WIXLIB

LubricationGrease valvesOil lubricationFor operation at high speeds,e.g. in fan bearing arrangements,we can, by agreement, supplyFAG grease valves RSV, Figure 7.The grease valves for housingsSNV must be ordered separately.For bearings located by meansof adapter sleeves, grease valvesRSV5 or RSV6 should be used,for bearings with cylindrical bore,RSV2 or RSV3 should be used.FAG housings SNV are designedsuch that they are suitable forboth oil bath and recirculating oillubrication. The housings have alarge internal cavity with oil collectorpockets in the lower section aswell as connector facilities foroil inlet, oil outlet, oil levelsensors and temperature sensors.Mounting dimensions, Figure 8.When using oil bath lubrication,a minimum oil level (dimension h3in Figure 8) must be ensured.If the FAG double lip seal is used,a certain amount of oil leakage mustbe expected, which is unavoidablewith seals that are split and notspring-loaded. In order to limitoil leakage to a small quantity,the shaft in the double lip contactareas should be as follows:Hardness min. 55 HRC, ground freefrom spiral marks with R a 0,2 μmup to max. 0,5 μm.The parting line between the upperand lower sections of the housingmust be sealed with a thin layerof a commercial sealant(with permanent elasticity).In housings closed on one side,the base of the groove, into whichthe cover is inserted, must bebrushed with sealant.A technically oiltight version is onlypossible with a spring-loaded, unsplitrotary shaft seal. Please note thatthe housing must be ventilatedif oil bath lubrication is used(for example, the inlet hole can beclosed off using a ventilation plug).For design and availability,please contact our advisory service.7: FAG grease valves RSVGrease valveWidthbGrease otototo308313316322332810131516

LubricationHousing SNV for oil bath lubrication (suffix G944BA) included1 Oil level gauge OSGL.MOD24OMR-R./.,1 Ventilator VENT.MOD556E-R./., 2 Screw plugs VSB.DIN906-M10 1-ST.Version G944BA is available by agreement.n3Ventilatorn32ØD5M2h3M3g6M4g7Oil level gaugeαScrew plug8: Recommended dimensions of connector holes for oil inlet, oil outlet and oil level gaugewhen using oil bath lubrication. For recirculating oil lubrication, bore M 4 can be used for the oil outlet.HousingConnector for oil inletConnector for oil outletM2n 3/2mmM3α 35,528,5M10 1M10 1M10 1M10 G¼3840,542,545M10 1M10 1M10 1M10 0-FSNV340-FConnector for oil level �4345475028,540383930303030M10 1M10 1M10 1M10 5503636363658,5616065,5M10 1M10 1M10 1M10 536363636G¼G¼G¼G¼62,571,56876M10 1M10 1M10 1M10 55605836363636G¼G¼G¼737781M10 1M10 1M10 69

