General Catalogue

1 General Catalogue SKF, CARB, INSOCOAT, NoWear andSensorMount are registered trademarks ofthe SKF Group. Copyright SKF 2003 The contents of this Catalogue are the copy-right of the publisher and may not be repro-duced (even extracts) unless permission isgranted. Every care has been taken to en-sure the accuracy of the information con-tained in this Catalogue but no liability canbe accepted for any loss or damage whetherdirect, indirect or consequential arising outof the use of the information contained E June 2003 Printed in Germany on environmentallyfriendly, chlorine-free paper (Novatech) groove ball bearingsAngular contact ball bearingsSelf-aligning ball bearingsCylindrical roller bearingsTaper roller bearingsSpherical roller bearingsCARB toroidal roller bearingsThrust ball bearingsCylindrical roller thrust bearingsSpherical roller thrust bearingsEngineering productsMechatronicsBearing accessories bearing housingsMaintenance and lubrication productsOther SKF products General Catalogue2 The SKF brand now stands for morethan ever before, and means more toyou as a valued SKF maintains its leadership as the hallmark of quality bearingsthroughout the world, new dimensionsin technical advances, product supportand services have evolved SKF into atruly solutions-oriented supplier, creat-ing greater value for solutions encompass ways to bring greater productivity to cus-tomers, not only with breakthrough application-specific products, but alsothrough leading-edge design simulationtools and consultancy services, plantasset efficiency maintenance programs.

2 And the industry s most advanced supply management techniques. The SKF brand still stands for the verybest in rolling bearings, but it now standsfor much The knowledge engineeringcompanyGeneral3 Foreword .. 5 SKF The knowledge engineering company .. 10 Contents .. 14 Quantity UnitConversionLengthinch1 mm 0,039 inch1 in25,40 mmfoot1 m 3,281 ft1 ft0,3048 myard1 m 1,094 yd1 yd0,9144 mmile1 km 0,6214 mile1 mile1,609 kmAreasquare inch1 mm20,00155 1 ,16 mm2square foot1 m210,76 ,0929 m2 Volumecubic inch1 cm30,061 1 16,387 cm3cubic foot1 m335 0,02832 m3imperial gallon 1 l0,22 gallon1 gallon 4,5461 gallon1 l0,2642 3,7854 lgallongallonVelocity,foot per second 1 m/s 3,28 ft/s1 ft/s0,30480 m/sspeedmile per hour 1 km/h 0,6214 mile/h 1 mile/h 1,609 km/h(mph)(mph)Massounce1 g0,03527 oz1 oz28,350 gpound1 kg 2,205 lb1 lb0,45359 kgshort ton1 tonne 1,1023 short ton 1 short ton 0,90719 tonnelong ton1 tonne 0,9842 long ton 1 long ton 1,0161 tonneDensitypound per 1 g/cm30,0361 1 27,680 g/cm3cubic inchForcepound-force 1 N 0,225 lbf1 lbf4,4482 NPressure, pounds per 1 MPa 145 psi1 psi6,8948 103 Pastresssquare inchMomentinch pound-force 1 Nm 8,85 ,113 NmPowerfoot-pound per 1 W 0,7376 ft lbf/s 1 ft lbf/s 1,3558 Wsecondhorsepower 1 kW 1,36 HP1 HP0,736 kWTemperaturedegreeCelcius tC=0,555 (tF 32) Fahrenheit tF=1,8 tC+32 The previous edition of the SKF GeneralCatalogue was originally published in that time it has been translated into 16 languages and over 1 million copies havebeen distributed worldwide.

3 In the last edi-tion SKF introduced the New Life Theory ,which since has become a major new tech-nical standard for the bearing industry. Withthis broad usage and professional accep-tance, the SKF General Catalogue is General -ly considered to be the authoritative refer-ence source of its type throughout General Catalogue was subsequentlyconverted to electronic formats for addedaccessibility and convenience available ina CD-ROM version, titled SKF InteractiveEngineering Catalogue , and online new edition of the General Catalogueisalso available electronically as well as inprintand includes many revisions, additionsand enhancements to make the catalogueeven more useful and valuable. A familiariza-tion with the information in this foreword, aswell as other annotated sections, enablesthe user to obtain the maximum benefit fromthis comprehensive tool. This foreword discusses the main sectionsof the Catalogue with reference to majortechnical and product information as well asother available information of importance inunderstanding the overall capabilities of Catalogue overview This new SKF General Catalogue containsalmost all of the standard rolling bearings andaccessories required by industrial equipmentmanufacturers, as well as those used for re-placement purposes.

4 To provide the highestlevels of service, SKF endeavours to have itsstandard assortment match virtually all cus-tomer needs and to have products availableon a worldwide basis. The data in this Catalogue relate to SKF sstate-of-the-art technology and productioncapabilities as of early 2003. The data maydiffer from that shown in earlier catalogues because of redesign, technological devel-opments, or revised methods of reserves the right to make continuingimprovements to SKF products with respectto materials, design and manufacturingmethods, as well as changes necessitatedby technological units used in this Catalogue are in ac-cordance with ISO (International Organizationfor Standardization) standard 1000:1992,and SI (Syst me International d Unit s). Technical section principles of bearingselection and applicationThe technical section has a simplified indexallowing for easy identification of the separatechapters, which cover the basics of bearingtechnology as required for the design of abearing arrangement.

