ASTM D6121-19ae1

Standard Test Method for Evaluation of Load-Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque Used for Final Hypoid Drive Axles

SIGNIFICANCE AND USE
5.1 This test method measures a lubricant's ability to protect final drive axles from abrasive wear, adhesive wear, plastic deformation, and surface fatigue when subjected to low-speed, high-torque conditions. Lack of protection can lead to premature gear or bearing failure, or both.  
5.2 This test method is used, or referred to, in the following documents:  
5.2.1 American Petroleum Institute (API) Publication 1560.8  
5.2.2 STP-512A.9  
5.2.3 SAE J308.  
5.2.4 Military Specification MIL-PRF-2105E.  
5.2.5 SAE J2360.
SCOPE
1.1 This test method is commonly referred to as the L-37 test.2 This test method covers a test procedure for evaluating the load-carrying, wear, and extreme pressure properties of a gear lubricant in a hypoid axle under conditions of low-speed, high-torque operation.  
1.2 This test method also provides for the running of the low axle temperature (Canadian) L-37 test. The procedure for the low axle temperature (Canadian) L-37 test is identical to the standard L-37 test with the exceptions of the items specifically listed in Annex A9. The procedure modifications listed in Annex A9 refer to the corresponding section of the standard L-37 test method.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3.1 Exceptions—In Table A12.1, the values stated in SI units are to be regarded as standard. Also, no SI unit is provided where there is not a direct SI equivalent.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning information is given in Sections 4 and 7.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Oct-2019
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.B0.03 - Automotive Gear Lubricants & Fluids

Relations

• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM D235-02(2007) - Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
• Effective Date: 01-Jun-2007
• Refers: ASTM E29-06b - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Nov-2006
• Refers: ASTM E29-06a - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Sep-2006
• Refers: ASTM E29-06 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-May-2006
• Refers: ASTM E29-04 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Dec-2004
• Refers: ASTM D235-02 - Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
• Effective Date: 10-Dec-2002
• Refers: ASTM E29-02e1 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 10-May-2002
• Refers: ASTM D235-99 - Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
• Effective Date: 10-Dec-1999
• Refers: ASTM E29-93a(1999) - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 10-May-1999

Overview

ASTM D6121-19ae1 is the Standard Test Method for Evaluation of Load-Carrying Capacity of Lubricants Under Conditions of Low Speed and High Torque Used for Final Hypoid Drive Axles. Often referred to as the "L-37 test," this method provides a well-recognized procedure for assessing the performance of gear lubricants, ensuring they protect automotive and industrial final drive axles, particularly hypoid gears, against various forms of wear, deformation, and fatigue under demanding operational conditions. Developed by ASTM International, the standard is widely used to ensure lubricant reliability and quality in severe service environments.

Key Topics

• Test Purpose: Measures a lubricant’s ability to protect hypoid drive axles from abrasive wear, adhesive wear, plastic deformation, and surface fatigue during low-speed, high-torque operation.
• Distress Mechanisms: The test evaluates the lubricant's role in minimizing gear distress phenomena such as pitting, spalling, ridging, rippling, scoring, corrosion, and discoloration on ring and pinion gears.
• Test Protocol: Covers procedures for two test variants-the standard L-37 and a low axle temperature (Canadian) L-37 version-using specified hardware and closely monitored operational parameters.
• Calibration and Validity: Involves calibrated test stands and reference oils to ensure consistency and validity of results, with oversight by the ASTM Test Monitoring Center (TMC).
• Safety and Environmental Considerations: Users are responsible for adhering to all safety, health, and environmental regulations associated with running the test.
• Standardization: Developed according to internationally recognized practices, including WTO TBT principles for fair and open trade.

Applications

The ASTM D6121-19ae1 standard plays a critical role in the automotive and lubricant industries, offering practical value in multiple areas:

• Product Qualification: Used by lubricant manufacturers and vehicle OEMs to qualify gear oils for final hypoid drive axles, ensuring they meet performance requirements for wear and load-carrying capacity.
• Specification Compliance: Referenced by key industry documents and specifications, such as:
  • API Publication 1560
  • SAE J308 and J2360
  • Military Specification MIL-PRF-2105E
  • STP-512A
• Performance Benchmarking: Assists in benchmarking new and existing lubricants against established oils, facilitating product development and quality control.
• Regulatory and Contractual Requirements: Frequently cited in national and international procurement contracts for axles and vehicles, as well as for military, commercial, and off-highway applications.
• Failure Prevention: Helps prevent premature gear and bearing failures by validating the lubricant’s ability to withstand severe operational conditions routinely experienced in trucks, heavy-duty vehicles, and off-road machinery.

Related Standards

Several other standards complement and reference ASTM D6121-19ae1, supporting a comprehensive approach to gear lubricant evaluation:

• SAE J308: Information report on axle and manual transmission lubricants, detailing performance categories for automotive gear oils.
• SAE J2360: Performance specification for gear lubricants intended for severe applications, often relying on L-37 test results.
• API Publication 1560: Addresses lubricant service designations for automotive axles and transmissions, referencing D6121 protocols.
• MIL-PRF-2105E: U.S. military performance specification for multipurpose gear lubricants.
• ASTM D235: Specification for mineral spirits used as cleaning solvents for test hardware.

These standards collectively define industry best practices for lubricant testing, qualification, and performance assurance in gear and axle applications.

