Grease specific terminology

Core Tip: Age hardening: The increase in the consistency of the grease with storage time. Appearance: The grease characteristics seen only by visual inspection, usually including the overall appearance and texture
Age hardening: The phenomenon that the consistency of the grease increases with storage time.
Appearance: The grease characteristics seen only by visual inspection, usually including the overall appearance, texture, color and gloss.
Overall appearance: smooth, rough, granular, oily, etc.
Texture: creamy, elastic, brushed.
Color: red, blue, yellow, white, etc., plus the restrictions adjectives "light", "medium", "deep" and so on.
Gloss: bright, dull, etc.
Consistency: Consistency refers to the extent to which a plastic material resists deformation under the action of an external force.
Cone penetration: Cone penetration is a measure of grease consistency. The greater the penetration, the softer the fat.
Consistency grade: NLGI (American Grease Association) is divided into nine grades, from nine to six.
Mechanical stability: The ability of grease to resist changes in consistency when mechanically sheared. The smaller the change in consistency, the better the mechanical stability.
Thixotropy: When the grease is sheared, the consistency becomes small, and when the shear is stopped, the consistency is increased.
Water resistance: The ability of the grease to resist rinsing from the bearing, the ability to resist damage to the structure of the grease by absorbing moisture, and the ability to prevent corrosion of the metal surface in the presence of water.
Colloidal stability: The ability of grease to resist oil separation.
Similar viscosity: Generally, the viscosity of a grease becomes smaller as the shear rate increases, so the viscosity of a grease is called a similar viscosity or an apparent viscosity.https://www.supplyforever.com/