AssemblyMounting instructionsIf the bearings are located usingan adapter sleeve, the tight fitis achieved by axial pressing andradial expansion of the inner ring.The drive-up distance and reductionin radial internal clearance in thebearing (for recommended valuessee table, Figure 9) are a measureof this. FAG hydraulic nuts makeit easier to press the bearing ontothe shaft. The reduction in radialinternal clearance for sphericalroller bearings is determinedby measuring the residual airby means of feeler gauges.Self-aligning ball bearings aredriven up onto the sleeve,until a slight resistance can be feltupon deflection of the outer ring.However, the ring must be ableto rotate freely in a circumferentialdirection.Correct fitting has a decisiveinfluence on the achievablebearing life.For this reason, careful attentionmust be paid to the followingmounting instructions. For furtherinformation, see publicationWL 80 100, Mounting of rollingbearings.Bearings suitable for housings SNVcan be located on the shaft bymeans of adapter sleeves, or areseated directly on the shaft witha cylindrical bore. The necessarymachining tolerances for the shaftcan be found in Catalogue HR 1,Rolling Bearings.The upper and lower sections of thehousing are not interchangeable.Before fitting the plummer blockhousings SNV, carefully cleanthe mounting surface and checkits flatness.For flatness tolerances(DIN ISO 1101), see section“Load carrying capacity”, page 16.The clean lower section of thehousing is then located on themounting surface by means of thefixing screws. In order that thehousing can be aligned at a laterstage, the screws should not betightened using the full torque.The housing should be screwedinto place as required followingalignment.9: Reduction in radial internal clearance of FAG spherical roller bearings with tapered boreNominalbearing borediameterdRadial internal clearancebefore fittingInternal clearance groupCN ,110,131)Reduction inradial internalclearance 1)C4Control value for radialinternal clearanceafter fittingCNC3C4Displacementon taper 1:12 1)ShaftSleeveValid only for solid steel shafts and hollow shafts with a bore no larger than half the shaft diameter.Note: Bearings with a radial internal clearance value in the upper half of the tolerance range prior to fitting are mounted usingthe larger value for reduction in radial internal clearance or axial displacement, bearings in the lower half of the tolerance rangeare mounted using the smaller value for reduction in radial internal clearance or axial displacement.10

AssemblyMounting of bearings on the shaftBearings with cylindrical bore arepressed onto the shaft or preferablydriven up whilst warm. The bearinginner ring should rest correctlyagainst the shoulder on the shaft.If necessary, repress after coolingdown.When fitting bearings with taperedbore and adapter sleeves, it mustbe ensured that the bearing isin the centre of the housing beforelocating it. The shaft, completewith bearing, is inserted andaligned in the lower section of thehousing. The axial displacementof the bearing on the sleeve mustbe taken into consideration duringthis process.Mounting of split spherical rollerbearingsSplit FAG spherical roller bearingsshould be mounted by the samemethods. Special features for themounting of split bearings areindicated in the instructionsincluded with the delivery.11

AssemblyAssembly of SNV housings withdouble lip seals DH (Figure 10)1. Clean and check mountingsurface.2. Locate lower section of thehousing.3. Locate bearing on the shaft andfill up the free spaces in thebearing with some of the greasequantity, see Table 5.4. Fill the cavity between the seallips with grease. Insert one halfof the seal into each slot in thelower section of the housing.5. Insert shaft with bearing into thelower section of the housing.In the case of the locatingbearing, insert the two locatingrings. The non-locating bearingmust be in the centre of thehousing. In the case of housingsclosed on one side, insert onlyone seal and on the other sidethe cover DKV into the housingslot.6. Align lower section of the housingand tighten fixing screwsin the housing base with therecommended torque,see Table 13.7. Distribute the grease remainingafter lubrication of the bearing(point 3) evenly in the upper andlower sections of the housing.8. Insert the lubricated seal halvesinto the slots in the uppersection of the housing.9. Position the upper sectionof the housing and tightenthe connecting screws withthe recommended torque,see Table 13.10: Assembly of SNV housings with double lip seals DH12

AssemblyAssembly of SNV housingswith felt seals FSV (Figure 11)1. Clean and check mountingsurface.2. Locate lower section of thehousing.3. Insert round cord into slots inlower section of the housing.4. Introduce one half of adapterwith inserted, oil-impregnatedfelt strip to round cord in slotsin the lower section of thehousing.5. Locate bearing on the shaftand fill up the cavities in thebearing with some of thegrease quantity, see Table 5.6. Insert shaft with mountedbearing into lower section ofthe housing. In the case of thelocating bearing, insert the twolocating rings. The non-locatingbearing must be in the centreof the housing. In the caseof housings closed on one side,only one adapter with a feltstrip and, on the other side,the cover DKV is inserted intothe housing slot.7. Align lower section of housingand tighten fixing screws inhousing base with recommendedtorque, see Table 13.8. Distribute the grease remainingafter lubrication of the bearing(point 5) evenly in upper andlower sections of the housing.9. Insert round cord and adapterwith inserted and oil-impregnated felt strip into the slotsin the upper section of thehousing.10. Position upper section of thehousing and tighten connectingscrews with recommendedtorque, see Table 13.11: Assembly of SNV housings with felt seals FSV13

