ASTM D2265-94a
(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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NOTICE: This standard has either been superseded and replaced by a new version or
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Designation: D 2265 – 94a An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Dropping Point of Lubricating Grease Over Wide
1
Temperature Range
This standard is issued under the fixed designation D 2265; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.2.1 Discussion—The dispersion of the thickener forms a
two-phase system and immobilizes the liquid lubricant by
1.1 This test method covers the determination of the drop-
surface tension and other physical forces. Other ingredients are
ping point of lubricating grease.
commonly included to impart special properties. D 217
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1.3 observed dropping point, n—the value noted on the
responsibility of the user of this standard to establish appro- thermometer monitoring the internal temperature of the grease
priate safety and health practices and determine the applica- test cup when the first drop of material falls from the test cup
bility of regulatory limitations prior to use.
and reaches the bottom of the test tube.
3.1.4 thickener, n—in lubricating grease, a substance com-
2. Referenced Documents
posed of finely-divided particles dispersed in a liquid to form
2.1 ASTM Standards:
the product’s structure.
D 217 Test Methods for Cone Penetration 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
D 235 Specifications for Mineral Spirits (Petroleum Spirits)
3
non-soap thickeners), which are insoluble or, at most, only very
Hydrocarbon Dry Cleaning Solvent
slightly soluble in the liquid lubricant. The general require-
D 566 Test Method for Dropping Point of Lubricating
2
ments are that the solid particles be extremely small, uniformly
Grease
dispersed, and capable of forming a relatively stable, gel-like
D 3244 Practice for Utilization of Test Data to Determine
4
structure with the liquid lubricant. D 217
Conformance with Specifications
5
E 1 Specification for ASTM Thermometers
4. Summary of Test Method
3. Terminology
4.1 A grease sample in a grease test cup is supported in a
3.1 Definitions:
test tube placed in an aluminum block oven at a preset constant
3.1.1 dropping point, n—a numerical value assigned to a
temperature. A sample thermometer is placed in the tube and so
grease composition representing the corrected temperature at
positioned that it measures the temperature in the sample cup
which the first drop of material falls from the test cup and
without coming in contact with the grease.
reaches the bottom of the test tube.
4.2 As the temperature increases, at some point a drop of
3.1.1.1 Discussion—In the normal and proper operation of
material will fall from the cup to the bottom of the test tube.
this test method, the observed dropping point is corrected by
The reading on the sample thermometer is recorded to the
adding to it a value representing one third of the difference
nearest degree as the observed dropping point. At the same
between the oven block temperature and the observed dropping
time, the temperature of the aluminum block oven is also
point temperature. This corrected value is recorded as the
recorded to the nearest degree.
dropping point of the grease.
3.1.2 lubricating grease, n—a semi-fluid to solid product of 4.3 One third the difference between the two values is the
correction factor which is added to the observed value and
a thickener in a liquid lubricant.
recorded as the dropping point of the grease.
1
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee 5. Significance and Use
D02.G0.03 on Physical Tests, Non Rheological.
5.1 The dropping point is useful to assist in identifying the
Current edition approved Feb. 15, 1994. Published April 1994. Originally
published as D 2265 – 64. Last previous edition D 2265 – 94.
grease as to type and for establishing and maintaining bench
2
Annual Book of ASTM Standards, Vol 05.01.
marks for quality control. The results are to be considered to
3
Annual Book of ASTM Standards, Vol 06.04.
4
have only limited significance with respect to service perfor-
Annual Book of ASTM Standards, Vol 05.02.
5
Annual Book of ASTM Standards, Vol 14.03. mance because dropp
...
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