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Designof Bearing LocationSealing of Bearing Arrangements<strong>General</strong>Rolling bearings are high precision machineelements that are produced with tolerances ofclose microns [μm].For an optimum function they have super finishedrunning surfaces featuring surface roughnessof some 10th microns (0,1 μm).This is why rolling bearings are very sensitiveto damage caused by solid contaminations andimpurities.The efficient sealing of a bearing arrangementis thus one of the major pre-conditions for thesuccessful performance of a rolling bearingarrangement.Seal TypesIn the field of bearing sealing there are manyproven designs and design variations. To providethe optimum solution for each application andspecifi c problems this practical experience shouldalways be considered.For rotary movement, dynamic seals are usuallyused for sealing bearing arrangements.To satisfy the specific problems for each applicationthere are in principle two main differences,namely.- non-contacting seals- contacting (rubbing) sealsFor some applications it may become necessaryto combine both types.Non-Contacting SealsThe principle function of non-contacting sealsis based on the sealing effect of narrow gapsbetween stationary and rotating machinecomponents.In their simplest form, non-contacting sealsare simple, straight gaps as shown in fig. 7.9a.Their effectiveness may be increased by designimprovements up to complex shaped labyrinthseals.Gap seals do not have any contacting parts, theygenerate practically no friction and thus no wearwhich make this type suitable for high speedoperations.The width of sealing gap should be approximately0,1 ÷ 0,3 mm, according to the accuracyof shaft guidance and dependant upon thebearing size.Some compensation of alignment errors betweenshaft and housing may be possible based on theseal arrangement to be used, particularly for selfaligning bearing types (e.g. ball bearings and/orspherical roller bearing).A signifi cant improvement in the effectiveness ofa gap seal may be achieved by grease filling ofthe sealing gaps. By this measure the penetrationof fi ne dust particles may be avoided.A higher efficiency of sealing may also beachieved by a combination of non-contactingseals with sealed or shielded bearings, (suffi xes-Z, -2Z, -RS, -2RS, -RS2, -2RS2, - 2LFS).For variations of non-contacting seals, (see fig 7.8).Fig. 7.8a)A straight gap between shaft and housing coverbuilds the simplest form of a gap seal. Suitablefor grease lubricated bearing applicationsrunning under dry surroundings where less dustmay occur.www.nke.at 313
Designof Bearing LocationExamples for Non-Contacting Seals of Bearing ArrangementsFig. 7.8314www.nke.at
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HauptkatalogGeneral Catalogue
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InhaltContentTechnischer TeilTechni
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InhaltInhaltSeiteEinleitung 1Inhalt
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InhaltInhaltToleranzen der Radialla
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InhaltInhaltSeiteLagerluft und Vors
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InhaltInhaltSeiteEinbau gepaarter u
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InhaltInhaltSeiteAxial-Pendelrollen
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Grundlagen, Bestandteilevon Wälzla
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Grundlagen, Bestandteilevon Wälzla
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LagerbauformenEinteilung der Wälzl
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LagerbauformenSchrägkugellagerEinr
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LagerbauformenZylinderrollenlagerEi
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LagerbauformenZweireihige Kegelroll
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LagerbauformenAxial-Pendelrollenlag
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WälzlagerbezeichnungenAllgemeinesD
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WälzlagerbezeichnungenR . . . Ring
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WälzlagerbezeichnungenNZylinderrol
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WälzlagerbezeichnungenIn der Praxi
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WälzlagerbezeichnungenLager ohne K
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WälzlagerbezeichnungenDie restlich
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WälzlagerbezeichnungenAbb. 3.7 zei
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WälzlagerbezeichnungenSicherungsbl
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LagerdatenallgemeinPolyamidkäfige:
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LagerdatenallgemeinDrehzahleinschr
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LagerdatenallgemeinMaßpläneHaupta
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LagerdatenallgemeinGrenzwerte für
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LagerdatenallgemeinGrenzwerte für
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LagerdatenToleranzenAllgemeinesStan
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LagerdatenToleranzenToleranzen der
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LagerdatenToleranzenBauhöhen der N
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LagerdatenToleranzenToleranzen für
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Gestaltungder LagerstelleIdeale Los
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Gestaltungder LagerstelleAbb. 7.1d)
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Gestaltungder LagerstelleLagerringe
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Gestaltungder LagerstelleWellenpass
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Gestaltungder LagerstelleFormgenaui
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Gestaltungder LagerstelleAbb. 7.2 z
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Gestaltungder LagerstelleEmpfohlene
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Gestaltungder LagerstelleEmpfohlene
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Gestaltungder LagerstelleGehäusepa
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Gestaltungder LagerstelleGehäusepa
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Gestaltungder LagerstelleAusführun
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Gestaltungder LagerstelleBeispiele
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Gestaltungder LagerstelleAnschlussm
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Gestaltungder LagerstelleAbdichtung
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Gestaltungder LagerstelleAbb. 7.8b)
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Gestaltungder LagerstelleAbb. 7.9b)
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Lagerluft undVorspannungAllgemeines
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Lagerluft undVorspannungEinfluss de
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Lagerluft undVorspannungBei größe
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Lagerluft undVorspannungZusammenhan
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Lagerluft undVorspannungAbb. 8.8Nut
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Lagerluft undVorspannungDie Höhe d
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Schmierungvon WälzlagernWahl des S
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Schmierungvon WälzlagernIn vielen
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Schmierungvon WälzlagernArt desVer
