Inch Series TAPERED ROLLER BEARINGS

Transcription

1 Inch Seies APERED ROLLER EARINGS

2 Inch Seies APERED ROLLER EARINGS

3 Publication of New Inch seies apeed Rolle eaing Catalog Allow us to expess ou heatfelt appeciation fo you valuable patonage. At this time we ae pleased to povide you with ou new Koyo Inch Seies apeed Rolle eaing Catalog. JEK Copoation has long enjoyed a stong eputation as a make of inch-seies tapeed olle beaings fom the time of its pedecesso Koyo Seiko, and in ecent yeas we have continued intense R&D activities to make impovements in such aeas as the size, weight, and envionmental fiendliness of these beaings. he fuits of these effots ae eflected in the beaings descibed in this new catalog. You will notice that this new catalogue has undegone a thoough evision fom the pevious vesion and contains model infomation based on the latest esults. We believe this catalogue will pove valuable to you in you selection and use of Koyo beaings, and we look fowad to you continued patonage. he contents of this catalog ae subject to change without pio notice. Evey possible effot has been made to ensue that the data heein is coect; howeve, JEK cannot assume esponsibility fo any eos o omissions. Repoduction of this catalog without witten consent is stictly pohibited

4 APERED ROLLER EARINGS Contents echnical section 1 Outstanding featues of tapeed olle beaings 4 2 Stuctue of tapeed olle beaings Single-ow Double-ow 6 3 eaing sevice life eaing sevice life asic dynamic load atings Calculation of sevice life Coection of basic dynamic load ating fo high tempeatue use and dimension stabilizing teatment Modified ating life Lnm asic static load ating Safety coefficient 12 4 Equivalent load Dynamic equivalent load Static equivalent load 15 Specification tables Single-ow Seies No. INDEX 24 S type 38 SS type 12 S type Metic "J" seies 18 Double-ow DI type 11 DIS type 12 DI type 122 DO DOS type 126 NA type 146 Supplementay tables 1 Shaft toleances Housing boe toleances SI units and convesion factos Geek alphabet list 16 5 Pefixes used with SI units 16 5 eaing toleances ounday toleances fo tapeed olle beaings 16 6 Numbeing system 18 7 ypical applications 2

5 1 Outstanding featues of tapeed olle beaings 1 Outstanding featues of tapeed olle beaings 1) Highe load atings apeed olle beaings with highe load atings can accept adial loads o axial loads in one diection and combined adial and axial loads. his type of beaing is suitable fo use unde heavy load o impact load. F 2) he cup can be mounted sepaately fom the cone assembly Since the cup is sepaable fom the cone assembly, the cone assembly can be installed on the shaft and the cup in the housing, individually. his featue facilitates mounting of the beaing while making the design of the shaft and housing simple. In addition, moe options egading the fitting pactice employed ae available than with any othe type of beaing. 3) Mounted cleaance is adjustable In geneal, beaings of unitized design ae supplied with a pedetemined adial cleaance which will vay accoding to fitting pactice and application. apeed olle beaings on the othe hand can be adjusted at the time of installation by vaying the axial location of eithe the cone assembly o cup. 4

6 2 Stuctue of tapeed olle beaings 2.1 Single-ow apeed olle beaings consist of cup, cone, olles and a cage. his beaing contains tapeed olles fo its olling element which ae guided by the cone backface ib on the olle lage end face. he aceway sufaces of cone and cup and the olling contact suface of olles ae designed so that the espective apexes convege at a point on the beaing cente line. Cup Rolle Cone Cage eaings ae classified into standad, intemediate and steep types, in accodance with thei contact angle (α). he lage the contact angle is, the geate the beaing esistance to axial load Cup aceway 2 Cone aceway 3 Cone backface ib 4 Cone font face ib 5 Rolle lage end face 6 Rolle small end face 7 Included cup angle 8 Included olle cente angle 9 Included cone angle S type (pages 38, 18) SS type (page 12) Standad contact angle Medium contact angle Steep contact angle 5

