Speaking of the stability of the grease .We have to say Grease mechanical stability refers to the grease in mechanical shear force, the grease frame structure resistance from deformation to flow,that is to say, grease under extrusion, rotation, rolling and other external force grease thinning, lose adhesion leads to lubrication failure, grease mechanical stability is an important factor affecting grease service life, the grease mechanical stability mainly depends on the fiber structure and the adsorption between fiber, and the base oil is not very big.In real work to evaluate the mechanical stability of grease, our common detection methods are: grease shear stability measurement method, grease drum stability measurement method, bearing leakage measurement method。