RHP Self-Lube Bearings
RHP Self-Lube bearingsNSK-RHP is part of the international NSK groupwho are one of the world's leading manufacturersof rolling bearings, automotive components andmechatronic products.The group has more than 30 manufacturing unitsaround the world, employing over 21,000 peopleand is represented by sales offices and AuthorisedDistributors almost everywhere.Our manufacturing programme includes bearingsfrom 1mm bore to 5 metres, covering virtually allconceivable application areas. Self-Lube is anintegral part of our comprehensive product range.Every care has been taken to ensure that theinformation in this publication is accurate but noliability can be accepted for any errors oromissions. Copyright NSK-RHP 1997The contents of this publication are the copyrightof the publishers1
RHP Self-Lube bearingsIntroductionProduct SelectionSelf-Lube is the registered trademark for theRHP range of wide inner ring bearings andmounted bearing units.The purpose of this catalogue is to introduce theRHP Self-Lube range and provide the necessarytechnical information for assisting in selectingthe most appropriate Self-Lube product for mostapplications. NSK-RHP can provide many otheritems which are covered in further publicationsand can provide additional advice.Self-Lube units provide simple and effectivebearing arrangements capable of accommodating moderate initial misalignment from mountingerrors. They are easily mounted onto commercialshafting and are particularly useful wherefabricated machine frames are employed.The units are available in a variety of pillow blockand flange mounted configurations with onepiece cast iron or two piece pressed steelhousings.Self-Lube inserts are wide inner ring ballbearings that are effectively and efficientlysealed. Simple fitting onto standard shafting isprovided for by means of eccentric lockingcollar, set screws or adapter sleeve.Examples of calculation methods used whenmaking a selection are included within thiscatalogue together with advice and informationabout mounting.In line with our policy of continuous improvement, we reserve the right to amend the detailsin this catalogue without prior notice. If you haveany doubts when making an applicationselection, or if you require additional information,please contact NSK-RHP.The reliability, simplicity and ease of assembly ofitems in the Self-Lube range has resulted in theirpopularity for agricultural, extraction andconstruction machinery as well as process andautomation equipment.23
NSK-RHP UK Ltd.Mere Way, Ruddington, Nottingham,NG11 6JZ, England.Tel: 0115 936 6600 Fax: 0115 936 6702NSK-RHP Ibérica S.A.Calle De La Hidraulica,5, Poligono Industrial "La Ferreria",08110 Montcada I Reixac, Barcelona, Espana.Tel: (93) 575 4041 Fax: (93) 575 0520NSK-RHP Deutschland GmbHVerwaltung Ratingen, Harkortstrasse 15,40880 Ratingen, Deutschland.Tel: 0 21 02 4810 Fax: 0 21 02 48 12 29NSK-RHP Rulmanlari Orta Dogu TicaretLimited SirketiEski Üsküdar Cad., Çayir Yolu Sok.,Nora Center, Kat 1.81090 Içerenköy-Istanbul, TurkeyTel: 90 216 463 61 56 Fax: 90 216 463 61 473 Te Apunga Place, Mt. Wellington, Auckland,New Zealand.Tel: (09) 276 4992 Fax: (09) 276 4082NSK-RHP Australia Pty. Ltd.11 Dalmore Drive, Scoresby, Victoria 3179,Australia.Tel: (03) 9764 8302 Fax: (03) 9764 8304NSK-RHP Italia S.p.A.Via XX Settembre, 30, 20024 Garbagnate,Milanese (Milano), ItaliaTel: (02) 995 191 Fax: (02) 9902 5778NSK-RHP South Africa (Pty) Ltd.25 Galaxy Avenue, Linbro Business Park,Sandton, P.O.Box 1157, Kelvin, 2054,South AfricaTel: (011) 458 3600 Fax: (011) 458 3608NSK-RHP Nederland B.V.Bouwerij 81,1185 XW Amstelveen,Nederlands.Tel: (020) 647 0711 Fax: (020) 645 5689NSK-RHP American Distribution Centre Inc.5201 Blue Lagoon Drive, Suite 670, Miami,Florida 33126, USATel: 305-261 7824 Fax: 