7 2 Stuctue of tapeed olle beaings 2.2 Double-ow ( Double-ow (Face to face) DI type (page 11) he DI type beaing is made up of two single-ow cups and one double cone, and is geneally povided with a cup space. he beaing with cup space is handy fo mounting, as its end play has been pe-adjusted fo each application. he space is povided with an lubication goove and seveal lubication holes. Used fo oll neck of medium-duty olling mills, speed educes, etc. Design 1 Design 1-P DIS type Fo axial supot (page 12) he DIS type beaing is of the same constuction as the DI type, except that it has lage contact angle so that it can accommodate heavie axial load. Used fo applications whee the axial load is geate than the adial load o whee only the axial load is applied. he beaing with the key way on the cone is mainly used fo ollling mill oll necks. he beaing may be also used with peload without using the cup space. Design 1 Design 1-P Example of key way Design 2 Design 2-P DI type apeed boe (page 122) Whee the intefeence fit is necessay, and needs to be emoved fequently, the use of DI type is convenient. It is also possible to mount the beaing on the shaft by using an adapto sleeve. Used fo oll neck of light o medium-duty olling mills and oll neck of calenda mills. he use of a hydaulic unit will facilitate beaing mounting/ dismounting. he oll neck tape needs to be matched to the boe diamete of beaing by using tape gauge, sign ba gauge, etc. Design 1 Design 1-P 6

8 ( Double-ow (ack to back) DO, DOS type (page 126) he DO type beaing is made up of one double cup, two single-ow cones and one cone space. he cup is povided with seveal lubication holes. he cone space has been adjusted to povide an end play suitable to each application. It is also possible to feely adjust the end play fo use by emoving the cone space, howeve, it equies time and labo. Suitable to case whee moment may act. Used fo speed educe, winding machine, etc. Design 1 Design 1-P he steep angle type (DOS type) having lage contact angle has inceased axial load capacity, and is widely used fo wom shaft of medium, heavy duty applications, thust beaing of educes etc. Design 2 Design 2-P NA type (page 146) he NA type beaing has diffeent assembled width toleance fom the DO type, specially selected fo the NA type. Design 1 Design 2 (with cone space) [Refeence] Featues of beaing with pin type cage (1) Load ating can be inceased. he pin type cage accommodates a lage numbe of olles, thus making it possible to incease the load ating of beaing. (2) Reduced fiction esistance Fiction coefficient of pin type cage is educed, as contact aea of olle and cage is limited. (3) Easy mounting/dismounting he pin type cage is povided with a tap hole fo lifting. he use of tap hole will facilitate the wok. Use ISO metic thead fo lifting tap scew. 7

9 3 eaing sevice life 3 eaing sevice life 3.1 eaing sevice life When beaings otate unde load, mateial flakes fom the sufaces of cone and cup o olling elements by fatigue aising fom epeated contact stess. his phenomenon is called flaking. he total numbe of beaing otations until flaking occus is egaded as the beaing "(fatigue) sevice life". "(Fatigue) sevice life" diffes geatly depending upon beaing stuctues, dimensions, mateials, and pocessing methods. Since this phenomenon esults fom fatigue distibution in beaing mateials themselves, diffeences in beaing sevice life should be statistically consideed. When a goup of identical beaings ae otated unde the same conditions, the total numbe of evolutions until 9 % of the beaings ae left without flaking (i.e. a sevice life of 9 % eliability) is defined as the basic ating life. In opeation at a constant speed, the basic ating life can be expessed in tems of time. 3.2 asic dynamic load atings asic dynamic load atings, C he basic dynamic load ating is eithe pue adial (fo adial beaings) o cental axial load (fo thust beaings) of constant magnitude in a constant diection, unde which the basic ating life of 1 million evolutions can be obtained, when the cone otates while the cup is stationay, o vice vesa. he basic dynamic load ating, which epesents the capacity of a beaing unde olling fatigue, is specified as the basic dynamic adial load ating (C) fo adial beaings, and basic dynamic axial load ating (Ca) fo thust beaings. hese load atings ae listed in the specification table. hese values ae pescibed by ISO 281/199, and ae subject to change by confomance to the latest ISO standads. 3.3 Calculation of sevice life Geneally, the elationship between the dynamic load ating, applied load and basic ating life of the beaing is expessed as follows : L1 = C P 1/3 (3.1) whee : L1 : basic ating life 1 6 evolutions C : basic dynamic load ating N P : dynamic equivalent adial (o axial) load N In case the beaing opeates at a constant speed, it is often convenient to expess the life in tems of hous which can be obtained by the following equation : L1h = whee : C P 1/ n L1h : life in tems of hous L1h = L1 16 6n C 1/3 1 = 6 P 6n C 1/ = P n n : otational speed (3.2) h min 1 Life calculation can be futhe simplified by the use of sevice life coefficient ( f h) and coefficient of otational speed (f n) as tabulated in ables 3.3 and 3.4. L1h = 5 f h 1/3 (3.3) f h = f n C P 33.3 f n = n (3.4) 3/1 (3.5) 8

