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Significance and Use
This test method can be used to quickly determine the lubricating ability of greases lubricating automotive plastic socket suspension joints. This test method has found wide application in qualifying greases used in chassis systems. This test method is a material and application oriented approach based on inputs from field experiences for characterizing the tribological behavior (friction and wear) using random, discrete, and constant parameter combinations. Users of this test method should determine whether results correlate with field performance or other applications prior to commercialization.
1.1 This test method covers a procedure for determining the friction and wear behavior of grease lubricated plastic socket suspension joints, for validation of suspension joint greases and quality inspection for those greases under high-frequency linear-oscillation motion using the SRV test machine.
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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A295 Specification for High-Carbon Anti-Friction Bearing Steel
D217 Test Methods for Cone Penetration of Lubricating Grease
D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants
D5706 Test Method for Determining Extreme Pressure Properties of Lubricating Greases Using a High-Frequency, Linear-Oscillation (SRV) Test Machine
E45 Test Methods for Determining the Inclusion Content of Steel
G40 Terminology Relating to Wear and Erosion
DIN StandardsDIN EN ISO 13565-2:1998 Geometrical Product Specifications (GPS) - Surface texture: Profile method - Surfaces having stratified functional properties - Part 2: Height characterization using the linear material ratio curve
ICS Number Code 21.080 (Hinges, eyelets and other articulated joints); 21.260 (Lubrication systems)
UNSPSC Code 15121902(Grease)
ASTM D7420-11, Standard Test Method for Determining Tribomechanical Properties of Grease Lubricated Plastic Socket Suspension Joints Using a High-Frequency, Linear-Oscillation (SRV) Test Machine, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top