ASTM D5706-97

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
ASTM International (www.astm.org) for the latest information.
Designation: D 5706 – 97 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Determining Extreme Pressure Properties of Lubricating
Greases Using A High-Frequency, Linear-Oscillation (SRV)
1
Test Machine
This standard is issued under the fixed designation D 5706; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 coeffıcient of friction, μ or f, n—in tribology, the
dimensionless ratio of the friction force (F) between two
1.1 This test method covers a procedure for determining
bodies to the normal force (N) pressing these bodies together.
extreme pressure properties of lubricating greases under high-
G40
frequency linear-oscillation motion using the SRV test ma-
3.1.3 Hertzian contact area, n—the apparent area of contact
chine. This test method can also be used for evaluating extreme
between two nonconforming solid bodies pressed against each
pressure properties of lubricating fluid.
other, as calculated from Hertz’ equations of elastic deforma-
1.2 The values stated in SI units are to be regarded as the
tion. G40
standard. The values given in parentheses are for information
3.1.4 Hertzian contact pressure, n—the magnitude of the
only.
pressure at any specified location in a Hertzian contact area, as
1.3 This standard does not purport to address all of the
calculated from Hertz’ equations of elastic deformation. G40
safety concerns, if any, associated with its use. It is the
3.1.5 lubricant, n—any material interposed between two
responsibility of the user of this standard to establish appro-
surfaces that reduces the friction or wear, or both, between
priate safety and health practices and determine the applica-
them. D 4175
bility of regulatory limitations prior to use.
3.1.6 lubricating grease, n—a semifluid to solid product of
2. Referenced Documents a dispersion of a thickener in a liquid lubricant. D 217
3.1.6.1 Discussion—The dispersion of the thickener forms a
2.1 ASTM Standards:
two-phase system and immobilizes the liquid lubricant by
D 217 Test Method for Cone Penetration of Lubricating
2
surface tension and other physical forces. Other ingredients are
Grease
commonly included to impart special properties.
D 4175 Terminology Relating to Petroleum, Petroleum
3
3.1.7 thickener, n—in lubricating grease, a substance com-
Products, and Lubricants
4
posed of finely divided solid particles dispersed in a liquid
G 40 Terminology Relating to Wear and Erosion
lubricant to form the grease structure. D 217
2.2 Other Standard:
5
3.1.7.1 Discussion—The thickener can be fibers (such as
DIN 17230 Roller Bearing Steels
various metallic soaps) or plates or spheres (such as certain
3. Terminology
non-soap thickeners) which are insoluble or, at most, only very
slightly soluble in the liquid lubricant. The general require-
3.1 Definitions:
ments are that the solid particles be extremely small, uniformly
3.1.1 break-in, n—in tribology, an initial transition process
dispersed, and capable of forming a relatively stable, gel-like
occurring in newly established wearing contacts, often accom-
structure with the liquid lubricant.
panied by transients in coefficient of friction or wear rate, or
3.1.8 Ra, n—in measuring surface finish, the arithmetic
both, which are uncharacteristic of the given tribological
average of the absolute distances of all profile points from the
system’s long-term behavior. G40
6
mean line for a given distance.
3.1.9 Rz (DIN), n—in measuring surface finish, the average
1 of all Ry values (peak to valley heights) in the assessment
This test method is under the jurisdiction of ASTM Committee D-2 on
7
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee length.
D02.G0.04on Functional Tests Related to Friction, Wear and EP.
3.1.10 Ry, n—in measuring surface finish, the vertical
Current edition approved June 10, 1997. Published October 1997. Originally
published as D 5706 – 95. Last previous editioin D 5706 – 95.
2
Annual Book of ASTM Standards, Vol 05.01.
3 6
Annual Book of ASTM Standards, Vol 05.02. Amstutz, Hu, “Surface Texture: The Parameters,” Bulletin MI-TP-003-0785,
4
Annual Book of ASTM Standards, Vol 03.02. Sheffield Measurement Division, Warner and Swasey, 1985, p. 21.
5 7
Available from Beuth Verlog GmbH, Burggrafenstrasse 6, 1000 Berlin 30, Amstutz, Hu, “Surface Texture: The Parameters,” Bulletin MI-TP-003-0785,
Germany. Sheffield Measurement Division, Warner and Swasey, 1985, pp. 31, 29.
1

-
...