AssemblyAssembly of SNV housings withlabyrinth seals TSV (Figure 12)1. Clean and check mountingsurface.2. Locate lower section of thehousing.3. Push one labyrinth ring ontothe shaft. The slot in the ringbore must lie on the outside.4. Locate bearing on the shaft andfill up the cavities in thebearing with some of thegrease quantity, see Table 5.5. If necessary, push the secondlabyrinth ring onto the shaft(pay attention to position).In the case of housings closedon one side, insert the coverDKV into the housing slot.6. Fill up the labyrinth with grease.7. Insert shaft with mountedbearing and labyrinth ringsinto the lower section of thehousing. In the case of thelocating bearing, insert the twolocating rings. The non-locatingbearing must be in the centreof the housing.8. Align lower section of thehousing. Tighten fixing screwsin the housing base with therecommended torque,see Table 13.9. Round cord is pressed into theslot of the labyrinth ring borewhile rotating the shaft witha screwdriver. Then align thelabyrinth rings with the housingslots to provide even axial gaps.10. Distribute the grease remainingafter lubrication (point 4)evenly in the upper and lowersections of the housing.11. Position upper section of thehousing and tighten connectingscrews with recommendedtorque, see Table 13.1412: Assembly of SNV housings with labyrinth seals TSV

Additional holes for fixing screws and pinsAdditional holesfor fixing screws and pinss2SNVn2n1u2u1m1m2Additional holes for fixing screws and pinsHousingDesignationDimensions for pinsm1n1u1Dimensions for 24M24M30H/iH/iH/i1¼s2inchSNV housings are usually locatedusing two screws. The housing basehas two extended slots, so thatthe housings can be aligned duringassembly (dimensions m, u, vsee pages 20 ff.).For location on T profiles, fourscrews are required. Markingsindicate the locations (dimensionsm 2 and n 2 ) for boring additionalholes (diameter u 2 ) for the fixingscrews (s 2). Housings of the sizeSNV080 and above are availablewith these four additional holesfor fixing screws upon request.The ordering designation is asper the example:FAG plummer block housingSNV080-F-L-G944DA.Holes (diameter u 1 ) can bedrilled at marked locations(dimensions m 1 , n 1 ) for pinsto secure the position.15

Load carrying capacityLoad carrying capacityIn Table 13, page 17, the ruptureloads of the SNV housings madeof flake graphite cast iron (suffix L)are indicated as a function of theload direction.For spheroidal graphite cast iron(suffix D) a factor of 1,6 isapplicable.When determining the permissibleload, the usual safety factorsfor machine building must be takeninto consideration.The safety factors are:– 6 relative to the housing ruptureload– 3 relative to the maximum loadcarrying capacity of the connectingscrews and foot screws.The values are valid if the mountingsurface of the mating parts hasa flatness tolerance toDIN ISO 1101 of IT8(relative to distance a).A precondition for supporting loadsis that the housing base surface iscompletely and rigidly supported.For axial loading of the housings,C/d of the value for F 180 must beassumed. The permissible axialloading of the used bearings andthe axial retaining force of bearingson sleeves without the geometricallocking effect must be observed(see TI WL 80-14).16For load directions between 55 and 120 or in case of axial load,the housings are to be securedwith stops at the base in the lineof influence of the load, in casethe force parallel to the mountingsurface exceeds 0,05 · F 180 .The ring bolts in the upper sectionof the housing (from SNV215) mustnot be loaded to a value greaterthan the mass of the housingincluding the bearing.

