-piece Diameter mm 1.5 - 35
Infeed grinding workpiece length max. mm 245
Grinding Wheel diameter max. mm 450
Grinding Wheel width max. mm 250
Peripheral speed (optional CBN) m/sec 80 (120 / 150)
Grinding wheel drive power max. kW 11 / 15
Regulating Wheel diameter max. mm 250
Regulating Wheel width max. mm 250
rpm range, infinitely variable rpm 5 - 500 
Driving Power kW 5
CNC Control   Siemens Sinumeric 840D sl


If you would like more information on any of the machines in the Mikrosa Centreless Grinding Machine Range then please contact us. You can also download brochures by following the link below.

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