Keywords: ASTM D6121, L-37 test, gear lubricant, hypoid axle test, load-carrying capacity, axle wear, gear fatigue, lubricants testing, SAE J308, API Publication 1560, MIL-PRF-2105E.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
´1
Designation: D6121 − 19a
Standard Test Method for
Evaluation of Load-Carrying Capacity of Lubricants Under
Conditions of Low Speed and High Torque Used for Final
Hypoid Drive Axles
This standard is issued under the fixed designation D6121; 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.
ε NOTE—Editorially updated TMC governance information in June 2022.
INTRODUCTION
This test method is written for use by laboratories that use the portions of the test method that refer
to ASTM Test Monitoring Center (TMC) services (see Annex A1 – Annex A4). Laboratories that
choose not to use the TMC services may simply disregard these portions.
TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesire
to produce test results that are statistically similar to those produced by laboratories previously
calibrated by the TMC.
In general, the Test Purchaser decides if a calibrated test stand is to be used. Organizations such as
theAmericanChemistryCouncilrequirethatalaboratoryutilizetheTMCservicesaspartoftheirtest
registration process. In addition, the American Petroleum Institute and the Gear Lubricant Review
Committee of the Lubricant Review Institute (SAE International) require that a laboratory use the
TMC services in seeking qualification of oils against their specifications.
NOTE 1—The advantage of using the TMC services to calibrate test stands is that the test laboratory (and hence the
Test Purchaser) has an assurance that the test stand was operating at the proper level of test severity. It should also be
borne in mind that results obtained in a non calibrated test stand may not be the same as those obtained in a test stand
participating in the ASTM TMC services process.
1. Scope* low axle temperature (Canadian) L-37 test is identical to the
standard L-37 test with the exceptions of the items specifically
1.1 This test method is commonly referred to as the L-37
listed in Annex A9. The procedure modifications listed in
test. This test method covers a test procedure for evaluating
Annex A9 refer to the corresponding section of the standard
the load-carrying, wear, and extreme pressure properties of a
L-37 test method.
gear lubricant in a hypoid axle under conditions of low-speed,
high-torque operation.
1.3 Thevaluesstatedininch-poundunitsaretoberegarded
as standard. The values given in parentheses are mathematical
1.2 Thistestmethodalsoprovidesfortherunningofthelow
conversions to SI units that are provided for information only
axle temperature (Canadian) L-37 test. The procedure for the
and are not considered standard.
1.3.1 Exceptions—In Table A12.1, the values stated in SI
This test method is under the jurisdiction of ASTM Committee D02 on
units are to be regarded as standard. Also, no SI unit is
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
provided where there is not a direct SI equivalent.
Subcommittee D02.B0.03 on Automotive Gear Lubricants & Fluids.
Current edition approved Nov. 1, 2019. Published November 2019. Originally
1.4 This standard does not purport to address all of the
approved in 1997. Last previous edition approved in 2019 as D6121 – 19. DOI:
safety concerns, if any, associated with its use. It is the
10.1520/D6121-19AE01.
Until the next revision of this test method, the ASTM Test Monitoring Center
responsibility of the user of this standard to establish appro-
(TMC) will update changes in this test method by means of Information Letters.
priate safety, health, and environmental practices and deter-
This edition includes all Information Letters through No. 19-2. Information Letters
mine the applicability of regulatory limitations prior to use.
may be obtained from the ASTM Test Monitoring Center, 203 Armstrong Drive,
Freeport, PA 16229, Attn: Director. The TMC is also the source of reference oils. Specific warning information is given in Sections 4 and 7.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D6121 − 19a
1.5 This international standard was developed in accor- 3.1.5 chipping, n—on ring and pinion gears, a condition
dance with internationally recognized principles on standard- caused in the manufacturing process in which a small irregular
ization established in the Decision on Principles for the cavity is present only at the face/crown edge interface. The
Development of International Standards, Guides and Recom- edge-chipping phenomenon occurs when sufficient fatigue
mendations issued by the World Trade Organization Technical cycles accumulate after tooth surface wear relieves the com-
Barriers to Trade (TBT) Committee. pressive residual stress on the tooth profile side of the
profile-to-topland interface. Chipping within 1 mm of the
2. Referenced Documents
face/crown edge interface is to be called chipping, not
pitting/spalling. ASTM Distress Rating Manual No. 21
2.1 ASTM Standards:
D235Specification for Mineral Spirits (Petroleum Spirits) 3.1.6 corrosion, n—in final drive axles, a general alteration
(Hydrocarbon Dry Cleaning Solvent) of the finished surfaces of bearings or gears by discoloration,
E29Practice for Using Significant Digits in Test Data to accompanied by roughening not attributable to mechanical
Determine Conformance with Specifications action. ASTM Distress Rating Manual No. 21
3.1.7 cracked gear tooth, n—ageartoothexhibitingalinear
2.2 Military Specification:
MIL-PRF-2105ELubricating Oil, Gear, Multipurpose fracture of the tooth surface.
3.1.8 deposits, n—in final drive axles, material of pasty,
2.3 AGMA National Standard:
Nomenclature of Gear Tooth Failure Modes gummy, or brittle nature adhering to or collecting around any
of the working parts.
2.4 SAE Standard:
ASTM Distress Rating Manual No. 21
SAE J308Information Report on Axle and Manual Trans-
mission Lubricants 3.1.9 discoloration, n—on ring and pinion gears, any al-
SAE J2360Lubricating Oil, Gear Multipurpose (Metric) teration in the normal color of finished steel surfaces.
Military Use ASTM Distress Rating Manual No. 21
3.1.10 pitting, n—on ring and pinion gears, small irregular
3. Terminology
cavities in the tooth surface, resulting from the breaking out of
