ASTM_D_6121_-_19ae1.pdf

Designation:D612119a1Standard Test Method forEvaluation of Load-Carrying Capacity of Lubricants UnderConditions of Low Speed and High Torque Used for FinalHypoid Drive Axles1This standard is issued under the fixed designation D6121;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially updated TMC governance information in June 2022.INTRODUCTIONThis test method is written for use by laboratories that use the portions of the test method that referto ASTM Test Monitoring Center(TMC)services(see Annex A1 Annex A4).Laboratories thatchoose not to use the TMC services may simply disregard these portions.The TMC provides reference oils,and engineering and statistical services to laboratories that desireto produce test results that are statistically similar to those produced by laboratories previouslycalibrated by the TMC.In general,the Test Purchaser decides if a calibrated test stand is to be used.Organizations such astheAmerican Chemistry Council require that a laboratory utilize the TMC services as part of their testregistration process.In addition,the American Petroleum Institute and the Gear Lubricant ReviewCommittee of the Lubricant Review Institute(SAE International)require that a laboratory use theTMC services in seeking qualification of oils against their specifications.NOTE1The advantage of using the TMC services to calibrate test stands is that the test laboratory(and hence theTest Purchaser)has an assurance that the test stand was operating at the proper level of test severity.It should also beborne in mind that results obtained in a non calibrated test stand may not be the same as those obtained in a test standparticipating in the ASTM TMC services process.1.Scope*1.1 This test method is commonly referred to as the L-37test.2This test method covers a test procedure for evaluatingthe load-carrying,wear,and extreme pressure properties of agear 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 lowaxle temperature(Canadian)L-37 test.The procedure for thelow axle temperature(Canadian)L-37 test is identical to thestandard L-37 test with the exceptions of the items specificallylisted in Annex A9.The procedure modifications listed inAnnex A9 refer to the corresponding section of the standardL-37 test method.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3.1 ExceptionsIn Table A12.1,the values stated in SIunits are to be regarded as standard.Also,no SI unit isprovided where there is not a direct SI equivalent.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific warning information is given in Sections 4 and 7.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0.03 on Automotive Gear Lubricants&Fluids.Current edition approved Nov.1,2019.Published November 2019.Originallyapproved in 1997.Last previous edition approved in 2019 as D6121 19.DOI:10.1520/D6121-19AE01.2Until 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.19-2.Information Lettersmay 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.11.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Clea