305-261 6246NSK-RHP France S.A.Quartier De L'Europe,2 Rue Georges Guynemer,78283 Guyancourt, Cedex, France.Tel: 01 30 57 39 39 Fax: 01 30 57 00 01NSK Singapore (Pte) Ltd.48 Toh Guan Road #02-03Singapore 608837Tel: 65 278 1711 Fax: 65 273 0253NSK-RHP Europe LtdWarsaw Liaison Office,Oddzial w Warszawie,UL. Migdalowa 4 Lok. 73,02-796 Warsaw, PolandTel: 48-22-645-1525 Fax: 48-22-645-15294IntroductionProduct SelectionSummary of Self-Lube typesThe Self-Lube product rangeThe Self-Lube ProtectorSealing, cages and lubricationShaft locking arrangementsSet screw thread and tightening torquesMounting instructions for Self-Lube Bearing unitsBearing load ratings and enduranceExamples of bearing calculationsLoading ratiosHousing loadsTolerances and speedsCast iron Self-Lube unitsPressed steel Self-Lube unitsSelf-Lube Bearing insertsSealed radial ball bearing with spherical outside diameterDisc harrow bearingsSelf-Lube Protector detailsAdditional productsConversion 3105108NSK Corporation3861 Research Park Drive, P.O. Box 1507Ann Arbor, M1 48108 USATel: 734-761-9500 Fax: 734 761 95105
RHP Self-Lube bearings67
The Self-lube product rangeThe Self-Lube product rangeUnder the heading of Self-Lube bearings there aretwo basic products: the Self-Lube bearing insert andthe Self-Lube bearing unit.Self-Lube bearing unitThe RHP range of Self-Lube bearing units offer awide choice of cast iron, pressed steel or syntheticrubber housings fitted with the full range of SelfLube bearing inserts, with spherical outsidediameter. They will accommodate initial housingmisalignment up to 0,030 radians but are notrecommended for running misalignment in excess of0,001 radians.The general housing types are pillow blocks,flange units, take-up units, cartridge units andhanger units. Choice is very much determined bythe requirements of the application, although theaesthetic appearance of the machine design is oftenan important consideration. Self-Lube units havebeen designed to meet the needs of both criteria.The castings are made from high-quality castiron, and finished on all unmachined surfaces withan electrostatic air drying paint.Pressed steel housings are made from mild steelstrip, and are zinc plated. Rubber housings aremoulded in antistatic nitrile rubber.Self-Lube bearing insertThe Self-Lube bearing insert, commonly known as awide inner ring bearing, is designed to suit the widerange of housings offered by RHP in theSelf-Lube bearing unit range and is also suitablefor applications where the user's own housing ispreferred.They are basically deep-groove ball bearings tothe internationally popular 6200 series configurationwith integral design features making them morefunctional and versatile than the standard ballbearing. The radial internal clearance is C3 forstandard bearing inserts and they are offered witheither parallel or spherical outside diameter outerrings with the latter being the type fitted in thebearing unit.The integral design features of the bearing insertsuch as shaft locking, seals and lubrication areexplained in the following pages.Variations of the basic series which have beendesigned for specific applications are also includedin this catalogue, e.g. Triple Lip Seal inserts, DiscHarrow bearings and the1726200-2RS series.Additional ProductsRHP does recognise the need for the 'tailormade' and is always willing to help customerswho have a requirement for something out of theordinary, commensurate with meeting certainprice and volume criteria. The glossary of some ofthe special inserts and units which RHP currentlymanufactures is shown on pages 103 to104.List of common Prefixes and SuffixesPrefixesBUnit or bearing insert supplied without locking collar.JGrease groove on the side of the bearing insert nearest to the locking device.TTriple lip sealed bearing