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Singlerowdeepgrooveballbearings…………289Singlerowdeepgrooveballbearingswithfillingslots………………………………361Stainlesssteeldeepgrooveballbearings……373Doublerowdeepgrooveballbearings………391Singlerowcamrollers………………………399287Deepgrooveballbearings289SinglerowdeepgrooveballbearingsDesigns…………………………………………………………………………………………290Basicdesignbearings………………………………………………………………………290Sealedbearings……………………………………………………………………………290ICOSTMoilsealedbearingunits……………………………………………………………293Bearingswithsnapringgroove……………………………………………………………294Matchedbearingpairs………………………………………………………………………294SKFExplorerclassbearings…………………………………………………………………295Bearingdata–general………………………………………………………………………296Dimensions…………………………………………………………………………………296Tolerances……………………………………………………………………………………296Internalclearance……………………………………………………………………………296Misalignment………………………………………………………………………………296Cages…………………………………………………………………………………………298Minimumload………………………………………………………………………………298Axialloadcarryingcapacity………………………………………………………………299Equivalentdynamicbearingload…………………………………………………………299Equivalentstaticbearingload……………………………………………………………299Supplementarydesignations………………………………………………………………300Producttables…………………………………………………………………………………302Singlerowdeepgrooveballbearings……………………………………………………302Sealedsinglerowdeepgrooveballbearings……………………………………………324ICOS™oilsealedbearingunits……………………………………………………………348Singlerowdeepgrooveballbearingswithsnapringgroove……………………………350Singlerowdeepgrooveballbearingswithsnapringgrooveandshields………………356Singlerowdeepgrooveballbearingsareparticularlyversatile.Theyaresimpleinde-sign,non-separable,suitableforhighandevenveryhighspeedsandarerobustinoperation,requiringlittlemaintenance.Deepracewaygroovesandthecloseconformitybetweentheracewaygroovesandtheballsenabledeepgrooveballbearingstoaccom-modateaxialloadsinbothdirections,inadditiontoradialloads,evenathighspeeds.Singlerowdeepgrooveballbearingsarethemostwidelyusedbearingtype.Conse-quently,theyareavailablefromSKFinmanyexecutionsandsizes:•openbasicdesignbearings•sealedbearings•ICOSTMoilsealedbearingunits•bearingswithsnapringgroove,withorwithoutsnapringOtherdeepgrooveballbearingsforspecialapplications,showninthesections“Engineeringproducts”and“Mechatronics”include•hybridbearings(page891)•insulatedbearings(page905)•hightemperaturebearings(page917)•bearingswithSolidOil(page945)•sensorizedbearings(page953)TheSKFproductrangealsoincludesinch-sizebearingsandbearingswithataperedbore.ThesevariantsarenotincludedinthisGeneralCatalogue.Informationwillbeprovidedonrequest.Singlerowdeepgrooveballbearings290DesignsBasicdesignbearingsBasicdesignSKFsinglerowdeepgrooveballbearings(fig)areopen(unsealed).Formanufacturingreasons,thosesizesofopenbearingthatarealsoproducedinsealedorshieldedversionsmayhavesealrecessesintheouterring.SealedbearingsThemostpopularsizesofdeepgrooveballbearingsarealsoproducedinsealedversionswithshieldsorcontactsealsononeorbothsides.Detailsregardingthesuitabilityofthedifferentsealsforvariousoperatingcondi-tionswillbefoundintable.Sealedbear-ingsinthewide622,623and630seriesareparticularlysuitableforlongmaintenance-freeservice.Inaddition,ICOSbearingunitswithintegratedradialshaftsealsareavail-ableforhighersealingrequirements.Thebearingswithshieldsorsealsonbothsidesarelubricatedforlifeandaremainten-ance-free.Theyshouldnotbewashedorheatedtotemperaturesabove80°C.Depend-ingontheseriesandsize,deepgrooveballbearingsaresuppliedchargedwithoneofthreestandardgreases:•LT10greaseforbearingsinthe8and9DiameterSeriesuptoandincluding30mmoutsidediameter,111Fig•MT47greaseforbearingsinthe8and9DiameterSeriesabove30mmuptoandincluding62mmoutsidediameterandforbearingsinthe0,1,2and3DiameterSeriesuptoandincluding62mmoutsidediameter,•MT33greaseforallbearingsabove62mmoutsidediameter.Characteristicsoftheabovestandardgreasesarelistedintable.Thestandardgreaseisnotidentifiedinthebearingdesig-nation.Thequantityofgreasefillssome25to35%ofthefreespaceinthebearing.Tospecialorder,othergreasefillinggradesareavailable.Alsoonrequest,specialgreasefills(table)canbesupplied22•hightemperaturegreaseGJNforbearingsuptoandincluding62mmoutsidediameter•hightemperaturegreaseHT22forbearingsabove62mmoutsidediameter•lowtemperaturegreaseLT20•widetemperaturerangegreaseGWB•widetemperaturerangeandsilentrunninggreaseLHT23291SealselectionguidelinesRequirementShieldsLow-frictionsealsContactsealsZRSLRZRSHRS1Lowfriction++++++++ooHighspeeds+++++++++ooGreaseretentiono+++++++++Dustexclusiono+++++++++Waterexclusionstatic−o−+++++dynamic−o−++highpressure−o−+++oSymbols:+++excellent++verygood+goodofair–notrecommended1TableSKFgreasefillingforsealeddeepgrooveballbearingsTechnicalStandardgreasesSpecialgreasesspecificationsLT10MT47MT33GJNHT22LT20GWBLHT23ThickenerLithiumLithiumLithiumPolyureaLithiumLithiumPolyureaLithiumsoapsoapsoapsoapcomplexsoapsoapsoapsoapBaseoiltypeDiesteroilMineraloilMineraloilMineraloilMineraloilDiesteroilEsteroilEsteroilNLGIconsistency2232322–32classOperating−50to+90−30to+110−30to+120−30to+150−20to+140−55to+110−40to+160−50to+140temperature,°CBaseoilvisco