Bearing Installation - SKF

1 Bearing Installation and Maintenance GuideHighlights of the new edition of the SKF Bearing Installation and Maintenance Guide. The mounting and dismounting section has been expanded to include: -Individual step-by-step instructions for mounting self-aligning ball bearings, spherical roller bearings, and B This expansion ill allo the boo to be used as a guide during actual mounting of bearings rather than ust a reference - ssembly, mounting and dismounting instructions for split pillo bloc housings, unit ball housings, and unit roller housings The shaft and housing fit tables have been updated to include stainless steel bearings and reflect slightly different fit recommendations based on Bearing si e and style These changes are the result of s profound no ledge of our products and vast experience ith M and end user customers The lubrication section no includes the latest viscosity re uirement guidelines as ell as more specific guidelines for grease relubrication The troubleshooting section is no more user-friendly The Bearing failure section no reflects the ne I terminology and structure for Bearing failures It also features failure analysis service provided by 1 Table of contentsBearing types 3 Bearing terminology 9 Mounting and dismounting of bearings 11 General information Bearing care prior to mounting here to mount reparations for mounting and dismounting Bearing handling itting practice Internal

2 Bearing clearance Mounting Mounting bearings ith cylindrical straight bore old Mounting Temperature hot mounting eating the Bearing eating the housing Mounting bearings ith tapered bore Mounting tapered bore double ro self-aligning ball bearings ngular drive-up method Mounting tapered bore spherical roller bearings adial clearance reduction method on adapter sleeves adial clearance reduction method on solid tapered shaft ngular drive-up method on adapter sleeves hydraulic mounting method on adapter sleeves Mounting of B toroidal roller bearings adial clearance reduction method on adapter sleeves adial clearance reduction method on solid tapered shaft ngular drive-up method on adapter sleeves hydraulic mounting method on adapter sleeves ssembly instructions for pillo bloc housings, and haft tolerances eals Grease charge ap bolt tightening tor ues Misalignment limits Mounting instructions for collar mounted roller unit pillo bloc s and flanged housings Mounting and dismounting instructions for oncentra mount roller unit pillo bloc s and flanged housings Mounting and dismounting instructions for ball unit pillo bloc s and flanged housings Mounting and dismounting instructions for oncentra ball unit pillo bloc s and flanged housings Test running ismounting methods an the Bearing be used again 2 Shaft and housing fits 51 urpose of proper fits election of fit haft fit selection tables ousing fit selection tables haft tolerance limits for adapter mounting and pillo bloc seal seatings its for hollo shafts it tolerance tables - I tolerance grade limits haft tolerances for bearings mounted on metric sleeves Guidelines for surface roughness

3 Ccuracy of form and position haft and housing tolerance tables for inch si e taper roller bearings haft and housing tolerances for metric and -prefix inch series taper roller bearings haft and housing tolerances for recision B - deep groove ball bearings Lubrication 8 unctions of a lubricant election of oil iscosity uivalents hart Methods of oil lubrication Grease lubrication Grease relubrication elubrication intervals elubrication interval ad ustments Grease relubrication procedures solid oil lubrication systems G roubleshooting 1 3 ommon Bearing symptoms Trouble conditions and their solutions Bearing damages and their causes 11 amage mode classification efinitions oading patterns for bearings re-operational damage mode causes perational damage mode causes failure analysis service dditional resources 135 Maintenance and lubrication products Training olutions eliability and services The sset fficiency ptimi ation concept technology and service solutions Table of contents (cont.)

4 3 Bearing types1 ach type of Bearing has characteristic properties hich ma e it particularly suitable for certain applications The main factors to be considered hen selecting the correct type are: vailable space Magnitude and direction of load radial, axial, or combined peed Misalignment Mounting and dismounting procedures ee groo e ball bearingssingle ro , ith or ithout filling slots open basic design ith shields ith contact seals ith a snap ring groove, ith or ithout a snap ring ngular contact ball bearingssingle ro basic design for single mounting design for universal matching single ro high-precision basic design for single mounting design for universal matching matched Bearing setsdouble ro ith a one-piece inner ring open basic design ith shields ith contact seals ith a t o-piece inner ring our-point contact ball Bearing adial bearings recision re uired oise factor Internal clearance Materials and cage design Bearing arrangement eals 1 111 1 1 1 1 1 1 1 Self aligning ball bearings ith a cylindrical or tapered bore open basic design ith contact seals ith an extended inner ring B toroidal roller bearings ith a cylindrical or tapered bore open basic designs ith a cage-guided roller set ith a full complement roller set ith contact seals lindrical roller bearingssingle ro type type type type ith angle ring

5 Type double ro , cylindrical or tapered bore type type four-ro ith cylindrical or tapered boreFull co le ent c lindrical roller bearingssingle ro design double ro ith integral flanges on the inner ring ith integral flanges on the inner and outer rings ith contact seals adial bearings5 1 1 eedle roller bearingsdra n cup needle roller bearings open basic design ith contact sealsneedle roller bearings ith flanges ithout an inner ring ith an inner ring open basic design ith contact seals eedle roller and cage asse bliessingle ro double ro S herical roller bearings ith cylindrical or tapered bore open design ith contact seals Ta er roller bearingssingle ro double ro , matched sets T bac -to-bac T I face-to-face four ro T configuration T I configuration ross taper roller bearings le ing bearings ith or ithout gears adial bearings 1 Thrust ball bearingssingle direction ith flat housing asher ith sphered housing asher and seating asherdouble direction ith flat housing ashers ith sphered housing ashers and seating rings ithout seating rings ngular contact thrust ball bearingshigh-precision bearings single direction basic design for single mounting design for universal matching matched Bearing sets double direction standard design high speed design lindrical roller thrust bearingssingle direction single ro double ro components cylindrical roller and cage thrust assemblies shaft and housing ashers eedle roller thrust bearingssingle direction needle roller and cage thrust assemblies race ay ashers thrust ashersS herical roller thrust

