Precision for small workpieces


Basic Data

The KRONOS S 125 offers maximum precision for small workpieces. The compact, versatile centerless grinding machine combines speed with top quality.

Machine description

  • Working range 0.5...30 mm, plunge length up to 120 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. 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 full enclosure

Possible technologies

  • Plunge cut grinding - straight or 15° inclined
  • Plunge cut grinding in single or mass production
  • Plunge grinding in several simultaneous or consecutive operations, by offsetting the workpiece or the grinding wheel
  • Oscillation grinding
  • Throughfeed grinding


Granitan® machine bed

The basis of the KRONOS S is the proven Granitan® machine base with excellent damping characteristics. High thermal stability ensures temporary temperature fluctuations are extensively compensated and a high capacity to hold the tolerance can be guaranteed throughout the day.

Cross slide system

The KRONOS S 125 has a fixed grinding zone. All infeed and compensation movements are conducted by the cross slide system on the grinding wheel side (X1-axis / Z2-axis) and the cross slide system on the regulating wheel side (X4-axis / Z3-axis).

Modular dressing system

Depending on the grinding task, stationary dressing tools such as diamond blades and single-point diamonds or rotating dressing tools such as diamond dressing discs or diamond profile rolls are available. Dressing of the regulating and grinding wheel occurs in the center of the machine on the workpiece plane. This way highest accuracies are achieved.

Grinding spindle

The grinding wheel width is a maximum of 125 mm with a bore diameter of 203.2 mm. The grinding spindle mounted on hybrid bearings is suitable for use with conventional grinding wheels as well as superabrasive cutting materials such as CBN or diamond.

Regulating spindle

The regulating spindle is portal-mounted with high precision pre-tensioned spindle bearings. The regulating spindle allows for the use of 125 mm wide regulating wheels. The drive is a digital servo motor and V-ribbed belt driven by a clutch, free of lateral forces.

Control system

The KRONOS S comes with a SIEMENS SINUMERIK 840D sl control system as standard. MIKROSA has integrated a special operator interface for centerless grinding into the SIEMENS interface. The added symbols and icons are easy to understand and make programming even easier.

Hardware / Software
  • Maintenance and service friendly SIEMENS Sinumeric 840D sl control system
  • Heureeka - special MIKROSA softwarefor optimizing the grinding zone geometry
Technical Data
kg / cm
lb / inches

Linear Axes

Max. Travel X 200 mm
Max. Travel Speed X 5.000 mm/min
Max. Travel Z 256 mm
Max. Travel Speed Z 5.000 mm/min

Spindle drive

Max. Spindle Power 15 kW
Max. Number Of Revolutions 5.730 /min
Max. Grinding Wheel Diameter 400 mm
Max. Grinding Wheel Width 125 mm

Swiveling Axes

Swiveling Range A 10 °
Swiveling Range C ∞ °

Workpiece Data

Workpiece Length 0 - 120 mm
Workpiece Diameter 0,5 - 30 mm
Max. Workpiece Weight 1 kg
Center Height 1.100 mm

Linear Axes

Max. Travel X 7,874 inch
Max. Travel Speed X 196,850 inch/min
Max. Travel Z 10,433 inch
Max. Travel Speed Z 196,850 inch/min

Spindle drive

Max. Spindle Power 20,115 hp
Max. Number Of Revolutions 5.730 rpm
Max. Grinding Wheel Diameter 15,748 inch
Max. Grinding Wheel Width 4,921 inch

Swiveling Axes

Swiveling Range A 10 deg
Swiveling Range C ∞ deg

Workpiece Data

Workpiece Length 0 - 4,724 inch
Workpiece Diameter 0,020 - 1,181 inch
Max. Workpiece Weight 1,543 lbs
Center Height 43,307 inch
pdf, 2 MB
Product brochure KRONOS S
pdf, 1 MB
Overview of the KRONOS series
Angular plunge-cut grinding centerless: Turbocharger
Global Group
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