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Definition: Refers to the ability of grease’s structural system to resist deformation and flow under mechanical shear forces.
① Mechanical stability is an important performance characteristic of grease and a key factor affecting its service life.
② The mechanical stability of grease mainly depends on the type of thickener and the preparation process.
③ Methods for analyzing the mechanical stability of grease include shear stability testing, roll stability testing, and grease leakage testing for automobile wheel bearings.
Ø Test Standards:
Ø Method 1: GB/T 269 “Test Method for Shear Stability of Grease”, Equivalent Method: ISO 2137-1985;
Ø Method 2: SH/T 0122 “Test Method for Roll Stability of Grease”, Equivalent Method: ASTM-D1831
