Super Precision Bearings - Lager-Techniek
euek.ni-techgerIndustriestrasse 1–3Georg-Schäfer-Strasse 3091074 Herzogenaurach (Germany)97421 Schweinfurt (Germany)Internet www.ina.comInternet schaeffler.comIn Germany:In Germany:Phone0180 5003872Phone0180 5003872Fax0180 5003873Fax0180 5003873From Other Countries:From Other Countries:Phone 49 9132 82-0Phone 49 9721 91-0Fax 49 9132 82-4950Fax 49 9721 91-3435w.laSchaeffler KGwwSchaeffler KGSuper Precision BearingsFAG: AC 41 130/7 EAINA: 034146334-0000 GB-D98/04/08 Printed in Germany by WeppertSuper Precision Bearings
www.lager-techneuiek.Super Precision BearingsAC 41 130/7 EA · April 2008 Issue
euk.ieechnr-tge.lawwEvery care has been taken to ensure thecorrectness of the information containedwin this publication but no liability can beaccepted for any errors or omissions.We reserve the right to make technicalchanges. Schaeffler KG · 2008, AprilThis publication or parts thereof may notbe reproduced without our permission.AC 41 130/7 EA
euk.The experience gathered by the Schaeffler Group formore than a century in application engineering,consulting and production engineering forms one of thelargest product portfolios worldwide. This knowledge isalways part of the solution we provide our customers.Conversely, the Schaeffler Group also benefits from itsclose involvement in applied solutions and from closecontact with its partners. Schaeffler Sector ManagementProduction Machinery terms as “added competence”this approach based on cooperation in a partnership,with the aim of achieving consistently “Faster, MorePrecise, Longer-Lived and More Economical” service insubsystems and overall systems.echnWith trend-setting bearing arrangement solutions forin-feed spindles, main spindles, rotary tables andlinear guidance units, the Schaeffler Group and itsbrands INA and FAG have been at the forefront of theworld market for decades.ieadded competence for your successwww.lager-tFAG Super Precision Bearings for main spindles representboth the highest precision and absolute operationalreliability. Innovative FAG spindle bearing solutionscontinually raise the standards for speed, precisionand service life. However, the bearing componentsalone no longer guarantee the success of the mainspindle system and the overall machine. Significantperformance increases and unique selling points forcustomers are now achieved when the bearing manu facturer consults and develops based on extensivesystem knowledge, and provides system services.The potential that leads to market leadership lies inclose partnerships with the manufacturers of spindlesand machine tools and in the shared experience andknowledge of the needs of the end users and theircustomers.The integration of important functions such as sealing,lubrication, location, damping and anti-corrosionprotection and more results in fewer interfaces andlower maintenance requirements, increased operationalreliability and time advantages in the market place, inaddition to cost savings. Basic research, calculationprograms, installation assistance, fitting aids andtraining courses available through a closely knit networkof sales and production sites also increase the valuebenefit for the customer.The prompt, reliable presence of Schaeffler employeesguarantees that our most valuable asset, namely ourpersonal connection, is available to you, our partners.
euContentsAdded competence for the main spindle –optimum benefit for the customer!Page 6Page 10k.FAG Spindle BearingsPage 88FAG Super Precision Cylindrical Roller BearingsechnFAG Double Direction Angular Contact Thrust Ball BearingsieFAG Floating Displacement BearingsPage 94199203Mounting guidelinesHandling of Super Precision BearingsChecklist for spindle mountingTemplate for spindle checklistClearance Adjustment in Cylindrical Roller BearingsF’IS Mounting ustomised SolutionsPage 218AppendixB EARINX Request to calculate bearingChecklist for spindle mountingTemplate for spindle checklistOverview card of grease quantities and distribution actionFurther ePagePagePagePagegeEngineeringLubricationService Life of Super Precision BearingsSpeed dependent fitsSpeedsDeflection and RigidityBearing Monitoringr-tTolerancesTolerances for Super Precision BearingsCorner dimensionsMachining Tolerances for Mating PartsPage 96www.laBearing arrangement design and application examplesBearing arrangement designApplication examplesRequest to calculate bearing arrangement226226227228229230231233238240
Added competence for the main spindle –Optimum benefit for the customer!Page 6FAG Spindle BearingsB719.C, B70.C, B72.C, HS70.C, HS719.C, B718.CB719.E, B70.E, B72.E, HS70.E, HS719.E, B718.EPage 10FAG Floating Displacement BearingsFD10Page 88Page 92k.euPage 20echnieFAG Super Precision Cylindrical Roller BearingsN10, N19, HCN10NN30, NNU49Page 96Page 102Page 116Page 124Page 130TolerancesPage 138EngineeringPage 176Bearing arrangement design and application examplesPage 194Mounting guidelinesPage 204Customised SolutionsPage 218AppendixPage 226www.lager-tFAG Double Direction Angular Contact Thrust Ball Bearings2344, 2347
