Machining flexability of medium workpieces


Basic Data

The KRONOS M 400 combines precision and highest productivity in a single machine. Its modular design enables optimum adaptation to the respective grinding task, whether in throughfeed or plunge cut grinding.

Machine description

  • Working range 1.5...100 mm, plunge length up to 395 mm
  • Thermally stable, vibration-damping GRANITAN® machine base
  • High system rigidity thanks to grinding and regulating spindles supported on both sides and rigidly designed slide systems
  • Grinding spindles mounted on hydrodynamic bearings for max. 63 m/s (optional up to 120 m/s for CBN/diamond use)
  • Designed for mass production
  • High cost effectiveness thanks to reduced cycle times
  • Optionally extendable if application requirements change
  • Highest safety standard thanks to full enclosure

Possible technologies

  • Plunge grinding
  • Throughfeed grinding
  • Plunge grinding in mass production


Granitan® machine bed

The basis of the KRONOS M 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.

3-slide system

The 3-slide system of the KRONOS M comprises a swivel-type slide, an intermediate slide and an upper slide. The swivel-type slide forms the base for the guide system, on which the intermediate and upper slide are arranged compactly. This guarantees a high system rigidity of the machine.

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. The dressing times can be reduced to a minimum through the optional use of acoustic gap control for dressing detection.

Grinding spindle

The grinding wheel width is a maximum of 400 mm with a bore diameter of 304.8 mm. The roller-bearing grinding spindle is designed for the use of conventional grinding wheels. Optionally, spindles for the use of superabrasive cutting materials such as CBN or diamond can also be used.

Regulating spindle

The regulating spindle is also portal-mounted with high precision pre-tensioned spindle bearings. It is suitable for 400 mm wide regulating wheels. The drive is provided by a digital servo motor and transmission.

Control system

The KRONOS M 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 150 mm
Max. Travel Speed X 5.000 mm/min
Max. Travel Z 491 mm
Max. Travel Speed Z 5.000 mm/min

Spindle drive

Max. Spindle Power 51 kW
Max. Number Of Revolutions 4584 /min
Max. Grinding Wheel Diameter 610 mm
Max. Grinding Wheel Width 400 mm

Swiveling Axes

Swiveling Range A +3°/-6° °
Swiveling Range B +1°/-1° °
Swiveling Range C ∞ °

Workpiece Data

Workpiece Length 0 - 395 mm
Workpiece Diameter 4,5 - 100 mm
Max. Workpiece Weight 20 kg
Center Height 1.100 mm

Linear Axes

Max. Travel X 5,906 inch
Max. Travel Speed X 196,850 inch/min
Max. Travel Z 19,331 inch
Max. Travel Speed Z 196,850 inch/min

Spindle drive

Max. Spindle Power 68,392 hp
Max. Number Of Revolutions 4584 rpm
Max. Grinding Wheel Diameter 24,016 inch
Max. Grinding Wheel Width 15,748 inch

Swiveling Axes

Swiveling Range A +3°/-6° deg
Swiveling Range B +1°/-1° deg
Swiveling Range C ∞ deg

Workpiece Data

Workpiece Length 0 - 15,551 inch
Workpiece Diameter 0,177 - 3,397 inch
Max. Workpiece Weight 44,092 lbs
Center Height 43,307 inch
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Product brochure KRONOS M
pdf, 1 MB
Overview of the KRONOS series
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