Used MIKROSA KRONOS M 400 CNC Centerless Grinder

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Product Highlight

Used MIKROSA KRONOS M 400 is a German-built CNC centerless grinder developed for precision and high-volume cylindrical grinding. With six CNC-controlled axes, closed-loop scale feedback, a rigid GRANITAN® machine base, a 610 × 400 mm grinding wheel and up to 395 mm infeed grinding length, it is well suited for automotive, bearing, hydraulic, shaft and other precision component production.

Product Description

Used MIKROSA KRONOS M 400 CNC centerless grinding machine, manufactured in Germany for high-precision and high-volume cylindrical component production. This machine features 6 CNC-controlled axes, full closed-loop scale feedback, a vibration-damping GRANITAN® machine base, and a configured grinding diameter range of 3–100 mm. Suitable for both precision infeed grinding and high-productivity centerless grinding applications.

The KRONOS M 400 platform was developed for both throughfeed and plunge/infeed centerless grinding of medium-size workpieces. Its modular construction and rigid machine architecture make it suitable for demanding production environments.

Technical Specifications

Parameter	Specification
Condition	Used / Pre-owned
Brand	MIKROSA
Manufacturer	SCHAUDT MIKROSA GmbH
Model	KRONOS M 400
Machine Type	CNC Centerless External Cylindrical Grinding Machine
Country of Origin	Germany
Manufacturing Location	Leipzig, Germany
Year of Manufacture	2015
Order Number	39154009
CNC Axes	6 CNC-controlled axes
Identified Axes	X1, X2, X4, Z2; complete axis assignment to be confirmed
Feedback System	Full closed-loop linear scale feedback
Machine Base	GRANITAN® vibration-damping machine base
Configured Grinding Diameter	3–100 mm
OEM Platform Grinding Range	1.5–100 mm
Maximum Infeed Grinding Length	395 mm
Programmable Minimum Infeed	0.0001 mm, based on supplied machine information
Stated Workpiece Roundness	Less than 0.0005 mm, subject to process and verification conditions
Grinding Wheel	610 × 400 × 304.8 mm
Minimum Usable Grinding Wheel Diameter	460 mm, based on supplied machine information
Grinding Wheel Peripheral Speed	63 m/s
Optional CBN Peripheral Speed	Up to 90/120 m/s
Grinding Wheel Drive Power	37/51 kW
Regulating Wheel	350 × 400 mm
Regulating Wheel Bore	127 / 152 mm standard platform specification
Regulating Wheel Speed	5–450 rpm, infinitely variable
Regulating Wheel Drive	5.7 kW
Maximum Overall Height	Approx. 2,300 mm
Machine Weight	Approx. 11 tons
Grinding Processes	Infeed / plunge grinding and throughfeed grinding

The OEM KRONOS M 400 technical documentation confirms a 610 mm grinding wheel, 350 mm regulating wheel, 395 mm maximum infeed length, 63 m/s grinding-wheel speed and approximately 11-ton machine weight.

Available Acceptance-Test Data

The supplied factory acceptance records provide additional technical evidence for this specific machine. Recorded values include X1 small-travel positioning deviation of approximately 0.0006 mm, control-wheel spindle taper runout readings around 0.001 mm, grinding-spindle taper runout readings around 0.001–0.002 mm, and grinding-spindle axial play around 0.003 mm.

Applications & Suitable Production Scenarios

Used MIKROSA KRONOS M 400 centerless grinder is designed for manufacturers that need consistent cylindrical grinding accuracy together with high production capacity. The platform supports both throughfeed and infeed grinding, making it suitable for continuous mass production as well as components requiring controlled plunge grinding.

Typical applications include bearing rollers and cylindrical bearing parts, automotive transmission components, precision shafts and pins, hydraulic and pneumatic valve spools, motor and rotor shafts, fuel-system components, hardened-steel components, tool blanks and carbide rods, precision mechanical parts, and other rotationally symmetrical components requiring tight diameter and roundness control.

For automotive, bearing, hydraulic, motor, transmission and precision-component manufacturers, a used German CNC centerless grinder such as the KRONOS M 400 can also provide a lower capital-investment alternative to purchasing a comparable new production grinding system.

FAQ

What diameter parts can this KRONOS M 400 grind?

The supplied configuration indicates a grinding diameter range of approximately 3–100 mm. The original KRONOS M 400 platform specification covers workpiece diameters from 1.5 to 100 mm, so the actual minimum diameter depends on the installed tooling, work-rest blade, grinding setup and production application.

Can this machine perform both throughfeed and plunge grinding?

Yes. The KRONOS M 400 platform was designed for both throughfeed centerless grinding and infeed/plunge grinding. Maximum OEM-specified workpiece length for infeed grinding is 395 mm.

Is the MIKROSA KRONOS M 400 suitable for mass production?

Yes. It is a production-oriented CNC centerless grinder intended for precision and high-throughput cylindrical grinding. Its rigid GRANITAN® machine base, CNC-controlled movements and wide grinding wheel are particularly useful for repetitive industrial production.