ASTM D2265-00
(Test Method)Standard Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
Standard Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
SCOPE
1.1 This test method covers the determination of the dropping point of lubricating grease.
1.2 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.
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An American National Standard
Designation:D2265–00
Standard Test Method for
Dropping Point of Lubricating Grease Over Wide
1
Temperature Range
This standard is issued under the fixed designation D2265; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope betweentheovenblocktemperatureandtheobserveddropping
point temperature. This corrected value is recorded as the
1.1 This test method covers the determination of the drop-
dropping point of the grease.
ping point of lubricating grease.
3.1.2 lubricating grease, n—a semi-fluid to solid product of
1.2 This standard does not purport to address all of the
a thickener in a liquid lubricant.
safety concerns, if any, associated with its use. It is the
3.1.2.1 Discussion—Thedispersionofthethickenerformsa
responsibility of the user of this standard to establish appro-
two-phase system and immobilizes the liquid lubricant by
priate safety and health practices and determine the applica-
surfacetensionandotherphysicalforces.Otheringredientsare
bility of regulatory limitations prior to use.
commonly included to impart special properties. D217
2. Referenced Documents 3.1.3 observed dropping point, n—the value noted on the
thermometer monitoring the internal temperature of the grease
2.1 ASTM Standards:
test cup when the first drop of material falls from the test cup
D217 Test Methods for Cone Penetration of Lubricating
2
and reaches the bottom of the test tube.
Grease
3.1.4 thickener, n—in lubricating grease, a substance com-
D235 Specifications for Mineral Spirits (Petroleum Spirits)
3
posed of finely-divided particles dispersed in a liquid to form
Hydrocarbon Dry Cleaning Solvent
the product’s structure.
D566 Test Method for Dropping Point of Lubricating
2
3.1.4.1 Discussion—Thickeners can be fibers (such as vari-
Grease
ous metallic soaps) or plates or spheres (such as certain
D3244 Practice for Utilization of Test Data to Determine
4
non-soapthickeners),whichareinsolubleor,atmost,onlyvery
Conformance with Specifications
5
slightly soluble in the liquid lubricant. The general require-
E1 Specification for ASTM Thermometers
mentsarethatthesolidparticlesbeextremelysmall,uniformly
3. Terminology
dispersed, and capable of forming a relatively stable, gel-like
structure with the liquid lubricant. D217
3.1 Definitions:
3.1.1 dropping point, n—a numerical value assigned to a
4. Summary of Test Method
grease composition representing the corrected temperature at
4.1 A grease sample in a grease test cup is supported in a
which the first drop of material falls from the test cup and
testtubeplacedinanaluminumblockovenatapresetconstant
reaches the bottom of the test tube.
temperature.Asamplethermometerisplacedinthetubeandso
3.1.1.1 Discussion—In the normal and proper operation of
positioned that it measures the temperature in the sample cup
this test method, the observed dropping point is corrected by
without coming in contact with the grease.
adding to it a value representing one third of the difference
4.2 As the temperature increases, at some point a drop of
material will fall from the cup to the bottom of the test tube.
1
This test method is under the jurisdiction of ASTM Committee D02 on
The reading on the sample thermometer is recorded to the
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
nearest degree as the observed dropping point. At the same
D02.G0.03 on Physical Tests, Non Rheological.
time, the temperature of the aluminum block oven is also
Current edition approved Dec. 10, 2000. Published January 2001. Originally
recorded to the nearest degree.
published as D2265–64. Last previous edition D2265–94a.
2
Annual Book of ASTM Standards, Vol 05.01.
4.3 One third the difference between the two values is the
3
Annual Book of ASTM Standards, Vol 06.04.
correction factor which is added to the observed value and
4
Annual Book of ASTM Standards, Vol 05.02.
5 recorded as the dropping point of the grease.
Annual Book of ASTM Standards, Vol 14.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2265–00
(a) Dimensions in millimetres.
FIG. 1 Apparatus for Dropping Point Test of Lubricating Grease
5. Significance and Use 6.1.3 Cup Support, glass tubing as shown in C, Fig. 1.
6.1.4 Thermometer,thermometer3CasprescribedinSpeci-
5.1 The dropping point is useful to assist in identifying the
ficationE1 and shown in D, Fig. 1.
grease as to type and
...
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