Load carrying capacityF180 F150 F120 F90 A safety factor of 6 relative to the guide value for the housing rupture loadis recommended.F55 13: Load carrying capacityHousingHousing rupture loadConnecting screwsDesignationin the load directionThreadto DIN 13FAG55 kN90 120 150 180 Material 8.8Maximum load carryingcapacity of both screwswith contact betweenparting surfacesin load direction120 150 180 kNTighteningtorque **)Screwsfor housing base*)TighteningThread totorque **)DIN 13Material 8.8 Material 8.8 Material -F-L1 0001 0601 1801 1801 M307401 4501 4501 4501 450SNV290-F-LSNV300-F-LSNV320-F-LSNV340-F-L1 4001 5001 7001 9008509001 0001 03603603606402102102103701801801803207407407401 450M30M30M30M361 4501 4501 4502 600*)**)Screws for the housing base are not included in the FAG delivery.The tightening torques are maximum values with 90 % utilisation of the yield stress of the screw material and a friction factorof 0,14. We recommend tightening the screws to 70 % of these values.17

Ordering examplesOrdering examplesfor split FAG housings SNV,suitable FAG rollingbearings and accessoriesExample 1Plummer block housing(flake graphite cast iron),closed on one side,self-aligning ball bearing2210-K-TVH-C3 as locating bearing,location by means of adaptersleeve,double lip seal.Ordering:1 Plummer blockSNV090-F-Lhousing1 Self-aligning2210-K-TVH-C3ball bearing1 Adapter sleeveH3102 Locating ringsFRM90/91 CoverDKV0901 Double lip sealDH510Example 2Plummer block housing(flake graphite cast iron) forcontinuous shaft,split spherical roller bearing222SM70-TVPA as locating bearing,double lip seal.Ordering:1 Plummer blockSNV140-F-Lhousing1 Split spherical222SM70-TVPAroller bearing2 Locating ringsFRM140/12,52 Double lip seals DH516Example 4Plummer block housing(spheroidal graphite cast iron),closed on one side,spherical roller bearing23218-E1-TVPB as locating bearing,felt seal.Ordering:1 Plummer blockSNV160-F-Dhousing1 Spherical roller23218-E1-TVPBbearing1 Shaft nutKM181 Retaining plateMB181 CoverDKV1601 Felt sealFSV218Example 3Plummer block housing(flake graphite cast iron),closed on one side,spherical roller bearing 22216-E1-Kas locating bearing,location by means of adaptersleeve,labyrinth seal.Ordering:1 Plummer blockSNV140-F-Lhousing1 Spherical roller22216-E1-Kbearing1 Adapter sleeveH3161 Labyrinth ringTSV5161 CoverDKV140Designation example for housing SNV made from flake graphite cast iron:SNV100-F-LHousing material L Flake graphite cast ironD Spheroidal graphite cast ironThreaded holes for grease relubrication andgrease egressBearing outside diameter in mmDesignation of series SNV18

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FAG plummer block housings, splitn4n3M10x1For bearings with cylindrical bore andfor bearings with tapered bore and adapter sleevemvg1Mh1SNVn 1 n2D3 mm5216546Shaftd1dmminch19,05D/e197040B/c15Bearings suitable for the housingUnsplit bearingsmmDesignation to 207536,544,542,755410,5Split sphericalroller 30v62052205K22205K220522205* The ordering designation which corresponds to the designation according to DIN can be found in Catalogue HR 1, Rolling Bearings.20

Bearings withtapered bore andadapter sleeveD5TSVd2TCVFSVDHDHVDKVdd1DKVTBearings IN 931M1DIN 580M5Mass kg1818831)–7627953211525Required accessoriesAdapterShaft Retaining Locating ringsleeve2 piecesnutplateDouble lipsealV ring V505X0

Features Split FAG housings of series SNV, Figure 1, are designed according to a modular concept and are a development of the SN/SNE houngsi s. Rolling bearings of various diameter