SKF spherical roller bearings – setting a new …

1 SKF spherical roller bearings setting a new standard forperformance and reliabilityMade by SKF stands for excellence. It symbolises our consistent endeavour to achieve total quality ineverything we do. For those who use our products. Made by SKF implies three main thanks to modern, efficient products, based on our worldwide application know-how, optim-ised materials, forward-looking designs and the most advanced production effectiveness resulting from the favourable ratio between our product quality plus service facilities,and the purchase price of the lead which you can achieve by takingadvantage of our products and services. Increasedoperating time and reduced down-time, as well asimproved output and product quality are the key to a successful 3 Economical and robust .. 3 Why spherical roller bearings ? .. 3 Why SKF spherical roller bearings ? .. 4A complete bearing range .. 6 SKF spherical roller bearings leading in design.

2 8 Standard bearings : a unique combination of design features .. 8 setting new standards : the SKF Explorer .. 9 Sealed SKF spherical roller bearings for demanding environments .. 10 SKF Explorer the new performance class for spherical roller bearings ..12 Efficient in all industrial segments ..14 Where maintenance can be a nightmare .. 14 Downsizing more than just size .. 15 Trouble-Free Operation the SKF concept for cost saving .. of bearing size ..18 bearing life .. 18 Standard and Explorer a comparison .. 19 Minimum load .. 20 Required static load 20 Application of bearing arrangements .. 21 The new self-aligning bearing system .. 22 Radial location of bearings .. 22 Axial location of 23 Design of associated components .. 23 Mounting and dismounting ..24 bearing storage .. 27 Lubrication and 28 Grease lubrication .. 28 Maintenance .. 313 Product data ..32 bearing data designations .. 35 bearing spherical roller bearings .

3 36 Sealed spherical roller 54 Related SKF SKF Group a worldwide organisation ..631 Product information2 Recommendations3 Product dataCustomer benefitsPage .. 18 Page .. 321 Why spherical rollerbearings? spherical roller bearings offer an at-tractive combination of design features,which are making them irreplaceablein many demanding applications. Self-aligningSpherical roller bearings allow misalignment between shaft andhousing without increase of frictionand without reduction of bearing life. Very high load carrying capacityOptimum layout inside availablecross-section provides maximumradial and axial load carrying capacity. RobustInsensitive to misalignment causedby shaft or housing deflection due toheavy load. Easily fitted for loads in all directionsThe bearings are non-separable andready to install using a number ofmounting methods. Easy bearing applicationThe favourable design character-istics and mounting enable for amore efficient and compact and robust3 spherical roller bearings with integ-ral seals offer additional benefits.

4 Protection against contaminationSealed spherical roller bearings areespecially suited for bearing posi-tions where, because of limitedspace or for cost reasons, effectiveexternal seals cannot be provided. Grease retentionContact seals on both sides of thebearing retain the factory filledgrease where it is required: insidethe bearing . Minimum maintenance requirementsUnder normal operating conditions,sealed spherical roller bearings aremaintenance free, keeping servicecosts and grease consumption information2 Recommendations3 Product dataCustomer benefitsPage .. 18 Page .. 3240,5 180 CThe use of SKF spherical rollerbearings implies several efficienciesSKF spherical roller bearings have avery high load carrying capacity in theradial and axial directions. Bearingapplications become increasingly costeffective due to long service life and compact operating costs The optimised and robust internaldesign of the SKF spherical rollerbearings minimises friction and heat,and by this, lubricant consumption.

5 In service, this reduces costs due to less machine downtime, minimised maintenance requirements and high SKF spherical roller bearings ?SKF bearings are developed for cus-tomer satisfaction. The best confirma-tion of the total quality of SKF spher-ical roller bearings is their success onthe market. There are twice as manySKF spherical roller bearings in ser-vice as those of any other is not just by chance: SKFspherical roller bearings are well-proven in the field and undergo con-tinuous development to provideimproved performance . The mostrecent example has been the introduc-tion of the Explorer bearings , whichopened up new applicationhorizons,and the sealed bearings in standardand Explorer to align-ment errors Resistant to elev-ated temperatures Seals integrationUnder normal operating conditions,sealed SKF spherical roller bearingsare greased for life and make externalseals unnecessary, creating additionalbenefits: simplified bearing arrangements; no solutionMany bearing applications previouslyfitted with expensive special bearingscan now be equipped with SKF spher-ical roller bearings .

