【英文标准名称】:StandardTestMethodforLow-TemperatureTorqueofBallBearingGrease
【原文标准名称】:滚珠轴承润滑脂的低温扭矩用标准试验方法
【标准号】:ASTMD1478-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.G0.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:滚珠轴承润滑脂;滚珠轴承扭矩;低温扭矩;润滑脂;扭矩
【英文主题词】:ballbearinggrease;ballbearingtorque;low-temperaturetorque;lubricatinggrease;torque
【摘要】:Thistestmethodwasdevelopedusinggreaseshavingverylowtorquecharacteristicsatx2212;54x00B0;C(x2212;65x00B0;F).Specificationsforgreasesofthistypecommonlyrequiretestingatthistemperature.Specificationsforgreasesofothertypescanrequiretestingattemperaturesfromx2212;75tox2212;20x00B0;C(x2212;100to0x00B0;F).Thistestmethodhasprovedhelpfulintheselectionofgreasesforlow-poweredmechanisms,suchasinstrumentbearingsusedinaerospaceapplications.Thesuitabilityofthistestmethodforotherapplicationsrequiringdifferentgreases,speeds,andtemperaturesshouldbedeterminedonanindividualbasis.TestMethodD4693maybebettersuitedforapplicationsusinglargerbearingsorgreaterloads.However,greaseshavingsuchcharacteristicsthatpermittorqueevaluationsbyeitherthistestmethodorTestMethodD4693willnotgivethesamevaluesinthetwotestmethods(evenwhenconvertedtothesametorqueunits)becausetheapparatusandtestbearingsaredifferent.1.1Thistestmethodcoversthedeterminationoftheextenttowhichagreaseretardstherotationofaslow-speedballbearingbymeasuringstartingandrunningtorquesatlowtemperatures(belowx2212;20x00B0;C(0x00B0;F)).1.1.1Torquemeasurementsarelimitedbythecapacityofthetorque-measuringequipment.Note18212;Wheninitiallydeveloped,theoriginaldynamometerscalelimitedthetorquecapacitytoapproximately30000gx00B7;cm;theoriginaldynamometerscaleisobsolete,however.Thesuggestedreplacementscalehasnotbeenevaluated;itcouldextendthelimittoapproximately75000gx00B7;cm.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.Theexceptionistorquevaluesthataregivenincgs-metricunits,whichareuniversallyusedingreasespecifications.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardandwarningstatements,see6.1.1,7.2,7.4,8.7,and8.11.
【中国标准分类号】:
【国际标准分类号】:75_100
【页数】:7P.;A4
【正文语种】: