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The longer it takes, the higher the viscosity and thus the higher the SAE code. Larger numbers are thicker. J300 specifies a viscosity range for each non-winter grade, with higher grade numbers corresponding to higher viscosities. In addition, a minimum viscosity measured at a high temperature and high-shear rate (HTHS, ASTM D4683) is also ...
That is, the two oils with viscosity Y at 100 °C and a VI of 0 and 100 would have at 40 °C the viscosities of L and H respectively. These L and H values can be found in tables in ASTM D2270 [4] and are incorporated in online calculators. [5]
Consequently, if a liquid has dynamic viscosity of n centiPoise, and its density is not too different from that of water, then its kinematic viscosity is around n centiStokes. For gas, the dynamic viscosity is usually in the range of 10 to 20 microPascal-seconds, or 0.01 to 0.02 centiPoise. The density is usually on the order of 0.5 to 5 kg/m^3.
The proportionality factor is the dynamic viscosity of the fluid, often simply referred to as the viscosity. It is denoted by the Greek letter mu ( μ ). The dynamic viscosity has the dimensions ( m a s s / l e n g t h ) / t i m e {\displaystyle \mathrm {(mass/length)/time} } , therefore resulting in the SI units and the derived units :
The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics known as SAE J300. This standard is commonly used throughout the world, and standards organizations that do so include API [ 16 ] and ACEA . [ 17 ]
SAE J306 is a standard that defines the viscometric properties of automotive gear oils. It is maintained by SAE International . [ 1 ] Key parameters for this standard are the kinematic viscosity of the gear oil, the maximum temperature at which the oil has a viscosity of 150,000 cP , and a measure of its shear stability through the KRL test.
Try a bird of a different feather this year, and serve this festive and impressive fruit and cheese display as the centerpiece of your holiday app table. Get the Turkuterie recipe . PHOTO: RYAN ...
Common greases are in the range 1 through 3. Those with a NLGI No. of 000 to 1 are used in low viscosity applications. Examples include enclosed gear drives operating at low speeds and open gearing. Grades 0, 1 and 2 are used in highly loaded gearing. Grades 1 through 4 are often used in rolling contact bearings. Greases with a higher number ...