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NeedleRollerCagesforBigEndKT…EGthepurposeofusingTheserollercagesaresubjectedtoaccelerationanddecelerationduringtheirrotatingandepicyclicmotionduetocrankshaftrotation.Towithstandsuchcondi-tions,theyaremadeofaspecialalloyandarelight-weightwithhighrigidity.Theyareguidedontheirouterperipherysurfacewithsuperiorlubricatingproperties.Forthemunderseverecondi-tionssuchashighrotationalspeedandstringentlubri-cation,bearingsplatedwithnon-ferrousmetalsarealsoavailableonrequest.High-loadcapacityandhigh-rigiditycagestobeusedforracingmotorcycles(Seethephotobellow.),splitneedlecagestypecrank-shaftsandotherspecialspecificationcagesofvarioustypesarealsoavailable.IKOwhenrequired.forsolid(one-piece)PleaseconsultHigh-loadcapacityandhigh-rigiditycage KTZ … EGExamplesofidenticationnumberModelcodeDimensionsSupplementalcodeKT222816EGB2TypeofbearingRollersetborediameter(22mm)Rollersetoutsidediameter(28mm)Widthofcage(16mm)Toleranceofmeanvalueofrollerdia.(SeeTable2.)■AccuracyThediametertolerancesofneedlerollersofNeedleRollerCagesforEngineConnectingRodsareclassi-fiedasshowninTable2.Whentheclassificationsymbolisnotindicatedintheidentificationnumber,theclassificationsymbol"B2"isapplied.ThetoleranceofthecagewidthBcis-0.2〜-0.4mm.ButcageswithmarksintheBccolumninthedimensiontablesaremanufacturedwiththefollowingwidthtolerances.NeedleRollerCagesforSmallEndKTV…EG●:0〜-0.2mm■:-0.1〜-0.3mmTheserollercagesoscillatesathighspeedswithinalimitedloadingzoneunderheavyshockloads.Thus,thesecagesaredesignedtobelightweightandhavehighrigiditywithawell-balancedstructure.Inthesecages,anumberofneedlerollershavingasmalldiameterareincorporatedtoreducetherollingcon-tactstressintheloadingzone.NeedleRollerCagesforSmallEndareclassifiedintotwotypes,theoutersurfaceguidetypeandtheinnersurfaceguidetype.Thisclassificationisshowninthetableofdimensions.Intheoutersurfaceguidetype,thecageisguidedbytheslidingcontactbetweeninnersurfaceoftheconnectingrodandtheoutersurfaceofthecage.Intheinnersurfaceguidetype,thecageisguidedbytheslidingcontactbetweentheoutersurfaceofthepinandtheinnersurfaceofthecage.the■IdentificationNumberTheidentificationnumberofNeedleRollerCagesforEngineConnectingRodsconsistsofamodelcode,dimensionsandanysupplementalcodesasshownbelow.C19Table2Tolerancesofneedlerollerdiameterunit:μmClassClassificationsymbol(1)Toleranceofmeanvalueofrollerdia.(2)StandardSemi-standardB2B4B6B8B100〜- 2-2〜- 4-4〜- 6-6〜- 8-8〜-10Notes(1) Theclassificationsymbolisindicatedattheendoftheidentificationnumber.(2) TolerancesforcircularityarebasedonJISB1506(Rollingbearings-Rollers).■ClearanceRadialinternalclearancesareselectedaccordingtothetypeofengineandtheoperatingconditions(rota-tionalspeed,load,lubricatingconditions,etc.).Ifabearingisusedwithaninadequateclearance,bearingflakingandnoisetroublessuchasseizure,earlyfailure.increasemayoccur,Therefore,theclearancecarefullyaccordingtotestresultsandexperience.toanengineisnecessarytoselectleadingit
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