1、Designation:D612115aStandard 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 o
2、foriginal 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.INTRODUCTIONThis test method is written for use by laboratories that use the
3、 portions of the test method that refertoASTM Test Monitoring Center(TMC)services(see AnnexA1).Laboratories that choose not to usethe TMC services may simply disregard these portions.The TMC provides reference oils,and engineering and statistical services to laboratories that desireto produce test r
4、esults 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 thei
5、r 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 t
6、he 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 ob
7、tained 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 condition
8、s 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
9、 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
10、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 theresp
11、onsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific warninginformation is given in Sections 4 and 7.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum
12、 Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0.03 on Automotive Gear Lubricants&Fluids.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 1997.Last previous edition approved in 2015 as D6121 15.DOI:10.1520/D6121-15A.2Until t
13、he 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.151.Information Lettersmay be obtained from the ASTM Test Monitoring Center,6555 Penn Ave,Pittsbur
14、gh,PA 15206,Attn:Administrator.The TMC is also the source of referenceoils.*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 States1 2.Referenced Documents2.1 ASTM Standards:3D235 Spe
15、cification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Military Specification:4MIL-PRF-2105E Lubricating Oil,Gear,Multipurpose2.3 AGMA National Standard:5Nomenclature of
16、Gear Tooth Failure Modes2.4 SAE Standard:6SAE J308 Information Report on Axle and Manual Trans-mission LubricantsSAE J2360 Lubricating Oil,Gear Multipurpose(Metric)Military Use3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 abrasive wear,non ring and pinion gears,removalof material from the operating surface of the gear caused bylapping of mating surfaces by fine particles suspended inlubricant,fuel,or air or imbedded in a surface.ASTM Distress Rating Manual No.2173.1.2 adh
