ASTM D566 - 16

    Standard Test Method for Dropping Point of Lubricating Grease

    Active Standard ASTM D566 | Developed by Subcommittee: D02.G0.03

    Book of Standards Volume: 05.01


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    Significance and Use

    5.1 In general, the dropping point is the temperature at which the grease passes from a semisolid to a liquid state under the conditions of test. This change in state is typical of greases containing as thickeners soaps of conventional types. Greases containing as thickeners materials other than conventional soaps can, without change in state, separate oil. This test method is useful to assist in identifying the grease as to type and for establishing and maintaining bench marks for quality control. The results are considered to have only limited significance with respect to service performance as dropping point is a static test.

    Note 1: Cooperative testing indicates that in general, dropping points by Test Method D5663 and Test Method D2265 are in agreement. In cases where results differ, there is no known significance. However, agreement between producer and consumer as to the test method used is advisable.

    1. Scope

    1.1 This test method covers the determination of the dropping point of lubricating grease.

    1.2 This test method is not recommended for use at bath temperatures above 288 °C. For higher temperatures Test Method D2265 should be used.

    1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.4 WARNING—This test method uses mercury-filled thermometers. Mercury has been designated by many regulatory agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for details and EPA’s website— http://www.epa.gov/mercury/faq.htm—for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. The responsible subcommittee, D02.G.3, continues to explore alternatives to eventually replace the mercury thermometers.

    1.5 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see 6.4 and 8.1.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D217 Test Methods for Cone Penetration of Lubricating Grease

    D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

    D2265 Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range

    E1 Specification for ASTM Liquid-in-Glass Thermometers


    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 15121902(Grease)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D0566-16

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D566-16, Standard Test Method for Dropping Point of Lubricating Grease, ASTM International, West Conshohocken, PA, 2016, www.astm.org

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