This version supersedes all previous ones. Please be informed that the bearings

Transcription

1 T E C H N I C A L C ATA L O G U E

2 T E C H N I C A L C ATA L O G U E National Engineeing Inusties Lt., pat of the 15 yea ol, multibillion olla C.K. ila goup manufactues a wie ange of all & Rolle beaings fo automotive an ailway inusty as well as fo geneal inustial applications une the ban name nbc. NEI also manufactues Steel alls an Axle oxes, pouce at plants locate at Jaipu, Newai & Manesa. NEI, foune in the yea 1946 as a pionee inusty in the fiel of beaing, manufactuing ove 1 iffeent sizes anging fom 6 mm boe to 13 mm oute iamete an having capability to manufactue beaing upto 2 mm. iamete. eaings ae manufactue fo evey possible application an equiement of moen engineeing inusty an we continue to evelop new sizes, keeping pace with api avancement in the Inian & Global engineeing inusty. NEI's technical collaboations with wol's leaing conglomeate in the fiel of beaing technology viz. M/s NTN Copoation of Japan, an M/s AMSTE Rail, USA have given a whole new imension to the pouct ange an a quality pa excellence. NEI has implemente moen concepts of Total Quality Management (TQM) an being awae the covete eming Application Pize in 21, NEI is the only beaing company in Inia to eceive this pestigious awa, NEI is also acceite with QS 9 an TS16949 cetification. NEI has also been awae Association of Ameican Railoas (AAR) fo AAR cetificate M13 fo Catige Tapee Rolle eaing in Febuay 25. NEI has been awae ISO141 cetificate fo its concen & commitment towas a cleane envionment. We at NEI ae confient that all uses of NEI poucts will fin a new pesentation of this technical catalogue useful an infomative an you ae welcome to consult, NEl fo evey assistance in selecting ight beaing fo any application that you have in min. This eition of the NC Catalogue contains all necessay infomation an ata equie fo selection of ight beaing fo specific applications. The ata is base on Intenational Stanas lai own fo the pupose an ou manufactuing expeience of moe than 6 yeas. Ou catalogue has been evise as pe the latest IS/ISO stanas fo chamfe, imensions, beaing accuacies, quality symbols an efinitions an new sizes being ae. Fo impovement as well as othe easons, the contents of this catalogue ae subject to change without pio notice.

3 CATALOGUE/TC14, JANUARY 214 This vesion supesees all pevious ones. Please be infome that the beaings mentione in this technical catalogue ae nomally manufactue in nomal toleance class, howeve, othe class beaings can be supplie against specific equiements. NEI Lt. Jaipu 214 Although cae has been taken to ensue the accuacy of the ata compile in this catalogue. NEI oes not assume any liability to any company o peson fo eos o ommisions.

4

5 MILESTONES 1946 Company Establishe as National eaing Company (NC) une Technical Collaboation with Hoffman, U.K. 195 all eaing Pouction State 1951 Railway eaing Pouction State 1957 Company name change to National Engineeing Inusties Lt. (Retaining NC as Tae Mak) 1967 Tapee Rolle eaings Pouction State une Technical Collaboation with Feeal Mogul Copoation, U.S.A Establishe Reseach & evelopment ivision 1971 Establishe Machine uiling ivision 1975 Lage iamete Special eaings Pouction State 1976 Spheical Rolle eaings Pouction State with Technical Know how fom FAGSRO 1981 Sepaate Factoy fo all eaings at Gunsi (Newai) 1982 Catige Tapee Rolle eaings Pouction State in Technical Collaboation with AMSTE Rail U.S.A Lagest eaing with Oute iamete 1.3 Mete & Weight 4.39 Tons pouce

6 1985 Technical Collaboation with NTN Copoation of Japan fo all, Cylinical & Spheical Rolle eaings 199 to95 Moenization in Thee Phases 1995 ISO 91 Cetificate 1996 Technical Collaboation with M/s Izumi Kinzoku Kogyo Co. Lt., Japan fo Machine Retofitting/Remanufactuing an ovehauling Technical Collaboation with NTN Copoation of Japan fo Tapee Rolle eaings an Hub eaings 1998 IV Phase Moenisation State 1999 Implemente Ist Phase of SAPERP Solutions. 2 QS9 & ISO141 Cetification. 23 TS16949 Cetification. 25 AAR Cetification M13 fo Catige Tapee Rolle eaing. 26 New Manufactuing facility at IMT Manesa (Hayana) 27 TPM excellence awa Newai plant. 28 TPM excellence awa Jaipu plant. 21 eming application pize fo Total Quality Management. 212 ACMA awas fo Manufactuing an Technology Excellence

7 PAGE NO. 1. ROLLING EARING CONSTRUCTION AN CLASSIFICATION eaing Classification 2. EARING ESIGNATION 5 3. EARING SELECTION 8 4. LOA RATING AN LIFE asic ynamic Loa Rating an Life 4.2 asic Static Loa Rating 4.3 Life Factos fo application 5. ACCURACY AN TOLERANCES imensional Accuacy 5.2 Running Accuacy 5.3 Toleances fo Raial eaing (except Tape Rolle eaings) 5.4 Toleances fo Tapee Rolle eaing (Metic Seies) 5.5 Toleances fo Tapee Rolle eaing (Inch Seies) 5.6 Toleances fo Thust all an Rolle eaing (Inch Seies) 5.7 Chamfe imensions Limits fo Rolle eaing 5.8 asic Tapee oe, Tape 1:12 6. EARING INTERNAL CLEARANCE Intenal Cleaance Selection 6.2 Raial Intenal Cleaance Value 7. LURICATION Types of Lubication 7.2 Methos of Oil Lubication 8. SEATINGS, LIMITS AN FITS Seatings 8.2 Fits 8.3 Limits an Fit guielines 9. EARING HANLING Mounting 9.2 ismounting & Replacement 9.3 eaing Cleaning 9.4 Abutment fo eaing 1. EARING FAILURE Why eaing Fails 1.2 eaing amage & Coective Measues

8 PAGE NO. 11. EARING TALES Single Row Raial all eaings (Metic seies) Single Row Raial all eaings (Special eaings) Single Row Raial all eaings (Inch seies) Single Row Angula Contact all eaings (Metic seies) Single Row Angula Contact all eaings (Inch seies) Single Row Extenally Aligning all eaings ouble Row Self Aligning all eaings (Metic seies) ouble Row Self Aligning all eaings (Inch seies) ouble Row Self Aligning all eaings with Tape Clamping Sleeve an Nut Special eaing Races ouble Row Angula Contact Seale eaings Special eaings Single Row Cylinical Rolle eaings (Metic seies) Single Row Cylinical Rolle eaings (Inch seies) Multi Row Cylinical Rolle eaings Special Cylinical Rolle eaings ouble Row Cylinical Rolle Seale Unit (Inch seies) Single Row Tapee Rolle eaings (Inch seies) Single Row Tapee Rolle eaings (Metic seies) ouble Row Tapee Rolle eaings Fou Row Tapee Rolle eaings Thust eaings Spheical Rolle eaings AAR Stana Catige Tapee Rolle eaings Metic Catige Tapee Rolle eaings Units Specifie in SI System Steel alls Convesions Tables 134

9 1. ROLLING EARING CONSTRUCTION AN CLASSIFICATION Rolling beaings ae geneally compose of beaing ings, olling elements an cages. Seveal olling elements ae place between two beaing ings an cages pevent the olling elements fom contact an with such a stuctue, a smooth olling action becomes possible. Rolling beaings ae ivie into aial beaings an thust beaings, mainly epening on the applicable loa iection. Raial beaing mainly take aial loas. Most types of aial beaings can also take thust loas. Thust beaings geneally take thust loas only an not aial loas. Rolling beaings ae lagely ivie into ball beaings an olle beaings in accoance with the types of olling elements, Rolle beaings ae futhe ivie epening on the shape of the olle into cylinical olle beaings tapee olle beaings, spheical olle beaings an neele olle beaings. all beaings ae ivie into seveal types, epening on the shape of beaing ings an the contact position between the balls an the aceway. The cages of olling beaings ae ivie into pesse an machine ones with the shapes iffeing accoing to the beaings type an conitions of use. 1.1 eaing Classification Single Row Raial all eaings The Single ow aial ball beaings accommoate pue aial, pue axial o any combination of aial an axial loas within its capacity. These can opeate at vey high spees. Fo these easons an its economical pice, it is the most wiely use beaing. Owing to high egee of confomity between balls an aceways, the self aligning capability of eep goove ball beaings is small. This fact calls fo well aligne beaing mountings. Oute ing Inne ing Cage all These beaings can be locate enwise in both the iections. iffeent vaiations in the type ae as shown below : eep Goove single Row all eaing Z ZZ ONE UST SHIEL TWO UST SHIEL SHIEL TYPE LU/LH LLU/LLH ONE RUER SEAL TWO RUER SEALS SEAL TYPE RS ONE RUER SEAL RSS TWO RUER SEALS N NR ZNR ZZNR SNAP RING GROOVE SNAP RING SNAP RING & ONE UST SHIEL SNAP RING & TWO UST SHIELS 1

10 TM all eaings TM ball beaings have the same bounay imensions as stana eep goove ball beaings, but have unegone a special heat teatment that consieably extens wea life. These beaings wee especially effective in counteing euce wea life ue to the effects of infiltation of ust an othe foeign matte. TM ball beaings special chaacteistics ae ientical to stana ball beaings at ate loas, but with a beaing chaacteization facto of a 2 = 2.2 TM 62 seies beaings can be use in place of stana 63 seies beaings enabling lighte weight, moe compact esigns. Fo imensional specifications an othe etaile infomation about TM ball beaings, contact NEI Technical Cell. SINGLE ROW RAIAL ALL EARING WITH TAPER ORE Single Row Raial all eaing with Tapee oe The single ow aial ball beaings with tapee boe ae ientical to single ow aial ball beaings except that these have tapee boe which is use fo easie mounting an fo the ajustment of aial cleaance. imensions of tapee boe iamete efe to small boe Single Row Angula Contact all eaing The single ow angula contact ball beaings have highe axial loa capacity than the single ow aial ball beaings. The aial loa must always be less than axial loa. SINGLE ROW ANGULAR CONTACT ALL EARING The beaings can cay axial loa in one iection only an shoul be ajuste against anothe beaing, if axial loa is coming fom both the iections. Each beaing can be locate enwise in one iection only Single Row Extenally Aligning all eaing The single ow extenally aligning ball beaings ae use whee accuate alignment can not be guaantee between beaing positions. It can take aial loas. Axial loas can also be accommoate. The shell housing must not be mae an intefeence fit on thei outsie iamete. If an intefeence fit is use, the shell housing may contact an pevent alignment. SINGLE ROW EXTERNALY ALIGNING ALL EARING These beaings can be locate enwise in both the iections ouble Row Self Aligning ali eaing 2 1 The ouble ow self aligning ball beaings have the common oute spheical ace fo both the ows. This featue gives the beaings self aligning popeties. The beaings have the same extenal imensions as thee equivalent single ow aial ball beaings. They can take aial loas an vey light axial loas. They can be locate enwise in both the iections. CYLINRICAL ORE TAPERE ORE 1:12 ouble Row Self Aligning ali eaing

11 1.1.6 ouble Row SelfAligning all eaing with Tapee Clamping Sleeve an Nut The ouble ow selfaligning ball beaings with tapee clamping sleeve an nut ae ientical to ouble ow selfaligning ball beaing except that these have a tapee boe, which is use fo easie mounting an also a clamping sleeve an nut to clamp the beaings on the shaft. The tapee boe is also use fo the ajustment of aial cleaance. ouble Row SelfAligning all eaing with Tapee Clamping Sleeve an Nut Thust all eaing The thust ball beaings ae use fo high axial loas at low spees. These can not opeate at high spee as it will give ise to centifugal o aial foces which can not be taken by the beaings. They can be locate enwise in one iection only. CAGE UPPER THRUST PLATE Cylinical Rolle eaing ALL Thust all eaing LOWER THRUST PLATE The cylinical olle beaings have geate aial loa capacity than ball beaings of same extenal imensions an ae paticulaly suitable fo auous uties. The beaing featues a moifie line contact between olles an aceways to eliminate ege stessing. These beaings have a high aial loa capacity an ae suitable fo high spees. ue to etachable esign chaacte they have avantage of mounting inne ing an oute ing sepaately. The iection of axial loa which a beaing can take epening upon the geomety of the beaing. Many vaiations available ae shown below : Special Cylinical Rolle eaing Type NU Type NJ Type NH = NJ+NJ Type NUP Type N Type NF Type RNU Type RN 3

12 1.1.9 Tapee Rolle eaing Tapee olle beaings ae esigne in such a way that vetices of the cone fo each olle an those fo the inne an oute aceways coincies on the beaing axis o extensions of the aceways an olles convege at a common point on the axis of otation. This esults in tue olling motion of the olles on the aceways at evey point along the olles. The tapee olle beaings suppot aial loas an axial loas fom one iection only. The line contact between olles an aceways povie the beaings with a high loa caying capacity. Steep angle tapee olle beaing with exceptionally steep cone angle enables the beaings to take heavie axial loa. The beaings ae of sepaable type, enabling sepaate mounting of cups an cones. Since the tapee olle beaings can absob thust loas in one iection only, these beaings shoul geneally be installe as oppose mountings. The coect amount of aial an axial cleaance is obtaine by ajusting the two beaings against each othe. esies, ouble ow an fou ow tapee olle beaings ae also wiely use fo heavy loas such as olling mills. A single ow tapee olle beaing can be locate enwise in one iection only. Oute ing Rolle Cage Inne ing Tapee Rolle eaing Spheical Rolle eaing Spheical olle beaings ae paticulaly suitable fo caying heavy loas. They ae usually of the ouble ow esign, both of the ows of the olles having common spheical aceways in the oute ing. This featue of this beaing has geat pactical impotance in those cases whee it is ifficult to obtain exact paallelism between the shaft an housing both axes. So these beaings ae suitable whee misalignment can aise fom mounting eos o fom eflection of the shaft. Spheical Rolle eaing 4 1

13 2. EARING ESIGNATION Rolling beaing pat numbes inicate beaing type, imensions, toleances, intenal constuction & othe elate specifications. The fist lette (igit) inicates the beaing type. The secon igit inicates the with (o height) seies & the thi inicates the iamete seies. The last two igits inicate the boe iamete by multiplying the last two igit by five fo beaing having boe iamete oiginal 4 mm & above. This metho is applicable fo metic seies beaing only. Example 627 Z C Raial intenal Cleaance C3 Shiele (one sie) Nominal boe iamete 35mm iamete seies 2 eep goove ball beaing Nominal boe iamete 14mm iamete seies 3 iamete seies2 Spheical olle beaing 7212C NU33C3 Contact angle 15 Nominal boe iamete 6mm iamete seies 2 Angula contact ball beaing Raial intenal cleaance C3 Nominal boe iamete 15mm iamete seies 3 Cylinical olle beaing NU type K Nominal boe iamete 2mm iamete seies 2 With seies Tapee olle beaing Tapee boe (1:12) Nominal boe iamete 3mm iamete seies 2 Self Aligning ball beaing 5

14 Table 2.1 Pefix coe Coe Intepetation TS1 eaing with special heat teatment fo opeating temp. up to 13 C TS2 eaing with special heat teatment fo opeating temp. up to 16 C TS3 eaing with special heat teatment fo opeating temp. up to 2 C TS4 eaing with special heat teatment fo opeating temp. up to 25 C TM Long life special heatteate beaing (one ing) TM Long life special heatteate beaing (both the ings) AST eaing with one of the components teate in cabo nitiing AST eaing with both the components teate in cabo nitiing TMS2 eaing with special heat teatment (TM + TS2) TH2 eaing with hign temp. tempeing on both the ings TMH2 eaing with special heat teatment (TM + TH2) CR Ceep esistance beaing with single sie Oing on oute ace CR2 Ceep Resistance beaing with both sie 'O' ing on oute ace L Light seies (tape olle beainginch seies) LM Light meium seies (tape olle beaing inch seies) HM Heavy meium seies (tape olle beainginch seies) M Meium seies (tape olle beaing inch seies) H Heavy seies (nonintechangable with othe cones & cups fo tape olle beaing inch seies) HH Heavy heavy seies (nonintechangable with othe cones & cups fo tape olle beainginch seies) N Tape beaing having nonstana bounay imensions N Cylinical beaing having nonstana bounay imensions NA Cones mate with ouble cup to fom ouble ow nonajustable beaing (nonintechangable with othe cones & cups) X Inch seies tapee olle beaing convete into metic seies T tapee olle thust beaing J Inch seies beaing with metic esignation Seies coe NU1 NU2 NU22 NU3 NU23 NU4 NNU49 NN eaing Nomenclatue eaing type 6 eep goove ball beaings 7 Angula contact ball beaings 1,2 Self aligning ball beaings NU, NJ, NH, NUP, N, NF, NNU, NN, RNU, RN Cylinical olle beaings 3 Tapee olle beaings 2 Spheical olle beaings eaing basic numbe Intepetation imension seies coe With seies ia. Seies oe iamete coe /.6 /1.5 /xx /5 /53 /56.. /2,36 /2,5 Intepetation oe ia., mm xx ,36 2,5 Suffix coe Intenal esign moification coe A Intenal esign moification fom A onwa Contact angle 4, angula contact ball beaing Contact angle 1 ~17, Tapee olle beaings C contact angle 15, angula contact ball beaing C Contact angle 17 ~24, Tapee olle beaings C(n),CS(n) eep goove ball beaing with incease loa atings (C1, C2 etc.) Contact angle 24 ~32, Tapee olle beaings ia. coe E Cylinical/Spheical olle multiplie beaing with optimze by 5 gives intenal geomety fo the boe ia. incease loa ating value in mm E Tapee olle beaing with special cown on aceways M Moifie esign (ball beaing, tapee olle beaing) X(n) Special featue (Inne ing o oute ing) e.g. X1, X2 SPL Optimize intenal esign fo low toque C Spheical olle beaing with symmetical olles, flangeless inne ing, a nonintegal guie ing between the two ows of olles cente on the inne ing an one pesse steel winowtype cage fo each olle ow CA Spheical olle beaing with onepiece machine bass cage (ouble ponge), symmetical olles an etaining ibs CC Simila to 'C' configuation but with enhance olle & aceways suface finish V Full complementy cylinical olle beaing SP stana beaing with eviations in O/with fom oiginal beaing numbe QJ Fou point angula contact ball beaing,ls,ms all beaing with nonstana bounay imensions Spheical olle thust beaings

