ASTM D3704-96

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 3704 – 96 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
Wear Preventive Properties of Lubricating Greases Using
the (Falex) Block on Ring Test Machine in Oscillating
1
Motion
This standard is issued under the fixed designation D 3704; 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 external force, one body moves or tends to move relative to the
other. G40
1.1 This test method covers the determination of wear
3.1.3 kinetic coeffıcient of friction, n—the coefficient of
properties of lubricating greases by means of the Falex
friction under conditions of macroscopic relative motion be-
block-on-ring friction and wear test machine.
tween two bodies. G40
1.2 The values stated in SI units are to be regarded as
3.1.4 wear, n—damage to a solid surface, generally involv-
standard except where equipment is supplied using inch-pound
ing progressive loss of material, due to relative motion between
units and would then be regarded as standard. The metric
that surface and a contacting substance or substances. G40
equivalents of inch-pound units given in such cases in the body
of the standard may be approximate.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The tester is operated with a steel test ring oscillating
safety concerns, if any, associated with its use. It is the
against a steel test block. Test speed, load, angle of oscillation,
responsibility of the user of this standard to establish appro-
time and specimen surface finish and hardness can be varied to
priate safety and health practices and determine the applica-
simulate field conditions.
bility of regulatory limitations prior to use
4.2 The width of the wear scar, developed on the test block
2. Referenced Documents from contact with the oscillating test ring, is measured.
2.1 ASTM Standards:
5. Significance and Use
D 1403 Test Method for Cone Penetration of Lubricating
5.1 This test method is used to differentiate between greases
Grease Using One-Quarter and One-Half Scale Cone
2 having high, medium, and low wear preventive properties
Equipment
using oscillating motion. The user of this method should
D 2714 Test Method for Calibration and Operation of the
3 determine to his own satisfaction whether results of this test
Falex Block-on-Ring Friction and Wear Testing Machine
procedure correlate with field performance or other bench test
3. Terminology machines.
3.1 Definitions:
6. Apparatus
3.1.1 coeffıcient of friction, μ or f, n—in tribology, the
6.1 Falex Block-on-Ring Test Machine with Friction Re-
dimensionless ratio of the friction force (F) between two
4
corder, described in detail in Annex A1 and illustrated in Fig.
bodies to the normal force (N) pressing these two bodies
1.
together.
4
6.2 Falex Oscillating Drive Accessory, described in detail
μ or 5 ~F/N! (1)
in A1.6 and illustrated in Fig. 2.
3.1.1.1 Discussion—A distinction is often made between
6.3 Microscope, low-power (503 to 603) having sufficient
static coeffıcient of friction and kinetic coeffıcient of friction.
clearance under objective to accommodate the test block. It
G40
should be fitted with a filar micrometer so that scar width may
3.1.2 friction force, n—the resisting force tangential to the
be measured with accuracy of 60.01 mm.
interface between two bodies when, under the action of an
6.4 Timer, graduated in minutes and seconds.
7. Reagents and Materials
1
4
This test method is under the jurisdiction of ASTM Committee D-2 on
7.1 Test Rings, Falex Type S-10 or S-25 —SAE 4620
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
carburize steel, having a hardness of 58 to 63 HRC. The test
D02.0L on Industrial Lubricants.
ring has a width of 8.15 mm (0.321 in.), a diameter of 35 mm
Current edition approved Apr. 10, 1996. Published June 1996. Originally
published as D 3704 – 78. Last previous edition D 3704 – 90.
2
Annual Book of ASTM Standards, Vol 05.01.
3 4
Annual Book of ASTM Standards, Vol 05.02. Available from Falex Corp., 1020 Airpark Dr., Sugar Grove, IL 60554.
1

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D 3704
FIG. 1 Falex Block on Ring Test Machine
FIG. 1 Falex Ring and Block Test Machine (continued)
(1.3775 in.) and a maximum radial run out of 0.013 mm 8. Calibration and Standardization
(0.0005 in.). The surface roughness of the S-10 ring shall be
8.1 Run Test Method D 2714 calibration procedure to en-
5
...