6 Because of theglobal availability of SKF sphericalroller bearings , spare parts are mucheasier to information2 Recommendations3 Product dataCustomer benefitsPage .. 18 Page .. 3251 Customer satisfactionEquipment owners will be impressedby the low operating costs in combina-tionwith high reliability contributed bySKF spherical roller bearings . Not onlyare costs reduced, but with sealedversions environmental resources bearings : always the best choice, when robust-ness and reliability matter 1 Product information2 Recommendations3 Product dataProduct rangePage .. 18 Page .. 32238248239249230240231241222232213223A complete bearingrangeThe range of open and sealed SKFspherical roller bearings covers allseries currently in demand. Takingavailability into account, this consti-tutes the most complete range on low-section bearings havebetter speed, space and weight char-acteristics. Wide high-section bearingshave higher load carrying series1 Product information2 Recommendations3 Product dataProduct rangePage.

7 18 Page .. 327 SKF spherical roller bearings without sealsThe open bearings are available insizes from 20 to 1 800 mm bore dia-meter and with cylindrical or taperedbore to suit all types of mounting methods. To facilitate efficient lubrica-tion, most bearings are provided withan annular groove and three lubrication holes in the outer bearings are available in a widerange of series designed to satisfy thefollowing selection criteria: load carrying capacity; combination of radial and axial loads; rotational speed; space in the SKF spherical roller bearingsThe SKF range of sealed sphericalroller bearings comprises bearingswith cylindrical bore for shaft diametersof 35 to 220 mm and bearings withtapered bore for shaft diameters of 40to 90 mm in the seven most frequentlyused bearing series. Further sizes canbe produced to special seals have been speciallydeveloped for spherical roller bearingsand effectively prevent contaminationfrom entering the rolling contact is not only true in operation, butalso during bearing installation, result-ing in long service information2 Recommendations3 Product dataLeading in designPage.

8 18 Page .. 32 Standard bearings : a unique combination of design features All SKF spherical roller bearings havefeatures in common which are uniquein the market: symmetrical rollers special roller profile self-guiding rollers an SKF patent floating guide ring between the tworows of rollers bearing components dimensionallystabilised for high temperatures metallic cagesTo facilitate efficient bearing lubricationSKF standard spherical roller bearingsare provided with three lubrication holesin the outer ring, mostly in combinationwith an annular groove. Depending onsize and series, standard SKF spher-ical roller bearings are basically madein three different designs: E design CC design CA design 8 SKF spherical roller bearings leading in designE designThe bearings of thisdesign have sym-metrical rollers, twohardened window-type steel cagescentred on the innerring, a flangelessinner ring and a floating guide ringbetween the tworoller designWith symmetricalrollers, two win-dow-type steelcages which are inner ring centredvia a floating guidering between thetwo roller designWith symmetricalrollers.

9 The innerring centred guidering centres the onepiece, doublepronged machinedcage of brass orsteel. The inner ringhas cagedesignSteel and brasscages are strong aswell as tolerant tohigh temperaturesand all and mediumsize bearings havewindow-type steelcages, larger sizeshave machineddouble prongedbrass or designCC design1 Product information2 Recommendations3 Product dataLeading in designPage .. 18 Page .. 3219 setting new standards : the SKF Explorer The unique SKF spherical roller bear-ing designs were the starting points forfurther development of materials andmanufacturing processes. The Explorerspherical roller bearings are the resultof very skilled and intensive fine tuningprocesses, which, taken all togetherconstitute a new performance level forspherical roller bearings . SteelNew, ultra-clean for longer life athigher loads. Heat treatmentNew procedures significantly improvewear resistance. ManufacturingRefined processes allow the produc-tion of smoother running bearingswith improved lubrication.

10 Internal geometryA fine-tuned micro-geometry of therolling contacts gives better bearings give more perform-ance for the same size as explained inmore detail from page high loadcarrying capacityThe symmetricalrollers self-adjust,providing an evenload distributionalong the rollerlength. This givesvery high load carrying capacityunder all load edge stressesThe special rollerprofile minimisesthe risk of frictionand minimum heatgenerationSelf-guiding rollers an SKF patent mean reduced fric-tion and minimumheat perform-ance at high tem-peraturesHigh-strength,dimensionally stablebearing rings mini-mise the risk of ringbreakage and alsoallow good perform-ance at high design1 Product information2 Recommendations3 Product dataSealed bearingsPage .. 18 Page .. 3210 Sealed SKF sphericalroller bearings fordemanding environ-mentsSealed SKF spherical roller bearingsare designed to fulfil high demands onsealing efficiency and operational reli-ability under difficult environmental seals were developedusing computer simulation, making fullusage of the vast expertise within theSKF Group.