3.1 Definitions of Terms Specific to This Standard: small areas of surface metal.
ASTM Distress Rating Manual No. 21
3.1.1 abrasive wear, n—on ring and pinion gears, removal
of material from the operating surface of the gear caused by
3.1.11 ridging, n—on ring and pinion gears,analterationof
lapping of mating surfaces by fine particles suspended in
thetoothsurfacetogiveaseriesofparallelraisedandpolished
lubricant, fuel, or air or imbedded in a surface.
ridges running diagonally in the direction of sliding motion,
ASTM Distress Rating Manual No. 21
eitherpartiallyorcompletelyacrossthetoothsurfacesofgears.
3.1.2 adhesive wear, n—on ring and pinion gears, removal ASTM Distress Rating Manual No. 21
of material from the operating surface of the gear caused by
3.1.12 rippling, n—on ring and pinion gears, an alteration
shearing of junctions formed between operating surfaces in
of the tooth surface to give an appearance of a more or less
direct metal-to-metal contact; sheared-off particles either re-
regular pattern resembling ripples on water or fish scales.
mainaffixedtotheharderofthematingsurfacesoractaswear
ASTM Distress Rating Manual No. 21
particles between the surfaces.
3.1.13 scoring, n—on ring and pinion gears, the rapid
ASTM Distress Rating Manual No. 21
removal of metal from the tooth surfaces caused by the tearing
3.1.3 broken gear tooth, n—a gear tooth where a portion of
out of small contacting particles that have welded together as
the tooth face is missing and the missing material includes
a result of metal-to-metal contact. The scored surface is
some part of the top land, toe, heel, or coast side of the tooth.
characterized by a matte or dull finish.
3.1.3.1 Discussion—This condition is distinct from and
ASTM Distress Rating Manual No. 21
more extensive than “chipping,” which is defined in 3.1.5.
3.1.14 scratching, n—on ring and pinion gears, an altera-
3.1.4 burnish, n—on ring and pinion gears, an alteration of
tion of the tooth surface in the form of irregular scratches, of
theoriginalmanufacturedsurfacetoadullorbrightlypolished
random length, across the tooth surface in the direction of
condition. ASTM Distress Rating Manual No. 21
sliding of the surfaces.
ASTM Distress Rating Manual No. 21
3.1.15 spalling, n—on ring and pinion gears, the breaking
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
out of flakes of irregular area of the tooth surface, a condition
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
more extensive than pitting.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ASTM Distress Rating Manual No. 21
AvailablefromStandardizationDocumentsOrderDesk,Bldg4,SectionD,700
3.1.16 surface fatigue, n—on ring and pinion gears, the
Robbins Avenue, Philadelphia, PA 19111–5098.
failure of the ring gear and pinion material as a result of
American Gear Manufacturers Assn. (AGMA), 1500 King St., Suite 201,
Alexandria, VA 22314.
repeated surface or subsurface stresses that are beyond the
AvailablefromSAEInternational(SAE),400CommonwealthDr.,Warrendale,
endurance limit of the material. It is characterized by the
PA 15096, http://www.sae.org.
removal of metal and the formation of cavities.
Formerly known as CRC Manual 21. Available from the ASTM website,
www.astm.org, (TMCMNL21). AGMA National Standard
´1
D6121 − 19a
3.1.17 wear, n—on ring and pinion gears, the removal of 6.2 Test Stand and Laboratory Equipment:
metal, without evidence of surface fatigue or adhesive wear,
6.2.1 Axle Vent—Venttheaxletotheatmospherethroughout
resulting in partial or complete elimination of tool or grinding
the entire test and arrange the vent so that no water enters the
marks or development of a discernible shoulder ridge at the
housing.
bottomofthecontactareaneartherootoratthetoeorheelend
6.2.2 Axle Cover—The axle cover may have a port installed
of pinion tooth contact area (abrasive wear).
to allow for ring gear inspection after the gear condition phase
ASTM Distress Rating Manual No. 21
(see 10.1). See Fig. A5.1 for an example.
6.2.3 Test Stand Configuration—Mount the complete as-
4. Summary of Test Method
sembly in a rigid fixture as shown in Fig.A6.1. Mount the test
4.1 Prior to each test run, inspect the test unit (final axle
unit in the test stand with pinion and axle shaft centerlines
assembly) and measure and record confirming manufacturing
horizontal.
specifications.
6.2.4 Temperature Control—The test axle housing shall
include a means of maintaining the lubricant at a specified
4.2 Beginthetestwhentheaxleassemblyisinstalledonthe
temperature. This shall include a thermocouple, a temperature
test stand and charged with test lubricant.
recording system, and a cooling method.
4.3 Gear Conditioning Phase—Runthechargedtestunitfor
6.2.4.1 Thermocouple—Determine the thermocouple loca-
100 min at 440 wheel r/min and 395 lbf-ft (535 N·m) torque
tion on the rear cover using the cover plate temperature sensor
per wheel, maintaining an axle sump temperature of 297°F
locating device as shown in Fig. A7.1.
(147°C). (Warning—High-speed rotating equipment, electri-
(1) Install the thermocouple such that the thermocouple
cal shock, high-temperature surfaces.)
tip is flush with the cover plate lip by placing the cover plate
4.4 Gear Test Phase—Next, run the test unit for 24 h at the
face on a flat surface and inserting the thermocouple into the
operating conditions dictated by the hardware batch and type
cover plate until the thermocouple tip is flush with the flat
combination (see 10.2.3.1).
surface.
(2) Lock the thermocouple into place.
4.5 The test is completed at the end of the gear test phase.
6.2.4.2 Temperature Recording System—The temperature
Visually inspect the test parts.
4.5.1 Remove the ring gear, pinion, and pinion bearing, and recording system shall record the temperature of the test oil
throughout the test.
rate for various forms of distress. Use the condition of the ring
gear and pinion to evaluate the performance of the test oil. 6.2.4.3 Axle Cooling—Use three spray nozzles to distribute
water over the cover plate and axle housing as shown in Fig.
5. Significance and Use
A8.1. Actuate the water control valve by the temperature PID
control system. See A9.3.2.1 for L-37 Canadian Version test.
5.1 Thistestmethodmeasuresalubricant’sabilitytoprotect
