1、Designation:D 1263 94(Reapproved 2005)e1An American National StandardStandard Test Method forLeakage Tendencies of Automotive Wheel Bearing Greases1This standard is issued under the fixed designation D 1263;the number immediately following the designation indicates the year oforiginal adoption or,in
2、 the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.e1NOTEWarning note
3、s were editorially moved into text in May 2005.1.Scope1.1 This test method covers the evaluation of the leakagetendencies of wheel bearing greases when tested under pre-scribed laboratory conditions.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses a
4、re for informationonly.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to
5、 use.For specific hazardinformation see 8 and Annex A2.2.Referenced Documents2.1 ASTM Standards:2D 217 Test Methods for Cone Penetration of LubricatingGreaseD 3527 Test Method for Life Performance of AutomotiveWheel Bearing GreaseD 4175 Terminology Relating to Petroleum,PetroleumProducts,and Lubrica
6、ntsD 4290 Test Method for Determining the Leakage Tenden-cies of Automotive Wheel Bearing Grease under Acceler-ated ConditionsE 1 Specification for ASTM Liquid-In-Glass ThermometersE 77 Test Method for Inspection and Verification of Ther-mometers3.Terminology3.1 Definitions:3.1.1 lubricating grease,
7、na semi-fluid to solid product ofa dispersion of a thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredients arecommonly included to impart special prope
8、rties.D 2173.1.2 lubricant,nany material interposed between twosurfaces that reduces the friction or wear between them.D 41753.1.3 thickener,nin lubricating grease,a substance com-posed of finely-divided particles dispersed in a liquid lubricantto form the products structure.3.1.3.1 DiscussionThe so
9、lid thickener can be fibers(suchas various metallic soaps)or plates or spheres(such as certainnon-soap thickeners)which are insoluble or,at the most,onlyvery sightly soluble in the liquid lubricant.The generalrequirements are that the solid particles be extremely small,uniformly dispersed,and capabl
10、e of forming a relatively stable,gel-like structure with the liquid lubricant.D 2173.2 Definitions of Terms Specific to This Standard:3.2.1 automotive wheel bearing grease,na lubricatinggrease specifically formulated to lubricate automotive wheelbearings at relatively high grease temperatures and be
11、aringspeed.D 35273.2.2 leakage,nof wheel bearing grease,separation andoverflow of grease or oil from the bulk grease charge,inducedby high temperature and bearing rotation.D 42904.Summary of Test Method4.1 The grease is distributed in a modified front-wheel huband spindle assembly.The hub is rotated
12、 at a speed of 660 630 rpm for 6 h 6 5 min,at a spindle temperature which israised to and then maintained at 105 6 1.2C(220 6 2.5F).Leakage of grease or oil,or both,is measured,and thecondition of the bearing surface is noted at the end of the test.5.Significance and Use5.1 The test method provides
13、a screening device that per-mits differentiation among products having distinctly differentleakage characteristics(Note 1).It is not the equivalent of1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of Subcommittee
14、D02.G0 on Lubricating Grease.Current edition approved May 1,2005.Published May 2005.Originallyapproved in 1953.Last previous edition approved in 1999 as D 1263 94(1999).2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Bo
15、ok of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.longtime service tests,nor is it intended to distinguish betweenwheel bearing greases s
16、howing similar or borderline leakage.NOTE1It is possible for skilled operators to observe significantchanges in other important grease characteristics that occurred during thetest.Such additional information can be of special interest to individualoperators.The observations,however,are subject to differences inpersonal judgment among operators,and cannot be used effectively forquantitative rating.6.Apparatus6.1 The apparatus shown in Fig.1 and Fig.2 has been foundsuitable and is described in det