euAdded competence for the main spindle –Optimum benefit for the customer!r-techniek.“Optimum benefit for the customer”is the aim of the Sector ManagementProduction Machinery within theSchaeffler Group Industrial. Formain spindle bearings, this demandapplies to far more than simplymanufacturing a good product,as it also takes into account theapplication, the end user and hisrequirements. This leads to thefollowing requirement for alldivisions that deal with the manufacturing of FAG Super PrecisionBearings: Top quality and technologyleadership Closest proximity to the customer Highest cost-effectiveness forthe specific application.www.lageHighest precision and cleanliness in production . in bearing assembly6. in spindle mounting
euOn componentsand expertiseThe beginning and end of all ourcompany activities are the same:proximity and benefit for thecustomer. Exact knowledge of thespecific application requirementsand processes is decisive inselecting the technologicallyoptimum product that also correlatesto the lowest system costs. Thiscan derive from the sophisticatedFAG range of Spindle Bearings,which possesses depth and breadthunmatched worldwide. The solutioncan also be custom-made andapplication-specific, providedboth promptly and reliably by theSchaeffler Group.FAG Super Precision Bearings setstandards wherever there areextreme demands in terms ofreliability, high running accuracyand high speeds – whetherincorporated in machine tools, inthe textile industry, woodworkingmachines or elsewhere. Thecomprehensive product rangepermits optimum bearing arrangements for all types of locations andapplications.Schaeffler Group’s research facilitiesand close contact with the customerprovide the fundamentals forcontinuously developing existingproducts and expanding the productrange.FAG Super Precision Bearingsalways combine the technicalsolution of a bearing applicationwith the economic solution. Thisbecomes apparent when the bearingsystem is analyzed holistically interms of calculations, simulationand design, as well as distribution,mounting and service. The analysisbegins with the principal demandsmade of the bearings, but alsoincludes examination of options forapplication-appropriate integrationof important functions such assealing, lubrication, location,monitoring, etc.The interactions of bearing arrangement adjustments on the system asa whole can already be tested atthis stage. Schaeffler GroupIndustrial provides proven calculation and simulation tools forindependent use or as a service,and offers comprehensive trainingand consultation events.www.lager-techniek.FAG solutionsand its customersMilling spindle in useThis catalog gives a detailedoverview of the FAG product rangeof high precision bearing arrangements as well as the most importantrules for bearing selection, bearingarrangement design and mounting.For more detailed information,please do not hesitate to contactour competent partners. in work result7
Catalog structuregeThe catalog is divided into six parts.Following the introduction, thechapter “Bearing tables” lists thecomplete product range of SuperPrecision Bearings. The importanttechnical characteristics andperformance features are describedin tabular form. This section isstructured based on the differentbearing types: Spindle, CylindricalRoller, Floating Displacement andDouble Direction AngularContact Thrust Ball Bearings.A short introduction tothe bearing forms,design types and adescription ofnomenclature isprovided at thebeginning ofthe bearingtables. The“Tolerances”chapter followsthe tablesection andcontains information aboutthe bearingsingsBearand their matingparts.lawwwsionSureciPrepIn the following “Engineering”chapter, the necessary steps andcalculation methods for selectingand designing a spindle bearingarrangement are presented. Thecalculation of service life, lubrication life, limited speed and rigidityare given particular attention.The necessary methodologicalsteps for concrete applicationengineering design of a spindleare presented in the “Bearingarrangement design” chapter.The mounting of spindle bearingsrequires special attention regardingprocedure, accessories andenvironmental conditions thatmust be maintained. These areaddressed in detail in the“Mounting guidelines” chapter.In addition to the “Standard range,”the Schaeffler Group offerscustomer-specific bearing solutionsin the high precision sector.Options are described in the“Customised Solutions” chapter.hniek.The catalog is provided in8 languages (German, English,French, Italian, Spanish, Czech,Chinese and Japanese) and isavailable in all languages on aCD-ROM of the same name. It isalso available on the Internet fordownload at www.fag.com andwww.schaeffler.com. The printedcatalog can be requested (in limitedquantities) for free through yournational company (see appendix,Page 233 ff.).r-tecThis catalog (FAG AC 41 130/7)presents the product range ofFAG Super Precision Bearings formain spindles. It is further designedas a technical compendium for theselection and design of bearingarrangements utilizing high precisionbearings. The principal engineeringrelated information for the designeris summarized and accessible. Theclear structure, numerous crossreferences and the subject index atthe end make it easier for studentsand “young colleagues” in trainingto enter the world of high precisionbearing arrangements. For theexperienced user of spindlebearings, it provides a readypresentation of all components,expertise and services offeredby the Schaeffler Group.euAbout this catalog
