For a lubricant to be beneficial, it must remain stable during use. For example, if equipment requires a certain viscosity to operate efficiently, the ability of the lubricant to maintain the desired viscosity is a measure of stability. Lubricants must remain shear resistant to be effective in lubricating and protecting equipment.
Shear stability refers to the ability of a lubricant to resist sliding. Usually, sores occur when a layer of fluid starts moving in a different direction than other layers of the same fluid. For more information about rose gold shears, you can see it here.
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For example, if two components are separated by a lubricant such as a piston and a cylinder, the lubricant film part naturally moves towards the piston. The lubricant layer in contact with the cylinder begins to separate from the lubricant layer in contact with the piston.
This is known as an intersection. The resulting shear can reduce the viscosity of the lubricant; Loss of fluid viscosity can occur under conditions known as permanent or temporary shear.
Temporary shear occurs when the molecules that increase the viscosity index are oriented in the direction of the voltage or current. This arrangement reduces drag and allows the viscosity of the fluid to be reduced.
Constant shear occurs when shear stress breaks down long molecules and converts them into shorter, lighter molecules. The shortened, lighter molecules provide less drag, which minimizes their ability to maintain viscosity.