ASTM D2265-06(2014)
(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
SIGNIFICANCE AND USE
5.1 The dropping point is useful to assist in identifying the grease as to type and for establishing and maintaining bench marks for quality control. The results are to be considered to have only limited significance with respect to service performance because dropping point is a static test.
5.2 Cooperative testing3 indicates that, in general, dropping points by Test Method D2265 and Test Method D566 are in agreement up to 260°C. In cases where results differ, there is no known significance. However, agreement between the manufacturer and purchaser as to test method used is advisable.
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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Designation: D2265 − 06(Reapproved 2014)
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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.2 lubricating grease, n—a semi-fluid to solid product of
a thickener in a liquid lubricant.
1.1 This test method covers the determination of the drop-
3.1.2.1 Discussion—Thedispersionofthethickenerformsa
ping point of lubricating grease.
two-phase system and immobilizes the liquid lubricant by
1.2 This standard does not purport to address all of the
surfacetensionandotherphysicalforces.Otheringredientsare
safety concerns, if any, associated with its use. It is the
commonly included to impart special properties. D217
responsibility of the user of this standard to establish appro-
3.1.3 observed dropping point, n—the value noted on the
priate safety and health practices and determine the applica-
thermometer monitoring the internal temperature of the grease
bility of regulatory limitations prior to use.
test cup when the first drop of material falls from the test cup
and reaches the bottom of the test tube.
2. Referenced Documents
2 3.1.4 thickener, n—in lubricating grease, a substance com-
2.1 ASTM Standards:
posed of finely-divided particles dispersed in a liquid to form
D217Test Methods for Cone Penetration of Lubricating
the product’s structure.
Grease
3.1.4.1 Discussion—Thickeners can be fibers (such as vari-
D566TestMethodforDroppingPointofLubricatingGrease
ous metallic soaps) or plates or spheres (such as certain
D3244Practice for Utilization of Test Data to Determine
non-soapthickeners),whichareinsolubleor,atmost,onlyvery
Conformance with Specifications
slightly soluble in the liquid lubricant. The general require-
E1Specification for ASTM Liquid-in-Glass Thermometers
mentsarethatthesolidparticlesbeextremelysmall,uniformly
dispersed, and capable of forming a relatively stable, gel-like
3. Terminology
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
betweentheovenblocktemperatureandtheobserveddropping
material will fall from the cup to the bottom of the test tube.
point temperature. This corrected value is recorded as the
The reading on the sample thermometer is recorded to the
dropping point of the grease.
nearest degree as the observed dropping point. At the same
time, the temperature of the aluminum block oven is also
recorded to the nearest degree.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
4.3 One third the difference between the two values is the
Subcommittee D02.G0.03 on Physical Tests.
correction factor which is added to the observed value and
Current edition approved Nov. 1, 2014. Published November 2014. Originally
recorded as the dropping point of the grease.
approved in 1964. Last previous edition approved in 2006 as D2265–06. DOI:
10.1520/D2265-06R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Significance and Use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 The dropping point is useful to assist in identifying the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. grease as to type and for establishing and maintaining bench
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D2265 − 06 (2014)
(a) Dimensions in millimetres.
FIG. 1 Apparatus for Dropping Point Test of Lubricating Grease
marks for quality control. The results are to be considered to 6.1.3 Cup Support, glas
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2265 − 06 D2265 − 06 (Reapproved 2014)
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D217 Test Methods for Cone Penetration of Lubricating Grease
D566 Test Method for Dropping Point of Lubricating Grease
D3244 Practice for Utilization of Test Data to Determine Conformance with Specifications
E1 Specification for ASTM Liquid-in-Glass Thermometers
3. Terminology
3.1 Definitions:
3.1.1 dropping point, n—a numerical value assigned to a grease composition representing the corrected temperature at which
the first drop of material falls from the test cup and reaches the bottom of the test tube.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.G0.03 on Physical Tests.
Current edition approved May 1, 2006Nov. 1, 2014. Published May 2006 November 2014. Originally approved in 1964. Last previous edition approved in 20002006 as
D2265D2265 – 06.–00. DOI: 10.1520/D2265-06.10.1520/D2265-06R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3.1.1.1 Discussion—
In the normal and proper operation of this test method, the observed dropping point is corrected by adding to it a value representing
one third of the difference between the oven block temperature and the observed dropping point temperature. This corrected value
is recorded as the dropping point of the grease.
3.1.2 lubricating grease, n—a semi-fluid to solid product of a thickener in a liquid lubricant.
3.1.2.1 Discussion—
The dispersion of the thickener forms a two-phase system and immobilizes the liquid lubricant by surface tension and other
physical forces. Other ingredients are commonly included to impart special properties. D217
3.1.3 observed dropping point, n—the value noted on the thermometer monitoring the internal temperature of the grease test cup
when the first drop of material falls from the test cup and reaches the bottom of the test tube.
3.1.4 thickener, n—in lubricating grease, a substance composed of finely-divided particles dispersed in a liquid to form the
product’s structure.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D2265 − 06 (2014)
3.1.4.1 Discussion—
Thickeners can be fibers (such as various metallic soaps) or plates or spheres (such as certain non-soap thickeners), which are
insoluble or, at most, only very slightly soluble in the liquid lubricant. The general requirements are that the solid particles be
extremely small, uniformly dispersed, and capable of forming a relatively stable, gel-like structure with the liquid lubricant. D217
4. Summary of Test Method
4.1 A grease sample in a grease test cup is supported in a test tube placed in an aluminum block oven at a preset constant
temperature. A sample thermometer is placed in the tube and so positioned that it measures the temperature in the sample cup
without coming in contact with the grease.
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. The
reading on the sample thermometer is recorded to the nearest degree as the observed dropping point. At the same time, the
temperature of the aluminum block oven is also recorded to the nearest degree.
4.3 One third the difference between the two values is the correction fa
...
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