WIXLIB

CONTENTSPrecision Technology InsideP. 4Bearing TablesSpindle BearingsP. 8Floating Displacement BearingsP. 78Super Precision Cylindrical Roller BearingsP. 84Double Direction Angular Contact Thrust Ball BearingsP. 102Angular Contact Thrust Ball Bearings for Ball ScrewsP. 112Axial-Radial Cylindrical Roller BearingsP. 128EngineeringLife Calculation for Super Precision BearingsP. 134LubricationP. 143Tolerances for Super Precision BearingsP. 150Machining Tolerances for Mating PartsP. 162Speed-Dependent FitsP. 172SpeedsP. 174Deflection and RigidityP. 176Handling of Super Precision BearingsP. 178AppendixSPICAS 2000P. 182Other ProductsP. 183Bearing CodeP. 184NotesP. 208IndexP. 209FAG · 2FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

Precision Technology InsideP. 4Spindle BearingsP. 8B719.C, B70.C, B72.C, HS70.C, HS719.C, B718.CB719.E, B70.E, B72.E, HS70.E, HS719.E, B718.EFloating Displacement BearingsFD10Super PrecisionCylindrical Roller BearingsN10, N19, HCN10NN30, NNU49Double Direction AngularContact Thrust Ball Bearings2344, 2347Angular Contact ThrustBall Bearings for Ball Screws7602, 7603, BSBDBSBDBSBSAxial-RadialCylindrical Roller BearingsRTCP. 12P. 78P. 80P. 84P. 86P. 94P. 102P. 104P. 112P. 114P. 120P. 124P. 128P. 130EngineeringP. 134AppendixP. 182FAG · 3FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

SUPER PRECISION BEARINGSPubl. No. AC 41 130/4 EA · Edition March 2002FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

PRECISION TECHNOLOGY INSIDEOptimum Customer Benefit“Precision Technology Inside”of FAG AC/SP pursues one ultimate goal:Optimum CustomerBenefit.There is far more to this conceptthan merely supplying specificproducts. It focuses on the application of FAG AC/SP super precisionproducts – and thus on the customer. This focus is built on economic efficiency reliability innovation.Being able to meet these claims requires continual contact with thecustomers, in order to learn abouttheir demands and processes. Thispermits the selection of the mostadequate product that will involvethe lowest system costs. The solidbasic research of FAG, its participation in university research projectsand its worldwide operation laythe foundations for the development of new, reliable products andtheir use in new and demandingapplications.At first glance, the accuracy ofbearings seems to be sufficientlydefined in DIN/ISO or ABEC standards. Yet FAG super precisionbearings go beyond this. In addition to demanding tolerances to P4or better, there are other performance features that are not covered by these norms. FAG superprecision bearings set standardswherever there are extreme demands in terms of reliability, highrunning accuracy and/or highspeeds – whether incorporated inmachine tools, auxiliary devices inthe textile industry, woodworkingmachines or elsewhere. The comprehensive product range permitsoptimum bearing arrangements forall types of locations and applications. The performance of FAG super precision bearings in a specificapplication is achieved in particular through close co-operation withthe customer. The higher and morecomplex the demands, the betterthe super precision bearing expertise will come to bear that has builtup in FAG application engineeringover the years. This catalogue provides a survey of the products andthe most important rules for bearing selection and bearing arrangement design. For more detailed information, please do not hesitateto turn to our competent contactpartners.This is our contribution to asuccessful partnership.FAG super precision bearingsFAG · 4FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

FAG Super Precision Bearing Range · FAG X-life ultraFAG X-life ultra bearingsFAG Super PrecisionBearing RangeAs machine tools are the main fieldof application for FAG super precision bearings, the super precisionbearing range is built up in such away that all machine tool locationsrequiring such bearings – spindles,ball screws, rotary tables – can beserved. Thanks to the high performance standard of the existingproduct range, specific tailor-madesolutions are rarely required. Thisis advantageous both in terms ofbearing availability and stock-keeping. In addition, special customer- or application-specificproducts are also developed whenever necessary.FAG X-life ultraThe FAG X-life ultra bearing represents the top product among spindle bearings. In a virtually idealway, it combines ceramic materialand special rolling bearing steelwith FAG bearing and applicationexpertise to form a top-performance unit. X-life ultra bearingsopen up possibilities for maximumspeeds and extended service lifethat offer both the machine orspindle manufacturer and the enduser an enormous potential forsystem cost reduction.FAG · 5FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