insert.SuffixesAUnit fitted with set screw lock insert with flush inner ring on one side.C4Radial clearance greater than C3.CG Parallel outside diameter insert with grease groove and snap ring fitted.DEC Eccentric collar lock with extended inner ring.DLDouble locking inner ring - 4 set screws (2 each end).ECEccentric collar lock with flush inner ring on one side.FSBearing insert fitted with flinger seals.GBearing insert having relubrication facility.HBearing insert with hexagon bore.HLT High and Low temperature bearing insert.JBearing insert with pressed steel cage.KBearing insert with tapered bore.LLarger than normal unit for the basic bore size.RSmaller than normal unit for the basic bore size.89
The Self-lube product rangeSealing and cagesSelf-Lube ProtectorThe RHP Self-Lube Protector is designed to protectthe machine operator from the dangers of rotatingshaft ends and the external surfaces of the bearingfrom contamination.The Protector is made from good quality mild steeland coated with enamel paint making it robust,attractive and long lasting. It is easy to fit and can beremoved without breakage or deformation thusallowing it to be refitted time after time.Standard Self-Lube inserts with spherical outsidediameters have a 'groove' in the outer ring on theopposite side from the grease groove. The Protectorhas two claws which locate through the castingloading slots with the 'groove' in the outer ring. Thisprovides a very secure lock and makes the Protectordifficult to dislodge. The user of Self-Lube units is notrequired to purchase special bearings or provideany additional locking device.The Protector can be removed by inserting a formof lever device into the small hole in one of the clawsand exerting slight pressure outwards. Thisdisengages the claw from the outer ring 'groove'. Areplaceable cover for the hole is provided.Single lip sealThe standard Self-Lube sealing arrangementconsists of a nitrile and fabric sealing elementsandwiched between two metal pressings. This hasbeen successfully proven over the years on a widevariety of applications.The 'S' type seal now introduced incorporatesfurther design developments. The nitrile seal (blackin colour) is bonded to a strong steel former firmlysecured in the bearing outer ring. The flexiblesealing lip contacts the fine ground finish of theinner ring to give low friction with effective sealing.Triple lip sealFor applications with a high degree ofcontamination, the specially developed RHP triplelip seal is recommended. It consists of a one-piecemoulded nitrile seal with three sealing lips, bondedto a protective steel outer pressing which is stronglysecured in the outer ring making a highly efficientsealing arrangement. It is not recommended for highspeeds. See pages 88 to 90 inclusive.Triple lip sealSingle lip sealSingle lip seal - 'S' typeCagesPlastic cages. All standard Self-Lube bearing insertsare fitted with nylon 66 cages.Steel cages. Bearings specified to operate atextremes of temperature are fitted with steel cages.Flinger SealWhere extra protection is required without loss ofbearing catalogue speed, the 'Flinger seal' is ideal.It consists of a steel flange to which is bonded aflexible nitrile sealing lip.They are offered for the 1000 and 1000DEC typesand are identified with the suffix FS(e.g. 1025-25GFS,NP25FS).Please check availability.(Patented)Flinger seal1011
