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  2. Gear oil - Wikipedia

    en.wikipedia.org/wiki/Gear_oil

    While they take the same form, the viscosity grades for gear oils are on a different scale than the viscosity grades for an engine oil. The viscometrics for gear oils are standardized in SAE J306. Multigrade gear oils are becoming more common; while gear oil does not reach the temperatures of motor oil, it does warm up appreciably as the car is ...

  3. SAE J300 - Wikipedia

    en.wikipedia.org/wiki/SAE_J300

    The SAE has a separate viscosity rating system for gear, axle, and manual transmission oils, SAE J306, which should not be confused with engine oil viscosity. The higher numbers of a gear oil (e.g., 75W-140) does not mean that it has higher viscosity than an engine oil 20W-50.

  4. SAE J306 - Wikipedia

    en.wikipedia.org/wiki/SAE_J306

    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.

  5. Viscosity index - Wikipedia

    en.wikipedia.org/wiki/Viscosity_index

    The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature.

  6. NLGI consistency number - Wikipedia

    en.wikipedia.org/wiki/NLGI_consistency_number

    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 ...

  7. Lubricant - Wikipedia

    en.wikipedia.org/wiki/Lubricant

    Manufactured by solvent extraction, solvent or catalytic dewaxing, and hydro-finishing processes. Common Group I base oil are 150SN (solvent neutral), 500SN, and 150BS (brightstock) Group II – Saturates > 90% and sulfur < 0.03%, and SAE viscosity index of 80 to 120; Manufactured by hydrocracking and solvent or catalytic dewaxing processes.

  8. List of viscosities - Wikipedia

    en.wikipedia.org/wiki/List_of_viscosities

    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.

  9. SAE viscosity number - Wikipedia

    en.wikipedia.org/?title=SAE_viscosity_number&...

    Download as PDF; Printable version; In other projects ... Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia ... Retrieved from "https://en ...

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