15 Suffix coe Extenal esign moification coe eaing aangement type coe Cage type coe Seal/Shiel type coe Intenal cleaance coe Toleance class coe Lubicant type coe Noise class coe ouble ow oute ing o inne ing K Tapee boe, 1/12 tape on ia. K3 Tapee boe, 1/3 tape on ia. N Locating snap ing goove on oute ing NR Locating snap ing on oute ing G Helical goove in beaing boe (Multiow tapee/ cylinical olle beaing components) RO Moifie pofile on oute ing suface RI Moifie pofile on inne ing suface W Lubication gooves / slots in the sie faces of the beaing ings (Multiow tapee olle beaings) W33 eaing with annula goove an thee lubication holes in the oute ing (Spheical olle beaing) W33X Simila to 'W33' configuation but with six lubication holes Two singleow eep goove /angula contact ball/ tapee olle beaing matche fo mounting in a backtoback aangement F Two singleow eep goove/ angula contact ball/ tapee olle beaing matche fo mounting in a facetoface aangement T Two singleow eep goove/ angula contact ball/ tapee olle beaing matche fo mounting in a tanem aangement J Pesse steel cage T2X Polyamie cage G2 Pin type steel cage MA Machine bass cage, oute ing guie (spheical / cylinical olle beaing) M Machine bas cage, inne ing guie (spheical / cylinical olle beaing) L,R Synthetic ubbe seal, contact type, on one sie LL,RR Synthetic ubbe seal, contact type, on both sie L Synthetic ubbe seal,noncontact type, on one sie LL Synthetic ubbe seal,non contact type, on both sie LC Synthetic ubbe seal with gua steel plate, contact type, ouble lip, on one sie LLC Synthetic ubbe seal with gua steel plate, contact type, ouble lip, on both sie LH Low fiction synthetic ubbe seal, contact type, ouble lip, on one sie LLH Low fiction synthetic ubbe seal, contact type, ouble lip, on both sie LU Synthetic ubbe seal, contact type, ouble lip, on one sie LLU Synthetic ubbe seal, contact type, ouble lip, on both sie LLF Synthetic ubbe seal, noncontact type, on both sies LV Low fiction synthetic ubbe seal, contact type, tiple lip, on one sie LLV Low fiction synthetic ubbe seal, contact type, tiple lip, on both sie LUA Acylic ubbe seal (Contact type), single sie with Seal goove on Inne ace LLUA Acylic ubbe seal (Contact type), both sie with Seal goove on Inne ace LUA1 Fluoine ubbe seal, LU type, on one sie, fo high tempetue upto 2 C LLUA1 Fluoine ubbe seal, LU type, on both sie, fo high tempetue upto 2 C LUA2 Silicone ubbe seal, LU type, on one sie, fo exteme tempetue1 to +2 C LLUA2 Silicone ubbe seal, LU type, on both sie, fo exteme temp. 1 to +2 C RS NR ubbe seal (Contact type), single sie with no Seal goove on Inne ace RSS NR ubbe seal (Contact type), on both with no Seal goove on Inne ace RSZ RS type ubbe seal on one sie, Z type pesse steel shiel Z Metalic shiel, single sie ZZ Metalic shiel, ouble sie ZA Removable pesse steel shiel, on one sie ZZA Removable pesse steel shiel, on both sie C2 Cleaance less than Nomal CN Nomal cleaance C3 Cleaance geate than nomal C4 Cleaance geate than C3 C5 Cleaance geate than C4 CNL Raial cleaance ange on lowesie of CN C3L Raial cleaance ange on lowe sie of C3 C4L Raial cleaance ange on lowe sie of C4 C5L Raial cleaance ange on lowe sie of C5 CNH Raial cleaance ange on highe sie of CN C3H Raial cleaance ange on highe sie of C3 C4H Raial cleaance ange on highe sie of C4 C5H Raial cleaance ange on highe sie of C5 CS(n) Special aial cleaance as pe custome equiement P Nomal Toleance class (Class, 6X) specifie by IS/ISO/JIS P6Toleance class 6 specifie by IS/ISO/JIS P5 Toleance class 5 specifie by IS/ISO/JIS P4 Toleance class 4 specifie by IS/ISO/JIS P2 Toleance class 2 specifie by IS/ISO/JIS PX(n) Special toleance class as pe custome equiement 2A Shell Alvania2 gease (Shell Alvania RL2) 3A Shell Gaus S2 V1 3 (Shell Alvania RL3) R2 Shell Gaus S3 V22C 2 (Shell Retinex LX2) 2E Uniex N3 gease E5 NTN L417 6 Pyonoc N6 6C Pyonoc N6C NS Nigace WRS A2 Shell Albia 2 5C Chevon SRI KA KLUER ASONIC HQ 7212 KS Klube Synth EP 7282 EM Noise level class fo electic moto application EML Low Noise beaings 7

16 The following poceue gives the steps to be followe when beaings ae selecte fom the infomation containe in this catalogue. It will be foun satisfactoy fo most applications, but to be sue, please consult the NEI Avisoy Sevice. 1. a. etemine the spee of the beaing. b. Calculate the loas on the beaing. 2. Establish if accuate alignment can be obtaine between the beaing seating. If it can not, then beaings that accommoate misalignment shoul be selecte. 3. If the beaing is to otate une loa, ecie the life equie, calculate the equie 'C' value, an then select suitable beaing that have compaable 'C' value. 4. Check if the beaing is suitable fo the spee an ecie if gease o oil is to be the lubicant. 5. Select a suitable beaing aangement if this is not aleay known. Make sue that this aangement is suitable to seating fits. 6. Finally a. ecie whethe 'Stana' o 'Exta Pecision limit of accuacy is equie. b. select the most suitable ange of iametic cleaance. c. choose the abutment iametes.. choose suitable closues. e. issue mounting an hanling instuctions fo the beaings if necessay. Please consult NEI i) If beaings ae equie in coosionesisting o in othe special mateials. ii) If two beaings ae mounte close togethe, special paiing of the two beaings may be necessay to ensue that they shae the loa. iii) If the spee an tempeatue conitions ae not povie fo the infomation containe in this catalogue. EARING SELECTION Y NEI AVISORY SERVICE Ou Enginees will be please to ecommen the most suitable beaing an best metho of mounting fo any specifie conitions. If you wish to use this sevice you shoul sen all infomation elevant to you pupose on the following basis. 3. EARING SELECTION 1. Povie a awing o sketch showing layout of the pats involve an position in which the beaings ae to be fitte, giving size of shaft an any imensions limitingthe space available. 2. Inclue a bief esciption of the mechanism if this is not clea fom the awing. 3. Give the spee an sufficient infomation, so that loa on each beaing can be calculate accuately. 4. Inicate any unusual featues such as the possibility of shock o vibation, unbalance loa, high tempeatue, o the pesence of it, moistue o fumes. 5. Give the beaing life equiements an inicate whethe the uty is continuous fo 24 hs. a ay, o only intemittent. If intemittent, give peios of unning an staning. 6. If the woking conitions vay consieably, give the nomal uty an also the peak conitions with the fequency an uation of peaks. 7. Say whethe oil o gease lubication is to be use. 8. Say whethe the beaings can be line up accuately o whethe beaings with an aligning featue ae equie. 8

17 4. LOA RATING AN LIFE 4.1 asic ynamic Loa Rating an Life The basic ating life can also be expesse in tems of kilometes fo wheel beaings as shown in fomula below : L 1S = x L1 1 Whee = Wheel iamete in mm L 1S = asic ating life in kms. The value of f an the ating life fo ball an olle beaing n can be foun by means of the iagams given on page no Ajuste life ating facto The basic life ating (9% eliability facto) can be calculate though the fomula mentione above. Howeve, in some applications a beaing life facto of ove 9% eliability may be equie to meet these equiements, beaing life can be lengthene by the use of specially impove beaing mateial o special constuction technique. Moeove accoing to elastohyoynamic lubication theoy, it is clea that the beaing opeating conitions (lubication, tempeatue, spee, etc.) all exet an effect on beaing life. All these ajustment factos ae taken into consieation while calculating beaing life an using the life, ajustment facto as pescibe in ISO 281, the ajuste beaing life is aive at. L = a. a. a. na C ( P ) p Whee, L na : Ajustment life ating in millions of 6 evolutions (1 ) ajuste fo eliability, mateial an opeating conitions a : Reliability ajustment facto 1 a 2 : Mateial/constuction ajustment facto a 3 : Opeating conition ajustment facto Life ajustment facto fo eliability a 1 The values fo the eliability ajustment facto a ( fo a 1 eliability facto highe than 9% ) can be foun fom table given below : Reliability ajustment facto values C ( P ) p ( ) 1/p Reliability Ln L 1 L 5 L 4 L 3 L 2 L 1 Reliability facto a n C ( P ) p Fomula fo facto a 1 a = 4.48[Ln(1/R)] 2/3 1 R = Reliability L n = Log Facto (ase 'e') 9

18 Life ajustment facto fo mateial constuction a 2 The value fo the basic ynamic loa ating given in the beaing imension tables ae fo beaings constucte fom NEI's continue effots at impoving the quality an life of its beaings. Accoingly, a 2 = 1 is use fo the ajustment facto in the fomula. Fo beaings constucte of specially impove mateials o with special manufactuing methos, the life ajustment facto a 2 in life can have a value geate than one. When high cabon chomium steel beaings, which have unegone only nomal heat teatment, ae opeate fo long peios of time at tempeatues in excess of 12 C consieable imensional efomation may take place. Fo this eason, thee ae special high tempeatue beaings which have been heat teate fo imensional stability. This special teatment allows the beaing to opeate at its maximum opeational tempeatue without the occuence of imensional changes. Howeve, these imensionally stabilize beaings, esignate with a 'TS' pefix have a euce haness with a consequent ecease in beaing life. The ajuste life facto values use in life fomula fo such heatstabilize beaing can be foun in Table given below Coe TS2 TS3 TS4 Max. opeating tempeatue C Ajustment facto a Life ajustment facto a fo opeating conitions 3 The opeating conitions life ajustment facto a 3 is use to ajust fo conitions such as lubication, opeating tempeatue, an othe opeation factos which have an effect on beaing life. Geneally speaking when lubicating conitions ae satisfactoy the a facto has a value of one, an when 3 lubicating conitions ae exceptionally favouable, an all othe opeating conitions ae nomal a can have a value 3 geate than one. Howeve, when lubicating conitions ae paticulaly unfavoable an oil film fomation on the contact sufaces of the aceway an olling elements is insufficient, the value of a 3 becomes less than one. This insufficient oil film fomation can be cause, fo example, by the lubicating oil viscosity being too low fo the opeating tempeatue 2 2 (below 13 mm /s fo ball beaing an below 2mm /s fo olle beaings); o by exceptionally low otational spee [n (/min) x p (mm) less than 1,]. Fo beaings use une special opeating conitions, please consult NEI. Life ajustment value a Opeating Tempeatue C Life ajustment value fo opeating tempeatue C As the opeating tempeatue of the beaing inceases, the haness of the beaing mateial eceases. Thus, the beaing life coesponingly eceases. The opeating tempeatue ajustment values ae shown in above figue. all beaings Rolle beaings n fn L1h fh n fn L1h ev/min h ev/min h Fig. iagam fo basic ating life fh

19 4.2 asic Static Loa Rating The Static loa is efine as a loa acting on a nonotating beaing. Pemanent efomation appeas in olling elements an aceways une static loa of moeate magnitue an inceases gaually with inceasing loa. The pemissible static loa, theefoe, epens upon the pemissible magnitue of pemanent efomation. Expeience shows that total pemanent efomation of.1 times of the olling element iamete, occuing at the most heavily loae olling element an aceway contact can be toleate in most beaing applications without impaiment of beaing opeation. In cetain applications whee subsequent otation of the beaing is slow an whee smoothness an fiction equiements ae not too exacting, a much geate total pemanent efomation can be pemitte. On the othe han, whee exteme smoothness is equie o fiction equiements ae citical, lesstotal pemanent efomation may be toleate. Fo pupose of establishing compaative atings, the basic static loa ating theefoe, is efine as that static aial loa which coespons to a total pemanent efomation of olling element an aceway at the most heavily stesse contact set at.1 times of the olling element iamete. It applies to pue aial loa fo aial beaing an pue axial loa fo thust beaing. In single ow angula contact beaing, the basic static loa ating elates to the aial component of the loa, which causes a puely aial isplacement of the beaing ings in elation to each othe. The maximum applie loa values fo contact stess occuing at the olling element an aceway contact points ae as follows : Fo ball beaing Fo self aligning ball beaing Fo olle beaing 42MPa 46MPa 4MPa The static equivalent loa is efine as that static aial loa, which, if applie to eep Goove all beaings, Angula Contact o Rolle beaings woul cause the same total pemanent efomation at the most heavily stesse olling element an aceway contact as that which occus une the actual conitions of loaing. Fo thust beaings the static equivalent loa is efine as that static, cental, puely axial loa which, if applie, woul cause the same total pemanent efomation at the most heavily stesse olling element an aceway contact as that which occus une the actual conition of loaing. 11

20 4.3 Life Facto fo Applications Sevice Requiements Machines use occasionally Life facto f h < oo mechanisms measuing instuments Equipment fo shot peio o intemittent sevice inteuption pemission Meical equipment Househol appliances, electic han tools, agicultue machines, lifting tackles in shop Intemittent sevice machines high eliability Powe station auxiliay equipment, constuction machines, Cane sheaves elevatos, Conveyos, eck canes, Canes Cane Sheaves Machines use fo 8 hous a ay but not always in full opeation Automobiles, motocycles, intenal gining spinles, oe tub axles uses, Tucks Woo woking machines, gea ives, plunge pumps vibating sceens Small electic motos, gining spinles, boing machine spinles otay cushes, inustial Wagon axles Lathe spinles, pess flywheels pinting machines Agitatos impotant gea units Machines fully use fo 8 hous Small olling mill ollnecks Lage olling mill ollnecks, olling mill table olles, excavatos centifugal sepeatos continuous opeation conveyos Inustial electic motos, blowes, ai conitiones steet ca o feight wagon axles, geneal machiney in shop, continuous opeation canes Lage electic motos, olling mill gea units plastic extues, ubbeplastics calena olls, ailway vehicle axles, taction motos, conveyos in geneal use Locomotive axles, ailway vehicle gea units, false twist textile machines Machines continuously use fo 24 hous a ay Loom Electic motos in shop compessos, pumps Textile machines, mine winches, ion inusty conveyos Papemaking machine, main olls machines Machines continuously use fo 24 hous a ay with maximum eliability pumps Powe station equipments, watesupply equipments fo uban aeas, mine ain 12

21 The accuacy of olling beaings is classifie as imensional accuacy an unning accuacy. imensional accuacy inicates the toleance an toleance limits of bounay imensions as well as the toleance limits of with vaiations an of the tape of tapee boe. Running accuacy inicates the toleance limits of outsie cylinical suface unout with sie, aial unout, sie unout with boe an axial unout. 5.1 imensional Accuacy 5. ACCURACY AN TOLERANCES imensional accuacies of a beaing inclue the acceptable eviations fo beaing bounay imensions i.e. boe iamete, oute iamete, assemble beaing with. Fom eos of iniviual ings ae also inclue in imensional accuacies. Inne Ring fom eos ae single plane boe iamete vaiationvp (ounness), mean single plane boe iamete vaiationvmp (tape), with vaiationvs (paallelism of sie faces), aceway ounness & tape, flatness of faces an Oute Ring fom eos ae single plane outsie iamete vaiationvp (ounness), mean single plane outsie iamete vaiationvmp (tape), with vaiation VCs (paallelism of sie faces), aceway ounness & tape, flatness of faces. 5.2 Running Accuacy (As pe ISO: & 2) Raial Runout a Raial unout of assemble beaing inne ing, Kia (aial beaing): iffeence between the lagest an the smallest of the aial istances between the boe suface of the inne ing, in iffeent angula positions of this ing, an a point in fixe position elative to the oute ing. At the angula position of the point mentione, o on each sie an close to it, olling elements ae to be in contact with both the inne an oute ing aceways an (in a tapee olle beaing) the cone back face ib, the beaing pats being othewise in nomal elative positions. b a = Loa on inne ing Kia MEASUREMENT OF TAPER ROLLER EARING Raial unout of assemble beaing oute ing, Kea (aial beaing) : iffeence between the lagest an the smallest of the aial istance between the outsie suface of the oute ing, in iffeent angula positions of this ing, an a point in a fixe position elative to the inne ing. At the angula position of the point mentione, o on each sie an close to it, olling elements ae to be in contact with both the Inne an oute ing aceways an (in a tapee olle beaing) the cone back face ib, the beaing pats being othewise in nomal positions. a = Loa on inne ing Kea MEASUREMENT OF ALL EARING a = Loa on inne ing a = Loa on inne ing Kia MEASUREMENT OF ALL EARING Kea MEASUREMENT OF TAPER ROLLER EARING 13

22 5.2.2 Face unout with aceway a Assemble beaing inne ing face unout with aceway, Sia (goove type aial ball beaing) : iffeences between the lagest an the smallest of the axial istances between the efeence face of the inne ing, in iffeent elative angula positions of this ing, at a aial istance fom the inne ing axis equal to half the inne ing aceway contact iamete, an a point in a fixe position elative to the oute ing. The inne an the oute ing aceways ae to be in contact with all the balls. C Assemble beaing oute ing face unout with aceway Sea (goove type aial ball beaing) : iffeence between the lagest an the smallest of the axial istances between the efeence face of the oute ing, in iffeent elative angula positions of this ing, at a aial istance fom the oute ing axis equal to half the oute ing aceway contact iamete, an a point in a fixe position elative to the inne ing. The inne an oute ing aceways ae to be in contact with all the balls. a = Loa on inne ing a = Loa on inne ing Sea MEASUREMENT OF ALL EARING Sia MEASUREMENT OF ALL EARING b Assemble beaing cone back face unout with aceway, Sia (tapee olle beaing) : iffeence between the lagest an the smallest of the axial istances between the cone back face, in iffeent angula positions of the cone, at a aial istance fom the cone axis equal to half the cone aceway contact iamete an a point in a fixe position elative to the cup. The cone an cup aceways an the cone back face ib ae to be in contact with all the olles, the beaing pats being othewise in nomal elative positions. Assemble beaing cup back face unout with aceway Sea (tapee olle beaing) : iffeence between the lagest an the smallest of the axial istances between the cup back face, in iffeent angula positions of the cup, at a aial istance fom the cup axis equal to half the cup aceway contact iamete, an a point in a fixe position elative to the cone. The cone an cup aceways an the cone back face ib ae to be in contact with all the olles, the beaing pats being othewise in nomal elative positions. a = Loa on inne ing a = Loa on inne ing Sia MEASUREMENT OF TAPER ROLLER EARING Sea MEASUREMENT OF TAPER ROLLER EARING 14

23 5.2.3 Face unout with boe Face unout with boe, S (inne ing efeence face): iffeence between the lagest an the smallest of the axial istances between a plane pepenicula to the ing axis an the efeence face of the ing, at a aial istance fom the axial of half the inne ing aceway contact iamete. S MEASUREMENT Raceway paallelism with face Raceway paallelism with face, Sio Se (inne o oute ing of goove type aial ball beaing efeence face) : iffeence between the lagest an the smallest of the axial istances between the plane tangential to the efeence face an the mile of the aceway. Se MEASUREMENT Outsie suface inclination Vaiation of outsie suface geneatix inclination with face, S (oute ing basically cylinical suface efeence face ) : Total vaiation of the elative position in a aial iection paallel with the plane tangential to the efeence face of the oute ing, of points on the same geneatix of the outsie suface at a istance fom the sie faces of the ing equal to the maximum limits of the axial chamfe imension. Si MEASUREMENT S MEASUREMENT 15