LubricationShaft locking arrangementsLubricationSelf-Lube bearings are factory charged with thecorrect amount of grease and do not require afurther grease charge when being fitted.Re-lubrication is not normally necessary exceptwhen operating at extremes of temperature, speed,loading, extended running, or where excessive wetor dirty conditions exist. The re-greasing cycle isdependent upon each application, and in suchcases please consult NSK-RHP, or refer to the RHPTechnical Handbook.All cast iron units are fitted with a standard regreaseable bearing insert. The housings areprovided with a tapped hole to facilitate relubricationand supplied with a plastic plug and grease nipple.All such units are tapped 1/4" UNF except for the FCseries which is tapped M5 x 0,8 pitch.Note: A grease adapter (ref. 1003G) is availableto fit the 1/4" UNF tapped hole to give 1/8" BSP femalefitting.To make the unit re-greaseable, insert greasenipple provided.The pressed steel housings are not provided witha re-greasing facility.Suitable greases for re-lubricating standardSelf-Lube bearings are premium quality lithiumbased of No. 21/2 or No.3 consistency. See erita HVAlbida R2Alvania R3Alvania RALZR2Energrease LS3-20 C to 110 C Beacon 3Multis Special 3Lupus A3Mobilux 3Set screw lockThis locking arrangement consists of two knurledcup-point, self-locking, socket-head set screws fittedin the extended inner ring .For normal loads and moderate speeds simplymount the bearing unit into position and tightendown the set screws to the recommended torquevalue.Additional security can be achieved by spotdrilling the shaft to accommodate the set screwpoint. When spot drilling, first remove the set screwand locate the unit in position on the shaft. Select adrill the size of the inner ring threads minor diameter,and drill through this hole into the shaft to the depthof the drill point.Replace the set screw and tighten onto the shaft inthe normal manner.The recommended tightening torques for the setscrews are given on page 14.set-screw lockSupplierShellShellShellShellSilkoleneBPEsso PetroleumTotalCentury OilsMobil OilLowdown to -40 CTemperatureKluber Asonic HQ72-102HighTemperature up to 180 CKluber Asonic HQ72-10212High and Low temperature inserts/unitsBearing inserts and units can be supplied foroperating up to a maximum temperature of 180 Cand down to a minimum temperature of -40 C.Re-greasing is essential for these bearings usingthe recommended grease shown in the table. Othergreases must not be used.These bearings are fitted with a steel cage andprovided with C5 radial internal clearance asstandard.When ordering please add the suffix HLT to theinsert or unit reference, e.g. NP25EC HLT.Eccentric collar lockEccentric collar lockTaper sleeve lockThis locking arrangement which incorporates astandard taper adapter sleeve, locknut and lockwasher, is recommended when a positive concentric(shaft) lock is required.When fitting the bearing to the shaft, care must betaken to ensure that the locknut is not overtightenedas this can eliminate the bearing internal clearance,resulting in premature failure. A lockwasher isprovided which prevents the locknut 'backing off'when one of the tabs is engaged with thecorresponding notch in the locknut. (See page 15for fitting instructions.)The recommended tightening torques for thelocknuts are given on page 14.Set screw lockTaper sleeve lockEccentric collar lockThis type of lock consists of an eccentric diameterformed on the extended inner ring of the bearingwhich engages a similarly formed eccentricdiameter in the bore of a separate collar.Locking is achieved by turning the collar in thedirection of shaft rotation until the eccentricdiameters of both collar and inner ring are fullyengaged. The collar is provided with a blind hole tofacilitate tightening when locking the bearing to theshaft. The set screw when tightened to therecommended torque values on page 14 preventsthe collar 'backing off' in service.Taper sleeve lock13
