Calotester kaloMAX NT II  Download Brochers

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Ball cratering test device for the determination of wear coefficients and layer thicknesses 

Quality assurance of coatings needs expressive test procedures, which allow quick and reliable valuation of the coating quality. 

The Calotest device kaloMAX NT II has been developed in co-operation with the Fraunhofer Institut for Surface Engineering and Thin Films (IST) especially for the characterization of hard coatings. The method is usable for thin coatings (1 µm) as well as for the materials or lacquers. The procedure supplies a material characteristic which enables a function-oriented evaluation of the coating quality. 

Methodology of abrasion testing by wear craters

• Grinding-in the wear crater into the coating 
• Determination of the diameter by microscope 
• Calculation of the wear coefficient from normal force, sliding distance and volume of the wear crater 

Advantages

• Test takes only a few minutes 
• Test parameters optimized for measuring hard coatings are available 
• High reproducibility and accuracy by means of a special abrasive slurry 
• High accuracy in grinding of the wear crater 
• Useable for plane and curved parts 
• Exact determination of coating thickness without calibration even for multilayered coatings 
• Easy positioning by cross table