(1)Spray nozzles shall be any combination of the fol-
final drive axles from abrasive wear, adhesive wear, plastic
lowingpartnumbersdependingonhowthesystemisplumbed:
deformation, and surface fatigue when subjected to low-speed,
Straight Male NPT (Part No. 3/8GG-SS22), 90° Male NPT
high-torque conditions. Lack of protection can lead to prema-
(Part No. 3/8GGA-SS22), Straight Female NPT (Part No.
ture gear or bearing failure, or both.
3/8G-SS22), and 90° Female NPT (Part No. 3/8GA-SS22).
5.2 This test method is used, or referred to, in the following
(2)Use a single control valve to control the cooling water
documents:
supply. The control shall be a ⁄2 in. (12.7 mm) two-way, C
5.2.1 American Petroleum Institute (API) Publication
linear trim, air to close, Research Control valve. Use a single
1560.
PIDlooptomaintaintheaxlelubricanttemperaturecontrolfor
5.2.2 STP-512A.
both the Standard and Canadian version test. A separate PID
5.2.3 SAE J308.
loopcontrolforeachversionisnotpermitted.SeeA9.3.2.2for
5.2.4 Military Specification MIL-PRF-2105E.
L-37 Canadian Version test.
5.2.5 SAE J2360.
3 1
(3)Useonly ⁄8or ⁄2in.(9.5mmor12.7mm)linematerial
to the spray nozzles.
6. Apparatus
(4)Use a minimum supply water pressure of 25 psi
6.1 Test Unit—The test unit is a new complete hypoid truck
(172kPa) to the control valve.
axle assembly less axle shafts, Dana Model 60, 5.86 to 1
(5)Use an axle box cover as shown in Fig. A8.2. The
ratio. See Annex A9 for part numbers.
purpose is to contain water and eliminate drafts.
(6)Use a locating pin or stop block as an indexing device
to ensure that all subsequent axle installations are consistently
“Lubricant Service Designations for Automotive Manual Transmissions,
Manual Transaxles, andAxles,” available fromAmerican Petroleum Institute, 1220
L St. NW, Washington, DC 20005.
“Laboratory Performance Tests for Automotive Gear Lubricants Intended for
API GL-5 Service.” Thesolesourceofsupplyoftheapparatusknowntothecommitteeatthistime
Thesolesourceofsupplyoftheapparatusknowntothecommitteeatthistime is Spray Systems Company, and the spray nozzles can be purchased through E.I.
isDanaCorp.,P.O.Box2424,FortWayne,IN46801.Ifyouareawareofalternative Pfaff Company, 3443 Edwards Road, Suite D, Cincinnati, OH 45208. If you are
suppliers, please provide this information to ASTM International Headquarters. aware of alternative suppliers, please provide this information to ASTM Interna-
Your comments will receive careful consideration at a meeting of the responsible tional Headquarters.Your comments will receive careful consideration at a meeting
1 1
technical committee, which you may attend. of the responsible technical committee, which you may attend.
´1
D6121 − 19a
installed perpendicular with the axle housing cover to engine 8.2.1.1 If all three of these tests are operationally valid and
and transmission driveshaft centerline. meet the LTMS acceptance criteria for approved hardware and
6.2.5 Power Source—The power source consists of a both134runpinionresultsfailSAEJ2360acceptancecriteria,
gasoline-powered V-8 engine capable of maintaining test thelaboratoryisapprovedtobuildaxlesfortestingandthetest
conditions. stand is calibrated for the period described in 9.1.
6.2.6 Dynamometers and Torque Control System—Use two 8.2.1.2 If only the TMC 152-2 does not meet the LTMS
axledynamometerswithsufficienttorqueabsorbingcapacityto acceptance criteria, rerun one TMC 152-2 fluid. If the repeat
maintain axle torque and speed conditions. Suitable control runmeetsLTMSacceptancecriteria,thelaboratoryisapproved
equipment with sensitivity of adjustment to permit mainte- to build axles for testing and the test stand is calibrated for the
nance of test conditions is required. period described in 9.1.
6.2.7 Dynamometer Connecting Shafts—Fabricate shafts 8.2.1.3 If only one of the two TMC 134 pinion results does
connecting the dynamometer to the axle shafts. Shafts shall be not fail SAE J2360 acceptance criteria, rerun two consecutive
strong enough to handle the torques encountered and shall be TMC 134’s. If the pinion results for both repeats fail SAE
dynamically (spin) balanced. J2360 acceptance criteria, the laboratory is approved to build
6.2.8 Drive Shaft and Universal Joints—Fabricate a shaft axles for testing and the test stand is calibrated for the period
with universal joints connecting the manual transmission and described in 9.1.
test axle. The shaft shall have a 4in. 6 0.2in. (10.1 cm 6 8.2.1.4 If two of the three tests do not meet their designated
0.51 cm) outside diameter with a 0.095 in. 6 0.005 in. acceptance criteria, or the required repeats described in 8.2.1.2
(0.24cm 6 0.013 cm) wall thickness. Shaft and universal or8.2.1.3donotmeetthedesignatedacceptancecriteria,repeat
joints should be strong enough to handle the torques encoun- 8.2.1.
tered and shall be dynamically (spin) balanced.
8.3 Serial Number Reporting—When rebuilding an axle
6.2.9 Transmission and Coupling—Coupletheenginetothe
assembly, follow this template for creating a serial number:
testunitthroughaclutchandmanualtransmissionofsufficient
LAB-CXXXX-NN
torque carrying capacity to operate normally under test condi-
where:
tions.
LAB designates the assembly as being lab-built
-C is the one-character TMC coded lab designation
6.3 Speed Measuring and Control System, capable of mea-
-XXXX is a unique 4-digit identifier for the housing
suring speed of both axles and also of maintaining test
-NN is a 2-digit count of the number of rebuilds on the housing
conditions.
8.3.1 Permanentlymarktheserialnumberintotheaxletube
at a location near the housing vent. Revise the 2-digit rebuild
7. Reagents and Materials
count number each time the assembly is rebuilt.
7.1 Sealing Compound, where necessary, Permatex No. 2,
8.4 Preparation of Axle:
or equivalent.
8.4.1 Use either a newly manufactured axle assembly or, if
the lab-built provisions of 8.2 have been met, a new V1L528/
7.2 Solvent—Use only mineral spirits meeting the require-
P4T883A gear set assembled into a reused axle housing
ments of Specification D235, Type II, Class C for Aromatic
according to the Dana Model 60 Maintenance Manual and
Content(0%to2%vol),FlashPoint(142°F⁄61°C,min)and
using components from the Dana rebuild parts list given in
Color (not darker than +25 on Saybolt Scale or 25 on Pt-Co