Set screw thread and tightening torquesMounting instructionsfor Self-Lube bearing unitsSet screw thread and sizeGeneral notes on mountingTo prevent the possibility of damage to thebearing due to faulty installation, Self-Lubehousings should always be bolted to theequipment and secured in position together withthe shaft assembly before locking the inner ringsonto the shaft. Failure to do so could result inaxial preload leading to premature failure.Clean, straight shafting should always be used,with a chamfered shaft end to provide a lead intothe bearing bore.It is important to ensure that the set screws areclear of the bearing bore before the unit isassembled onto the shaft.The Self-Lube bearings will normally slide overthe shaft but if a force fit is required a correctlysized brass tube should be used to press againstthe inner ring face. Never hammer the end of theinner ring or housing as this may damage thebearing.When a shaft mounting is complete, turn theshaft to make certain it rotates freely withoutbinding.When using the spot drill method for the setscrew seating, be careful not to damage thescrew threads of the inner ring with the drill.All cast iron bearing housings should bemounted, whenever possible, so that they are incompression under load, not tension, i.e. takeup units should be mounted with the adjusterpushing against the housing for take-upadjustment.Cast iron housings should not be used onapplications with heavy reversing or pulsatingaxial loads.Special consideration should be given toapplications with long bearing centre distances,or cases where the bearing could be subject toinduced loads caused by differential expansiondue to temperature change. In such cases pleaseconsult NSK-RHP.BasicbearinginsertreferenceSeries1000G, 1100, 1200G, 13001000 DECG, 1100DEC, 1200ECG, 1300ECInch bore diametersMetric bore diametersInch bore diametersMetric bore diameters1017102010251/4UNFM6 x 0,75M6 x 0,75M6 x 0,751/4UNF1/4UNF1/4UNFM6 x 0,75M6 x 0,75M6 x 0,7510301/4UNFM6 x 0,755/16 UNFM8 x 1,0010351040104510501/4UNFM6 x 0,75M8 x 1,00M8 x 1,00M8 x 1,003/8UNFM10 x 1,25M10 x 1,25M10 x 1,25M10 x 1,2510551060106510703/8UNFM10 x 1,25M10 x 1,25M10 x 1,25M10 x 1,253/8UNF107510807/16 UNFM12 x 1,25M12 x 1,257/16 UNF-M12 x 1,25-1085109030951/2UNFM12 x 1,25M12 x 1,25M12 x 1,25--1/4UNF5/16 UNF5/16 UNF5/16 UNF3/8UNF3/8UNF3/8UNF7/16 UNF1/2UNF1/2UNF1/4UNF3/8UNF3/8UNF3/8UNFM10 x 1,25M10 x 1,25M10 x 1,25M10 x 1,253/8UNF3/8UNF3/8UNFSet screw tightening torques and maximum axial loadsSet screw sizeSocket/Allen keysize (across flats)Recommended maximum tightening torqueSet screw maximum axial load1/4UNF1/8 "newton metres (Nm)lbf-inchesnewtons (N)lbf6,86025005/16 UNF5605/32 "12,411035007853/8UNF3/16 "22,6200450010107/16 UNF7/32 "31,6280750016851/2UNF1/4 "45,240090002025M6 x 0,753mm5,7502500560M8 x 1,004mm12,41103500785M10 x 1,255mm27,124050001235M12 x 1,256mm38,434080001800Additional notes on mounting Self-Lubeadapter sleeve units1 First bolt the Self-Lube housing to theequipment and clean the shaft and sleeve boreof any oil or grease.2 Position the shaft within the unit and tighten upthe locknut by hand. If the sleeve assemblyturns on the shaft tap the sleeve into thebearing to give a positive grip. Tighten locknutto recommended torque value given onpage 14.3 Where torque spanner facilities are not availablea blunt drift and small hammer may be used totighten the nut.4 Check that the bearing rotates freely, to ensurethat the internal clearance has not been totallyremoved and that preload has been avoided.5 Finally, secure the nut with the appropriate tabon the locking washer.6 After 100 hours running it is advisable to checkthe tightness of the locknut.Note For axial loads in excess of the values listed a shouldered shaft against the face of the inner ring isrecommended. Maximum axial loads with a shouldered shaft are shown on page 21.Recommended tightening torques for adapter sleeve unitsSleeve bore size20mm,25mm,30mm,35mm,40mm,45mm,50mm,143/4"15/16 ",1"13/16"11/4", 13/8"17/16", 11/2"111/16", 13/4"115/16" 2"11/8",Tightening 015