6 Bearingssingle direction Ta er roller thrust bearingssingle direction ith or ithout a cover scre do n bearingsdouble direction Thrust bearings bearings (Insert bearings) ith an eccentric loc ing collar inner ring extended on one side inner ring extended on both sides ith setscre s inner ring extended on one side inner ring extended on both sides ith a tapered bore for adapter sleeve mounting ith a standard inner ring for locating by interference fit on the shaft a rollerssingle ro ball Bearing cam roller narro design ith cro ned runner surface double ro ball Bearing cam roller ide design ith cro ned runner surface ith cylindrical runner surfaceSu ort rollers ithout an axial guidance ith cro ned or cylindrical runner surface ith or ithout contact seals ithout an inner ring ith an inner ring a followers ith an axial guidance by thrust plate ith cro ned or cylindrical runner surface ith or ithout contact seals ith a concentric seating ith an eccentric seating collar ith a cage-guided needle roller set ith a full complement needle roller set bearings Trac

7 Runner bearings89 Bearing terminology8iEUI#PSF0uUTiEF %iBNFUFS The illustrations belo identify the Bearing parts of eight basic Bearing types The terms used conform ith the terminology section of the merican Bearing Manufacturers ssociation, Inc BM standards, and are generally accepted by anti-friction Bearing manufacturers Inner ring Inner ring corner Inner ring land uter ring land uter ring Ball ounter bore one front face flange up outer ring Tapered roller one bac face flange one bac face one inner ring ndercut age ace haft asher inner ring ousing asher outer ring eals Toroidal roller Thrust face uter ring race ay Inner ring race ay uter ring corner pherical roller ubrication feature holes and groove pherical outer ring race ay loating guide ring Inner ring side face uter ring side face ylindrical roller uter ring flange one front face Self aligning ball bearingSingle ro deep groo e ball Bearing ngular contact ball bearingSealed deep groo e ball bearingSpherical roller Bearing ylindrical roller Bearing apered roller Bearing B toroidal roller bearingSpherical roller thrust

8 Bearing bearing1 11 Mounting and dismounting of bearingsGeneral infor ationTo provide proper Bearing performance and prevent premature failure, s ill and cleanliness hen mounting ball and roller bearings are necessary s precision components, rolling bearings should be handled carefully hen mounting It is also important to choose the correct method of mounting and to use the correct tools for the ob ee the Bearing Maintenance Tools atalog - or mapro s f com Bearing care rior to ounting roper care begins in the stoc room tore bearings in their original unopened pac -ages, in a dry place The Bearing number is plainly sho n on the box or rapping Before pac aging, the manufacturer pro-tected the Bearing ith a rust preventive slush compound n unopened pac age means continued protection The bearings need to be left in their original pac ages until immediately before mounting so they ill not be exposed to any contaminants, especially dirt andle the Bearing ith clean, dry hands and ith clean rags ay the Bearing on clean paper and eep it cov-ered ever expose the Bearing on a dirty bench or floor ever use a Bearing as a gauge to chec either the housing bore or the shaft fit on t ash a ne Bearing it is already clean ormally, the preservative ith hich ne bearings are coated before leaving the fac-tory does not need to be removed it is only necessary to ipe off the outside cylindrical surface and bore If, ho ever, the Bearing is to be grease lubricated and used at very high or very lo temperatures, or if the grease is not compatible ith the preserva-tive.

9 It is necessary to ash and carefully dry the Bearing This is to avoid any detrimental effect on the lubricating properties of the grease ld grease can be ashed from a used Bearing ith a solvent but the fluid and container must be clean fter this cleaning, ash the Bearing out thoroughly ith light oil and then relubricate ee pages and Bearings should be ashed and dried before mounting if there is a ris that they have become contaminated because of improper handling damaged pac aging, etc hen ta en from its original pac ag-ing, any Bearing that is covered by a rela-tively thic , greasy layer of preservative should also be ashed and dried This might be the case for some large bearings ith an outside diameter larger than mm uit-able agents for ashing rolling bearings include hite spirit and paraffin Bearings that are supplied ready greased and hich have integral seals or shields on both sides should not be ashed before mounting here to ountBearings should be installed in a dry, dust-free room a ay from metal or ing or other machines producing s arf and dust hen bearings have to be mounted in an unpro-tected area, hich is often the case ith large bearings, steps need to be ta en to protect the Bearing and mounting position from contamination by dust, dirt and mois-ture until Installation has been completed This can be done by covering or rapping bearings, machine components etc ith axed paper or foil re arations for ounting and dis ountingBefore mounting, all the necessary parts.

10 Tools, e uipment and data need to be at hand It is also recommended that any dra ings or instructions be studied to determine the correct order in hich to assemble the various components ous-ings, shafts, seals and other components of the Bearing arrangement need to be chec ed to ma e sure that they are clean, particularly any threaded holes, leads or grooves here remnants of previous machining operations might have collected The unmachined surfaces of cast housings need to be free of core sand and any burrs need to be removed upport the shaft firmly in a clean place if in a vise, protect it from vise a s rotec-tors can be soft metal, ood, cardboard or paper The dimensional and form accuracy of all components of the Bearing