Kronos S 250 High Performance Meets Precision


Kronos S 250 High Performance Meets Precision


Precision and productivity - The KRONOS S 250 is synonymous with leading accuracies in centerless grinding of small workpieces with plunge cut lengths up to 250 mm.

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

Machine description:

  • Working range 1.5...35 mm, plunge cut length up to 245 mm
  • Highest values in cycle time and cost effectiveness
  • Short 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 max. 150 m/s
  • Exact reproducibility of grinding results, even in tolerance ranges of ±0.5 µm
  • Designed for mass production
  • Highest safety standard thanks to full enclosure 
  • Maintenance and service friendly SIEMENS SINUMERIK 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


Workpiece diameter: 1.5-35 mm

In-feed grinding workpiece length max.: 245 mm

Grinding wheel   
Diameter:  max. 400 mm

Width: max. 250mm

Peripheral speed:  80 (120/150)

Driving power 11/15 KW

Regulating wheel
Diameter, max. : 250mm
Width, max.: 250mm
rpm range, infinitely variable 5-500 rpm
Driving power: 5Kw

SINUMERIK 840D sl control system

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