1、Designation:D333605(Reapproved 2015)Standard Test Method forLife of Lubricating Greases in Ball Bearings at ElevatedTemperatures1This standard is issued under the fixed designation D3336;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers
3、the evaluation of the perfor-mance of lubricating greases in ball bearings operating underlight loads at high speeds and elevated temperatures.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are prov
4、ided for information onlyand are not considered standard.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
5、of regulatory limitations prior to use.For specificwarning statements,see 8.1.2.Referenced Documents2.1 ASTM Standards:2A600 Specification for Tool Steel High Speed2.2 ABMA Standard:3Standard 4,Tolerance Definitions and Gaging Practices forBall and Roller Bearings2.3 ASTM Adjuncts:Standard Ball Bear
6、ings(set of five)43.Summary of Test Method3.1 A grease lubricated SAE No.204 size ball bearing isrotated at 10 000 r/min under light load at a specified elevatedtemperature.Tests are continued until failure or completion ofa specified number of hours of running time.4.Significance and Use4.1 This te
7、st method can be used to evaluate the ability ofgrease to provide adequate lubrication for extended periods ofball bearings operating under light loads at high speeds andelevated temperatures.5.Apparatus5,65.1 Test Spindle7(see Figs.1-4),capable of operating atspeeds of 10 000 r min and temperatures
8、 as high as 371 C(700 F).The test bearing seat dimension shall be 19.99 mm to20.00 mm(0.7870 in.to 0.7874 in.).For spindles having thetest bearing and the support bearing in the same housing(CRCType,Figs.1-3)(Note 2)the internal construction of thespindle shall be such that the outboard support bear
9、ing,or bothbearings are free to float axially in the housing.In designswhere both bearings are free to float,the spindle shaft shallhave a 0.508 mm to 0.762 mm(0.020 in.to 0.030 in.)free axialmovement or end play.The outboard bearing seat dimensionshould be 19.99 mm to 20.00 mm(0.7870 in.to 0.7874 i
10、n.).5.1.1 The test unit design(Fig.1 and Fig.2)should be suchthat a finger spring washer produces a 22 N to 67 N(5 lbf to15 lbf)thrust load on the floating outboard support bearing.8,65.2 Bearing Housing:5.2.1 For CRC Type SpindlesThe bearing housing diam-eter shall be 47.005 mm to 47.021 mm(1.8506
11、in.to1.8512 in.)to give proper bearing mounting.Construction shallbe such that the test bearing is equipped with flush spacers orshields to confine the grease to the bearing.The spacers or1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubrican
12、ts and is the direct responsibility ofSubcommittee D02.G0.05 on Functional Tests-Temperature.Current edition approved Oct.1,2015.Published December 2015.Originallyapproved in 1975.Last previous edition approved in 2010 as D3336 05(2010).DOI:10.1520/D3336-05R15.2For referenced ASTM standards,visit th
13、e ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Bearing Manufacturers Assoc.,2025 M St.,NW,Ste800,Washington,DC 20036.4Available
14、 from ASTM International Headquarters.Order Adjunct No.ADJD3336.Original adjunct produced in 1984.5Complete apparatus is available from Falex Corp.,1020 Airpark Dr.,SugarGrove,IL 60554.6If you are aware of alternative suppliers,please provide this information toASTM International Headquarters.Your c
15、omments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.7Pope Machinery Corporation Grease Test Spindles No.P-1911 or P-6301A-HT(Fig.1)and No.P-7605-B(Fig.2);and Falex Corp.spindles of the type shown inFig.1 and Fig.2 have been found sati
16、sfactory for this purpose.8The sole source of supply of the apparatus known to the committee at this timeis Falex Part No.643-187-070,Falex Corp.1020 Airpark Dr.,Sugar Grove,IL60554.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 shields shall have a clearance between the inside diameter andthe shaft of 0.127 mm to 0.178 mm(0.005 in.to 0.007 in.)perside.NOTE1This type of spindle is described in CRC Research Techniquefor the Determinat