Annex A9, Table A9.2.
Scale). (Warning—Combustible. Health hazard.) Obtain a
8.4.2 When using an axle assembly rebuilt per 8.4.1 or an
Certificate of Analysis for each batch of solvent from the
assembly from an older approved hardware batch that was not
supplier.
marked with contact pattern information by the manufacturer,
applygearcontactpatterngreaseonthedriveandcoastsideof
8. Preparation of Apparatus
the ring gear. Turn the input of the axle assembly while
8.1 Cleaning of Reusable Hardware—Cleanasnecessaryall
applying a resisting force to the ring sufficient to require an
reusable parts including axle shafts, thermocouples, axle hous-
axleinputtorqueofapproximately30lbf·ft(40.7N·m).Rotate
ingcover,andallassociateddrainpansandfunnelsusedforthe
ring and pinion through the gear contact pattern grease on the
addition of and collection of test oil.
drive and coast side and verify that the patterns for both sides
8.2 Lab-built Axles: areacceptable.Recordthedrivesidecontactpatternlengthand
8.2.1 To be approved to build axles acceptable for testing, flankvaluesinthetestreport.Includedrivesidepatternphotos
obtain a separate approval for each of the two hardware types of the ring gear in the test report.
(lubritedandnon-lubrited).Approvalmaybeobtainedforboth 8.4.3 If the axle assembly is a newly manufactured assem-
hardware types by conducting three tests on each hardware bly received from Dana Corporation, the drive side contact
type, or approval can be obtained with either hardware type pattern length and flank values will be marked on the axle
independentlybyconductingjustthreetestsonthattype.Tobe housing. Record these drive side contact pattern values in the
approved to build axles acceptable for testing, assemble three test report.
axles in accordance with subsection 8.4 using any acceptable 8.4.4 Use only axle assemblies having a length value of L
3 –1 0 +1
hardware set. Run these axles in tests using a blind mix of the or L and a flank value of F ,F,orF .
following TMC-assigned oils: one TMC 152-2 and two TMC 8.4.5 Breakaway and Turning Torque Measurements—
134’s (or approved re-blends of 134). Measure and record the breakaway and turning torques of the
´1
D6121 − 19a
completely assembled test unit. Do not use any axle assembly 9.3 Instrumentation Calibration—Using known standards
where the breakaway or turning torque exceeds 55 lbf·in. traceabletotheNationalInstituteofStandardsandTechnology
(6.2N·m). (NIST) (orusingphysicalconstants),calibratetheaxlespeed
8.4.6 Backlash Measurements—Record the backlash measuring system, temperature control system, and torque
marked on the axle by the manufacturer. Use only axle measuring system immediately prior to every other calibration
assemblies having a manufacturer-reported backlash measure- testoreveryninemonths,whicheveroccursfirst.Recalibration
ment from 0.004in. to 0.012 in. (0.102 mm to 0.305 mm). ofinstrumentationintheeventoffailedorinvalidfirstattempts
8.4.6.1 If the test axle is lab-built or is not marked with a at stand calibration are at the discretion of the test engineer.
manufacturer-reported backlash measurement, remove the
10. Test Procedure
cover plate and measure the backlash at four equally spaced
10.1 Gear Conditioning Phase:
locations.Recordthesefourmeasurementsandtheiraveragein
10.1.1 Set the temperature control to maintain a lubricant
the test report. Use only axle assemblies with an average
temperature of 297°F 6 3°F (147.2 °C 6 1.7 °C). See
backlashfrom0.004in.and0.009in.(0.102mmto0.229mm).
A9.3.3.2 for L-37 Canadian Version test.
8.4.7 Cleaning—Wash the test unit using a cleaning solvent
10.1.2 With the engine warmed up and with no load on the
(see7.2).Payparticularattentiontoremoveallpreservativeoil
from the pinion bearings and any contact pattern grease that dynamometers,shiftsmoothlytoagearappropriateforthetest
conditions.
may be present. Dry by blowing with clean, dry compressed
air. 10.1.3 After reaching the appropriate gear, accelerate
smoothlyto440 65wheelr/minandapplydynamometerload
8.4.8 Install axle shafts in test unit.
to achieve a torque of 395lbf-ft 6 15lbf-ft (535 N·m 6
8.4.9 Lubricate the carrier bearings, pinion bearings, differ-
20N·m) on each wheel (see Note 2).
entialgears,andtheringgearandpinion,using6.0pt 60.1pt
(2.8 L 6 0.05 L) of test lubricant.
NOTE 2—The time required to accelerate to the test conditions of
8.4.10 Installtheaxlecoverplatewithgasket(applysealant,
440wheel r⁄min and 395 lbf-ft (535 N·m) is about 5 min.
if needed). Do not drain the oil and recharge the test axle once
10.1.4 The test starts when required speed and torque
the test oil has been charged to the axle.
conditions are reached. Record the time as start of the test.
8.5 Install the test unit on the stand with pinion and axle
10.1.5 After reaching speed and torque conditions, run the
shaft centerlines horizontal. Connect dynamometers and drive
test for 100min 6 1min.
shaft to the test unit.
10.1.6 To ensure accuracy of the test, record speed, torque,
and temperature at a minimum of once every minute.
9. L-37-specific Calibration and Standardization Items
10.1.7 At the end of the 100 min, and as the torque and
(See Annex A2 for General Calibration and
linear speed ramp-down is started, set the axle lubricant
Standardization Information)
temperaturecontrollertoasetpointof275°F 63°F(135.0°C
9.1 Reference Test Frequency—The test stand calibration
6 1.7 °C). Shift transmission to neutral and ensure that the
period is defined as four months or 650 test hours, whichever
axles stop turning. Record ending time and temperature of the
occurs first. It begins on the completion date of an operation-
lubricant. See A9.3.3.3 for L-37 Canadian Version test.
allyandstatisticallyacceptablereferenceoiltestasdetermined
NOTE 3—The intent is to allow water to be added to the axle unit while
bytheTMC.Anyteststartedonorbeforethestandcalibration
it is still turning to cool the axle lubricant temperature and ensure that the
expiration date is defined to have been run on a calibrated
water is shut off when the axle lubricant temperature drops below the set
point.
stand.
9.1.1 When a test stand is out of calibration for a period of
10.1.8 Restart the test, as detailed in 10.3.1, if the test is
six months or longer, renumber the stand, and follow LTMS