Product features of FAG Super Precision BearingsThe right materialww.laFAG Super Precision Bearings aremanufactured from high gradematerials. High material fatigue lifeand wear resistance have beenachieved using a specific heattreatment, so that the bearings canin many cases be operated withinfinite service life. The materialCronidur 30 is particularly important,as it makes a Spindle Bearing intoan X-life ultra Bearing. Its uniqueproperties as to fatigue strength andcorrosion resistance result insignificantly extended service life,higher admissible contact pressurefor infinite service life, higheradmissible speeds and significantlyenhanced lubricant service life. ForSpindle Bearings, Hybrid Bearings,i.e. bearings in combination withsteel rings and ceramic balls, arewhniek.geAt first glance, the accuracy ofbearings seems to be sufficientlydefined in DIN/ISO or ABECstandards. Yet FAG Super PrecisionBearings go beyond this. In additionto demanding tolerances to P4 orbetter, there are other performancefeatures that are not covered bythese norms. All important productfeatures of FAG Super PrecisionBearings meet Precision Class P2.This applies to the running accuracyas well as the parallelism ofFAG bearings that are manufacturedto FAG standard P4S. Maximumprecision bearing arrangementscan therefore be designed withstandard FAG Super PrecisionBearings. (see tolerances forSingle Row FAG Spindle Bearings,Pages 144 ff.)now standard. Ceramic rollers arealso used in Cylindrical RollerBearings. Silicon nitride is theceramic material that combinesthe typical ceramic properties inthe most favorable way. They offermany advantages over steel rollingelements, such as outstanding tribological behaviorin combination of steel andceramics. The stress on materialand lubricants is significantlyreduced in hybrid bearings. a lower density that reducescentrifugal forces on the rollingelements, improving the bearing’skinematics lower coefficient of thermalexpansion of the ceramic rollingelements. It has a positive effecton the change in bearing preloadin the event of temperaturedifferences during operation.These factors result in significantlyextended bearing life. For thisreason, hybrid bearings are nowfrequently used even at lowerspeeds.r-tecFAG accuracy to P4SeuFAG accuracy to P4S · The right material · LubricationFAG Super Precision Bearingsparts of the process. The result ofthis extensive process is anapproved product specification forthe lubricant in question, whoseprecise compliance is ensured bycontinuous inspection.LubricationThe grease used plays an importantrole in the overall bearing system.The decision as to grease or oillubrication has a significant effecton the system costs. The goal ofSchaeffler Group is to permit andadvance grease lubrication even atmaximum speeds. Before a lubricantis approved for bearings, it undergoes a strict approval process.The calculations and suitabilitytests for the application-specificrequirements, for example thetemperature behavior and run-inbehavior of a spindle running athigh speed, are very important9
euhniek.r-tecge.lawwwFAG Spindle Bearings
euFAG Universal BearingsFAG Universal Bearings are aspeciality. They are manufacturedin such a way that they can bemounted in any arrangementwithout suffering performancelosses, and can be combined indifferent sets. This brings essentiallogistical advantages, especially inspare parts purchasing and stockkeeping. The bearings can bearranged according to the symbolon the outer ring surface.r-techniek.For new machine tools it is possibleto deliver significant performanceincreases and cost saving potentials.These can be realised when expertisein bearing system arrangements andidentification of the most suitablebearing type are considered andoptimised; equally correct bearingmounting practices must beemployed.FAG Spindle Bearing solutions cangive new designs unique sellingpoints in the market, similarlyexisting designs can be upgradedand achieve enhanced performance.The tables here in this catalogshow the actual product range ofFAG Spindle Bearings. However,the listing is not final in terms ofdimensions and design types;Spindle Bearings can be offered inadditional sizes and variants uponrequest.www.lageFAG Spindle Bearings are single rowangular contact ball bearings ofthe highest precision. The outerenvelope dimensions are standardised, so they can be interchangedwith other market sector products.The FAG range of Super PrecisionBearings for main spindles inmachine tools is among the mostsophisticated in the world andrepresents the highest-performancetechnology. FAG Spindle Bearingsare available in almost all designsdeveloped for the main spindlemarket. The selection can thereforeaccommodate almost all applicationspecific demands. Their specialdesign features in terms of contactgeometry, material selection, surfacequality and lubricant guidancestand for: highest precision excellent speed-ability high rigidity and good vibration behavior.DU DBDU DFDU DT1: Installation possibilities of a DU set11