24 5.2.6 Thicknessvaiation a Inne ing aceway to boe thickness vaiation, Ki (aial beaing) : iffeence between the lagest an the smallest of the aial istances between the boe suface an the mile of a aceway on the outsie of the ing. b Oute ing aceway to outsie suface thickness vaiation, Ke (aial beaing) : iffeence between the lagest an the smallest of the aial istances between the outsie suface an the mile of a aceway on the insie of the ing. Ki MEASUREMENT Ke MEASUREMENT Table fo 5.1 & 5.2 eaing Types, Applicable stanas an Compaison of toleance classes among all stanas eaing type Raial ball beaings Raial olle beaings (except tapee olle beaings) Tapee olle beaings metic seies inch seies Thust beaings (all types) Applicable stanas Toleance classes & compaison among stanas ISO 492 Class,6X Class 6 Class 5 Class 4 Class 2 JIS 1514 Class,6X Class 6 Class 5 Class 4 Class 2 IN 62 P P6 P5 P4 P2 AMA St.2 AEC1 AEC3 AEC5 AEC7 AEC9 ISO 492 Class,6X Class 6 Class 5 Class 4 Class 2 JIS 1514 Class,6X Class 6 Class 5 Class 4 Class 2 IN 62 P P6 P5 P4 P2 AMA St.2 REC1 REC3 REC5 ISO 492 Class,6X Class 6 Class 5 Class 4 Class 2 JIS 1514 Class,6X Class 6 Class 5 Class 4 Class 2 IN 62 P P6 P5 P4 P2 AMA St.19.1 Class K Class N Class C Class Class A ISO 578 Class 4 Class 3 Class Class JIS 1514 Class,6X Class 6 Class 5 Class 4 Class 2 IN 62 P P6 P5 P4 P2 AMA St.19 Class 4 Class 2 Class 3 Class Class ISO 199 Nomal class Class 6 Class 5 Class 4 JIS 1514 Class,6X Class 6 Class 5 Class 4 Class 2 IN 62 P P6 P5 P4 P2 AMA St. Refeence table no. Table 5.3.1, Table 5.3.1, Table 5.4.1, Table 5.5.1, 5.5.2, Table 5.6.1,

25 5. 3 Toleances Fo Raial eaings (except Tapee Rolle eaings) (As pe ISO 492, IS 5692) Symbols = beaing boe iamete, nominal 1 = basic iamete at theoetical lage en of a basically tapee boe s = eviation of a single boe iamete mp = single plane mean boe iamete eviation (fo a basically tapee boe mp efes only to the theoetical small en of boe) 1mp = mean boe iamete eviation at theoetical lage en of a basically tapee boe V p = boe iamete vaiation in single aial plane V mp = mean boe iamete vaiation ( this applies only to a basically cylinical boe) α = half of the total angle of inne ing boe (fo tape boe beaings) = beaing outsie iamete, nominal 1 = oute ing flange outsie iamete, nominal S = eviation of single outsie iamete mp = single plane mean outsie iamete eviation V p = outsie iamete vaiation in a single aial plane V mp = mean outsie iamete vaiation = inne ing with, nominal S = eviation of single inne ing with V S = inne ing with vaiation C = oute ing with, nominal C 1 = oute ing flange with, nominal CS = eviation of single oute ing with C1S = eviation of a single oute ing flange with V CS = oute ing with vaiation V C1S = oute ing flange with vaiation K ia = aial unout of assemble beaing inne ing K ea = aial unout of assemble beaing oute ing S = inne ing efeence face (back face, whee applicable) unout with boe S = vaiation of beaing outsie suface geneatix inclination with oute ing efeence face (back face) S 1 = vaiation of beaing outsie suface geneatix inclination with flange back face S ia = assemble beaing inne ing face (backface) unout with aceway Sea = assemble beaing oute ing face (backface) unout with aceway Sea1 = assemble beaing oute ing flange backface unout with aceway O O 171

26 Toleances fo Nomal Toleance Class Raial eaings (Except Tapee Rolle eaings) METRIC SERIES Ove (mm) TALE : INNER RING Values in micons Vp mp iamete Seies Vmp K ia 9,1 2,3,4 Incluing High Low Max S All Nomal Moifie VS Max Max High Low Max TALE 5.3.2: OUTER RING 18 Ove VP Cappe mp Open eaings eaing cs Vcs iamete Seies Vmp Kea c1s Vc1s 9,1 2,3,4 2,3,4 Incluing High Low Max Max Max Max High Low Max Ientical to S an V S of Inne ing of same beaing (mm) Values in micons

27 5.4 Toleance Fo Tapee Rolle eaing (METRIC SERIES) NORMAL TOLERANCE CLASS Toleances Fo Tapee Rolle eaings Symbols (Applicable fo metic an inch seies) s = beaing boe iamete, nominal = eviation of a single boe iamete mp = single plane mean boe iamete eviation (fo a basically tapee boe mp efes only to the theoetical small en of boe) Vp = boe iamete vaiation in single aial plane Vmp = mean boe iamete vaiation ( this applies only to a basically cylinical boe ) = beaing outsie iamete, nominal 1 = oute ing flange outsie iamete, nominal S = eviation of a single outsie iamete mp = single plane mean outsie iamete eviation V P = outsie iamete vaiation in a single aial plane V mp = mean outsie iamete vaiation = inne ing with, nominal T = beaing with, nominal Ts T1 s C = eviation of the actual beaing with = effective with of inne subunit, nominal = eviation of single inne ing with = oute ing with, nominal Cs = eviation of single oute ing with K ia = aial unout of assemble beaing inne ing K ea = aial unout of assemble beaing oute ing S = inne ing efeence face (backface, whee applicable) unout with boe S = vaiation of beaing outsie suface geneatix inclination with oute ing efeence face (back face) Sia = assemble beaing inne ing face (backface) unout with aceway Sea = assemble beaing oute ing face (backface) unout with aceway T1s T2 T2s = eviation of the actual effective with of inne sub unit = effective with of oute subunit, nominal = eviation of the actual effective with of oute subunit MASTER OUTER SUUNIT T T 1 T 2 C MASTER INNER SUUNIT O O SYMOLS FOR TAPERE ROLLER EARINGS 19

28 Metic Seies (ISO 492 / IS 746) (mm) mp Vp Vmp Kia Ove Incluing High Low Max Max Max TALE INNER RING Toleance value in micons (mm) mp Vp Vmp Kea Ove Incluing High Low Max Max Max TALE OUTER RING Toleance value in micons

29 TALE WITH INNER AN OUTER RING, SINGLE ROW EARING AN SINGLE ROW SUUNITS Ove Incluing High Low High Low High Low High Low High Low mm Toleance value in micons s Cs Ts T1s T2s Table WITH EVIATIONS OF ASSEMLE OULE ROW AN FOUR ROW TAPERE ROLLER EARINGS (mm) Oveall with/height eviation of assemble ouble ows tapee olle beaings Oveall with/height eviation of assemble fou ows tapee olle beaings Ove Incluing High Low High Low

30 5.5 Toleance Fo Tapee Rolle eaings (Inch Seies) (ISO 578) TALE INNER RING ORE, INNER RING WITH AN EARING WITH Toleance s S class Ove Incluing High Low High Low (3) (4) Inch mm NOTE : The Cage may poject beyon the beaing with. Value in.1 inch Value in.1 mm High Ts Low TALE OUTER RING OUTSIE IAMETER, OUTER RING WITH AN ASSEMLE EARING RUNOUTS Toleance class S cs Kia Kea Ove Incluing High Low High Low Max Inch Value in.1 inch (12) (12) mm Value in.1 mm 4 3 (34.8) (34.8) NOTE : The Toleance fo the outsie iamete of an oute ing flange 1 is h9 (See ISO 286) Sia Sea Max TALE EFFECTIVE WITH OF SUUNIT, TOLERANCE CLASS 4 (Nomal Toleance Class) Ove Incluing High Low High 4 (11.6) T1s T2s Inch mm Value in.1 inch Value in.1 mm Low

31 5. 6 Toleance Fo Thust all an Rolle eaings (As pe ISO 199) Symbols = boe iamete of shaft washe, singleiection beaing 2 = boe iamete of shaft washe, oubleiection beaing mp 2mp mp Se Si T T 1 Ts T1s Vp V2p Vp = eviation of mean boe iamete in a single plan of shaft, singleiection beaing = eviation of mean boe iamete in a single plan of shaft, oubleiection beaing = outsie iamete of housing washe = eviation of mean outsie iamete in a single of plan of housing washe = vaiation in thickness between housing washe aceway an back face note Applies only to ball thust beaings an cylinical olle thust beaings with 9 contact angle = vaiation in thickness between shaft washe eceway an back face note Applies only to ball thust beaings an cylinical olle thust beaings with 9 contact angle = beaing height, singleiection beaing = beaing height, ouble iection beaing = eviation of the actual beaing height, singleiection beaing = eviation of the actual beaing height, oubleiection beaing = vaiation of boe iamete in a single plane of shaft washe, singleiection beaing = vaiation of boe iamete in a single plane of shaft washe, oubleiection beaing = vaiation of outsie iamete in a single aial plane of housing washe Single iection thust beaing ouble iection thust beaing 23

32 Table SHAFT WASHER AN EARING HEIGHT (AS PER ISO 199/NORMAL TOLERANCE CLASS) Toleance values in micometes an 2 > high low > mp, 2mp Vp, V2p Si max max NOTE : Fo oubleiection beaings the values apply only up to an incluing 2=19mm high Ts low high T1s low Table SHAFT WASHER AN EARING HEIGHT (AS PER ISO 199/NORMAL TOLERANCE CLASS) mm > high low > mp Vp Se max. max. NOTE : Fo oubleiection beaings the values apply only up to an incluing = 36mm Toleance values in micometes Ientical to Si of shaft washe of same beaing 24

33 5.7 Chamfe imensions Limits Fo Rolle eaings (AS PER ISO : 582 / IS:5934) Metic Seies Raial eaings an Tapee Rolle eaings Symbols Ring face = beaing boe iamete, nominal = beaing outsie iamete, nominal Ring boe o outsie Cylinical suface min. s max. s (Axial iection) min. s s max. (Raial iection) = smallest pemissible single chamfe imension (minimum s min limit) = lagest pemissible single chamfe imension (maximum limit) s max = lagest pemissible single shaft housing fillet aius as max Cicula ac (aius min) beyon s which no ing mateial may poject TALE TAPERE ROLLER EARINGS OF METRIC SERIES Cone () o Cup () back face chamfe o s min > < aial iection imensions in Millimetes s max axial iection TALE RAIAL EARINGS EXCEPT TAPERE ROLLER EARINGS imensions in Millimetes o s min > < aial iection s max axial iection

34 TALE THRUST EARINGS s min imensions in Millimetes s max aial an axial iection Compaison between nominal chamfe imension & minimum chamfe limits TALE RAIAL EARINGS EXCEPT TAPERE ROLLER EARINGS AN THRUST EARINGS nom s imensions in Millimetes min s In ISO : the s min values wee 1 an 2 mm espectively. nom TALE TAPERE ROLLER EARINGS Cup back face chamfe s min s min (ISO ) imensions in Millimetes Cup back face chamfe s min s min (ISO )

35 5.7.2 CHAMFER IMENSIONS LIMITS FOR TAPERE ROLLER EARING OF INCH SERIES AS PER ISO : 1123) Symbols Table INNER RING CHAMFER IMENSION LIMITS oe iamete nominal Ove (2) (4) (5,8) (11,8) Incl ,8 11,6 254 min. max. min. max. Values in inches R R R R +.15 R +.2 R +.25 Values in millimetes R R R Chamfe height R1 R +,38 R +,51 R +,64 R R R R R R Chamfe Weight R2 R +.35 R +.5 R +.7 R +,89 R + 1,27 R + 1,78 R R1 R2 1 2 = inne ing boe iamete = oute ing oust sie iamete = nominal imension of inne ing back face chamfe = height of inne ing back face chamfe = with of inne ing back face chamfe = nominal imension of oute ing back face chamfe = height of oute ing back face chamfe = with of oute ing back face chamfe Table OUTER RING CHAMFER IMENSION LIMITS Outsie iamete nominal Ove (4) (16.625) (1.5) (11,61) (168,275) (266,7) Incl ,6 168, ,7 355,6 min. max. min. max. Values in inches Values in millimetes Chamfe height ,7 Chamfe Weight ,7 + 1,17 + 1,35 + 1,7 The value of is ientical with that min in ISO/R 355, Pat 1. 27

36 5.8 asic Tapee oe, Tape 1:12 The nomal tape angle (half the cone angle): α = 2 23'9.4" = = a The basic iamete at the theoetical lage en of the boe : = +1/12 The toleances fo a tapee boe, tape 1 :12 compise a)a mean iamete toleance, given by limits fo the actual mean iamete eviation at the theoetical small en of the boe, mp b)a tape toleance iamete, given by limits fo the iffeence between the actual mean iamete eviations at the two ens of the boe, 1mp mp; an c)a toleance fo the iamete vaiation, Vp' given by a maximum value applying in any aial plane of the boe Nomal Toleance mp mp 1+ 1mp Theoetical tapee hole Tapee hole having imensional iffeence of the aveage boe iamete within the flat suface Unit m Table 5.6 Toleance an allowable values (Class ) of tapee hole of aial beaings (stana tappe atio 1:12) (mm) mp 1mp mp Vp Ove Incluing High Low High Low Max , 1, , 1,25 1,

37 eaing Intenal cleaance (Initial cleaance) is the amount of intenal cleaances, a beaing has befoe being installe on a shaft o on a housing as shown in figue when eithe the inne/oute ing is fix an the othe ing is fee to move. isplacement can take place eithe in axial/aial iection. This amount of isplacement (Raially o Axially) is teme by intenal cleaance, an epening on the iection, is calle the aial cleaance o the axial intenal cleaance. When the intenal cleaance of a beaing is measue, a slight measuement loa is applie to the ace ways so the intenal cleaance may be measue accuately. Howeve, at this time, a slight amount of elastic efomation of the beaing occus une the measuement loa, an the cleaance measuement value is slightly lage than the two cleaances. This iscepancy between the two beaing cleaances an the incease amount ue to elastic efomation must be compensate. These compensate values ae given in Table below TALE: 6.1 AJUSTMENT OF RAIAL INTERNAL CLEARANCE OF EEP GROOVE ALL EARINGS ASE ON MEASURE LOA 6. EARING INTERNAL CLEARANCE IMPORTANT Once ball an olle beaings ae mounte an unning, a small amount of aial intenal o unning cleaance is nomally esiable. In the case of beaings une aial loa, quiete unning is geneally obtaine when this cleaance is minimum. Raial beaings ae mae with following iffeent anges of aial intenal cleaancec2, Nomal, C3 an C4 C2 These beaings have the smallest amount of aial intenal cleaance. They shoul only be use whee feeom fom all shake is equie in the assemble beaings an thee is no possibility of the initial aial intenal cleaances being eliminate by extenal causes. Theefoe, special attention must be given to the seating imensions as the expansion of the inne ing o contaction of the oute ing may cause tight beaings. In this espect a C2 beaing shoul not be use unless ecommene by us. Nominal oe iamete (mm) ove incl Measuing Loa N (Kgf) (2.5) (5) (15) Unit µm Raial cleaance of the beaing is built up fo following easons : 1. Accommoate the euction of cleaance in a beaing ue to intefeence fo inne ing on the shaft o oute ing in the housing. 2. Accommoate the mino changes in the imensions of pats without affecting the beaing pefomance. C Raial Cleaance Incease CN C C CN : This gae of aial intenal cleaance is intene fo use whee only one ing is mae an intefeence fit, an thee is no appeciable loss of cleaance ue to tempeatue iffeence. all an olle beaings fo geneal engineeing applications ae usually of this cleaance. C3 : This gae of aial intenal cleaance shoul be use when both ings of a beaing ae mae an intefeence fit, o when only one ing is an intefeence fit but thee is likely to be some loss of cleaance ue to tempeatue iffeences. It is the gae nomally use fo aial ball beaings that take axial loaing but fo some puposes even beaings with C4 cleaance may be equie. C4 : Whee thee will be some loss of cleaance ue to tempeatue iffeences an both ings ae intefeence fit, this gae of aial intenal cleaance is employe. One example of its use is in beaings fo taction motos. Customes shoul always consult us befoe oeing beaings with this gae of aial intenal cleaance. 3. Compensate fo the iffeential expansion of the two ings when the inne ing of a beaing opeates at a highe tempeatue than the oute ing. 4. It allows a slight misalignment between the shaft an the housing, an theeby pevents the pematue failue of the beaing 5. It affects the en play of aial ball beaing, an also affects thei capacity fo caying axial loas, the geate the aial cleaance the geate the capacity fo suppoting axial loa. Raial Cleaance = Axial Cleaance = 29

38 6.1 Intenal Cleaance Selection The intenal cleaance of a beaing une opeating conitions (effective cleaance) is usually smalle than the same beaing's initial cleaance befoe being installe an opeate. This is ue to seveal factos incluing beaing fit, the iffeence in tempeatue between the inne an oute ings, etc. As a beaing's opeating cleaance has an effect on beaing life, heat geneation, vibation, noise, etc. ; cae must be execise in selecting the most suitable opeating cleaance. Effective intenal cleaance : The intenal cleaance iffeential between the initia! cleaance an the opeating (effective) cleaance (the amount of cleaance euction cause by intefeence fits, o cleaance vaiation ue to the tempeatue iffeence between the inne an oute ings) can be calculate by the following fomula : eff = ( f+ t) Reuce intenal cleaance ue to inne/oute ing tempeatue iffeence : uing opeation, nomally the oute ing will be fom 5 to 1 C coole than the inne ing o otating pats. Howeve, if the cooling effect of the housing is lage, the shaft is connecte to a heat souce, o a heate substance is conucte though the hollow shaft, the tempeatue iffeence between the two ings can be even geate. The amount of intenal cleaance is thus futhe euce by the iffeential expansion of the two ings. t =. T.o whee, t=amount of euce cleaance ue to heat iffeential α =eaing steel linea expansion coefficient 12.5 x 1 / C T=Inne/oute ing tempeatue iffeential ( C) o=oute ing aceway iamete (mm) Oute ing aceway iamete,. Value can be calculate by using fomula as given below: Fo ball beaings an spheical olle beaings 6 whee, eff o f t = Effective intenal cleaance( mm) = eaing intenal cleaance (mm) = Reuce amount of cleaance ue to intefeence (mm) = Reuce amount of cleaance ue to tempeatue iffeential of inne an oute ings( mm) o=.2 ( +4) Fo olle beaings (except selfaligning) o=.25 ( + 3) whee, = eaing boe iamete (mm) = eaing outsie iamete (mm) Reuce intenal cleaance ue to intefeence : When beaings ae installe with intefeence fits on shafts an in housings, the inne ing will expan an the oute ing will contact ; thus eucing the beaing's intenal cleaance. The amount of expansion o contaction vaies epening on the shape of the beaing, the shape of the shaft o housing, imensions of the espective pats, an the type of mateials use. The iffeential can ange fom appoximately 7% to 9% of the effective intefeence. f eff = (.7~.9) whee, f = Reuce amount of cleaance ue to intefeence (mm) eff = Effective intefeence (mm) 3

