ASTM D8227 - 18

    Standard Test Method for Determining the Coefficient of Friction of Synchronizer Lubricated by Mechanical Transmission Fluids (MTF) Using a High-Frequency, Linear-Oscillation (SRV) Test Machine

    Active Standard ASTM D8227 | Developed by Subcommittee: D02.L0.07

    Book of Standards Volume: 05.05


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    Significance and Use

    5.1 This test method can be used to quickly determine the lubricating ability of fully-formulated lubricants used as mechanical transmission fluids (MTF) to display a frictional behavior against materials used in synchronizers of mechanical gears in automotive vehicles. This test method has found to be complementary to bench tests (for example, Test Method D5579 and CEC L-66-99) by using the present test conditions. This test method is a material and application oriented approach based on inputs from field experiences for characterizing the frictional behavior (coefficient of friction (cof)) using random, discrete, and constant parameter combinations as seen in field experiences. Users of this test method should determine whether results correlate with field performance or other applications prior to commercialization.

    1. Scope

    1.1 This test method covers a procedure for determining the coefficient of friction of lubricants (fluids) tribologically interacting with materials used in synchronizers in mechanical transmission (MT) gears under high-frequency linear-oscillation motion using the SRV test machine. A flat areal contact geometry is applied.

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

    1.3 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.

    1.4 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.


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

    Other Standards

    CEC L-66-99 Evaluation of synchronizer loading parameters and their ability to predict failure Available from Coordinating European Council (CEC), Services provided by Kellen Europe, Avenue Jules Bordet 142 - 1140, Brussels, Belgium, http://www.cectests.org.

    DIN 51631 Special-boiling-point spiritsRequirements and testing Available from Beuth Verlag GmbH (DIN Deutsches Institut fr Normung e.V.), Burggrafenstrasse 6, 10787 Berlin, Germany, http://www.en.din.de

    DIN EN 17022–3 Heat treatment of ferrous materials; heat treatment methods; case hardening

    DIN EN ISO 13565-2 Geometrical Product Specifications (GPS)Surface texture: Profile methodSurfaces having stratified functional propertiesPart 2: Height characterization using linear material ratio curve

    GB/T 3077-2015 Alloy structural steel Available from Standardization Administration of China, No. 9 Madian Donglu, Haidian District, Beijing 100088, P.R. China.

    TL-VW084 (1993)

    ASTM Standards

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

    D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants

    D5579 Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test

    D5706 Test Method for Determining Extreme Pressure Properties of Lubricating Greases Using a High-Frequency, Linear-Oscillation (SRV) Test Machine

    D7421 Test Method for Determining Extreme Pressure Properties of Lubricating Oils Using High-Frequency, Linear-Oscillation (SRV) Test Machine

    G40 Terminology Relating to Wear and Erosion


    ICS Code

    ICS Number Code 21.260 (Lubrication systems)

    Referencing This Standard
    Link Here
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    DOI: 10.1520/D8227-18

    Citation Format

    ASTM D8227-18, Standard Test Method for Determining the Coefficient of Friction of Synchronizer Lubricated by Mechanical Transmission Fluids (MTF) Using a High-Frequency, Linear-Oscillation (SRV) Test Machine, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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