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Schmierungvon WälzlagernBei „leb
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Schmierungvon WälzlagernFettführu
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Schmierungvon WälzlagernAsymmetris
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Handling, Einbau und Ausbauvon Wäl
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ContentContentPageTechnical Section
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ContentContentPageBearing Data Tole
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ContentContentPageExamples for non-
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ContentContentPageApproved heating
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ContentContentPageSpherical Roller
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Basic, Componentsof Rolling Element
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Types ofRolling Element BearingsOve
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Types ofRolling Element BearingsFou
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Types ofRolling Element BearingsSph
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Types ofRolling Element BearingsThr
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Types ofRolling Element BearingsCam
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DesignationSystemGeneralThe designa
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DesignationSystemExamples for beari
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DesignationSystemN Cylindrical Roll
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DesignationSystemIn many cases seve
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DesignationSystemFor special applic
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DesignationSystemSymbols of contact
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DesignationSystemOH31/500Adapter sl
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GeneralBearing DataGeneralAs well a
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GeneralBearing DataShields (-Z, -2Z
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GeneralBearing DataGrease FillingNK
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GeneralBearing DataFig. 4.8d, D bea
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GeneralBearing DataLimit Values for
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GeneralBearing DataLimit Values for
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Bearing DataTolerancesWidth and Hei
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Bearing DataTolerancesBearing heigh
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Selection ofBearing Type and Size25
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Selection ofBearing Type and SizeLo
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Selection ofBearing Type and SizeDy
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Page 291 and 292: Designof Bearing LocationMagnitude
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Page 295 and 296: Designof Bearing LocationShaft and
Page 297 and 298: Designof Bearing LocationRecommende
Page 299 and 300: Designof Bearing LocationRecommende
Page 301 and 302: Designof Bearing LocationTables of
Page 303 and 304: Designof Bearing LocationShaft Fits
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Page 307 and 308: Designof Bearing LocationHousing Fi
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Page 313 and 314: Designof Bearing LocationFig. 7.4a)
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Page 323 and 324: BearingClearanceFor specifi c appli
Page 325 and 326: BearingClearanceSmoothing of Matchi
Page 327 and 328: BearingClearanceClearance of Bearin
Page 329 and 330: BearingClearancePreloading of Beari
Page 331 and 332: BearingClearanceRolling bearings re
Page 333 and 334: Lubricationof Rolling BearingsGener
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Page 337 and 338: Lubricationof Rolling BearingsLubri
Page 339 and 340: Lubricationof Rolling BearingsMisci
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Page 345 and 346: Handling, Mounting andDismounting R
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Handling, Mounting andDismounting R
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Einreihige RillenkugellagerSingle R
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Einreihige Rillenkugellager mit Rin
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Einreihige SchrägkugellagerSingle
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Einreihige Schrägkugellager in Uni
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Schrägkugellager, abgedichtetAngul
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Schrägkugellager, abgedichtetAngul
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Zweireihige SchrägkugellagerDouble
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VierpunktlagerFour-Point Contact Ba
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PendelkugellagerSelf Aligning Ball
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Pendelkugellager mit SpannhülsenSe
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Pendelkugellager mit verbreitertem
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ZylinderrollenlagerCylindrical Roll
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Einreihige ZylinderrollenlagerSingl
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Vollrollige ZylinderrollenlagerFull
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Vollrollige Zylinderrollenlager, ei
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Einreihige KegelrollenlagerSingle R
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Metrische einreihige Kegelrollenlag
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Gepaarte metrische einreihige Kegel
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IKOS Integral KegelrollenlagerTaper
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IKOS Integral-SprengringeSnap Rings
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PendelrollenlagerSpherical Roller B
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Axial-RillenkugellagerThrust Ball B
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Axial-ZylinderrollenlagerCylindrica
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LaufrollenCam RollersLaufrollenNorm
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GehäuselagereinheitenBearing Units
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Spann- und AbziehhülsenAdapter and
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NutmutternLock NutsNutmutternNormen
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NutmutternLock NutsJe nach Größe
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SicherungsblecheLocking WashersHaup
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ProduktverzeichnisNKE Produkte in n
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ProduktverzeichnisNKE Produkte in a
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ProduktverzeichnisNKE Produkte in a
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Product IndexNKE Products in Numeri
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Product IndexNKE Products in Numeri
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Product IndexNKE Products in Alphab
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Product IndexNKE Products in Alphab
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NKE AUSTRIA GmbHIm Stadtgut C4,A-44
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