ASTM D6553-00
(Test Method)Standard Test Method for Coolant Compatibility of Way Lubricants
Standard Test Method for Coolant Compatibility of Way Lubricants
SCOPE
1.1 This test method measures the ability of single-use way lubricants to separate from metalworking coolants (synthetic coolants, semisynthetic coolants, and soluble oils) or other alkaline aqueous fluids.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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. For specific precautionary statements, see Section 7 .
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An American National Standard
Designation:D6553–00
Standard Test Method for
Coolant Compatibility of Way Lubricants
This standard is issued under the fixed designation D 6553; 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 solution (see Note 1) are stirred for 5 min at 54°C (see Note 2)
in a graduated cylinder. The time required for the separation of
1.1 This test method measures the ability of single-use way
theemulsionthusformedisrecorded.Ifcompleteseparationor
lubricants to separate from metalworking coolants (synthetic
emulsion reduction to 3 mL or less does not occur after
coolants, semisynthetic coolants, and soluble oils) or other
standing for 30 min, the volumes of oil (or fluid), water, and
alkaline aqueous fluids.
emulsion remaining at the time are reported.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
NOTE 1—Distilled water is not a satisfactory aqueous phase for testing
only.
the ability of way lubricants to separate from coolants because distilled
watergivesdifferentresultsfromcoolants.Thebestprocedureistousethe
1.3 This standard does not purport to address all of the
actual coolant that the way lubricant will contaminate.Abuffer solution of
safety concerns, if any, associated with its use. It is the
pH 9.0 may be used in place of a specific coolant to predict the
responsibility of the user of this standard to establish appro-
separability from alkaline coolants in general.
priate safety and health practices and determine the applica-
NOTE 2—It is recommended, however, that the test temperature be
bility of regulatory limitations prior to use. For specific
raised to 82 6 1°C when testing way lubricants more viscous than 90 cSt
precautionary statements, see Section 7.
(mm 2/s) at 40°C.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
In the normal use of a way lubricant in a machine tool, the
D 1193 Specification for Reagent Water
way lubricant eventually becomes a contaminant that may
D 1401 Test Method for Water Separability of Petroleum
emulsify into the coolant. It is generally desirable to remove
Oils and Synthetic Fluids
this contaminant by skimming; otherwise, the coolant lifetime
D 4057 Practice for Manual Sampling of Petroleum and
may be significantly shortened. This test method provides a
Petroleum Products
guide for determining the separability characteristics of way
lubricants that are expected to get into aqueous alkaline
3. Terminology
metalworking coolants. It is used for specification of new oils
3.1 Definitions:
and might be useful in monitoring of in-service oils.
3.1.1 cuff—alayerbetweenthewayoillayerandthecoolant
6. Apparatus
or buffer layer that contains significant amounts of both. In
describing this intermediate layer, cuff is preferred to emulsion
6.1 Cylinder, 100 mL, graduated from 5 to 100 mL in
since many of the coolants are themselves emulsions.
1.0-mL divisions, made of glass, heat-resistant glass, or a
chemical equivalent. The inside diameter shall be no less than
4. Summary of Test Method
27 mm and no more than 30 mm throughout its length,
4.1 This test procedure is essentially identical to Test
measured from the top to a point 6 mm from the bottom of the
Method D 1401, with the actual coolant or an alkaline buffer
cylinder. The overall length of the cylinder shall be 225 to 260
replacing the distilled water of that test method. A 40-mL
mm. The graduation shall not be in error by more than 1 mLat
sample and 40 mL of either actual coolant or a pH 9.0 buffer
any point on the scale.
6.2 Heating Bath, sufficiently large and deep enough to
permit the immersion of at least two test cylinders in the bath
This test method is under the jurisdiction of ASTM Committee D02 on
liquid up to their 85-mLgraduations.The bath shall be capable
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
of being maintained at a temperature of 54 6 1°C (see Note 2),
D02.L0 on Industrial Lubricants.
Current edition approved Aug. 10, 2000. Published October 2000.
and shall be fitted with clamps, which hold the cylinder in a
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
position so that the longitudinal axis of the paddle corresponds
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
to the vertical center line of the cylinder during the stirring
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6553–00
operation.The clamps shall hold the cylinder securely while its oughly with tap water and then with reagent water. Inspect the
contents are being stirred. cylinders for any residue or water droplets adhering to the
6.3 Stirring Paddle, made of chromium-plated or stainless inside walls. Both conditions indicate a need for additional
steel and conforming to the following dimensions: length, 120 cleaning.
3 1 3 1
6 1.5 mm (4 ⁄4 6 ⁄16 in.); width, 19 6 0.5 mm ( ⁄4 6 ⁄64 in.); 9.2 Cleanthestirringpaddleandshaftwithabsorbentcotton
thickness, 1.5 mm ( ⁄16 in.). It is mounted on a vertical shaft of or tissue wet with cleaning solvent and air dry. Care must be
similar metal, approximately 6 mm ( ⁄4 in.) in diameter, taken not to bend or misalign the paddle assembly during the
connected to a drive mechanism that rotates the paddle on its cleaning operation.
longitudinal axis at 1500 6 15 rpm. The apparatus is of such
design that, when the cylinder is clamped in position and the 10. Procedure
paddle assembly is lowered into the cylinder, a positive stop
10.1 Heat the bath liquid to 54 6 1°C (see Note 2) and
engages and holds the assembly when the lower edge of the
maintain it at that temperature throughout the test.Add coolant
paddle is 6 mm from the bottom of the cylinder. During the
orbuffer(seeNote3)tothegraduatedcylinderuptothe40-mL
operation of the stirrer, the center of the bottom edge of the
mark, and then add to the same cylinder a representative
paddle shall not deviate more than 1 mm from the axis of
sample of the oil (or fluid) under test until the top level of the
rotation. When not in operation, the paddle assembly can be
oil reaches the 80-mL mark on the cylinder. Place the cylinder
lifted vertically to clear the top of the graduated cylinder.
in the bath, and allow the contents to reach bath temperature.
Normally this will require about 10 min.
7. Reagents and Materials
NOTE 3—Ifinitialvolumetricmeasurementsaremadeatroomtempera-
7.1 Purity of Reagents—Reagent grade chemicals shall be
ture, expansion occurring at the elevated test temperature will have to be
used in all tests. Unless otherwise indicated, it is intended that
considered. For example, there will be a total volumetric expansion of
all reagents shall conform to the specifications of the Commit-
about 2 to 3 mL at 82°C. Corrections to each volume reading at 82°C,
tee
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