stopped for any reason (power outage, maintenance, and so
guidelines for new stand introduction.
forth). This stoppage shall count as one of the allowed
9.1.2 Reportmodificationofteststandapparatusorcomple-
shutdowns during the test. Do not calculate deviation percent
tion of any nonstandard test on a calibrated test stand to the
values or report out of limit operational values until test
TMC immediately.
conditions are again achieved. If the test is stopped at the start
9.1.3 Alternate testing of L-37 and L-42 tests does not
of the conditioning phase, before speed and torque conditions
necessitate recalibration as long as the above requirements are
are reached, the stoppage will not count as one of the allowed
met.
shutdowns.
9.1.4 Within a calibration period, alternate testing using
10.2 Gear Test Phase:
differentgearbatchesanddynamometertorqueconditionsdoes
10.2.1 Ensure that the temperature control is still set to
not necessitate recalibration.
maintainalubricanttemperatureof275°F 63°F(135.0°C 6
9.2 Every test start on any test stand shall receive a
1.7°C). See A9.3.3.4 for L-37 Canadian Version test.
sequentialtestrunnumberdesignatedbeforetestingbegins.All
10.2.2 With the engine warmed up and with no load on the
tests, including aborted starts and operationally invalid tests,
dynamometers,shiftsmoothlytoagearappropriateforthetest
must retain their test number.
conditions.
12 13
The L-42 procedure is currently being developed into a standard test method National Institute of Standards and Technology (formerly National Bureau of
by Subcommittee D02.B0. Standards), Gaithersburg, MD 20899.
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NOTE 4—The transition from the end of the conditioning phase (see
achieveatorquevalueof1044lbf·ft 635 lbf·ft(1415 N·m 6
10.1.7) to the appropriate test gear of the gear test phase is approximately
47 N·m)untilthelubricanttemperaturereaches175°F 63°F
5 min.
(79.4°C 6 1.7°C).
10.2.3 After reaching the appropriate gear, accelerate
NOTE 6—If the restart occurs following a shutdown during the
smoothly to 80 6 1 wheel r/min and apply dynamometer
conditioning phase, follow 10.1.1 through 10.1.4 to restart the test.
torquetoachieveatorqueof1044lbf-ft 635lbf-ft(1415N·m
10.3.1.5 Once lubricant temperature reaches 175°F 63°F
6 47N·m) on each wheel. Hold at this condition until the axle
(79.4°C 61.7°C),immediatelyapplydynamometertorqueon
lubricant temperature reaches 175°F 6 3°F (79.4°C 6
eachwheeltoachievethetorquesetpointconditionatthetime
1.7°C).
of the shutdown.
NOTE 5—The time required to accelerate to the test conditions of
80wheel r⁄min and 1044 lbf-ft (1415 N·m) is about 10 min.
11. Axle Post Test Measurements
10.2.3.1 Oncetheaxlelubricanttemperaturereaches175°F
11.1 Break and Turn Torques:
6 3°F (79.4°C 6 1.7°C), immediately apply dynamometer
11.1.1 Whiletheunitishot,determineandrecordthetorque
load to achieve a torque of 1740lbf-ft 6 35lbf-ft (2359 N-m
requiredtobreakandtoturnthepinionshaftofthecompletely
6 47 N-m) on each wheel. When conducting tests with
assembled test unit.
non-lubritedgearbatchV1L500/P4T813orlubritedgearbatch
11.1.2 Allow the unit to cool, and record the torques
V1L528/P4T883A, use the 13 % reduced contact stress re-
requiredtobreakandtoturnthepinionshaftofthecompletely
quirements (see A9.4.1).
assembled test unit.
10.2.4 The test phase starts when required speed, torque,
11.2 Drain the axle of test lubricant. This may occur
and temperature conditions are reached. Record the time as
anytime after 10.2.7 has been completed.
start of the test phase.
10.2.5 After reaching speed, torque, and temperature 11.3 Backlash Measurements—Remove the cover plate.
conditions, run the test for 24h 6 0.2h. Record backlash at four equally spaced locations on the ring
10.2.6 To ensure test accuracy, record speed, torque, and gear and calculate the average of the four readings.
temperature at a minimum of once every minute.
11.4 Completely disassemble the differential and the pinion
10.2.7 At the end of 24 h, close the throttle smoothly, shift
shaft assemblies for inspection.
thetransmissiontoneutral,andrecordtimeandtemperatureof
the lubricant.
12. Determination of Test Results
10.2.8 Disconnect the drive shaft and axle shafts from the
12.1 Pinion Bearing Rating—Examine the bearings for
dynamometers, and remove the test unit from the test stand
wear, surface fatigue corrosion, and deposits in accordance
while the test unit is hot.
with ASTM Distress Rating Manual 21.
10.2.9 Restart the test, as detailed in 10.3.1, if the test is
12.2 Gear Rating:
stopped for any reason (power outage, maintenance, and so
12.2.1 Examine the tooth surfaces on the drive side of the
forth). This stoppage shall count as one of the allowed
pinion and ring gear for the following distresses in accordance
shutdowns during the test. Do not calculate deviation percent
with ASTM Distress Rating Manual 21 and Annex A12:
values or report out of limit operational values until test
burnishing, wear, pitting/spalling, ridging, rippling, scoring,
conditions are again achieved. If the test is stopped at the start
discoloration, corrosion, and deposits. Rate the distress types
of the test phase, before test conditions are reached (speed,
ofwear,rippling,andridgingusingtheASTMPhotographsfor
load, and axle temperature), the stoppage will not count as one
Gear Distress. The photographs shall be an ASTM item
of the allowed shutdowns.
TMCGEARDISTRESS2010PR and shall have been issued on
10.3 Unscheduled Downtime—An unscheduled downtime
15,16
or after November 9, 2010.
event is defined as any time the engine, or gears, or both, stop
12.2.2 Rate each distress by identifying its level of distress
turningduringthesteadystategearconditioningorsteadystate
in accordance with Table A12.1. Four distress types (ridging,
gear test phases after test conditions are achieved.
rippling, scoring, and wear) are assigned a numerical value
10.3.1 Restart After Unscheduled Downtime—Restart the
between 0 and 10 corresponding to the rated level of distress,
testasoutlinedin10.3.1.1through10.3.1.5anytimethereisan
as shown in Table A12.1.
unscheduled downtime event.
12.2.2.1 The pitting/spalling distress type is assigned a
10.3.1.1 Set the temperature control to maintain the lubri-
