The present invention provides a
grease composition for automobile wheel hub bearings and its preparation method; the
grease composition includes 84-89% of
base oil, 10-54% of a thickener, 0.5% of an
antioxidant and 0.5% of a
tackifier; and 0.03% of a
metal deactivator which is calculated by taking the total amount of the above components as 100%, is added. According to the
grease composition and its preparation method, by adjusting the grease formulation and process, an optimum complex
soap fiber structure is obtained, so that the shape and size of
soap fiber and acting force among the
soap fiber are proper, the grease has good capability to control the bearing temperature rise, the grease has the advantages of excellent high temperature loss resistance, good
metal surface adhesion,
lubrication and seal performances and the like, and also has good capability to control the temperature rise, the high temperature
softening loss and early
lubrication failure problems caused by the design and use characteristics can be alleviated, and the grease has the multi-effect and general characteristics of common complex soap base greases, and can better meet the requirements of the automotive wheel hub bearings on
lubrication.