5 These chapters arearranged in the order normally followed by a design innovations in the technicalsection a new model for the determination of friction in rolling bearings. revised speed ratings for the thermallypermissible reference speeds based onthe new friction model. a new model for the determination of therequisite lubricant viscosity based onmore accurate knowledge of the influenceof raceway surface roughness and of theelastic deformation of the lubricant film. a new method to determine lubricant service life as well as the optimum relubri-cation intervals for grease-lubricatedbearings. the progress made in rolling bearing tech-nology and the experience accumulatedin practical applications in recent yearshave been taken into consideration andare referenced where appropriate in thevarious sections of the technical part. SKF technical services related to thebearing, the machine, or even the com-plete manufacturing plant from bearingselection and calculation, to installation,monitoring, maintenance and replace-ment, are covered in a section referred toas Asset Efficiency Optimization.

6 Product section bearing designations,descriptions and data The product section has a thumb index foreasy identification of bearing types. Theproduct tables contain all of the engineeringdata required for the selection of a bearingand its application. Information relating tothe specific types of bearings covered isarranged in front of the relevant producttable(s).Notable innovations in the product sectionSignificant products included for the firsttime are: CARB toroidal roller bearings stainless steel deep groove ball bearings hybrid deep groove ball bearings ICOS bearing /seal units sealed spherical roller bearings high-temperature ball bearings and Y- bearing units INSOCOAT bearings NoWear bearings Solid Oil bearingsInvestigations have shown that factors suchas mounting, lubrication and maintenancehave a much greater influence on bearinglife than previously assumed. For this reason,new information has been included on thefollowing: SKF products for maintenance andlubrication SKF condition monitoring equipment andsystemsSeveral SKF innovations are worthy of par-ticular note as they offer many advantagesfor enhanced performance or greater pro-ductivity.

7 For example, some of SKF product en-hancements make it possible to build smallermachines having the same or even betterperformance. Smaller size also implies lighterweight; meaning less friction, lower operat-ing temperatures, reduced lubricant require-ments and power consumption, and as a result, improved economy and added facilitate easy reference to the variousproduct innovations among the volume ofinformation contained in this Catalogue , thespecific products are identified as follows: SKF Explorer bearings the new perform-ance class from SKF, application optimized bearings standardbearings tailored for specialized require-ments, mechatronic components combinationsof bearings and electronic innovations represent the most im-portant new products in this Catalogue andwill be explained in more detail under theirappropriate headings in the product convenience, a summary description ofthese products is included Explorer bearings the new performance class from SKFSKF Explorer is a new performance class ofrolling bearings, of the types angular contactball bearings, cylindrical roller bearings,spherical roller bearings, CARB toroidalroller bearings and spherical roller thrustbearings, which provide a substantial im-provement in key operational parametersrelevant to the bearing type and its typicalapplications.

8 This new level of superior per-formance represents the blending of SKF sapplications knowledge with its expertize intribology, materials development, designoptimization and advanced analytical and modellingtechniques and supporting testing, SKF engineers were able to confirm that SKFE xplorer bearings provide a significant im-provement in key operational parameters, according to bearing typeand application, include noise, vibration,service life, dimensional stability, dynamicload carrying ability and heat generation(friction torque). Because these parametersare not adequately factored into standard-ized life calculations, SKF Explorer bearinglife is calculated with modified factors, whichtakes key operational parameters into Explorer bearings are interchange-able with previously specified SKF standardbearings of the same type and size. Thesebearings are included in the relevant producttables and are easily identified by an asterisk(*) in front of the bearing making of an SKF Explorer bearingAchieving the outstanding levels of SKFE xplorer bearings has only been possibledue to the basic sound engineering designof SKF products and by further improvingthe manufacturing of bearings to these designs.

9 By studying the interrelationshipbetween each bearing component, SKF engineers were able to maximize the effectsof lubrication and minimize the effects offriction, wear and contamination. To do this,an international research team looked ateach component at micro level and then developed new procedures to consistentlymanufacture this new standard of Explorer bearings are characterizedby a number of technical improvementssome of which are listed below. Dependingon the type of the SKF Explorer bearing oneor several of these below given exampleshave been applied: Improved bearing steelSKF Explorer bearings feature an ex-tremely clean and homogenous steel with a minimum number of improved steel is so much cleanerthan the highest grades covered by pre-sent classification methods that SKF hasdeveloped new calculation methods totake this factor into account. The unique SKF heat treatment proceduresTo maximize the benefits of SKF s ultra-clean steel, engineers incorporatedunique heat treatment procedures.

10 Thesenew procedures optimize the bearing sresistance to operational damage withoutaffecting heat stabilization. Wear resist-ance was improved so dramatically thatSKF engineers were not able to accuratelypredict life expectancy using existing lifefactors for calculation methods. Improved surface finishThe surface finish on all contact surfaces(rolling elements and raceways) has been improved to maximize the effects of the lubricant and reduce vibrations and has lead to a smoother, cooler run-ning bearing that uses less lubricant andconsequentlythe arrangement, includingthe seals, requires less groove ball bearings and taper rollerbearingsFor the rolling bearing types deep grooveball bearings and taper roller bearings therehave been many performance improvementssince the last SKF General Catalogue . In line with the SKF product strategy, improve-ments for deep groove ball bearings and taper roller bearings have now sufficientlybeen implemented for certain sizes to qualifyas SKF Explorer class bearings.