numerical value shown separately in Table A12.1.
cant temperature at the set point condition when the shutdown
12.2.3 Transform the rated test results according to Table 1.
occurred.
Add any applicable corrections outlined in 12.3 and then
10.3.1.2 Withtheenginewarmedupandwithnoloadonthe
un-transform the value for final result reporting.
dynamometers,shiftsmoothlytoagearappropriateforthetest
condition.
10.3.1.3 After reaching the appropriate gear, accelerate
Supporting data have been filed atASTM International Headquarters and may
be obtained by requesting Research Report RR:D02-1415.
smoothly to the wheel r/min set point condition at the time of
Available from the ASTM website, www.astm.org.
the shutdown.
Training for individuals rating gear sets for gear distress level may be
10.3.1.4 If the restart occurs following a shutdown during
coordinated through the ASTM Test Monitoring Center, 203 Armstrong Drive,
the test phase, apply a dynamometer load on each wheel to Freeport, PA 16229.
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D6121 − 19a
TABLE 1 Transformations
parameters and number of shutdowns are within the limits
Parameter Transformation specified and defined in Annex A11.
Ridging –ln (10.5 – merit)
12.6 Consider as non-interpretable any non-reference oil
Rippling –ln (10.5 – merit)
Pitting/Spalling –ln (10.5 – merit)
test that has not been run in a calibrated test stand or not
Wear none
conducted on approved hardware, or both. Indicate on the
cover page of the test report that the test is non-interpretable
and that it has not been conducted in a valid manner in
accordance with the test method.
12.3 Correction Factors and Exclusions:
12.7 Any reference or non-reference oil test exhibiting a
12.3.1 C1L426/P4L415A Nonlubrited Gear Set—When us-
broken or cracked pinion or ring gear tooth is non-
ing the nonlubrited hardware, gear set C1L426/P4L415A,
interpretable. Note any broken teeth in the comment section of
determine a numerical pitting/spalling value, excluding any
the test report.
pitting/spalling value between 9.3 and 9.9, inclusively, in the
wearstepareaofthedrivesidepiniontooth,asperAnnexA13.
12.8 Rate only the corrosion on the contact surface of the
12.3.2 V1L303/P4L514A Nonlubrited Gear Set—When us-
drive side of any pinion or ring gear tooth. Enter the corrosion
ing the nonlubrited hardware, gear set V1L303/P4L514A,
rating in the rating section of the rating form. Note any
determine a numerical pitting/spalling value, excluding any
corrosion on the pinion and ring in a non-contact surface area
pitting/spalling value between 3.0 and 9.9, inclusive, in the
in the comment section of the rating form.
wearstepareaofthedrivesidepiniontooth,asperAnnexA13.
12.3.3 V1L686/P4L626A Lubrited Gear Set—When using
13. Report
the lubrited hardware, gear set V1L686/P4L626A, for non-
13.1 Forreferenceoiltests,usethestandardizedreportform
reference oil tests, add a correction factor of 0.5186 to the
set available from the TMC.
pinion transformed ridging test result, and add 0.9922 to the
ring transformed ridging test result.
NOTE 7—Report the non-reference oil test results on these same forms
if the results are intended to be submitted as candidate oil results against
12.3.3.1 On the V1L686/P4L626Agear set, a thin polished
a specification.
line visible in the root heel of the pinion and on the crown of
the ring gear might be evident. The polish line might vary in
13.1.1 Fill out the report forms according to the formats
lengthandprominenceduetothebuildpositionoftheringand shown in the data dictionary.
pinion gears and manufacturing accuracy of the carrier. This
13.1.2 Transmit results to the TMC within 5 working days
condition is normal and not oil-related. Note this condition in
of test completion.
the final test report comment section as Root and Tip line
13.1.3 Transmittheresultselectronicallyasdescribedinthe
polishing and a function of the gear set manufacturing process
ASTM Data Communications Committee Test Report Trans-
— V1L686/P4L626A.
mission Model (Section 2 — Flat File Transmission Format)
12.3.4 V1L528/P4T883A Nonlubrited Gear Set—When us-
available from the ASTM TMC. Upload files via the TMC’s
ing the nonlubrited hardware gear set V1L528/P4T883A for
website
non-reference oil tests, add 0.3365 to the transformed test
13.2 Report all reference oil test results, whether aborted,
result of both pinion ridging and pinion rippling. Rate each
invalidated, or successfully completed, to the TMC.
pinion tooth for pitting/spalling and report the fourth lowest
tooth rating for the final pinion pitting/spalling test result. 13.3 Deviations from Test Operational Limits—Report all
12.3.4.1 See A9.3.4 for L-37 Canadian Version test. deviations from specified test operational limits.
12.3.5 V1L528/P4T883A Lubrited Gear Set—When using
13.4 Precision of Reported Units—Use the Practice E29
the lubrited hardware gear set V1L528/P4T883A for non-
rounding off method for critical pass/fail test result data.
reference oil tests, add 0.3365 to the transformed pinion
Report the data to the same precision as indicated in data
ridging test result. Rate each pinion tooth for pitting/spalling
dictionary.
and report the second lowest tooth rating for the final pinion
13.5 In the space provided, note the time, date, test hour,
pitting/spalling test result.
and duration of any shutdown or offtest condition. Document
12.3.5.1 See A9.3.4 for L-37 Canadian Version test.
the outcome of all prior reference oil tests from the current
12.4 For a test rating to be valid, the gears shall be rated by
calibration sequence that were operationally or statistically
an individual who has participated in an ASTM gear-rater
invalid.
calibration workshop within the previous twelve months and
13.6 If a calibration period is extended beyond the normal
has been calibrated as outlined in the L-37 Rater Calibration
calibration period length, make a note in the comment section
Monitoring System (RCMS). The RCMS calibration period is
andattachawrittenconfirmationofthegrantedextensionfrom
every six months or as otherwise required by the RCMS. A
the TMC to the test report. List the outcomes of previous runs
copy of the RCMS document is available on the ASTM Test
that may need to be considered as part of the extension in the
