Comparison of different standard test methods for the evaluation of greases for rolling bearings under small oscillating movements

<pe:p>Rolling bearings that are often only operated at small oscillation angles or that are exposed to vibrations when stationary can show typical damage after only a short period of operation. This can be classic false brinelling damage, so-called standstill marks or fretting damage. For lubricant developers and lubricant users it is essential that laboratory test methods are available which allow a statement to be made on the suitability of a lubricant for the respective practical application. This publication explains the scientific basis for these special operating and test conditions and compares the test results of sample greases in these three standard rolling bearing tests and in a classic Fretting test under oscillating sliding friction.</pe:p>