ISO 26422:2014

Petroleum and related products — Determination of shear stability of lubricating oils containing polymers — Method using a tapered roller bearing

Standard Details

ISO 26422:2014 specifies a method of determining the shear stability of polymer-containing lubricating oils by the four-ball machine as specified in ISO 20623, but using a tapered roller bearing. The test results allow prediction of the in-service permanent viscosity loss.

NOTE Other International StandardDetails exist which evaluate viscosity loss of polymer-containing oils. The method specified within this International Standard subjects fluids to a higher shear rate than, for example, the diesel injector nozzle shear test described within ISO 20844.[3] It is particularly appropriate for lubricants being used in high shear applications, such as components with gears and roller bearings. In such applications, the shear rate in the ISO 20844 test method can be too low to generate a realistic permanent loss in viscosity of the fluid.

General Information

Status : Published

Standard Type: Main

Document No: ISO 26422:2014

Document Year: 2014

Pages: 10

Edition: 2

Section Volume:
ISO/TC 28. Petroleum and related products, fuels and lubricants from natural or synthetic sources

ICS:
75.100 Lubricants, industrial oils and related products

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ISO 26422:2014

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ISO 26422:2011

ISO 26422:2014

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