Mounting instructions for Self-Lube bearing unitsBearings load ratings and enduranceDynamic load ratingsThe RHP dynamic load ratings given in thiscatalogue and the relationship between theseand bearing fatigue life are based on theISO standard 281. (1990)Self-Lube cast iron pillow block units1Relieve set screws clear of thebore and slide bearing onto theshaft.2Bolt the unit down on to a flatsurface but do not over-tighten.3Tighten set screws torecommended torque.Self-Lube pressed steel flange units1Assemble bearing and housingand slide onto the shaft. Do notengage collar.2Lightly tighten bolts, repeat atother end of shaft and then finallytighten bolts on both sides.3Engage the eccentric collar indirection of shaft rotation.Basic dynamic radial load rating CrThis is defined as the load that can be applied tothe bearing to give a basic L10 rating life of onemillion revolutions. This is the life associated with90% reliability which has been found byexperience to be acceptable for normalengineering bearing applications. The majority ofthe bearings attain a much longer life and themedian life is approximately five times the L10 life.Ratings for each series are given in the bearingtables and are used to calculate life for radialloads of constant magnitude and direction.Equivalent dynamic radial load PrFor applications where axial and radial loads arepresent they must be converted into a singleequivalent radial load Pr and calculated asfollows, where:Fr actual radial load (N)Fa actual axial load (N)Y axial factor from table 18.2Cor basic static load ratingCr dynamic radial load ratingfo axial load factorNote: Axial load Fa must not exceed 0,5 Cor.Select fo from table 18.1 for the appropriatebearing insert . Calculate foFa and obtain the valueCorof Y from table 18.2Calculate Pr where:P r FrorPr 0,56 Fr YFaUse whichever Pr value is the greatest.416Tighten collar with drift pin.5Tighten collar set screw torecommended torque.Relationship between load and lifeHaving determined the equivalent load Pr thenominal L10 bearing life is calculated as follows:L10 life in hours Cr 3 x 106Pr60nwhere n bearing operating speed (rev/min).()Alternatively, by using the loading ratio Cr thePrbearing L10 life can be estimated by reading offdirectly from the tables on page 20 under theappropriate speed column.Basic static load rating CorThis value is calculated in accordance with ISOstandard 76 - 1987. Ratings for each series aregiven in the bearing tables.Static equivalent radial load PorWhen static axial and radial loads are applied to abearing these must be converted to an equivalentstatic radial load Por where:For actual static radial load (N)FOa actual static axial load (N)Calculate Por where:Por FororPor 0,6 For 0,5 FoaUse whichever Por value is greater, but thisvalue should not exceed the bearing staticradial load rating Cor .Service factorsIt is customary when calculating bearing life toinclude application factors to allow forfluctuations in loading that occur in service, andfrom experience the following may be used as aguide.For steady and light shock loads multiply loadby 1.2 to 1.5.For moderate shock loads multiply load by 1.7to 2.0.When selecting the size of bearing for a givenload, the calculated life should conform to the L10lives shown below:Machines in use 8 hours/day - not fully utilised 10,000 to 20,000 hours.Machines in use 8 hours/day - fully utilised 20,000 to 30,000 hours.Machines in use 24 hours/day - 40,000 to80,000 hours.Machines in seasonal use - 4,000 to 8,000hours.17