39 Ove Incl. Min. Max. oe iamete (mm) Goup 2 (C2) Min. Max. Goup N (CN) Min. Max. Goup 3 (C3) Min. Max. Goup 4 (C4) Min. Max. Goup 5 (C5) TALE 6.2 RAIAL INTERNAL CLEARANCE FOR EEP GROOVE ALL EARINGS WITH CYLINRICAL ORE Cleaance value in micons eep goove ball beaings 6.2 Raial Intenal Cleaance values as pe ISO : 5753/IS:

40 6.2.2 Cylinical Rolle eaings TALE 6.3 RAIAL INTERNAL CLEARANCE OF CYLINRICAL ROLLER EARINGS (INTERCHANGEALE) WITH CYLINRICAL ORE Ove Incl. Min. Max. oe iamete (mm) Goup 2 (C2) Min. Max. Goup N (CN) Min. Max. Goup 3 (C3) Min. Max. Goup 4 (C4) Min. Max. Goup 5 (C5) Cleaance value in micons 32

41 TALE 6.4 RAIAL INTERNAL CLEARANCE OF CYLINRICAL ROLLER EARINGS (NONINTERCHANGEALE) WITH CYLINRICAL ORE Nominal oe iamete (mm) Ove Incl. Min Max. Min Max. Min Max. Min Max. Min Cleaance value in micons C1NA C2NA NA C3NA C4NA C5NA Max. Min Max Fo beaings with nomal cleaance, only NA is ae to beaing numbes, Ex. NU35NA 33

42 TALE 6.5 RAIAL INTERNAL CLEARANCE OF CYLINRICAL ROLLER EARINGS (NONINTERCHANGEALE) with cylinical boe Nominal oe iamete (mm) Ove Incl Cleaance value in micons C9NA CONA C1NA C2NA NA C3NA Min Max. Min Max. Min Max. Min Max. Min Max. Min Max C9NA, CNA an C1NA ae applie only to pecision beaings of Class 5 an highe. 34

43 6.2.3 ouble ow selfaligning ball beaing TALE 6.6 OULE ROW SELF ALIGNING ALL EARINGS WITH CYLINRICAL ORE Cleaance value in micons oe iamete (mm) Goup 2 (C2) Goup N (CN) Goup 3 (C3) Goup 4 (C4) Goup 5 (C5) Ove Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max TALE 6. 7 OULE ROW SELF ALIGNING ALL EARINGS WITH TAPERE ORE Cleaance value in micons oe iamete (mm) Goup 2 (C2) Goup N (CN) Goup 3 (C3) Goup 4 (C4) Goup 5 (C5) Ove Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max

44 oe iamete (mm) Goup 2 (C2) Goup N (CN) Goup 3 (C3) Goup 4 (C4) Goup 5 (C5) Ove Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max Cleaance value in micons TALE 6. OULE ROW SPHERICAL ROLLER EARINGS WITH CYLINRICAL ORE ouble ow selfaligning olle beaing 36

45 Cleaance value in micons TALE 6. OULE ROW SPHERICAL ROLLER EARINGS WITH TAPERE ORE 9 oe iamete (mm) Goup 2 (C2) Goup N (CN) Goup 3 (C3) Goup 4 (C4) Goup 5 (C5) Ove Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max

46 7. LURICATION 38 Why eaing Shoul be lubicate? Lubication is an essential equiement fo the pope opeation of beaings. The pupose of beaing lubication is to pevent iect metallic contact between the vaious olling an sliing elements. This is accomplishe though the fomation of a thin film of oil/gease on the contact sufaces. The Avantages of lubication Potects the beaing fom ust & coosion. Potects the beaing fom the foeign paticles. Minimizes the fiction between the aces & olling elements. Reuces the fiction aising out of elastic efomation of olling elements when une loa. Facilitates the smooth unning of beaing by minimizing noise. issipates the heat fom the beaing an helps to istibute the fictional heat unifomly thoughout the beaing, which gets geneate uing opeation. Saves powe losses by minimizing intenal fiction. Helps the beaing to attain the equie spee. Helps to attain the anticipate life of the beaing. Selection of lubicant: Small size beaings opeating at high spee, low viscosity oil is use Lage beaing caying heavy loa, lubicants with highe viscosity an aitional aitive popeties may be use. The lubicant must have sufficient lubicating capacity at the pevailing tempeatue It must fom a loa sustaining lubicating film fo pevailing loa conitions. It must have the capacity to absob wate to a cetain extent, without affecting the lubicating capacity wheeve the application emans. When the Lubicant quality an quantity is inaequate, it esults in the cage failue, inaequate lubication may heat up cage an may beak own the ball pockets. ue to beak own of the lubicating films on aceways an olling element sufaces it may evelop scoing maks, which lea to pematue failue of the beaing. This conition may also esult In the efomation of pats an when the beaing efome pats otate une loa, sliing motion will take place instea of olling motion an it ens up in pematue beaing failue. Table 7.1 Lubication methos an chaacteistics Metho Hanling Reliability Cooling Effect Seal Stuctue Powe loss Envionment Contamination High spee otation Gease Lubication o x o o : Vey Goo o : Goo : Fai x : Poo o x Oil Lubication o o o 7.1 Types of Lubication Gease Lubication Gease type lubicants ae elatively easy to hanle & equie only the simplest sealing evices an it also involves a minimum of esign an maintenance equiements an thus offes an optimum economy. Fo these easons, gease is most wiely use lubicant fo olling beaings. Gease is a semisoli lubicant consisting of base oil, thickene an aitives A. ase Oil : Mineal oils o synthetic oils such as silicon ieste oils an fluoocabon oils ae mainly use as the base oil fo gease. The lubicating popeties of gease epen mainly on chaacteistics of its base oil. Theefoe geases with low viscosity base oil ae best suite fo low tempeatue an high spees. High viscosity base oils ae best suite fo heavy loas.. Thickening Agents : Thickening agents ae compoune with the base oils to maintain the semisoli state of the gease. Thee ae seveal types of metallic soaps such as lithium, soium & calcium an inoganic thickenes such as silica gel & bentonite an heat esisting oganic thickenes such as polyuea an fluoic compouns. The vaious special chaacteistics of a gease, such as limiting tempeatue ange, mechanical stability, wate esistance, etc. epen lagely on the type of thickening agent use. Fo example, a soium base gease is geneally poo in wate esistance an lithium base geases ae wate epellent within the cetain limits an may also be use in the case of moistue if coosion inhibitos ae ae. Geases with betone, polyuea an othe nonmetallic soaps as the thickening agent ae geneally supeio in high tempeatue popeties. C. Aitives : Vaious aitives ae ae to gease such as antioxiants, coosion inhibitos an exteme pessue aitives (EP Aitives ) to impove vaious popeties. EP aitives ae use in heavy loa applications. Fo long use without eplenishment, an antioxiant shoul be ae.. Consistency: Consistency inicate the stiffness an liquiity an expesse by a numeical inex. Geases ae ivie into vaious consistency classes accoing to the NLGI (National Lubicating gease Institute Scale). The NLGI values fo this inex inicate the elative softness of the gease, the lage the numbe the stiffe the gease. It is mainly etemine by the amount of thickening agent use an the viscosity of the base oil. Fo olling beaing lubication gease with the NLGI numbes of 1,2, & 3 ae use.

47 TALE 7.2 RELATIONSHIP ETWEEN CONSISTENCY AN APPLICATION OF GREASE NLGI Consistency No Woke Penetation 355~385 31~34 265~295 22~25 175~25 Woking conitions Fo centalise geasing use When fetting is likely to occu Fo centalise geasing use When fetting is likely to occu Fo low tempeatue Fo geneal use Fo selecte ball beaings Fo high tempeatue Fo geneal use Fo selecte ball beaings Fo high tempeatue Fo special use TALE 7.3 CRITERIA FOR SUITALE GREASE SELECTION Woking conition Fo smooth unning (Low noise level) Vetical Mounting If oute ing otation o centifugal foce on beaing High Tempeatue Low Tempeatue Contaminate Envionment Fo futhe etail you may contact ou Technical Cell Suitable Gease Gease of penetation class 2 Gease with goo ahesion popeties of classes 3 & 4 Gease having aitional quantity of thickene of class 2 to 4 Gease with Synthetic base oil an class of 3 & 4 Low viscosity gease with suitable oil of class 1 & 2. Gease of class 3 E. Mixing iffeent Types of gease In geneal, iffeent bans an iffeent kins of gease must not be mixe because of the iffeent aitives they contain. Mixing gease with iffeent types of thickenes may impai its composition an physical popeties. Howeve, if iffeent geases must be mixe, at least geases with the same base oil an thickening agent shoul be selecte. ut even when the gease of the same base oil an thickening agent ae mixe, the quality of the gease may still change ue to iffeence in thei aitives. Amount of Gease The amount of gease use in any given situation will epen on the following factos : (1) Size & Shape of housing, (2) Space limitation, (3) eaing's spee, (4) Opeating Loa, (5) Type of gease (6) Opeating Conitions As a geneal ule housing & beaing shoul be only fille with 3% to 6% of thei capacities. Whee spees ae high an tempeatue ise, nees to be kept to a minimum, euce amount of gease shoul be use. Excessive amount of gease causes tempeatue ise which in tun causes the gease to soften an may allow leakage. If excessive gease is use, oxiation an eteioation may cause lowe lubicating efficiency. Moeove the stana beaing space can be foun by following fomula, V = K. W. Whee V : 3 Quantity of beaing space open type (Cm ) K : eaing Space Facto W : Mass of eaing in Kg. (Specific gavity of gease =.9) 39

48 4 TALE 7.4 EARING SPACE RATIO (K) eaing Type all eaings NUcylinical Rolle eaings 2 Ncylinical Rolle eaings 3 Tapee Rolle eaings Spheical Rolle eaings 1 Retaine Type Pesse Retaine 61 Pesse Retaine Machine Retaine Pesse Retaine Machine Retaine Machine Retaine Pesse Retaine Machine Retaine 1 Remove 16 Seies 2 Remove NU4 Seies 3 Remove N4 Seies In geneal, the pemissible woking tempeatue is limite by the egee of mechanical agitation to which the gease is subjecte, an we shall be please to ecommen suitable lubicants fo vaying conitions on eceipt of necessay paticulas efoe the beaings ae set to wok, they shoul be thooughly chage with gease in such a manne as to ensue the efficient coating of all woking sufaces. The housing shoul also be lightly packe with gease, it being impotant that a eseve supply of lubicant shoul be maintaine in actual contact with the beaing to pomote satisfactoy an continuous lubication. Ove filling o camming shoul, howeve, be avoie, fo excessive geasing may cause oveheating ue to chuning, an if two beaings ae mounte in the same housing, they, fo this eason, shoul be sepaate by istance pieces. If coectly applie, one chage of gease will last fo a vey long peio, vaying with the conition of woking. Gease Relubication Gease eplenishment o exchange is equie if the gease sevice life is shote than the anticipate beaing life. The beaings ae elubicate by means of gease guns though lubicating nipples. If fequent elubication is equie, gease pumps an volumetic meteing units must be use. It is essential that the fesh gease isplace the spent gease, so that the gease get exchange, but ovegeasing is pevente. Gease Relubication Quantities Relubication quantity L 1 fo weekly to yealy elubicating L1 =..X (in gams) = Oute ia of the beaing (mm) = With of the beaing (mm) X Weekly :.2 Fotnightly :.25 Monthly :.3 Yealy :.4.5 Gease eplenishment intevals can also be calculate by using following gaph. This chat inicates the eplenishment inteval fo stana olling beaing gease when use une nomal opeating conitions. As opeating tempeatue inceases, the gease esupply inteval shoul be shotene accoingly. Geneally, fo evey 1 C incease in beaing tempeatue, K above 8 C, the lubication peio is euce by exponent "1/1.5" Raial ball beaings C/P Fig : Value of ajustment facto F L epens on beaing Thust ball beaings eaing boe mm Cylinical olle beaings Selfaligning olle beaings Tapee olle beaings A n : Opeating otational spee Example : Fin the gease lubication inteval fo ball beaing 625 with a aial loa 1.4 kn opeating at 48 /min C/P = 14/1.4 kn = 1 fom fig. 2 ajuste loa fl is.98 Fom the beaing tables the allowable spee fo beaing 625 is 13 /min & numbes of evolutions at a aial loa of 1.4 kn ae n o =.98x13 = 1274 /min Gease eplacement limit h III no/n II theefoe n/n o = 1274/48 = 2.6 Using the chat in fig.3 locate the point coesponing to boe iamete =25 mm on the vetical line fo aial ball beaings. aw a staight hoizontal line to vetical line I. Afte that aw a staightline fom that point (A in example) to a point on the line II which coespons to the n o/n value (2.6 in example). Point C, whee this line intesects vetical line inicates the lubication inteval 'h' which is appoximately 45 hous. C no : flxallowable otational spee (imensions table)

49 TALE 7.5 GREASE VARIETIES AN CHARACTERISTICS : CHARACTERISTICS Thickene Lithium gease Lithium Soap GREASE NAME Calcium gease (cup gease) Calcium Soap Soium gease (fibe gease) Soium Soap ase Oil Mineal oil Synthetic oil (ieste oil) Synthetic oil (Silicon oil) Mineal oil Mineal oil opping point ( c) 17 to to to 26 8 to 1 16 to 18 Opeating temp. Range ( c) 3 to to to to +7 to +11 Rotational ange Meium to high High Low to meium Low to meium Low to high Mechanical stability Excellent Goo to excellent Goo Fai to goo Goo to excellent Wate esistance Goo Goo Goo Goo a Pessue esistance Goo Fai a to fai Fai Goo to excellent Supeio Low, Remaks Most wiely usable fo vaious olling beaings Tempeatue & fiction chaacteistics. Suitable fo beaings fo measuing instuments & exta small ball beaings fo small electic motos. Supeio, High & low tempeatue chaacteistics. Suitable fo application at Low otation spee & une light loa. Not applicable at high tempeatue Liable to emulsify in the pesence of wate. Use at elatively high tempeatue. GREASE NAME CHARACTERISTICS Complex ase Gease Non Soap ase Gease Thickene Lithium Complex Soap Calcium Complex Soap entone Uea Compouns Fluoine Compuns ase Oil Mineal Oil Mineal Oil Mineal Oil Mineal Oil/Synthetic Oil Synthetic Oil opping point ( c) 25 o Highe 2 to o highe 25 o Highe Opeating temp. Range ( c) 3 to to to to to +25 Rotational ange Low to High Low to Meium Meium to High Low to High Low to Meium Mechanical stability Goo to Excellent Goo Goo Goo to Excellent Goo Wate esistance Goo to Excellent Goo Goo Goo to Excellent Goo Pessue esistance Goo Goo Goo Goo to Excellent Goo Remaks Supeio mechanical stability an heat esistance. Use at elatively high tempeatue. Supeio pessue esistance when exteme pessue agents is ae. Use In beaings fo olling mills. Suitable fo application at high tempeatue & une elatively heavy loa Supeio wate esistance, oxiation stability, an heat stability. Suitable fo application at high tempeatue & high otation spee. Supeio chemical esistance an solvent esistance. Usable upto 25 C. 41

50 7.1.2 OIL LURICATION : Oil lubication is consiee to be moe effective than gease, povie pope sealing methos ae employe to pevent the leakage. Only highly efine oil shoul be use as beaing lubicant. TYPES OF OILS Natual oil Synthetic oil a) iestes b) Silicon oil c) Fluoinate oil ) Polyglycols e) Synthetic hyocabons Animal & Vegetable oils OIL IS PREFERRE WHERE eaing spee is high Opeating tempeatue is consieably high it conitions ae minimum Sealing methos can be easily employe TALE 7.6 CHARACTERISTICS OF LURICATING OILS TYPE OF LURICATING OIL Opeating Temp. ange (C ) HIGHLY REFINE MINERAL OIL MAJOR SYNTHETIC OILS IESTER OIL SILICON OIL POLYGLYCOLIC OIL POLYPHENYL ETHER OIL FLOURINATE OIL 4 to to to to +15 to to +3 Lubicity Excellent Excellent Fai Goo Goo Excellent Oxiation stability Raioactivity esistance Goo Goo Fai Fai Excellent Excellent a a a to Fai a Excellent Suitability fo High Loas Vey Goo Goo Poo Vey Goo Vey Goo Goo With ega to opeating tempeatue & lubication, the following table lists the equie oil visocisty fo iffeent types of olling beaings. eaing Type all beaings, Cylinical olle beaings, Neele olle beaings Spheical olle beaings, Tapee olle beaings, Neele olle thust beaing SelfAligning olle thust beaings ynamic Viscosity (mm²/s) Remaks : 1mm²/s = 1 cst (Centistokes) Amount of oil : When oil bath lubication is use an a beaing mounte with its axis hoizontal, oil shoul be ae until the static oil level is at the cente of the lowest beaing olling element. Fo vetical shaft, a oil to cove 5% to 8% of the olling element. 42

51 7.2 Methos of Oil Lubication Oil bath lubication This metho of lubication is one of the most popula fo slow an intemeiate spee opeation. This is efee to as "oil bath lubication", because the beaing opeates in an oil bath mae by filling the housing with oil. Too much oil causes excessive tempeatue ise (though agitation) while too little oil may cause seizing. To assue pope lubication it is sufficient that the oil level be kept aoun the cente of bottom balls/ olles of beaing in stationay conition. In the case of hoizontal shaft, this level is etemine when the beaing is ile. It is esiable to install an oil gauge so that the oil level can easily be checke when the beaing is ile. In the case of a vetical shaft, 58% of the ball / olle shoul be submege when the beaing is ile. When moe than two beaings ae connecte to a hosing, the beaing unning at the bottom will geneate heat unless it otates at extemely low spee. Fo such cases, we ecommen the use of some othe lubication metho Splash lubication This is a lubication metho whee, without iect submesion, oil is splashe by impelles attache to a shaft. This metho is effective fo faily high spees. One example, whee splash lubication is commonly use fo beaings an geas is in a gea box whee the geas may also be the splashing evices. In this case howeve, a shiel plate shoul be installe o a magnet shoul be place at the bottom of both to pevent won ginings fom the geas fom possibly enteing the beaings. Use of a conical otating element in lieu of an impelle on a vetical shaft is effective in splashing oil, supplie by centifugal foce. 43