PRECISION TECHNOLOGY INSIDEProduct Features of FAG Super Precision BearingsProduct Features of FAGSuper Precision BearingsAccuracy to P4SAll important product features ofFAG super precision bearings meetPrecision Class P2 (ABEC9). Thisapplies to the dimensional andrunning accuracy as well as theparallelism of FAG bearings thatare manufactured to FAG standardP4S.Maximum precision spindle bearing arrangements can therefore bedesigned with standard FAG bearings. The experience gained withspindle bearings both in production and practical application hasencouraged the transfer of this philosophy to other types of bearings.For instance, it also applies to FAGindexing table bearings that meetthe demands of a higher precisionclass as standard for the most part.FAG RTC indexing table bearingsMaterialsFAG super precision bearings aremanufactured from high-grade materials. Wear resistance and longmaterial fatigue life up to fail-safetyare achieved through a specificheat treatment procedure for steelmaterials. Among these, Cronidur30 takes a special status. Its uniqueproperties as to alternating bending strength and corrosion resistance result in significantly extended service life, higher admissiblecontact pressure for fail-safety,higher admissible speeds and significantly enhanced lubricant ser-FAG hybrid bearingsFAG · 6FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

FAG sealed bearings, lubricated for lifevice life. The standard for spindlebearings are hybrid bearings – acombination of steel rings and ceramic balls.Cylindrical roller bearings alsocomprise ceramic rollers. Siliconnitride is the ceramic material thatcombines the typical ceramic properties in the most favourable way.Advantages compared to steel are the excellent tribological behaviour of steel and ceramics in hybrid bearings, resulting in reduced material and lubricantstress. the reduced density with correspondingly lower centrifugalforces. the lower thermal expansion coefficient with its positive effecton bearing preload. the higher elastic-modulus thathas a positive influence on bearing rigidityThese factors result in significantlyextended bearing life. For this reason, hybrid bearings are meanwhile commonly used even withlower speeds.run-in behaviour in the case ofspindles. The final result is a special product definition for whichcompliance is ensured by continuous inspections.LubricationThe lubricant plays a decisive rolein the overall consideration of thesystem ‘bearing’ as the decision infavour of either oil or grease hasan immense influence on systemcosts. Super precision bearings andFAG AC/SP lubricants permit reliable grease lubrication even atmaximum speeds. Before a lubricant is approved for such applications, it has to undergo a strict approval procedure. Here, application-specific demands play a crucial role, for instance high speeds,low temperatures and non-criticalFAG · 7FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

SPINDLE BEARINGSFAG spindle bearings are singlerow angular contact ball bearingsof the highest precision. Their special design features in terms ofcontact geometry, surface designand other properties result in high precision excellent speed-ability high rigidity good vibration behaviourof the spindles.The bearings are available in various standardized boundary dimensions which represent an importantprerequisite for bearing exchangeability. This permits optimum solutions for specific demands.FAG Universal BearingsFAG universal bearings are a speciality. They are manufactured insuch a way that they can be mounted in any arrangement withoutsuffering performance losses orcombined in different sets. Thisbrings essential logistical advantages, especially in stock-keepingof spare parts. The bearings canbe arranged according to the symbol on the outer ring surface (Picture 1).FAG · 8FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

DU DBDU DFDU DT1: Installation possibilities of a DU setSealed Spindle BearingsThanks to sealed spindle bearings,it has been possible to convert aneven wider field of applications togrease lubrication. These bearingsare filled with heavy-duty FAGgrease Arcanol L75 and fitted withnon-contact seals at both sides.Based on the experiences gainedwith sealed high-speed spindlebearings, other spindle bearing series were also designed in a sealedversion so that the following advantages ready-to-mount filled with optimum grease in theappropriate quantity protected against contaminationare now available throughout theentire bearing range (Picture 2).2: Sealed spindle bearingsFAG · 9FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc

SPINDLE BEARINGSDIRECT LUBE BearingsWhere grease lubrication meets itslimits, DIRECT LUBE bearingscomplement the spindle bearingrange in a virtually ideal way.DIRECT LUBE bearings ensurereliable lubricant feed very closeto the point of contact. This isachieved by a circumferentialgroove and radial supply holes. Integral precision O-rings seal thebearing against the spindle housing. Thanks to this special design,the high performance is coupledwith a reduction of the overallbearing system costs (Picture 3).Hybrid BearingsHybrid bearings – rings of steeland balls of ceramic material – aremost commonly used for spindlebearings. Originally only to befound in the high-speed sector,they are meanwhile also used withsignificantly lower speeds. Thereasons for this trend are their robustness and reliability their significantly extended service lifeHybrid bearings were an important prerequisite for the extendeduse of grease lubrication. In thisconnection they are a further factorfor the reduction of system costs.3: DIRECT LUBE bearing4: Bearing codeFAG · 10FAG-Hong Kong Eric Bearing Co.,Ltd, Web Site: www.fagbearing.cc