Bearing grease performance indicators required by many, and primarily colloidal stability (of oil), mechanical stability (100,000 shear testing, extending the penetration value) and oxidation stability, the combined result of these 3 indicators, that is, the FAG bearings life.
In FAG bearing in the running of grease suffered machinery force of damage make heavy of agent of fiber variable fragmentation, and variable short, and reduced has maintain grease structure of capacity, that consistency changes, if consistency changes is Assembly produced from work surface loss of phenomenon, while in running work Shi grease will was temperature rise of effect, based oil will produced evaporation and reduced or part based oil due to fat of colloidal damage points oil loss make fat of with oil volume reduced, also has produced oxidation metamorphic of May.
Therefore, the FAG bearing grease, based at work when the oil content of less than-60% (that is, base oil losses due to evaporation or oil 30%-40%) will reduce the loss of ability to lubricate even lead bearing operation failed while declining fat thickness and oxidation and spoilage will still affect the bearing in operation.