52 7.2.3 opfee lubication This is a lubication metho whee an oil pot o oil esevoi (usually calle an "oile") is installe at the uppe potion of housing an oil ips fom the oile though a tiny hole of fom a wick (though capillay action). The ipping oil is convete to fog o mist on collisions with the otating shaft / beaing pats. This metho is moe effective fo compaatively high spees an light loas athe than meium loas. Although application capability is geat iespective of shaft mounting (vetical o hoizontal) emembe to top off the oile befoe it uns y Ciculating lubication l Use fo beaing cooling applications o fo automatic oil supply systems in which the oil supply is centally locate. l One of the avantages of this metho is that oil cooling evices an filtes to maintain oil puity can be installe within the system. l In oe fo oil to thoughly lubicate the beaing, oil inlets an outlets must be povie on opposite sies of the beaing. 44

53 7.2.5 isc Lubication l In this metho, a patially submege isc otates an pulls oil up into a esevoi fom which it then ains own though the beaing, lubicating it Spay lubication (oilmist lubication) Filtee oil is blown though a lubication spaye (using y compesse ai), emeging in an atomize fom an is fe into the housing fo lubication. This lubication metho is calle "spay lubication" o "oilmist lubication", which featues low esistance of oil, high effectiveness of cooling an pevention of beaings fom ust o wate invasion ue to high intenal pessue associate with new oil feeing at all times. This metho has often been use fo beaings with compaatively light loas such as high spee main spinle beaings o gining machines though it ecently has become popula fo beaings mounte on metal olling mills. In cases of metal olling mills, oil atomizing by heating high viscosity oil causes the beaing to aise its tempeatue. Theefoe, cae shoul be taken when selecting the beaing cleaance. ecause of continuous clean beaing opeation an less isk of oil leakage, use of this lubication metho is expaning. N F=Filte R=Pessue egulato L=atomize N=nozzle F R L Oil Jet lubication l This metho lubicates by injecting oil une high pessue iectly into the sie of the beaing. This is a eliable system fo high spee, high tempeatue o othewise sevee conitions. l Use fo lubicating the beaings in jet engines, gas tubines an othe high spee equipment. l Uneace lubication fo machine tools is one example of this type of lubication 45

54 8.1 Seatings Seatings fo beaing ings must be paallel, cicula an machine to thei coect limits. aly mae seatings can istot thin section beaing ings, an thus euce the efficiency an life of the beaings. Shafts must be esigne so that whee igi beaings ae use, the slope at the beaings ue to eflection is as small as possible. The pemissible slope must vay with iniviual applications as it epens upon the opeating conitions consequently limiting values ae not liste. When expeience is lacking on this point, ou Technical epatment will be please to give avice. 8. SEATINGS, LIMITS AN FITS Ceep is slow otation of one ing elative to its seating. It is unesiable since the shaft an the boe of the beaing o the housing an the outsie iamete of the beaing become won. Ceep is not ue to fiction within a beaing but is geneally cause by aial loas otating o oscillating with espect to a fixe point on the ing une consieation. The only satisfactoy way of peventing ceep une such conitions is to make the affecte ing an intefeence fit on its seating. Setscews o key ways shoul not be use in an effot to pevent ceep, fo they quickly wea ue to constant chafing, o can istot beaing ings, causing local oveloa an api beaing failue. Also, clamping a ing enways oes not nomally pevent ceep. 46 Housing must give aequate suppot to the oute ing of a beaing une loa. If a housing istots excessively, the oute ing will invaiably istot as well, causing pematue failue of the beaing. Whee iniviual housing is use accuate alignment must be povie fo igi beaings. Split housing shoul not be use unless absolutely necessay, since the joint between the cap an its base coul istot the oute ing. If such housings ae use, the two halves shoul be accuately owele o egistee befoe the beaing seating is machine. It is avisable to ensue that the cap can only be fitte one way oun by suitably aanging the owels o egiste. Light alloy housings shoul be povie with substantial steel lines when : A beaing has to wok une wie vaiation of tempeatue, as iffeential expansion between the seating an beaing mateials affects the initial fit between these membes. Heavy an/o shock loas ae involve, fo alloy seatings can quickly loose shape une such loaing an give ise to seious touble. The steel lines must be an intefeence fit in thei housings at the tempeatue extemes anticipate, an beating seatings shoul be machine afte the lines ae fitte. When light alloy o othe non feous seating ae to be use, we avise consultation with ou Technical epatment about the seating limits to be aopte. Seating Fits It is vey impotant that beaing seatings be machine to thei coect limits, incoect fits can cause tightness within the beaing o allow one o both of the beaing ings to ceep, an affect the unning accuacy an the assembly an isassembly of a machine. all Jounal, Rolle Jounal, Angula Contact an uplex eaings Rotating Rings (usually inne ing) shoul be mae intefeence fit on thei seating to ensue that they will not ceep. Stationay Rings (usually oute ing) nee not be intefeence fit povie thee ae no outofbalance o oscillating loas. Some beaing ings must slie enways on thei seatings an in such cases a sliing fit is essential, although excessive slackness shoul be avoie. Fo example, whee two o moe all Jounal beaings, o Rolle Jounal beaings with non etachable ings ae mounte on the same unit, the unlocate ing o ings shoul be fee to move enways, othewise the beaings that ae ajuste enwise shoul also be mae sliing fits. Whee the stationay ing of all Jounal, Angula Contact o uplex eaing is hel enways, it is common pactice to make the ing a sliing fit. In the case of Rolle Jounal beaings a tansition fit is nomally use. Fo Jounal beaings light intefeence fits, howeve, ae not etimental povie the coect iametal cleaance is use, an the seating fit aopte may well be govene by consieations of mounting, ismounting, an of igiity. If a stationay ing oes ceep, outofbalance loaing o outof squae mounting of one of the beaing ings must be suspecte. Mounting eos shoul be coecte, an whee outofbalance loaing exists the assembly shoul be ynamically balance, static balancing not being enough. Whee outof balance loaing can't be euce to a low level, o whee it is a function of the machine, an intefeence fit must be use on the stationay ing as well as on the otating ing. In a beaing aangement whee intefeence fits ae use on all ings, a beaing layout must be use in which thee is no ange of the beaings being axially nippe one against the othe.

55 8.2 Fits The necessity of a pope fit In some cases impope fit may lea to amage an shoten beaing life. Theefoe, it is necessay to make a caeful analysis while selecting a pope fit. Some of the negative conitions cause by impope fit ae liste below : Raceway cacking, ealy pitting an isplacement of aceways Raceway & shaft o housing abasion cause by ceeping in fetting coosion Seizing cause by loss of intenal cleaance Incease noise & lowee otational accuacy ue to aceway goove efomation. Selection of fits Selection of pope fit epene upon thoough analysis of beaing opeating conitions, incluing consieation of following factos : (1) Conition of Rotation Conition of otation efe to the moving of beaing ing being consiee in elation to the iection of loa. Thee ae 3 iffeent conitions : Rotating loa Stationey loa iection of loa ineteminate (2) Magnitue of the loa The intefeence fit of a beaing's Inne ing on its seating will be loosene with the inceasing loa, as the ing will expan une the influence of otating loa, & ing may begin to ceep. So, if it is of shock chaacte, geate intefeence is equie. The loss of intefeence ue to inceasing loa can be estimate using the following equation : When F is.3c o Whee p = Intefeence ecease of F inne ing( m) p =.8 = eaing oe (mm) When F is.3 C o = Inne Ring With(mm) F = Raial Loa (N) p =.2 F C o ( = asic Static Loa (N) ) (3) eaing Intenal Cleaance An intefeence fit of a beaing on the shaft o in housing means that ing is elastically efome (expane o compesse), an beaing's intenal cleaance euce. The intenal cleaance an pemissible euction epen on the type an size of the beaing. The euction in cleaance ue to intefeence fit can be so lage that beaings with an intenal cleaance which is geate than nomal have to be use. The expansion of the inne ing an contaction of oute ing can be assume to be appoximately 6 8 % of the intefeence, epening on the mateial of shaft an housing. (4) Tempeatue Conition Intefeence between inne ing & steel shaft is euce as a esult of tempeatue incease ( iffeence between beaing tempeatue an ambient tempeatue). This can esult in an easing of fit of the inne ing on its seating. while oute ing expansion may esult in incease in cleaance. The ecease of the intefeence of the inne ing ue to this tempeatue iffeence may be calculate using following equation : t =.15 T Whee t = Requie effective intefeence fo tempeatue iffeence m T = Tempeatue iffeence between beaing tempeatue an ambient tempeatue c. = eaing boe iamete mm. (5) Running Accuacy Requiement To euce esilience an vibation, cleaance fit shoul geneally not be use fo beaings, whee high emans ae place on unning accuacy. (6) esign & Mateial of Shaft & Housing The fit of a beaing ing on its seating must not lea to uneven istotion of the ing (out of ounness). This can be cause by iscontinuity in the housing suface. Split housings ae theefoe not suitable whee oute ings ae to have an intefeence fit. (7) Ease of Mounting & ismounting eaings with cleaance fit ae usually easie to mount o ismount than those having intefeence fit. Whee opeating conition necessitate intefeence fit an it is essential that mounting & ismounting can be one easily, sepaable beaings o beaings with tape boe an aapto o withawal sleeve may be use. (8) isplacement of NonLocating eaings If nonsepaable beaings ae use as floating beaings, it is impeative that one of the beaing ings has to move axially uing opeation. This is ensue by aopting a cleaance fit fo that ing, which caies a stationay loa, when the oute ing is une stationay loa, so that axial isplacement has to take place in the housing boe, a haene intemeiate bushing is often fitte to the oute ing. (9) Effective Intefeence an finish of shaft & housing Since the oughness of the fitte suface is euce uing fitting, the effective intefeence becomes less than the appaent intefeence. the amount of this intefeence ecease vaies epening on oughness of the sufaces. 47

56 Nomally, manufactues assume the following intefeence euctions : Fo goun shaft : 1 Micon to 2.5 Micon Machine Shaft : 5 Micon to 7 Micon (1) Fitting Stess & Ring Expansion an Contaction While calculating the minimum equie amount of intefeence, following factos shoul be taken into consieation : Intefeence is euce by aial loa Intefeence is euce by iffeence between beaing tempeatue an ambient tempeatue Intefeence is euce by vaiation of fitte sufaces To avoi sheaing of aluminium an magnesium housing uing beaing installation, steel insets shoul be use ; altenatively special lubicants may be use fo feezing an heating to facilitate assembly. A minimum intefeence fit of.15" an.1" pe inch of iamete is equie fo magnesium an aluminium housing espectively. Whee beaings ae to be pesse onto a hollow shaft, allowance must be mae fo contaction of the hollow shaft in oe to maintain the esie aial pessue. THE NEI PROUCT ENGINEERING EPARTMENT SHOUL E CONSULTE FOR PROPER FITTING PRACTICE ON ALL SPECIAL APPLICATIONS. Impotant etails on Fits Maximum intefeence shoul not excee the atio of 1 : 1 of shaft o outsie iamete. Tight intefeence fits ae ecommene fo : (a) Opeating conitions with lage vibations o shock loas (b) Application using hollow shaft of housing with thin walls (c) Application using housing mae of light alloys o plastic. Loose intefeences ae ecommene fo : (a) Application equiing high unning accuacy (b) Application using small size beaings o thin walle beaings. Shaft an housing mateial, geomety, haness an suface finish must be caefully contolle. Goun shafts shoul be finishe to 1.3 micon Ra o bette ; fo tune shafts, a finish of 2.5 micon Ra o bette ; an housing boes shoul be finishe to 4 micon Ra o bette. 48

57 Numeic value table of fitting fo aial beaing of class (Nomal class) fo metic size Nominal boe iamete of beaing (mm) mp TALE 8.1 FITTING AGAINST SHAFT g 5 g 6 h 5 h 6 j 5 js 5 j 6 Unit m Ove Incl. high low T 9L 4T 12L 8T 5L 8T 8L 11T 2L 1.5T 2.5L 14T 2L T 11L 3T 14L 8T 9L 8T 9L 12T 2L 11T 3L 15T 2L T 14L 2T 17L 8T 8L 8T 11L 13T 3L 12T 4L 16T 3L T 16L 3T 2L 1T 9L 1T 13L 15T 4L 14.5T 4.5L 19T 4L T 2L 3T 25L 12T 11L 12T 16L 18T 5L 17.5T 5.5L 23T 5L T 23L 5T 29L 15T 13L 15T 19L 21 7L 21.5T 6.5L 27T 7L T 27L 8T 34L 2T 15L 2T 22L 26T 9L 27.5T 7.5L 33T 9L T 32L 11T 39L 25T 18L 25T 25L 32T 11L 34T 9L 39T 11L T 35L 15T 44L 3T 2L 3T 29L 37T 13L 4T 1L 46T 13L T 4L 18T 49L 35T 23L 35T 32L 42T 16L 46.5T11.5L 51T 16L T 43L 22T 54L 4T 25L 4T 36L 47T 18L 52.5T 12.5L 58T 18L T 47L 25T 6L 45T 27L 45T 4L 52T 2L 58.5T13.5L 65T 2L TALE 8.2 FITTING AGAINST HOUSING Unit m Nominal outsie iamete of beaing (mm) Ove Incl mp high low G 7 G 6 H 7 J 6 J 7 Js 7 K 6 5L 28L 6L 32L 7L 37L 22L 3L 5T 17L 9T 21L 1.5T 19.5L 11T 11L 9L 45L 1L 53L 12L 62L 14L 72L 14L 79L 15L 91L 59L 76L 7T 52L 16T 6L 23T 53L 24T 35L 17L 14 17L 23L 4T 13L 7T 16L L 7T 1L 19L 26L 5T 14L 8T 18L 9T 17L 9T 1L 27L 32L 37L 43L 5L 36L 47L 5L 58L 65L 6T 21L 6T 26L 6T 31L 7T 36L 7T 43L 11T 25L 12T 31L 13T 37L 14T 44L 14T 51L 12.5T 23.5L 15T 28L 17.5T 32.5L 2T 38L 2T 45L 13T 14L 15T 17L 18T 19L 21T 22L 21T 29L 67L 87L 7T 6L 16T 71L 26T 61L 27T 4L 18L 115L 76L 97L 7T 69L 18T 79L 28.5T 68.5L 29T 47L 2L 128L 85L 18L 7T 78L 2T 88L 31.5T 76.5L 32T 53L 49

58 Numeic value table of fitting fo aial beaing of class (Nomal class) fo metic size Nominal boe iamete of beaing (mm) mp TALE 8.3 FITTING AGAINST SHAFT js 6 k 5 k 6 m 5 m 6 n 6 p 6 6 Unit m Ove Incl. high low T 4L 12.5T 4.5L 13.5T 5.5L 16.5T 6.5L 2T 8L 24.5T 9.5L 31T 11L 37.5T12.5L 44.5T14.5L 51T 16L 58T 18L 65T 2T 14T 15T 17T 21T 25T 3T 38T 46T 54T 62T 69T 77T 1T 1T 1T 2T 2T 2T 3T 3T 4T 4T 4T 5T 17T 18T 2T 25T 3T 36T 45T 53T 63T 71T 8T 9T 1T 1T 1T 2T 2T 2T 3T 3T 4T 4T 4T 4T 17T 2T 23T 27T 32T 39T 48T 58T 67T 78T 86T 95T 4T 6T 7T 8T 9T 11T 13T 15T 17T 2T 21T 23T 2T 23T 26T 31T 37T 45T 55T 65T 76T 87T 97T 4T 6T 7T 8T 9T 11T 13T 15T 17T 2T 21T 18T 23T 24T 27T 31T 38T 45T 54T 65T 77T 9T 113T 8T 1T 12T 15T 17T 2T 23T 27T 31T 11T 34T 37T 125T 4T 28T 32T 37T 45T 54T 66T 79T 93T 12T 15T 18T 22T 26T 32T 37T 43T 19T 5T 123T 56T 138T 62T 153T 68T 113T 115T 118T 136T 139T 143T 161T 165T 184T 19T 211T 217T 63T 65T 68T 77T 8T 84T 94T 98T 18T 114T 126T 132T TALE 8.4 FITTING AGAINST HOUSING Unit m Nominal outsie iamete of beaing (mm) mp K 7 M 7 N 7 P 7 Ove Incl. high low T 12T 15T 18T 21T 25T 28T 28T 33T 36T 4T 45T 13L 14L 15L 18L 22L 25L 3L 37L 43L 51L 57L 63L 15T 18T 21T 25T 3T 35T 4T 4T 46T 52T 57T 63T 8L 8L 9L 11L 13L 15L 18L 25L 3L 35L 4L 45L 19T 23T 28T 33T 39T 45T 52T 52T 6T 66T 73T 8T 4L 3L 2L 3L 4L 5L 6L 13L 16L 21L 24L 28L 24T 29T 35T 42T 52T 59T 68T 68T 79T 88T 98T 18T 1L 3L 5L 6L 8L 9L 1L 3L 3L 1L 1L 5

59 8.3 Limits an Fits Guieline TAPERE ROLLER EARINGS AFMA RECOMMENE FITTING PRACTICE Shaft an housing mateial, geomety, haness an suface finish must be caefully contolle. Goun shafts shoul be finishe to 1.3 micon A.A. o bette ; fo tune shafts a finish of 2.5 m A.A. o bette ; an housing boes shoul be finishe to 4 micon A.A. o bette. To avoi sheaing aluminium an magnesium housing uing beaing installation, steel insets shoul be use ; altenatively special lubicants may be use fo feezing an heating to facilitate assembly. A minimum intefeence fit is equie fo aluminium of.1 pe inch of iamete, fo magnesium of.15" pe in of iamete. Whee beaings ae to be pesse onto a hollow shaft, allowance must be mae fo contaction of the hollow shaft in oe to maintain the esie aial pessue. THE NEI PROUCT ENGINEERING EPARTMENT SHOUL E CONSULTE FOR PROPER FITTING PRACTICE ON ALL SPECIAL APPLICATIONS. AFMA AUTOMOTIVE TAPERE CONE FITTING PRACTICE. Use Application Fit Type Cone oe Shaft iamete Fit Cone oe Shaft iamete Fit Upto 3" boe Above 3" boe Automotive Rotating Shafts Pinion, tansmission ea wheels, cossshaft, tansfe case Ajustable cones T.5L L.15T NonAjustable cones T.5T T.5T iffeential NonAjustable cones T.1T T.15T Automotive Stationay Shafts Font wheels, full floating ea wheels taile wheels Ajustable cones L L..7.12L L AFMA AUTOMOTIVE TAPERE CUP FITTING PRACTICE. Use Application Fit Type Cup O.. Housing oe Fit Cup O.. Housing oe Fit Cup O.. Housing oe Fit Less 3" O.. 3" to 5"O.. Above 5" O.. NonAjustable cups Font wheels, full floating ea wheels pinion, iffential T.25T T.1T T.1T Automotive iffeential NonAjustable cups L.2L L.2L T.2L Rea wheels, tansmission, coss shaft & othe application Ajustable cups Nomal cup O.., L Loose, T Tight T.1L T.1L T.2L 51