Bearing load ratings and enduranceExamples of bearing calculationsLimiting loadsThe axial load Foa must not exceed half the basicstatic load rating Cor. Housing strengths mustalso be considered as a limiting factor - seepage 21.Example 1What nominal life can be obtained from NP55with a steady radial load Fr 3900N at a speedof 1500 rev/min? The dynamic load rating Cr of theunit from page 25 is 43500N. Since the bearing isnot subject to axial load the equivalent loadPr Fr according to the formula on page 17.Therefore applying the service factor of 1·2 for asteady load (given on page 17)Pr Fr x 1·2 3900 x 1·2 4680N.Table 18.1Basic bearing 14,410751080108514,714,614,71090309514,513,6Table 18.2f0 F 451,313,455,176,891,151,041,00From page 17,L10 life in hours Cr 3 x106Prn x 60 43500 3 x10646801500 x 60 8923hoursAlternatively, using the loading ratio tables onpage 20 an approximate life can be obtained bylocating the nearest Cr value in the appropriatePrrev/min column.( )( )Therefore Cr 43500 9·29Pr4680Under the 1500 rev/min column the nearest CrPrvalue is 9·65 which gives an approximate life of10000 hours.Example 2With a radial load Fr 2940N and an axial loadFa 1470N at 300 rev/min with moderate shockpresent, what nominal L10 life can be obtainedfrom unit reference SF40?The dynamic radial load rating (Cr ) of the unitfrom page 39 is 29100N and the static load rating(Cor ) is 17900N.Since the bearing is subject to radial and axialloads we have to establish the equivalent load Praccording to page 17.First, we establish the value of fo Fa.CorUsing the greater value of Pr and applying anapplication factor of 1,7 (page 17) for moderateshock loads then:Pr 3881 x 1,7 6598NFrom page 17:Cr 3 106L10 life hours Pr x 60n29100 3106 6598x 60 x 300( )( ) 4766 hoursAlternatively, using the loading ratio tables onpage 20, an approximate life can be obtained bylocating the nearest Cr/Pr value in the appropriaterev/min column.Therefore, Cr/Pr 29100/6598 4·41.Under the 300 rev/min column page 20 the nearest value is 4·48 which gives an approximate lifeof 5000 hours.Housing strengthTo check the housing strength for the aboveexample when the axial load Fa 1470N andapplying an application factor of 1,7 then:axial load 1470 x 1,7 2499NFrom page 21 we see that the maximum axialloads for the above unit are:0,45 Cor in one direction, and0,25 Cor in the opposite direction.Calculating these two maximum axial loads thatmay be applied to housing:0,45 x 17900 8055N0,25 x 17900 4475NFrom the above it can be seen that the housingwill support the axial load of 2499N in eitherdirection.Therefore, the unit above is satisfactory for theloading conditions stated.Note It is advisable to shoulder the shaft for highaxial loads.fo Fa 14,0 x 1470 1,15Cor17900Using this value, from table 18.2 we establish avalue for Y 1,52 by interpolation. From page 17we then calculate the value of Pr .Pr 2940NorPr 0,56 (2940) 1,52 (1470) 3881N1819
Loading ratiosHousing loadsLife estimation for ball bearings for different Cr ratios and speedsPrMaximum recommended steady housingloadsThe maximum loads shown below are given as aproportion of the static load rating (Cor) of thebearing insert. Where the value of the axial loadexceeds the set screw axial holding load listedon page 14, a shoulder on the shaft must beprovided against the face of the inner ring.For shock load conditions additional safetyfactors must be applied.L10 life(hours)Speed: 655000750010000100Housing strength limitsRadial loadsAxial or0,45CorCorCorL10 life(hours)Speed: er to RHP for other types giving application details2021
