Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method)
|Publication Date:||1 May 2020|
|ICS Code (Lubricants, industrial oils and related products):||75.100|
This test method covers the determination of the loadcarrying properties of lubricating greases. Three determinations are made:
Load-Wear Index (formerly called Mean-Hertz Load),
Weld Point, by means of the Four-Ball Extreme- Pressure (EP) Tester, and
Last nonseizure load (LNSL).
The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
*A Summary of Changes section appears at the end of this standard