60 9.1 Mounting Rolling beaing is a vey pecise pouct an its mounting eseves caeful attention. The chaacteistics of this beaing shoul be thooughly stuie, an it shoul be mounte in the most appopiate manne. It is esie that the assembly of the beaing be fully stuie in the esign an assembly epatments; an stanas be establishe with ega to following items : 1. Cleaning the beaing an elate pats. 9. EARING HANLING enways the most lightly loae beaings. With olle beaings, location may be effecte by a beaing having lips in both aces by plain faces, o by a ball locating beaing. Set scews, keys o simila evices fo fixing the aces shoul be caefully avoie as they eaily istot the ings an cause ove loaing of the balls o olles. Cae shoul be taken to see that the shoules between which the aces ae clampe ae squae with shaft. Potection fom it an moistue is most impotant. PRACTICAL AVICE Checking the imensions an finishing the elate pats 3. Mounting tools. 4. Mounting methos. 5. Checking afte mounting. 6. Amount of lubicant. Mounting shoul be conucte caefully in accoance with the specifie stanas. The otating ace (usually the inne) must be mae of an intefeence fit on its seat to pevent "ceep" o slow otation of the ace elative to the shaft o housing on o in which it is mounte. It is also avisable to clamp it fimly enways. The shoules povie shoul be of ample popotions to ensue a tue abutment fo the ace, but fo stana olle beaings it shoul be elieve at about the iamete of the olle tack. In case of beaings fitte with clamping sleeves an nuts it is necessay to see that these nuts ae tightene to the fullest extent, an it is an avantage if the beaings ae so fitte that the otation of the shaft has a tenency to tighten the nut on the sleeve. The impotance of igily fixing the ace upon o in the evolving pat cannot be too stongly emphasise. The stationay ace ( usually the oute) shoul be a goo fit in its housing pefectly fee fom shake. A stana olle beaing shoul be clampe enways to ensue that the olle's tack is in cente of the ace. eep goove ball beaing if not locating the shaft, must be left fee enways, having a cleaance of appoximately onethi the total with of the beaings. Angula contact beaings cay aial loa an thust loa in one iection but to maintain the balls in coect contact with the tacks it is necessay fo the thust to be at least equal to the aial loa. Whee this is not inheent in the loaing conitions anothe ball beaing must be fitte to povie the balance of the equie thust. This is automatically applie if the opposing beaing is ajuste to take up the en play. Cae is necessay to ensue that ove ajustment oes not too heavily peloa the beaings an in this connection allowance shoul be mae fo any iffeence in themal expansion of shaft an housing. Whee thee is no efinite en thust the shaft mounte on eep goove ball beaings may be locate by clamping I. Stoage 1. Stoe the beaings in a clean. y place in thei oiginal wappings. This will peseve them fom eteioation. 2. Use ole stock fist. 3. o not stack too many beaings on top of each othewise the potective oil coul be squeeze out fom between the beaing an its wapping, thus leaing to coosion poblem. 4. Also, neve stoe lage beaings upight but lay them flat. II. Fitting 1. Absolute cleanliness is essential when hanling beaings. They shoul not be emove fom thei wappings until equie fo fitting. A smooth metaltoppe bench that can be wipe clean is a geat avantage. All tools, shaft, housings an othe components must be pefectly clean. If fitting opeations ae elaye o inteupte, the assembly shoul be wappe with gease poof pape to exclue it an ust. 2. eaing of about 11 inch outsie iamete an lage ia ae potecte by heavy mineal jelly. Thus must be emove befoe the beaings ae use, an one metho is to soak the beaing in clean, hot mineal oil at a tempeatue not exceeing 1 C. 3. All othe beaing ae usually coate with a ust peventative oil, unless pelubicate an/o packe to suit iniviual custome equiements. Thee is no nee to emove this oil unless : i) It is sufficient to cause seious ilution of the oil o gease use in the beaing. This nomally applies to smalle beaings whee the ust peventive oil epesents a lage popotion of the equie amount of lubicant. ii) Low toque is equie. iii) A synthetic lubicant use that may not be compatible with the potecting oil. To emove the ust peventive oil, wash the beaings in a goo quality washing flui ; white spiit o goo quality paaffin is suitable. Allow the beaings to ain thooughly. Finally y them, the following being satisfactoy methos :

61 i) Place the beaings in an oven o on a hot plate, a tempeatue of 658 C shoul be aequate. ii) iect y, clean, compesse ai on the beaings. The cage an ings of smalle beaings must be hel fimly othewise a suen blast of ai woul apily acceleate the fee beaing pats, this coul cause the balls to ski, thus amaging the highly finishe intenal sufaces of the beaing. 4. The fits of the ings on thei seatings ae vey impotant Theefoe ensue that the shaft an housing seatings ae of coect size an of goo shape. 5. All shoules must be smooth an squae with the axis of otation. 6. Neve ive one ing on its seating by blows on the othe. Such blows woul ietievably amage the balls o olles an aceways. If possible, to check that the sleeve is still clampe fimly to the shaft afte a few ays unning. As an aitional pecaution we ecommen that wheneve possible, the beaings ae fitte so that the otation of the shaft tens to tighten the nut on the sleeve. To assist customes who use toque spannes we ecommen that the following toque be applie to the clamping nut fo light seies beaings. Shaft iamete 1"(25mm) Toque on Nut 7.6 Kg.m 1.5" (38 mm) 12.4 Kg.m 2" (5 mm) Kg.m 3" (75 mm) 3.3 Kg.m Fo meium seies beaing we ecommen that the above figues be incease by appoximately 5 pecent. 7. Apply pessue evenly aoun the ings. "A pess is bette than a hamme." 8. Shoul a hamme be use, mil steel o bass tube of suitable size, face up squae, shoul be intepose between it an the beaing. This will istibute the foce of the blows (o athe taps), which shoul be given pogessively aoun the ing. 9. When the pats o a sepaable olle beaings ae bought togethe, the inne ing, the oute ing an the olles must all be squae one with the othe. If not squae, then the olles woul not slie feely, an foce woul have to be use to bing the pats togethe. Such foce woul esult in the olles an aceways becoming scoe an this, in aition to causing noisy unning coul cause ealy failue of the beaing. 1.Whee the ing of a beaing is against an abutment, make sue it is tight home. 11. Fo heavy intefeence fits, inne ings may be shunk on to the seatings afte heating in clean mineal oil at a tempeatue of appoximately 1 C: e sue that the beaing is in contact with the abutment shoule afte it has coole. 12. In this case of tape clamping sleeve an nut beaings, the clamping nut must not be ovetightene, fo this coul expan the inne ing an eliminate all cleaance within the beaing, o even factue the inne ing. We ecommen that when using pin spannes, having a length of appoximately five times the shaft iamete, one o two light hamme blows shoul be given to the hanle of the spanne afte the nut has been tightene as fa as possible by han pessue. This shoul tighten the nut just sufficiently. It is a goo pactice. 53

62 9.1.1 eaing Mounting Poceue Any bus, cutting chips, ust o it shoul fist be emove fom the beaing mounting sufaces. Installation then be simplifie if the clean sufaces ae lubicate with spinle oil. us, it, an othe contaminants that infiltate the beaing befoe an uing mounting will cause noise an vibation an also in subsequent opeation. u u Cutting Cup Cutting Cup Pepaation Poceue u u Contaminant San Pape Remove any bu with fine gae san pape Waste Remove any it an contaminants with a clean pape. Apply light coating oil. OIL Contaminant 54

63 Mounting Poceue Pessing Suface Sufaces with Zeo pessing Loa Toleances Foce applie to inne ing Mounting on Shaft Foce applie to oute ing Foce applie to oute ing Mounting in Housing Foce applie to inne ing Foce applie to inne an oute ings simultaneously using iving plate Simultaneous Mounting on Shaft an in Housing Foce applie to inne an oute ing sepaately Shows inappopiate application of foce to inne ing 55 46

64 9.1.3 Tempeatue Mounting (Heat expansion of inne ing to ease installation) Commonly use fo lage beaings an beaings with a heavy intefeence fit. 1. Immesion of the beaing in heate oil is the most common metho. Use clean oil an suspen the beaing in the oil with a wie o suppot it uneneath using a metal sceen in oe to avoi uneven heating of beaing elements. 2. The tempeatue to which the inne ing shoul be heate epens upon the amount of intefeence fit i.e. the iamete of the intefeence fit sufaces. Refe to the following gaph to etemine the pope tempeatue. 3. To pevent gaps fom occuing between the inne ing an shaft shoule, beaings which have been heate an mounte on the shaft shoul be hel in place until they have coole completely. Obseve these pecautions when heating beaings 1. beaings shoul neve be heate ove 12 C. 2. This tempeatue mounting metho cannot be use fo pegease an seale beaings o shiele beaings. Pegease beaings Amount of inne ing boe iamete expansion µm C Tempeatue ise iffential o heate beaings k5 j5 7 C 6 C 6 p6 n6 m6 5 C 4 C Neve excee an oil tempeatue of 12ºC! 3 C eaing boe iamete mm Othe heating methos 1. eaing Oven eaings ae y. This metho can also be use fo pegease beaings. o not heat the beaings above 12 C. 2. Inuction Heating This metho can also be use fo the inne ings of cylinical olle beaings. eaings ae y an can be heate up in a shot peio of time. Afte using this metho, aministe a emagnetizing teatment to the beaing. eaing Oven 56

65 9.2 ismounting & Replacement 1. Unnecessay emoval of a beaing shoul be avoie, paticulaly whee intefeence fits have been use. Removal can amage the beaing an in some instances, cause eteioation of the intefeence fit. Vey often it is sufficient to clean an elubicate the beaing in its fitte position. Remove a beaing if you nee to inspect it closely. Symptoms that guie ae the conition of the lubicant, the beaing tempeatue an the noise level. 2. With Rolle beaings thee is sometimes a all location beaing. This may be only a push fit on the shaft, an theefoe, facilitates easy ismantling. 3. In cetain applications some fom of extacto may be necessay. This may act iectly on the ing to be emove. Neve ty to emove the inne ing by applying foce on the oute ing o vice vesa. 4. Thust beaings nee offe no ifficulty as push fits shoul have been use, but take cae to keep the ings squae o they will ben. 5. Won shafts, housings an abutments must have attention if ceep has occue. Knuling, scoing o istotion of the seating on which ceep has occue must not be esote to simulate an intefeence fit. Such eceptive pactices ae ineffective, fo ceep will vey often etun all too quickly. Also, even if the ing is pevente fom ceeping it will usually be istote by the seating, with beaing failue esulting fom local oveloaing ofthe aceways an of the balls o olles. 6. When oeing eplacements, be sue to give the symbols make on each of the ings of the beaing if any oubt exists as to the coect beaing numbe. If a housing o seating ing etc. is supplie with the beaing, please also quote the making on it. This is especially impotant fo thust beaings with housings o seating ings, an fo extenally aligning beaings. It is necessay to ensue that the coect aial cleaance is mentione fo ball an olle beaings being oee. 57

66 EARING REMOVAL TOOLS & PROCEURE (a) (b) Removal Using a eaing pulle Removal Using a space Wong Soft metal Coect Soft Metal 58

67 9.3 eaing Cleaning It is selom necessay to clean beaings with the sole object of emoving the ust peventive oil, which they ae coate befoe being packe. Rust peventives with a petoleum jelly base have cetain lubication qualities an in any case since the amount use fo the potection of beaings is small, no ham is one with the gease o oil use fo lubication. As a ule washing shall only be esote to when beaings have become ity o when the mechanism in which they ae use is so sensitive that even slight iegula esistance to otation is not pemissible. Cleaning meia most commonly employe fo use beaing ae : (a) enzene, (b) White Spiit (Low flash point), (c) Tupentine, () Paaffin Oil, (e) Light Spinle Oil, (f) Tichloo Ethylene, (g) Cabon Teta Chloie; (h) Petoleum Ethe METHO OF CLEANING Rough cleaning In Rough Cleaning a sepaate containe shoul be use an to suppot the beaing a sceen shoul be povie. All the cleaning meia as mentione above can be use fo cleaning beaing, if beaing is vey ity, Gasoline shoul be use. Cae shoul be taken to pevent igniting an to pevent usting afte cleaning. In ough cleaning, each beaing is move about vigoously without otating it, since any tappe foeign matte can scatch the olling elements & tacks. If the oil is heate it cleans the beaing effectively. Howeve, neve heat the oil above 1 C. Afte as much as possible of the it has been emove this way, the beaing is tansfee to the final cleaning. Final cleaning Now beaing is submege in clean oil & otate gently the inne ing o oute ing so that insie of the beaing will also be cleane. Afte that, otate the beaing faste until all tace of it has been emove. Now emove the beaing fom bath an wipe it with a clean cloth, apply a coat of ust peventive oil to the beaing an wap it is not going to be use immeiately. It is necessay to always keep insing oil clean. Afte any cleaning pocess it is necessay to potect the beaing by ipping it in hot petoleum jelly o oil, o by applying the gease to be use that it eaches evey pat of the suface. In the latte case otation of beaings is necessay while gease is being applie. Rough cleaning Final cleaning 59

68 9.4 Abutments fo eaings 1. Shaft an housing abutments fo a ball o olle beaing must be flat an squae with the axis of otation. 2. An abutment must be eep enough to clea the ungoun cone aius of a beaing ing an contact its goun face. 3. The aius at the oot of an abutment must be smalle than the cone aius of the ing locate against that abutment, altenatively the oot may be unecut. 4. The ege of an abutment must be euce o chamfee, as a bue ege can so easily ent o istot a beaing ing. all Jounal, Angula Contact an uplex eaings eaings caying axial laos an taking location uty Abutments fo these beaings shoul exten beyon the aceways to avoi shea stesses in the lips. Evey possible cae is necessay to ensue that the abutments ae flat an squae with the axis of otation. Thust eaings Abutments fo Thust beaings shoul exten beyon the pitch cicle iamete of the balls to pevent the washes ishing une loa. Fo stana Thust beaings with one small boe washe an one lage boe washe, the appoximate pitch cicle iamete When a beaing caies heavy axial loa, abutments must be eepe i.e. they shoul not exten beyon the inne ing outsie iamete o below the oute ing boe. A eep abutment can cause ifficulties when a beaing is emove fom its seating an, theefoe, it is avantageous to povie gooves o holes on such an abutment so that a suitable extaction tool can be use. = SmalI boe iamete + Lage outsie iamete 2 In case of beaings with two boe washes, use the pitch cicle iamete fo the same basic beaing size with one lage boe washe an one small boe washe as above RoIle Jounal eaings eaings not caying axial loas o taking location uty The maximum abutment epth is moe impotant ing fo these beaings than fo ball beaings, an maximum inne abutment iamete an minimum oute ing abutment iamete ae ecommene accoingly. oaly these coincie with the iamete of the inne an oute ing aceways espectively. 6

69 1. EARING FAILURE 1.1 Why eaings Fail In geneal, if olling beaings ae use coectly they wiil suvive to thei peicte fatigue life. Howeve, they often fail pematuely ue to avoiable mistakes. Failue of the olling beaing can occu fo a vaiety of easons. Accuate etemination of the cause of a beaing failue is must to make suitable ecommenations fo eliminating the cause. The majo factos that singly o in combination may lea to pematue failue uing sevice inclue incoect mounting, excessive loaing, excessive peloaing, inaequate & insufficient lubication, impact loaing, vibations, contamination, enty of hamful liquis. It is ifficult to etemine the oot cause of some of the pematue failues. If all the conitions at the time of failue, an pio to the time of failue ae known, incluing the application, opeating conitions an envionment, then by stuying the natue of failue an its pobable causes, the possibility of simila futue failues can be euce. Two o moe failue patten can occu simultaneously an can thus be in competition with one anothe to euce the beaing life. Also a patten of failue that is active fo one peio in the life of a beaing can lea to o can even be followe by anothe failue mechanism, which then cause pematue failue. Thus in some instances, a single failue patten will be visible an in othe inications of seveal failue patten will be evient, making exact etemination of oot cause ifficult. So when moe than one beaing failue patten has been occue, pope analysis epens on caeful examination of faile components. In contast to fatigue life, this pematue failue coul be cause by : (1) IMPROPER MOUNTING (2) IMPROPER HANLING (3) POOR LURICATION, (4) CONTAMINATION (5) EXCESSIVE HEATING (6) EXCESSIVE LOA CAUSES OF OPERATING IRREGULARITIES IN A EARING : When cetain iegulaities ae obseve in a beaing, causes mentione below shoul be checke an suitable coective measues shoul be taken. (A) Noise : Possible causes ae : (1) Contact of otating pats (2) Faulty mounting (3) Insufficient / inaequate lubicant (4) Abnomal loa (5) Impope intenal cleaance (6) Sliing of olling element (7) Pesence of contamination (8) Coosion (9) Occuence of flaking on aceways / olling elements. (1) inelling ue to caeless hanling. () Abnomal Tempeatue : Possible causes ae : 1. Fiction in beaing ue to contact of olling pats & seals. 2. Excessive amount of lubicant 3. Insufficient lubicant 4. Impope lubicant 5. Incoect mounting 6. Excessive loa on beaing (C) VIRATION : Possible causes ae : 1. Occuence of binelling, flaking 2. Incoect mounting 3. Existence of foeign objects 61

70 1.2 eaing amage an Coective Measues ESCRIPTION CAUSES COUNTER MEASURES 1. FLAKING Abnomal excessive loa eflection of misalignment of shaft Poo Lubication Ingess of foeign objects Coect accuacy of shaft & housing Impove mounting & alignment Review quantity & type of lubicant Caefully clean & hanle shaft an housing Non unifom ustibution of lubicant Etching Unifom istibution of gease Review the mounting poceue Impove opeating conitions Excessive peloa Coect the amount of peloa Use toque wench to achieve coect peloa Excessive Axial loa Inaequate lubication Contamination Review application conitions. Review quantity & type of lubicant Caefully clean & hanle shaft an housing 2. PEELING Foeign Matte Impope lubication Review type of lubicant & lubication metho Impove sealing efficiency 62

71 ESCRIPTION CAUSES COUNTER MEASURES 3. SEIZURE Loss of cleaance Insufficient lubication Excessive loa Rolle Skew Review fitting & beaing cleaance Select a pope lubicant & fee it in pope quantity Pevent misalignment Impove metho of mounting 4. ISCOLOURATION Ingess of foeign objects Poo lubication Tempe colou by oveheating eposition of eteioate oil on suface Oil eposition shoul be emove by wiping with suitable solvent Select a pope lubicant & fee it in pope quantity 5. FRETTING CORROSION Minute cleaance on fit suface Slight sliing uing opeation as a esult euce intefeence une a loa Swing with smalle amplitue Vibation uing tanspotation Fix shaft & housing Incease intefeence Apply oil Change lubicant Use oil o high consistency gease when use fo oscillation motion 6. AMAGE RETAINERS Excessive loa Impact loa Impope lubication Excessive vibation Ingess of foeign objects Select a pope lubicant & fee it in pope quantity Review of application conitions Investigate shaft an housing igiity Coect the metho of mounting & hanling 63