Tolerances and speedsTolerances and speedsInner ring bore tolerances - Set screw and eccentric collar typesNominal bore diameter dmmabove101831,75050,80080Shaft tolerances and permissible 002·00003·14963·93700,001mm unitshighlow 15 18 21 24 280·0001 inch unitshighlow00000 6 7 8 9 1100000BasicbearinginsertShaft diameterHigh loads - high speedsNormal applicationsLight loads - low speedsmminchesMax.speedrev/minShaft toleranceISO h60·001mm0·0001inchunitsunitshigh lowhigh lowMax.speedrev/minShaft toleranceISO h70,001mm0·0001inchunitsunitshigh lowhigh lowrev/min10171020102512-1720251/2 -11 3030-3535-407/8 -11 /411/ 8-17/1613/ 540-4545-5050-5511/2-13/415/8-217/ 055-606560-7021/ 8-27/1621/227/ 16-2 5-7575-8080-85211/16-215/16 2300215/16-31/4215033/ 16-3 0–74–74–87000-29-29-341090309585-9095-10037/ 16-3 �3500–14–1420018000–87–8700-34-343/413 /16 -1Max.Shaft tolerancespeedISO h90,001mm0·0001inchunitsunitshigh lowhigh lowThe inner ring tolerances above do not apply to Disc Harrow type bearings shown on pages 94-101.Inner ring bore tolerances - series 1726200 - 2RS and 1726300 - 2RS.Nominal bore diameter dmmaboveincl.inchaboveincl.0,001mm unitshighlow0·0001 inch 871·18111·9685000000-8-10-12-3-4-5Outer ring outside diameter tolerancesNominal outside diameter DTolerancemmaboveincl.0,001mm ·0001 inch unitshighlow-11
two basic products: the Self-Lube bearing insert and the Self-Lube bearing unit. Self-Lube bearing insert The Self-Lube bearing insert, commonly known as a wide inner ring bearing, is designed to suit the wide range of housings offered by RHP in the Self-Lube bearing unit range and is also suitable for applications where the user's own housing is
In addition to assisting in bearing identification it helps to cross refer NSK and RHP types. This publication is intended for use within the NSK-RHP organisation and can be used in conjunction with the publication, NSK and RHP-Prefixes and Suffixes 1/NRPS/E/12.97. Designation Systems. Contents
5 - BEARINGS Ball Bearings, Plain pgs. 5-8 & 5-10 Precision Ball Bearings, Plain pg. 5-6 Precision Ball Bearings, Flanged pg. 5-7 Ball Bearings, Flanged pg. 5-9 Nonmetallic Ball Bearings pg. 5-11 Hydro-Dynamic Pressure Bearings 5-13 Linear Ball Bearings, Closed Type pgs. 5-14 & 5-15 Frelon Lined Linear Bearings, Self-Lubricating pg. 5-22
Note: Where O-ring lube is called for, use Parker O-ring lube or equivalent. Fill groove in bonnet (9) with O-ring lube. Lube bon-net O-ring (23) and slip into groove. Position new poly-urethane seat on bonnet. Fill groove on large diameter of stem (22) with O-ring lube. Lube second smallest O
Lube oil change Lube oil change The entire amount of lube oil must be replaced when performing a lube oil change. The re-maining lube oil volume in the engine and add-on parts should be kept as low as possible. The lube oil change is necessary when one of the following criteria is satisfied: upon approximation to the permissible limit value
(RCT bearings), ball screw support bearings, turntable bearings, as well as rectilinear motion bearings (linear ball bearings, linear roller bearings and linear flat roller bearings). A-5 Outerring Inner ring Cage Ball Deep groove ball bearing Fig 1.1 Ball Cage Outer ring Inner ring Angular contact ball bearing Fig. 1.2 Inner ring Outer ring .
Pump Bearings enable variability to save CO2. Bearing Solutions for Engine Needle Roller Bearings Thrust Needle Roller Bearings Planetary Gear Bearings One Way Clutches, e.g. for Oil-Pump Ball Bearings for Transmission Tandem Ball Bearings (TBB) Tapered Roller Bearings (TRB) Ball Bearing Cartridge for Turbocharger
Jiffy Lube Service Center #3867 5360 E. Carefree HWY. Cave Creek, AZ 85331 Chandler Jiffy Lube Service Center #2092 399 N Arizona Ave Chandler, AZ 85225-4582 Jiffy Lube Service Center #2649 1075 W Parklane Blvd Chandler, AZ 85224-5211 Jiffy Lube Service Center #3323 245 W Ocotillo Rd Chandler, AZ 85248 Jiffy Lube Service Center #3327
Advanced Engineering Mathematics 6. Laplace transforms 21 Ex.8. Advanced Engineering Mathematics 6. Laplace transforms 22 Shifted data problem an initial value problem with initial conditions refer to some later constant instead of t 0. For example, y” ay‘ by r(t), y(t1) k1, y‘(t1) k2. Ex.9. step 1.