Monitoring Center web page at http://www.astmtmc.org/, or it
comment section.
can be obtained in hardcopy format from the TMC.
12.5 Test Validity—The test is determined to be operation- 13.7 Attach to the test report a plot of the temperature data
ally valid if the percent deviation of the critical operating recorded.
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D6121 − 19a
14. Precision and Bias 14.1.2 Reproducibility Conditions—Conditions where test
results are obtained with the same test method using the same
14.1 Precision—Testprecisionisestablishedonthebasisof
gear batch on the same test oil in different laboratories with
reference oil test results (for operationally valid tests) moni-
different operators using different equipment.
tored by theASTMTMC.The data are reviewed semiannually
by the L-37 Surveillance Panel. Contact the ASTM TMC for 14.1.2.1 Reproducibility Limit (R)—The difference between
current industry data. Table 2 summarizes reference oil preci- two results obtained under reproducibility conditions that
sion of the test as of March 29, 2005.
would,inthelongrun,inthenormalandcorrectconductofthe
14.1.1 Intermediate Precision Conditions—Conditions
test method, exceed the values shown in Table 2 in only one
wheretestresultsareobtainedwiththesametestmethodbythe
case in twenty. When only a single test result is available, the
same laboratory, with the same gear batch using the same test
Reproducibility Limit can be used to calculate a range (test
oil, with changing conditions such as operators, measuring
result 6 Reproducibility Limit) outside of which a second test
equipment, test stands, test engines, and time.
result would be expected to fall about one time in twenty.
NOTE 8—“Intermediate precision” is the appropriate term for this test
14.2 Bias—No estimate of bias for this test method is
method, instead of “repeatability,” which defines more rigorous within-
possible because the performance results for an oil are deter-
laboratory conditions.
minedonlyunderspecificconditionsofthetestandnoabsolute
14.1.1.1 Intermediate Precision Limit (i.p.)—The difference
standards exist.
between two results obtained under intermediate precision
conditions that would, in the long run, in the normal and
15. Keywords
correct conduct of the test method, exceed the values shown in
Table 2 in only one case in twenty. When only a single test
15.1 abrasive wear; adhesive wear; bearing failure; final
resultisavailable,theIntermediatePrecisionLimitcanbeused
drive axle; gear; gear failure; hypoid axle; L-37; lubricants;
tocalculatearange(testresult 6IntermediatePrecisionLimit)
surface fatigue
outside of which a second test result would be expected to fall
about one time in twenty.
TABLE 2 Reference Oil Test Precision Data
NOTE 1—These statistics are based on the L-37 Standard version test results obtained on Test Monitoring Center Reference Oils 151-2, 151-3, 152,
152-1, 153, 153-1, 155, and 155-1 as of June 2015. There are no statistics for the Canadian version test at this time.
Legend:
S = intermediate precision standard deviation,
i.p.
i.p. = intermediate precision,
S = reproducibility standard deviation, and
R
R = reproducibility.
A A
Hardware Type Variable S i.p. S R
i.p. R
Lubrited Pinion ridging, merit 1.482 4.150 1.482 4.150
Pinion rippling, merit 0.580 1.624 0.594 1.663
Pinion pitting/spalling, merit 0.728 2.038 0.753 2.108
Pinion wear, merit 0.571 1.599 0.589 1.649
Non-lubrited Pinion ridging, merit 0.649 1.817 0.676 1.893
Pinion rippling, merit 0.551 1.543 0.577 1.616
Pinion pitting/spalling, merit 0.818 2.290 0.818 2.290
Pinion wear, merit 0.683 1.912 0.683 1.912
A
This value is obtained by multiplying the standard deviation by 2.8.
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D6121 − 19a
ANNEXES
(Mandatory Information)
A1. ASTM TEST MONITORING CENTER ORGANIZATION
A1.1 The Test Monitoring Center (TMC), an affiliate of vested in the ASTM Test Monitoring System Executive
ASTM International, is a nonprofit organization located at 203 Committee, whose members are elected by Subcommittee
Armstrong Drive, Freeport, PA 16229. It is staffed to admin-
D02.B0. The TMC operates under its associated bylaws and
ister engineering studies; conduct laboratory visits; perform
regulations, the bylaws of Committee D02 and of Subcommit-
statistical analyses of test data; to blend, store, and ship
tee D02.B0, and the Rules and Regulations of theASTM Test
reference oils; and to provide associated administrative func-
Monitoring System. The operating income of the TMC is
tions connected with the referencing and calibration of various
obtainedfromfeesleviedonthereferenceoilssuppliedandon
lubricanttests.TheTMCmaintainsacloseconnectionwithtest
test reviews. These fees are set by the Test Monitoring Center
sponsors, test developers, the surveillance panels, and the
Board of Directors.
testing laboratories. The management of these functions is
A2. ASTM TEST MONITORING CENTER: CALIBRATION PROCEDURES
A2.1 Reference Oils—These oils are formulated or selected A2.4 Analysis of Reference Oil—Unless specifically autho-
to represent specific chemical, or performance levels, or both. rized by the TMC, do not analyze TMC reference oils, either
Theyareusuallysupplieddirectlytoatestinglaboratoryunder
physicallyorchemically.DonotresellASTMreferenceoilsor
codenumberstoensurethatthelaboratoryisnotinfluencedby
supply them to other laboratories without the approval of the
prior knowledge of acceptable results in assessing test results.
TMC. The reference oils are supplied only for the intended
The TMC determines the specific reference oil the laboratory
purpose of obtaining calibration under the ASTM Test Moni-
shall test.
toring System.Any unauthorized use is strictly forbidden. The
testing laboratory tacitly agrees to use the TMC reference oils
A2.1.1 Reference Oil Data Reporting—Test laboratories
that receive reference oils for stand calibration shall submit exclusively in accordance with the TMC’s published Policies
datatotheTMConeverysampleofreferenceoiltheyreceive. for Use andAnalysis ofASTM Reference Oils, and to run and
If a shipment contains any missing or damaged samples, the
report the reference oil test results according to TMC guide-
laboratory shall notify the TMC immediately.
lines. Additi
...