ASTM D6121-16
(Test Method)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
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 and health practices and determine the applicability of regulatory limitations prior to use. Specific warning information is given in Sections 4 and 7.
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Designation: D6121 − 16
StandardTest Method for
Evaluation of Load-Carrying Capacity of Lubricants Under
Conditions of Low Speed and High Torque Used for Final
1
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.
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
2
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
1.2 Thistestmethodalsoprovidesfortherunningofthelow as standard. The values given in parentheses are mathematical
axle temperature (Canadian) L-37 test. The procedure for the conversions to SI units that are provided for information only
and are not considered standard.
1
This test method is under the jurisdiction of ASTM Committee D02 on
1.3.1 Exceptions—In Table A12.1, the values stated in SI
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
units are to be regarded as standard. Also, no SI unit is
Subcommittee D02.B0.03 on Automotive Gear Lubricants & Fluids.
provided where there is not a direct SI equivalent.
Current edition approved April 1, 2016. Published April 2016. Originally
approved in 1997. Last previous edition approved in 2015 as D6121–15a. DOI:
1.4 This standard does not purport to address all of the
10.1520/D6121-16.
2
safety concerns, if any, associated with its use. It is the
Until the next revision of this test method, the ASTM Test Monitoring Center
(TMC) will update changes in this test method by means of Information Letters.
responsibility of the user of this standard to establish appro-
This edition includes all Information Letters through No. 15–2. Information Letters
priate safety and health practices and determine the applica-
may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave,
bility of regulatory limitations prior to use. Specific warning
Pittsburgh, PA15206,Attn:Administrator.TheTMC is also the source of reference
oils. 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
---------------------- Page: 1 ----------------------
D6121 − 16
2. Referenced Documents face/crown edge interface is to be called chipping, not
3 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 ac
...
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: D6121 − 15a D6121 − 16
Standard Test Method for
Evaluation of Load-Carrying Capacity of Lubricants Under
Conditions of Low Speed and High Torque Used for Final
1
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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 A1Annex A1 – Annex A4). Laboratories
that choose not to use the TMC services may simply disregard these portions.
The TMC provides reference oils, and engineering and statistical services to laboratories that desire
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
the American Chemistry Council require that a laboratory utilize the TMC services as part of their test
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*
2
1.1 This test method is commonly referred to as the L-37 test. 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 and health practices and determine the applicability of regulatory
limitations prior to use. Specific warning information is given in Sections 4 and 7.
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 Subcommittee
D02.B0.03 on Automotive Gear Lubricants & Fluids.
Current edition approved Oct. 1, 2015April 1, 2016. Published October 2015April 2016. Originally approved in 1997. Last previous edition approved in 2015 as
D6121 – 15.D6121 – 15a. DOI: 10.1520/D6121-15A.10.1520/D6121-16.
2
Until the next revision of this test method, the ASTM Test Monitoring Center (TMC) will update changes in this test method by means of Information Letters. This edition
includes all Information Letters through No. 15–1.15–2. Information Letters may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave, Pittsburgh, PA 15206,
Attn: Administrator. The TMC is also the source of reference oils.
*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
---------------------- Page: 1 ----------------------
D6121 − 16
2. Referenced Documents
3
2.1 ASTM Standards:
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbo
...
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