1、Designation: D1264 11Standard Test Method forDetermining the Water Washout Characteristics ofLubricating Greases1This standard is issued under the fixed designation D1264; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 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 Department of Defense.1. Scope*1.1 This test method covers the evaluat
3、ion of the resistanceof a lubricating grease to washout by water from a bearing,when tested at 38 and 79C (100 and 175F) under theprescribed laboratory conditions. It is not to be considered theequivalent of service evaluation tests. This test method may notbe suitable for some greases containing hi
4、ghly volatile com-ponents. Precision and bias was determined using greaseranging from NLGI 3 to 0 grades in the research report (seeSection 10).1.2 The values state in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purpo
5、rt to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user this standard to establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior to use. For specific warningstatements, see 6.3.2. Referenced
6、 Documents2.1 ASTM Adjuncts:Standard Ball Bearing2D2PP, Version 4.43, Determination of Precision and BiasData for Use in Test Methods for Petroleum Products33. Summary of Test Method3.1 The grease is packed into a ball bearing, the bearing isthen inserted in a housing with specified clearances, andr
7、otated at 600 6 30 rpm. Water, controlled at the specified testtemperature, impinges on the bearing housing at a rate of 5 60.5 mL/s. The amount of grease washed out in 60 6 1 min isa measure of the resistance of the grease to water washout.4. Significance and Use4.1 This test method estimates the r
8、esistance of greases towater washout from ball bearings under conditions of the test.No correlation with field service has been established.5. Apparatus5.1 Ball Bearing, ASTM test bearing size 6204 (seeADJD3336).25.2 Bearing Housing and Shield with dimensions as shownin Fig. 1.5.3 Reservoir, Bearing
9、-Housing Mount, Circulating Pump,and Drive Motor, similar or equivalent to those shown in Fig.1.5.4 Heating Source, to maintain the water temperature at38C 6 1.7C (100F 6 3F) or 79C 6 1.7C (174F 6 3F).NOTE 1Suitable temperature control may be obtained by the use ofimmersion heaters, steam coils, or
10、infrared heat lamps, in conjunction withtransformers or thermostats.5.5 Thermometer or Thermocouple, to determine the tem-perature of the water reservoir.6. Materials and Reagents6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thata
11、ll reagents shall conform to the specifications of the commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.4Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessen
12、ing theaccuracy of the determination.6.2 Distilled Water.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.G0.06 on Functional Tests - Contamination.Current edition approved May 1, 2011. Published
13、 May 2011. Originallyapproved in 1953. Last previous edition approved in 2008 as D126403(2008).DOI: 10.1520/D1264-11.2Available from ASTM International Headquarters. Order Adjunct No.ADJD3336. Original adjunct produced in 1984.3ADJD6300 is no longer available.4Reagent Chemicals, American Chemical So
14、ciety Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the testing of reagents notlisted by the American Chemical Society, see Annual Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacop
15、eial Convention, Inc. (USPC), Rockville,MD.1*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.6.3 Cleaning SolventCapable of sufficiently cleaning thetest bearing for use
16、 in the test. Either reagent grade Stoddardsolvent, also known as Mineral Spirits, (WarningCombustible. Vapor harmful), or American Chemical Societyreagent grade n-heptane4(WarningFlammable. Harmful ifinhaled) has been found suitable for use.7. Preparation of Apparatus7.1 Clean the reservoir and wat
17、er passages by flushing withdistilled water. Wipe off any oil scum which has been depositedon the surfaces of the reservoir. Clean the test bearing withcleaning solvent (see 6.3).in. mm in. mm F C0.010 0.25 0.875 22.22 100 6 3386 1.70.015 0.38 0.938 23.81 174 6 3796 1.70.031 0.79 214 57.118 3.18 6 1
18、52532 3.97316 4.7614 6.35FIG. 1 Water Washout Characteristics of Lubricating Grease ApparatusD1264 1128. Procedure8.1 Pack the tared bearing with 4.00 6 0.05 g of test grease.Insert the bearing and tared shields into the housing, andassemble the unit in the test apparatus.8.2 Add a minimum of 750 mL
