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BS ISO 26422:2014

Current
Current

The latest, up-to-date edition.

Petroleum and related products. Determination of shear stability of lubricating oils containing polymers. Method using a tapered roller bearing
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-03-2015

Publisher

British Standards Institution

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation
8 Procedure
9 Referencing
10 Reporting of results
11 Precision
12 Test report
Bibliography

Describes a method of determining the shear stability of polymer-containing lubricating oils, including pressure fluids, by the four-ball tester as specified in ISO 20623, but using a tapered roller bearing.

This International Standard specifies a method of determining the shear stability of polymer-containing lubricating oils by the four-ball machine as specified in ISO20623, but using a tapered roller bearing. The test results allow prediction of the in-service permanent viscosity loss.

NOTE Other International Standards 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 ISO20844.[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 ISO20844 test method can be too low to generate a realistic permanent loss in viscosity of the fluid.

Committee
MCE/18/-/16
DevelopmentNote
Supersedes 14/30290161 DC. (04/2015)
DocumentType
Standard
Pages
20
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 26422:2014 Identical

DIN 51350-6:1996-08 TESTING OF LUBRICANTS - TESTING IN THE SHELL FOUR-BALL TESTER - PART 6: DETERMINATION OF SHEAR STABILITY OF LUBRICATING OILS CONTAINING POLYMERS
ISO 20844:2015 Petroleum and related products — Determination of the shear stability of polymer-containing oils using a diesel injector nozzle
ISO 20623:2003 Petroleum and related products Determination of the extreme-pressure and anti-wear properties of fluids Four ball method (European conditions)
ISO 355:2007 Rolling bearings Tapered roller bearings Boundary dimensions and series designations
ISO 4259:2006 Petroleum products Determination and application of precision data in relation to methods of test
ISO 3105:1994 Glass capillary kinematic viscometers — Specifications and operating instructions

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Hardcopy - English
PDF - English
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