72 ESCRIPTION CAUSES COUNTER MEASURES 7. CRACKING Excessive impact loa Excessive loa Excessive intefeence fit eaing seat has lage cone aius than beaing Slipping of balls ue to poo lubication Excessive cleaance uing opeation Reevaluate loa conitions Check fits & beaing cleaance Impove the igiity of shaft & housing Coect the metho of mounting & hanling 8. SMEARING Insufficient lubication Ingess of foeign objects Jamming of olling elements in cage pockets Impope mounting Angula movement of shaft while beaings ae stationay une loa Excessive slippage of the olling elements Excess axial loa Select a pope lubicant, quantity & metho Review the loa conitions Impove the sealing Coect mounting faults Clean the shaft & housing Setting of a suitable peloa 9. EXCESSIVE WEAR Coase/Fine matte in the beaing & acts as lapping agents Insufficient lubication Rotational ceep ue to loose fit Skewing of Rolles Inne o oute ing out of squae Impove sealing Check lubicant type & amount Check shaft & housing Coect mounting faults 1. CREEPING Insufficient intefeence in the mating pats Insufficient sleeve tightening Insufficient suface pessue Review the fits Review the usage conitions Reesign fo geate igiity 64

73 ESCRIPTION CAUSES COUNTER MEASURES 11. CHIPPING Impact of excessive loa Poo hanling Ingess of soli objects Impove hanling Impove sealing Review application conitions 12. RUST & CORROSION Impope stoage, cleaning Poo packaging Insufficient ust inhibito Poo ust pevention Chemical action of lubicant Penetation by wate, aci etc. Impove stoage & hanling Impove sealing Peioically inspect the lubicating oil Take cae when hanling the beaing 13. ELECTRICAL PITTING Continuous passage of electic cuent Intemittent passage of electic cuent Ceate a bypass cicuit fo the cuent Insulate the beaing so that cuent oes not pass though it. 14. ROLLERS SKEWING efomation o tilt of beaing ing ue to poo accuacy of shaft o housing Poo igiity of shaft o housing eflection of shaft ue to excessive cleaance Impovement in machining accuacy of shaft an housing Impovement in igiity of shaft an housing. Employment of aequate cleaance 65

74 11. EARING TALES SINGLE ROW RAIAL ALL EARING METRIC SERIES ouny imensions mm Loa Rating ynamic Static ynamic Static KN Kgf Limiting Spee (pm) IR OR smin C C o C C o Open Type Gese Oil eaing Numbes C A/ / M / x55x x56x / /22M /22 66

75 SINGLE ROW RAIAL ALL EARING = + < > h s ø ø1 ø ø With snap ing eaing Numbes Mass Kg (Appox.) Open Type Shiel Non Low toque Contact type TM TS2 AST Snap Ring Type Snap Ring Contact type Goove 6 zz RSS TS zz RSS.3 63 zz LLU RSS zz LUX zz RSS/LUX zz LLU ZZ RSS zz LLH LLU TM zz LLU TM zz RSS zz LLH LLU zz LLV LLH LLU TM C LLH A/42 TM zz LLV LLH LLU /18 LLU AST zz LLH LLU zz LLH LLU TM N M N /2 LLH TM zz RSS TM AST N.147 2x55x x56x17 TS2 N /22 TM /22M LLU TM TS /

76 SINGLE ROW RAIAL ALL EARING METRIC SERIES ouny imensions mm Loa Rating ynamic Static ynamic Static KN Kgf Limiting Spee (pm) IR OR smin C C o C C o Open Type Gese Oil eaing Numbes X56X SP72X25X / / x28x SP SP C SP

77 SINGLE ROW RAIAL ALL EARING = + < > ø ø1 ø ø With snap ing eaing Numbes Mass Kg (Appox.) Open Type Shiel Non Low toque Contact type TM TS2 AST Snap Ring Type Snap Ring Contact type Goove zz LLH RSS TM zz LLU TM N X56X15 ZZ zz LLU TM N NR.225 SP72X25X /28 LLH LLU TM N NR /28 LLU TM N x28x TM zz LLH LLU N NR.116 SP zz LLH RSS TM N NR zz LLH LLU TM N NR N NR zz RSS TM zz LLU TM AST N NR zz LLH LLU TM TS2 N NR.457 SP637 LLU zz LLU N NR zz LLH LLU TM N NR zz LLH LLU TM N NR C LLU N NR zz LLU N NR.237 SP zz N NR zz LLH TM TS2 N NR

78 SINGLE ROW RAIAL ALL EARING METRIC SERIES ouny imensions mm Loa Rating ynamic Static ynamic Static KN Kgf Limiting Spee (pm) IR OR smin C C o C C o Open Type Gese Oil eaing Numbes /

79 SINGLE ROW RAIAL ALL EARING = + < > ø ø1 ø ø With snap ing eaing Numbes Mass Kg (Appox.) Open Type Shiel Non Low toque Contact type TM TS2 AST Snap Ring Type Snap Ring Contact type Goove zz LLU N NR zz LLH LLU TM TS2 N NR zz LLU N NR LLU zz LLU TM N NR zz LLU TS2 N zz LLH LLU zz N NR /125 RSS TM zz LLU NR zz zz RSS RSS zz zz RSS zz zz zz zz

80 SINGLE ROW RAIAL ALL EARING (SPECIAL EARINGS) METRIC SERIES ouny imensions (mm) asic Loa Ratings (N) Limiting Spee (pm) eaing Numbe Abutment an Fillet imensions ynamic Static Gease Oil s h R min. C Co max. min. max ALL EARING ouny imensions (mm) eaing asic Loa Ratings Type Mass ynamic 'C' Static 'C.' Kg. (appox.) / all eaing

81 SINGLE ROW RAIAL ALL EARING R h R s INCH SERIES (.375) 12.7 (.5) (.625) 19.5 (.75) (.875) 25.4 (1.) (1.125) S3 S5 LS5 S7 LS7 MS7 S8 LS8 MS8 S9 LS9 MS9 S1 LS1 MS1 LS11 MS (.875) (1.125) (1.3125) (1.375) (1.5625) (1.8125) (1.625) (1.875) 5.8 (2.) (1.875) 5.8 (2.) (2.25) 5.8 (2.) (2.25) 63.5 (2.5) 63.5 (2.5) (2.8125) (.2188) 6.35 (.25) (.375) (.2813) (.4375) (.625) (.3125) (.5625) (.6875) (.375) (.5625) (.6875) (.375) (.625) 19.5 (.75) (.625) (.8125).4 (.2).4 (.2).8 (.3).8 (.3).8 (.3) 1.6 (.6).8 (.3) 1.6 (.6) 1.6 (.6).8 (.3) 1.6 (.6) 1.6 (.6).8 (.3) 1.6 (.6) 2.4 (.9) 1.6 (.6) 2.4 (.9) 12.7 (.5) 17.5 (.69) 17.5 (.69) 2.6 (.81) 21.1 (.83) 23.1 (.91) 26.2 (1.3) 25.9 (1.2) 26.9 (1.6) 3.2 (1.19) 29.7 (1.17) 3.2 (1.19) 32.5 (1.28) 33.3 (1.31) 34.8 (1.37) 38.1 (1.5) 38.1 (1.5) 18.3 (.72) 23.8 (.94) 29.5 (1.16) 28.6 (1.13) 34.8 (1.37) 39.6 (.56) 35.7 (1.41) 41.1 (1.62) 43.7 (1.72) 4.5 (1.59) 44.5 (1.75) 5. (1.97) 42.9 (1.69) 5 (1.97) 54.5 (2.14) 56.4 (2.22) 61.5 (2.42).3 (.1).3 (.1).5 (.2).5 (.2).5 (.2) 1.1 (.4).5 (.2) 1.1 (.4) 1.1 (.4).5 (.2) 1.1 (.4) 1.1 (.4).5 (.2) 1.1 (.4) 1.6 (.6) 1.1 (.4) 1.6 (.6) ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe mm (inch) mm (inch) mm (inch) mm (inch) ynamic C Static Co Gease Oil s mm (inch) h mm (inch) R mm (inch) Mass Kg, (Appox.) Abutment an Fillet imensions 73

82 SINGLE ROW RAIAL ALL EARING R h R s INCH SERIES (1.375) (1.25) (1.5) (1.625) (1.75) (1.875) 5.8 (2.) LS12 MS12 LS12½ MS12½ LS13 MS13 LS13 ½ MS13½ LS14 MS14 LS14 ½ MS14 ½ LS15 MS (2.75) (3.125) 76.2 (3.) 88.9 (3.25) (3.25) (3.75) 88.9 (3.5) 11.6 (4.) (3.75) (4.25) 11.6 (4.) (4.5) 11.6 (4.) (4.5) (.6875) (.875) (.6875) (.875) 19.5 (.75) (.9375) 19.5 (.75) (.9375) (.8125) (1.625) (.8125) (1.625) (.8125) (1.625) 1.6 (.6) 2.4 (.9) 1.6 (.6) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 2.4 (.9) 41.4 (1.63) 43.7 (1.72) 46. (1.81) 47.8 (1.88) 49.3 (1.94) 5.8 (2.) 54.1 (2.13) 56.6 (2.23) 57.2 (2.25) 59.4 (2.34) 63.5 (2.5) 65. (2.56) 63.5 (2.5) 65. (2.56) 62.7 (2.47) 69.1 (2.72) 68.3 (2.69) 76.2 (3.) 73.4 (2.89) 82.6 (3.25) (3.6) 88.1 (3.47) 87.1 (3.31) 93.7 (3.69) 92.2 (3.63) 1.1 (3.94) 92.2 (3.63) 1.1 (3.94) 1.1 (.4) 1.6 (.6) 1.1 (.4) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) 1.6 (.6) ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe mm (inch) mm (inch) mm (inch) mm (inch) ynamic C Static Co Gease Oil s mm (inch) h mm (inch) R mm (inch) Mass Kg, (Appox.) Abutment an Fillet imensions 74

83 SINGLE ROW ANGULAR CONTACT ALL EARING R R h s a METRIC SERIES ouny imensions min asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) Gease Oil eaing Numbe s max. Abutment an Fillet imensions h min. R max. Loa Cente a Mass Kg, (Appox.)

84 SINGLE ROW ANGULAR CONTACT ALL EARING 2 R R R R h s 1 a a INCH SERIES mm (inch) ouny imensions (mm) mm (inch) mm (inch) mm (inch) asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Numbe Gease Oil s mm (inch) Abutment an Fillet imensions h mm (inch) 1 mm (inch) R mm (inch) Loa Cente a mm (inch) Mass Kg, (Appox.) LS19½ AC (3.5) (6.) (1.625) (.9) (3.94) (5.28) (.8) (2.9) N4711C (6.) (2.125) (.9) (3.94) (5.51) (.8) (2.9) 76

85 SINGLE ROW EXTERNALLY ALIGNING ALL EARING H R h R S INCH SERIES mm (inch) mm (inch) ouny imensions (mm) mm (inch) H mm (inch) mm (inch) asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Numbe Gease Oil s mm (inch) Abutment an Fillet imensions h mm (inch) R mm (inch) Mass Kg, (Appox.) MSN (1.75) (4.625) (1.125) (1.625) (.9) (2.34) (4.33) (.6) 77

86 OULE ROW SELF ALIGNING ALL EARING R R h s METRIC SERIES ouny imensions min. asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Numbe Gease Oil s max. Abutment an Fillet imensions h min. R max. Mass Kg, (Appox.)

87 OULE ROW SELF ALIGNING ALL EARING R R h s INCH SERIES mm (inch) ouny imensions (mm) mm (inch) mm (inch) mm (inch) asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) Gease Oil eaing Numbe Abutment an Fillet imensions s mm (inch) h mm (inch) R mm (inch) Mass Kg, (Appox.) ULS12V (1.25) (2.75) (.688) (.6) (1.77) (2.41) (.6) 79

88 OULE ROW SELF ALIGNING ALL EARINGS WITH TAPER CLAMPING SLEEVE AN NUT E R H L u t S 1 h METRIC SERIES ouny imensions (mm) L E H asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Numbe Gease Oil t max. u max. Abutment an Fillet imensions h min. S 1 max. R max. Mass Kg, (Appox.) K K K K K K

89 SPECIAL EARING RACES R R R

90 l ouble Row Angula Contact Seale eaings (Wheel Application) '' GEN 1 ball type '' Type with integate seal x y GEN 1 ouny imensions (mm) x (min.) y (min.) Lubication The objective of lubication is to fom a film of oil on olling o sliing suface to pevent the metals fom making iect contact with each othe, Lubication has the following effects : 1. Reuces fiction an wea. 2. Extens eaing life. 3. Pevents usting. 4. Pevents penetation of foeign matte. Fetting wea paticulaly tens to occu on the aceway of RAC eaing uing tanspot of finishe automobiles. Theefoe the fetting esistance popety of Lubicant shoul be taken into account while selecting lubicant fo RAC eaings. Seals A special Low toque high pefomance (LTHP) seal on both sies of the RAC eaing pevent wate ingess in the beaing an have low toque. It consists of 3lips Gease Lip, ust Lip an Sie Lip. A stainless Steel Slinge is ae to the 3lip seal sliing pat, which amatically enhances ust esistance of the sliing pat of the lips. Sie lip is ae fo impoving the sealing pefomance. istance etween Pessue Cone Appexes) (mm) Metal Stiffne Packing Chaacteistics Make Name Thickene ase Oil Woking Tempeatue Colou Remaks eaing Numbe Sie Lip ust Lip Gease Lip asic Loa Rating (kn) ouble Row ynamic C Resists fetting, enhances potection against ust Nippon Oil Japan PYRONOC Univesal N6/N6C Uea Mineal Oil 3 to 15 C Ceam Fetting Resistance Excellent Recommene gease fo Passenge Cas Slinge Static Co Mass (Appox.) AU1192LLX AU545LX2LX AU113M2LLX AU7276LX2LX AU7276LLX AU1152LLX AU1112LX2LX AU1172LX2LX Gease Filling 82

91 ouble Row Angula Contact Seale eaings (Wheel Application) GEN 2 ball type ouny imensions i 1 a f w b Pb x (min.) istance etween Pessue Cone Apexes eaing asic Rate Loa (KN) Single Row y Numbe (min.) I (min.) C Co No. of Hub olts Mass (kg) (efeence) øf øp ø øe 1 2 ø ø x y 83

92 O SPECIAL EARINGS Clutch Release eaing eaing Numbe ouny imensions asic Loa Rating (N) ynamic C Static Co C CR SP36445C O elt Tensiones ouny imensions eaing Numbe ynamic C asic Loa Rating (N) Static Co JPU O Pillow blocks cast housing Set scew type Shaft ia Unit No. H L J A N N1 H1 H2 L1 S OLT SIZE eaing No. 25 UCP2SI M1 UC o o SINGLE ROW RAIAL ALL EARING (SPECIAL EARING) METRIC SERIES ouny imensions (mm) 1 min. asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Numbe Gease Oil s max. METRIC SERIES Abutment an Fillet imensions /22SPL h min. R max. 84

93 SINGLE ROW CYLINRICAL ROLLER EARINGS R R R R 1 1 h s TYPE NU TYPE NJ NH = NJ + HJ TYPE NUP TYPE N TYPE NF METRIC SERIES METRIC ouny SERIES imensions (mm) asic Loa Rating (N) ynamic C Static Co Limiting Spee (pm) eaing Abutment an Fillet imensions Gease Oil Numbe s 1 h 1 R Mass Kg, (Appox.) X58X NU25E NJ N25E NJ225E NJ35E NU NJK NJ N NU35E NJ235E NU235E NUP X58X / CR NJ226EF NUP36EN N36EF NJ27EF NJ227E N / NJ37/J / N NJ37EF NU37ENS MU N NUP28E NJ NU NH28/J NUP28/J NU228E NU228E NJ228E Full Complement Rolle eaing 85

94 SINGLE ROW CYLINRICAL ROLLER EARINGS R R R R 1 1 h s TYPE NU TYPE NJ NH = NJ + HJ TYPE NUP TYPE N TYPE NF METRIC SERIES METRIC ouny SERIES imensions (mm) ynamic C asic Loa Rating (N) Static Co Limiting Spee (pm) eaing Abutment an Fillet imensions Gease Oil Numbe s 1 h 1 R Mass Kg, (Appox.) N NJ38E NF38E NUP29E NJ29E NU229EN NU NU39N NF NJ NUP39N NJ39VN NU39E NU39EN NUP39E NUP39V NUP39EM CR NH N NUP31N NU NJ NUP31N NU NJ NJ311EF NUP212E N312EM N312EF(2312) NUP313E N313EM N314EF NUP315E Full Complement Rolle eaing 86

95 SINGLE ROW CYLINRICAL ROLLER EARINGS TYPE NU TYPE NJ NH = NJ + HJ TYPE NUP TYPE N TYPE NF METRIC SERIES ounay imensions asic Loa Rating (N) asic Loa Rating (Kgf) Limiting Spees (RPM) Mass eaing numbes oe () O () With () ynamic C Static Co ynamic C Static Co Gease Oil Kg (Appox.) N321M NU321M NU224M CRL CRM NU226M NU5226M NU228M NU23M NU523M (With Sleeve AHX3228) NU332M N NU5236M NU338EM NU NU524M NU244M NU NU NU NU18EMA / / N / Full Complement Rolle eaing 87

96 SINGLE ROW CYLINRICAL ROLLER EARINGS R R 1 1 TYPE N INCH SERIES mm (inch) ouny imensions (mm) mm (inch) mm (inch) H mm (inch) asic Loa Rating (N) ynamic C Static Co asic Loa Rating (kgf) ynamic C Static Co Limiting Spee (pm) Abutment an Fillet imensions Gease Oil eaing Numbe s 1 h 1 R RLS (1.) (2.25) (.625) (.4) (1.378) (1.378) (.4) N314E CRL Mass Kg, (Appox.) CRM CRL N

97 MULTI ROW CYLINRICAL ROLLER EARINGS TYPE NNU Cylinical boe Tapee boe TYPE NN Cylinical boe Tapee boe OULE ROW CYLINRICAL ROLLER EARING ounay imensions eaing numbes oe () O () With () asic Loa Rating (N) ynamic C Static Co asic Loa Rating (Kgf) ynamic C Static Co NN324K NN326K P NNU4144MW33X NNU NNU464MW33X Limiting Spees (RPM) Gease Oil Mass Kg (Appox.) FOUR ROW CYLINRICAL ROLLER EARING esign 1 esign 2 ounay imensions eaing numbes oe () O () With () asic Loa Rating (N) ynamic C Static Co asic Loa Rating (Kgf) ynamic C Static Co Limiting Spees (RPM) Gease Oil Mass Kg (Appox.) N N R FCP N R