FAG Spindle BearingseuSealed Spindle Bearingsr-tecgeSpindle bearings are high precisionfunctional parts that react sensitively to damaging influencesfrom the environment such ascontamination and airflows. Propergreasing in terms of the amountand selection of lubricant is also acriterion that can directly affectmachine service life, as the greaseservice life is in effect equal tothe bearing service life. Early on,FAG set the standard for HighSpeed Spindle Bearings (HSS, HCSand XCS) with sealed bearings.Almost all spindle bearings are nowoffered with non-contact gap sealson both sides, as their specialsealing advantages have gainedacceptance on the market. SealedFAG Spindle Bearings are filledwith FAG ARCANOL L075 highperformance grease and combinemany advantages: robust, compact unit ready-to-fit, lubricated for-life,maintenance-free factory-filled with optimum greasein the appropriate quantity protected against contaminationand airflowThe wide range of applications forSealed Spindle Bearings also marksthe continuing trend from oillubrication to grease lubrication.High Speed versions of FAG SealedSpindle Bearings bear the abbreviation S (for Sealed) in theirclassification. Large-ball bearings,such as bearings of the B prefix,carry the designation 2RSD in theirname.hniek.Sealed Spindle Bearingswww.la2: Direct Lube Bearings3: Sealed Spindle Bearings12
FAG Spindle BearingsHybrid BearingsWhere grease lubrication meetsits limits, FAG Direct Lube (DLR)Bearings ideally complement theSpindle Bearing range. Direct LubeBearings ensure reliable lubricantfeed very close to the point ofrolling contact. This is achieved bya circumferential groove and radialsupply holes. Integral precisionO-rings seal the bearing against thespindle housing. FAG DLR Bearingsreach extremely high speeds. Theexceptional power density of thisbearing design is not its onlyadvantage. The design allows forthe elimination of costly elementsin the surrounding structure. Theresult is savings in both space andcost.The market demands for SpindleBearings with rings made of steeland balls of ceramic material areincreasing. Originally found only inthe high speed sector, hybridbearings are now also being usedat significantly lower speeds.The reasons lie in: their robustness and reliability their significantly extendedgrease service lifeDue to the different materials theopportunity for adhesion is alsolower. Similarly the thermal load isreduced in comparison to all steelbearings.By using hybrid bearings significantspeed increases can be achieved,this has allowed the extension ofgrease lubrication into a new rangeof applications.The resulting system cost savings,both design and operational, canbe substantial.hniek.Direct Lube BearingseuFAG Direct Lube Bearings · Hybrid Bearingswww.lager-tecThe material pairing of steel andceramic exerts significantly lowerloads on the lubricant in comparisonwith the pairing of steel and steel.The pressure ellipses are smaller,therefore there is less strain on thelubricant.4: Hybrid Spindle Bearings13
FAG Spindle Bearings.lager-techniek.euX-life ultra Bearingsww5: FAG X-life ultra Spindle BearingsX-life ultra BearingswX-life ultra Bearings were designedfor maximum demands on speedability and load. They are HybridBearings with rings made ofCronidur 30, a high nitrogenstainless steel. Compared to theconventional rolling bearing steel100Cr6, Cronidur 30 exhibits asubstantially finer structure, thusensuring cooler operation andhigher admissible contact pressure.14Tests of the material fatigue lifeexceeded the calculated values bysuch a large degree that it can beconsidered practically fail-safe inthe field of application. Undermixed friction conditions, this steelalso lasted up to 10 times longerthan the standard material 100Cr6.This steel is likewise significantlysuperior to conventional rollingbearing steels in terms of Hertziancompression strength, corrosionresistance and hot hardness.Compared to conventional bearings,the extended service life of X
With trend-setting bearing arrangement solutions for in-feed spindles, main spindles, rotary tables and linear guidance units, the Schaeffler Group and its brands INA and FAG have been at the forefront of the world market for decades. FAG Super Precision Bearings for main spindles represen
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
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Floating Displacement Bearings FD10 Super Precision Cylindrical Roller Bearings N10, N19, HCN10 NN30, NNU49 Double Direction Angular Contact Thrust Ball Bearings 2344, 2347 Angular Contact Thrust Ball Bearings for Ball Screws 7602, 7603, BSB DBSB DBSBS Axial-Radial Cylindrical Roller Bearin
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