19、 of preheated distilled waterto the reservoir, but keep the water level below the bearinghousing. Without starting the bearing, start the water circulat-ing pump while diverting the water spray from the housing bymeans of a piece of tubing attached to the capillary dischargetube or with a deflecting
20、 metal shield until equilibrium tem-perature is attained. When the test is to be made at the testtemperatures of 38C 6 1.7C (100F 6 3F) or 79C 6 1.7C(174F 6 3F), it will be necessary to heat the water to thespecified temperature by a previously selected source of heat.8.2.1 If the rig has one motor
21、driving both pump and testbearing, remove the belt from the test bearing spindle pulleyduring water warm-up time.8.3 When the water reaches the specified temperature,adjust the bypass valve to give a water-flow rate, through therubber tubing and into a glass graduate, of 5 6 0.5 mL/s (Note2). Remove
22、 the rubber tubing from the capillary dischargetube, and adjust the water jet so that it impinges on the endplate 6 mm (14 in.) above the outer opening of the bearinghousing. Start the bearing.NOTE 2Sufficient experience should be obtained with a particulartester to make sure that the water-flow rat
23、e can be maintained within thespecified limits for a 60 6 1 min test run.8.4 With the bearing operating at a speed of 600 6 30 rpm,continue the operation for 60 6 1 min.8.5 Shut off the motor and heating source, if used. Removethe test bearing and shields and place them on a tared watchglass, with t
24、he shields being separated from the bearing andplaced with their inner faces upward to expose the wet greaseto the air.8.6 Dry the bearing and shields for 15 6 0.25hat776 6C(170 6 10F), and then weigh to determine the grease loss(Note 3). The grease remaining on the shields, and any leakageoccurring
25、 during the drying period, should not be considered asgrease lost. Duplicate tests shall be run.NOTE 3Some weight loss may be experienced for greases containinghighly volatile oils because of evaporation during drying.NOTE 4Some greases may contain components which make it diffi-cult to completely d
26、ry the sample at 77 6 6C (170 6 10F). For thosegreases, the drying temperature may be increased to 93 6 3C (200 65F) to facilitate removal of water during the time specified.9. Report9.1 Report the average of duplicate tests as the percentageweight of grease washed out at the test temperature, andin
27、dicate the temperature at which the bearing assembly andgrease were dried.10. Precision and Bias510.1 The precision of this test method was obtained usingADJD6300 (D2PP).310.2 RepeatabilityThe difference between successive re-sults obtained by the same operator with the same apparatusunder constant
28、operating conditions on identical test materialwould, in the long run, in the normal and correct operation ofthe test method, exceed the following values only in one casein twenty.Repeatability38C r = 0.8 (X +2)79C r = 0.6 (X + 4.6)where: X is the average of two results in %.10.2.1 Reproducibility T
29、he difference between two singleand independent results obtained by different operators work-ing in different laboratories on identical test material would, inthe long run, exceed the following values only in one case intwenty.Reproducibility38C R = 1.4 (X +2)79C R = 1.1 (X + 4.6)where: X is the ave
30、rage of two results in %.10.3 BiasThe procedure in this test method has no biasbecause the value of grease washout can be defined only interms of a test method.11. Keywords11.1 grease; washout; waterSUMMARY OF CHANGESSubcommittee D02.G0.06 has identified the location of selected changes to this stan
31、dard since the last issue(D126403(2008) that may impact the use of this standard.(1) Revised 1.1.(2) Added test temperature tolerance for the lower test tem-perature to 5.4 and 8.2.(3) Revised metric equivalents in Fig. 1 to correct significantfigures, since Fahrenheit information is not required to
32、 con-form to significant figures when converting to degrees Fahren-heit from degrees Celsius.5Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1272 and RR:D02-1434.D1264 113ASTM International takes no position respecting the v
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34、ubject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headq
35、uarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This stan
36、dard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D1264 114