98 SPECIAL CYLINRICAL ROLLER EARING INCH SERIES eaing Numbes mm (inch) mm (inch) mm (inch) L (1.627) (1.9993) (.6875) RNU RNU RNU N (IA UNER ROLLERS) INCH SERIES eaing Numbes mm (inch) mm (inch) mm (inch) N (1.25) (3.124) (.875) INCH SERIES eaing Numbes mm (inch) mm (inch) mm (inch) L (1.) (2.1274) (1.125) IA. OVER ROLLERS ouny imensions mm (inch) mm (inch) mm (inch) mm (inch) eaing Numbe Appox mass (kg,) N N

99 SPECIAL CYLINRICAL ROLLER EARINGS METRIC SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co L WU1X2W R R R R L L WJP12x24P R WJP13x24P WJP13x24PE L R R R L WJP13x3P R L INCH SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co L (4.25) 23.2 (8.) (2.25) L (5.5) 254. (1.) (2.8125)

100 SPECIAL CYLINRICAL ROLLER EARINGS METRIC SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co WJ1X R R R R L L WJP12x24P R R NR R R WJP13x WJP13x24E L R R R R L WJP13x R L INCH SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co L (4.25) 23.2 (8.) (2.25) L (5.5) 254. (1.) (2.8125)

101 SPECIAL CYLINRICAL ROLLER EARINGS TYPE I TYPE II TYPE III TYPE IV TYPE V TYPE VI METRIC SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co L R NR R R WJP13x24P WJP13x24PE L R R R R R R R L L

102 SPECIAL CYLINRICAL ROLLER EARINGS TYPE NU TYPE NJ TYPE NUP TYPE N TYPE NF NH = NJ + HJ FOR TRACTION MOTOR APPLICATION METRIC SERIES eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co NH NUP NU NU NH NJ NH NJ NU NU NU NU NU All eaings ae mae with Rivete ass Cage. 2. Make beaings ae also available with Rivetless ass Cage. 94

103 OULE ROW CYLINRICAL ROLLER SEALE UNIT TYPE VII eaing numbes ounay imensions oe () O () With () asic Loa Rating (N) ynamic C Static Co R R

104 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup / LM11749/ LM LM11949/ LM M12644/ M M12649/ M / M84548/ M S/ S/ 1525X / L44649/ L / R/ / / M86649/ M LM6748/ LM / / / A/ S/

105 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) 1159/ LM11749/ LM LM11949/ LM M12644/ M M12649/ M / M84548/ M S/ S/ 1525X / L44649/ L / R/ / / M86649/ M LM6748/ LM z / / / A/ S/

106 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup M8848/ M / LM48548/ LM A/ HM88694/ HM / / / / X/ 3424S / / / / LM3849X/ LM LM51349/ LM / M8248/ M / /

107 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) M8848/ M / LM48548/ LM A/ HM88694/ HM / / / / X/ 3424S / / / / LM3849X/ LM LM51349/ LM / M8248/ M / /

108 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup HM83149/ HM / HM93249/ HM / 532A C/ LM6349/ LM / S/ 362A HM84846/ HM / C/ / / / C/ / 532X Ch / C/ A/ 453X / X (X32212)/3922X (X32212) HM911244/ HM

109 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) HM83149/ HM / HM93249/ HM / 532A C/ LM6349/ LM / S/ 362A HM84846/ HM / C/ / / / C/ / 532X / C/ A/ 453X / X(X32212)/3922X(X32212) HM911244/ HM

110 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup / X/ 3927XA X/ / / HM21247/ HM JHM51364/ JHM JLM71949C/ JLM / S/ 394A / HM21249/ HM A/ 394A / / / / A/ TM29685/ TM / M32216A/ M32216E 12

111 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) 28985/ X/ 3927XA X/ / / HM21247/ HM JHM51364/ JHM JLM71949C/ JLM / S/ 394A / HM21249/ HM A/ 394A / / / / A/ TM29685/ TM / M32216A/ M32216E

112 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup / / 572X / JM / JM JL / JL A / 592A / / TM37425 / TM / / HM / HM HH23448 / HH2341Z H93634 /H HH /HH H /H23811E 14

113 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) 495/ / 572X / JM716648/ JM JL819349/ JL A / 592A / / TM37425/ TM / / HM231132/ HM23111 HH23448/ HH2341Z 3 H93634/ H HH437549/ HH H238148/ H23811E

114 SINGLE ROW TAPERE ROLLER EARINGS T b R a INCH SERIES ouny imensions asic Loa Rating (N) Limiting Spee (pm) eaing Numbe T b R ynamic Static mm mm mm mm mm mm mm C Co Gease Oil Cone / Cup / M236848/M / HH84249/HH EE3575/ H242649/H M244249A/N N159/M / HH249949/HH M349547/M M249747/M H852849/H M278749/M EE53826/

115 SINGLE ROW TAPERE ROLLER EARINGS Equivalent beaing loa ynamic P XF YFa R 1 Fa Fa F e F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 s 1 eaing Numbe Abutment an Fillet imensions Loa Cente Mass (Appox.) Cone / Cup s 1 h 1 R 1 1 e y a kg mm mm mm mm mm mm mm mm mm (lb) 67787/ M236848/ M / HH84249/ HH EE3575/ H242649/ H M244249A/ N16 N159/ M / HH249949/ HH M349547/ M M249747/ M H852849/ H M278749/ M EE53826/

116 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating Limiting Spee (mm) (N) (pm) ynamic Static T b R Gease Oil C Co eaing Numbe X N x1N C X C /32X 18

117 SINGLE ROW TAPERE ROLLER EARINGS 1 Equivalent beaing loa ynamic P XF YFa Fa Fa e F F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 R 1 s 1 eaing Numbe s min h Abulant an Fillet imensions X N x1N C X C /32X Loa Cente 1 1 R1 1 a e y max max min min max (mm) Mass kg (appox) 19

118 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating Limiting Spee (mm) (N) (pm) T b R ynamic C Static Co Gease Oil eaing Numbe X X N N X

119 SINGLE ROW TAPERE ROLLER EARINGS 1 Equivalent beaing loa ynamic P XF YFa Fa Fa e F F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 R 1 s 1 eaing Numbe s min h Abulant an Fillet imensions 327X X N N X Loa Cente 1 1 R1 1 a e y max max min min max (mm) Mass kg (appox) 111

120 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating Limiting Spee (mm) (N) (pm) T b R ynamic C Static Co Gease Oil eaing Numbe X N C 112

121 SINGLE ROW TAPERE ROLLER EARINGS 1 Equivalent beaing loa ynamic P XF YFa Fa Fa e F F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 R 1 s 1 eaing Numbe s min h Abulant an Fillet imensions Loa Cente 1 1 R1 1 a e y max max min min max (mm) Mass kg (appox) 321X N C

122 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating Limiting Spee (mm) (N) (pm) T b R ynamic C Static Co Gease Oil eaing Numbe

123 SINGLE ROW TAPERE ROLLER EARINGS 1 Equivalent beaing loa ynamic P XF YFa Fa Fa e F F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 R 1 s 1 eaing Numbe s min h Abulant an Fillet imensions Loa Cente 1 1 R1 1 a e y max max min min max (mm) Mass kg (appox) 115

124 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating Limiting Spee (mm) (N) (pm) T b R ynamic C Static Co Gease Oil eaing Numbe X X

125 SINGLE ROW TAPERE ROLLER EARINGS 1 Equivalent beaing loa ynamic P XF YFa Fa Fa e F F e X Y X Y 1.4 Y2 static Po.5F YoFa When Po F use Po F Fo values of e, Y2an Yo see the table below. h 1 R 1 s 1 eaing Numbe s min h Abulant an Fillet imensions Loa Cente 1 1 R1 1 a e y max max min min max (mm) 3217X Mass kg (appox) X

126 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating asic Loa Rating eaing Numbe (mm) (N) (kgf) T b R ynamic C HM HM Static Co ynamic C Static Co Cone Cup 118

127 SINGLE ROW TAPERE ROLLER EARINGS 1 R 1 h 1 s 1 eaing Numbe Abutment an Fillet imensions Cone Cup s 1 h 1 R 1 1 Mass kg (Appox) HM HM

128 SINGLE ROW TAPERE ROLLER EARINGS T b R a METRIC SERIES ouny imensions asic Loa Rating asic Loa Rating eaing Numbe (mm) (N) (kgf) T b R ynamic Static ynamic Static C Co C Co X 3234X JM JM JM JM X 3238X HH HH /71 179/71M /9 179/ /9 71/ / /132 Cone Cup 12

129 SINGLE ROW TAPERE ROLLER EARINGS 1 R 1 h 1 s 1 eaing Numbe Abutment an Fillet imensions Cone Cup s 1 h 1 R 1 1 Mass kg (Appox) X 3234X JM JM JM JM X 3238X H H /71 179/71M /9 179/ /9 71/ / /

130 OULE ROW TAPERE ROLLER EARINGS i e 1 TO TYPE TI TYPE ouny imensions asic Loa Rating asic Loa Rating eaing Numbe (mm) (N) (kgf) i e 1 ynamic Static ynamic Static C Co C Co Cone Cup U295337ZZ U295337ZZ HM HM NA HM HM X/F 31328X/F NA X/F 3236X/F EE X X HH HH X X

131 OULE ROW TAPERE ROLLER EARINGS S 2 R1 R 1 s Cone eaing Numbe Cup s min Abutment an Fillet imensions 1 min U295337ZZ U295337ZZ HM HM TO TO TO NA TNA HM HM92671 TI TI TO TI X/F 31328X/F 51.5 NA TNA TI TO TO TI TO X/F 3236X/F TO TI TO 49.3 EE TI X X2 TI TI HH HH24991 TO X X2 TI TO TO TI TI 124 S 2 max R 1 min R 1 max Type Mass kg (Appox) 123

132 OULE ROW TAPERE ROLLER EARINGS i e 1 TO TYPE TI TYPE ouny imensions asic Loa Rating asic Loa Rating eaing Numbe (mm) (N) (kgf) i e 1 ynamic Static ynamic Static C Co C Co Cone Cup HH HH EE12912X/172F EE12912X/172F N121 N N121 N121M HM HM HM HM JM966747W JM966718W EE EE / / / / /6 1979/ EE / / EE / /95 124

133 OULE ROW TAPERE ROLLER EARINGS S 2 R1 R 1 s Cone eaing Numbe Cup s min Abutment an Fillet imensions 1 min HH HH25511 TI TO 62.9 EE12912X/172F EE12912X/172F 71 N121 N121 TI N121 N121M TI TO TI 235 HM HM TO TI TO 243. HM HM TO 165. JM966747W JM966718W TI TO 18. EE TO TO TO TI TO 151. EE TO / /56 TO / /56 TI /6 1979/6 TO 242. EE TO / /71 TO 415. EE TO / /95 TO 93. S 2 max R 1 min R 1 max Type Mass kg (Appox) 125

134 FOUR ROW TAPERE ROLLER EARINGS e i R R ouny imensions asic Loa Rating asic Loa Rating eaing Numbe (mm) (N) (kgf) e i R ynamic C Static Co ynamic C Static Co Cone Single Cup ouble Mass Type Kg, (Appox.) / X TQI TQO M24631T M24644 TQIT T/647T TQO T T T44323 TQO M25233T M25231M TQIT TQIT LM451349W LM45131 LM45131 TQO LM LM65461 LM65461 TQO "381156/C9" "381156/C9" "381156/C9 TQO 22 (177756) (177756) (177756) N128 N128 N128 TQO LM654648W LM65461 LM65461 TQO LM761649W LM76161 LM76161 TQO LM763449W LM76341 LM76341 TQO M263349W M26331 M26331 TQO LM767749W LM76771 LM76771 TQO LM769349W LM76931 LM76931 TQO JM171649GW JM17161 JM17161 TQO EE243193W TQO /5 771/5 771/5 TQO /5 1777/5 1777/5 TQO EE TQO /6 779/6 779/6 TQO /63 771/63 771/63 TQO L L28111 L28111 TQO N114 N115 N116 TQO /75 777/75 777/75 TQO LM LM28781 LM28781 TQO 439. Type: TQO = One ouble cup, two single cups, with two cup spaces, two ouble cones with one cone space TQIT = Two ouble cups with one cup space, one tapee boe ouble cone & two tapee boe single cone without cone space TQI = Two ouble cups with one cup space, one ouble cone & two single cone 126

135 THRUST EARINGS E E T T C C TL SERIES ALL THRUST CR THRUST TR THRUST TTH TYPE TR THRUST TTVF TYPE ouny imensions (mm) C E T eaing Numbe asic Loa Rating ynamic C THRUST SPHERICAL ROLLER EARINGS (N) Static Co asic Loa Rating ynamic C (kgf) Static Co Type Weight kg (Appox.) TL all Thust(TL Seies) TL all Thust(TL Seies) TL all Thust(TL Seies) TL all Thust(TL Seies) all Thust / all Thust / all Thust N all Thust T CR Thust AT CR Thust T TR Thust (TTH) CR Thust T611/HC TR Thust (TTH) T811TTH TR Thust (TTH) T TR Thust (TTH) CR Thust T TR Thust (TTVF) N CR Thust 157 Spheical olle thust beaings can accommoate heavy axial loa, they ae aapte to high spees These beaings ae fitte with assymmetical bael shape olle. eaing Numbe ounay imensions (mm) T Weight kg. (Appox.) 29284EM EM E EMN1E

136 SPHERICAL ROLLER EARINGS METRIC SERIES Cylinical boe eaing numbes ounay imensions (mm) oe () O () Tapee boe (K) (1:12) With () asic Loa Rating (N) ynamic C Static Co asic Loa Rating (Kgf) ynamic C Tapee boe (K3) (1:3) Static Co Limiting Spees (RPM) Mass Kg Gease Oil (Appox.) 2228, 2228K , 2238K , 2229K , 2239K , 2221K , 2231K MW33, 22211MKW , 22311K MW33, 22212MKW CAW , 22312K MW33, 22213MKW , 22313K , 22314K MKW CAW , 22315K MW33, 22216MKW , 22316K MW33, 22217MKW , 22317K MW33, 22218MKW MW , 22318K MW CAK, 22319CAKW MW33, 2222MKW MW , 2232K MW , 22222K MW MW33, 22322MKW

137 SPHERICAL ROLLER EARINGS METRIC SERIES Cylinical boe eaing numbes ounay imensions (mm) oe () O () Tapee boe (K) (1:12) With () asic Loa Rating (N) ynamic C Static Co asic Loa Rating (Kgf) ynamic C Tapee boe (K3) (1:3) Static Co Limiting Spees (RPM) Mass Kg Gease Oil (Appox.) 23124MW , 22224K MW MW33, 22324MKW MW , 22226K MW33, 22326MKW MW33, 23226MKW MW33, 22328MKW , 23228K , 22228K MW33, 243MK3W MCAW M, 2233MKW E MW33, 2432MK3W MCAW MW MW MW , 22234K MCAW33, 22334ME1CCW33, CAW33S M, 22236MW MW CCKW33+A MW M, 2224MW CAW33S MW MKW33, 236CKW CAW CAW /56K3CAW33XS

138 AAR STANAR CARTRIGE TAPERE ROLLER EARINGS b OUNRY IMENSIONS (mm) b eaing Size ynamic C LOA RATING CTR 6X11 CLASS 'E' CTR 5 1/2X1 CLASS '' CTR 6 1/2X12 CLASS 'F' Static Co NOTE: AVAILALE WITH POLYMIE CAGE ALSO. 13

139 METRIC CARTRIGE TAPERE ROLLER EARINGS b OUNRY IMENSIONS b eaing Size ynamic C LOA RATING Static Co UIC13X NOTE: AVAILALE WITH POLYMIE CAGE ALSO. 131

140 UNITS SPECIFIE IN SI SYSTEM Foce Pessue 1 KN (Kilo newton) = 1N = 12Kgf 1 Kgf = 9.81N 1 ba = 1 N/cm = 1.2 Kg/cm 2 1 Kgf/mm = N/cm =.981 ba Stess Contact Pessue Toque Enegy 2 1 N/mm = 1 Mpa (Mega pascal) 2 =.12 Kgf/mm 2 1 Kgf/mm = N/mm 1 Nm =.12 Kgfm 1 Kgfm = 9.81 Nm 2 2 Powe 1 W = 1J/s = 1 Nm/s =.12 Kgfm/s 1 J (Joule) = 1 Nm = 1Ws (Watt Secon) =.12 Kgfm 1 Kgfm = 9.81 ws = 9.81 Nm = 9.81 J 1 KW = 1.36 PS = 12 Kgfm/s 1 PS =.736 KW = 75 Kgfm/s 1 Kgfm/s = 9.81 Nm/s = 9.81 J/s = 9.81 W Kinematic Viscosity 2 1mm /s = 1cst (Centi stoke) 132

141 INCH SIZE METRIC SIZES asic iamete Weight pe 1 balls in kg asic iamete Weight pe 1 balls in kg 7/64 1/8 5/32 3/16 7/32 15/64 1/4 17/64 9/32 5/16 11/32 3/8 13/32 7/16 15/32 31/64 1/2 17/32 9/16 19/32 5/8 21/32 11/16 23/32 3/4 25/32 13/16 27/32 7/8 29/32 15/16 31/ STEEL ALLS 133

142 INCHES TO MILLIMETERS. FRACTIONS. MILLIMETERS TO INCHES UNITS. CONVERSION TALES. mm Inches mm 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 3/32 5/32 7/32 9/32 11/32 13/32 15/32 3/64 5/64 7/64 11/64 13/64 15/64 17/64 19/64 21/64 23/64 25/64 27/64 29/64 31/ /32 1/64 Inches mm 9/16 5/8 11/16 3/4 13/16 7/8 15/16 31/32 29/32 27/32 25/32 23/32 21/32 19/32 17/32 33/64 35/64 37/64 39/64 41/64 43/64 45/64 47/64 49/64 51/64 53/64 55/64 57/64 59/64 61/64 63/

143 mm Inch mm FRACTIONS mm Inch mm Inch mm Inch MILLIMETERS TO INCHES UNITS. CONVERSION TALES. Inch mm Inch mm Inch mm

144 1 Mete = inches 1 Inch = millimetes Haness convesion table (efeence) Rockwell haness C scale 1471.N (15kgf) (18) (16) (14) (12) (1) ( 8) ( 6) ( 4) ( 2) ( ) Vicke's haness Stana steel ball Tungsten cabie steel ball A scale 588.4N (6kgf) scale 98.7N (1kgf) (19.) (18.5) (18.) (17.5) (17.) (16.) (15.5) (14.5) (14.) (13.) (12.5) (11.5) (11.) Shoe haness RINELL HARNESS ROCKWELL HARNESS 136

145 A W A R S & C E R T I F I C AT E S WINNER Note: This publication gives technical infomation about NC poucts ange. Evey cae has been taken to ensue the accuacy of the infomation containe in this publication, but no liability can be accepte fo any loss o amage whethe iect, iniect o consequential aising out of use of the infomation in this catalogue. National Engineeing Inusties Lt. eseves the ight to make changes to this ocument an the poucts escibe heein, at anytime, without obligation on National Engineeing Inusties Lt. to povie notification of such change.