10 3.4 Coection of basic dynamic load ating fo high tempeatue use and dimension stabilizing teatment In high tempeatue opeation, beaing mateial hadness deteioates, as mateial compositions ae alteed. As a esult, the basic dynamic load ating is diminished. Once alteed, mateial composition is not ecoveed, even if opeating tempeatues etun to nomal. heefoe, fo beaings used in high tempeatue opeation, the basic dynamic load ating should be coected by multiplying the basic dynamic load ating values specified in the beaing specification table by the tempeatue coefficient values in able 3.1. able 3.1 eaing tempeatue, C empeatue coefficient empeatue coefficient values Modified ating life Lnm he life of olling beaings was standadized as a basic ating life in the 196s, but in actual applications, sometimes the actual life and the basic ating life have been quite diffeent due to the lubication status and the influence of the usage envionment. o make the calculated life close to the actual life, a coected ating life has been consideed since the 198s. In this coected ating life, beaing chaacteistic facto a2 (a coection facto fo the case in which the chaacteistics elated to the life ae changed due to the beaing mateials, manufactuing pocess, and design) and usage condition facto a3 (a coection facto that takes into account usage conditions that have a diect influence on the beaing life, such as the lubication) o facto a23 fomed fom the intedependence of these two factos, ae consideed with the basic ating life. hese factos wee handled diffeently by each beaing manufactue, but they have been standadized as a modified ating life in ISO 281 in 27. In 213, JIS 1518 (dynamic load atings and ating life) was amended to confom to the ISO. he basic ating life (L1) shown in Equation (3.1) is the (fatigue) life with a dependability of 9 % unde nomal usage conditions fo olling beaings that have standad factos such as intenal design, mateials, and manufactuing quality. JIS 1518:213 specifies a calculation method based on ISO 281:27. o calculate accuate beaing life unde a vaiety of opeating conditions, it is necessay to conside elements such as the effect of changes in factos that can be anticipated when using diffeent eliabilities and system appoaches, and inteactions between factos. heefoe, the specified calculation method consides additional stess due to the lubication status, lubicant contamination, and fatigue load limit Cu (efe to p. 1) on the inside of the beaing. he life that uses this life modification facto aiso, which consides the above factos, is called modified ating life Lnm and is calculated with the following Equation (3.6). Lnm = a1 aiso L1 (3.6) In this equation, Lnm : modified ating life 1 6 otations his ating life has been modified fo one of o a combination of the following: eliability of 9 % o highe, fatigue load limit, special beaing chaacteistics, lubication contamination, and special opeating conditions. L1 : basic ating life 1 6 otations (eliability: 9 %) a1 : life modifi cation facto fo eliability efe to section (1) aiso : life modification facto efe to section (2) [Remak] When beaing dimensions ae to be selected given Lnm geate than 9 % in eliability, the stength of shaft and housing must be consideed. 9

11 3 eaing sevice life (1) Life modification facto fo eliability a1 he tem eliability is defined as fo a goup of appaently identical olling beaings, opeating unde the same conditions, the pecentage of the goup that is expected to attain o exceed a specified life in ISO 281:27. Values of a1 used to calculate a modified ating life with a eliability of 9 % o highe (a failue pobability of 1 % o less) ae shown in able 3.2. ype eaing eaing numbe (beaing dimensions) C, C Application otational speed, load, sealing pefomance usage tempeatue, kinematic viscosity of lubicating oil lubicating method, contamination paticles able 3.2 Life modification facto fo eliability a1 Fatigue load limit C u Viscosity atio κ Contamination facto e c Reliability, % Lnm a1 9 L 1m 1 95 L 5m L 4m L 3m L 2m L 1m L.8m L.6m L.4m L.2m L.1m L.8m L.6m L.5m.77 (Citation fom JIS 1518:213) (2) Life modification facto aiso a) System appoach he vaious influences on beaing life ae dependent on each othe. he system appoach of calculating the modified life has been evaluated as a pactical method fo detemining life modification facto aiso (ef. Fig. 3.1). Life modification facto aiso is calculated with the following equation. A diagam is available fo each beaing type (adial ball beaings, adial olle beaings, thust ball beaings, and thust olle beaings). (Each diagam (Fig. 3.2) is a citation fom JIS 1518:213.) Note that in pactical use, this is set so that life modification facto aiso 5. aiso = f ec Cu, P κ (3.7) aiso Life modification facto a ISO Fig. 3.1 System appoach κ = Fig eccu/p Life modification facto aiso (Radial olle beaings) (Fig. 3.2 Citation fom JIS 1518:213) b) Fatigue load limit Cu Fo egulated steel mateials o alloy steel that has equivalent quality, the fatigue life is unlimited so long as the load condition does not exceed a cetain value and so long as the lubication conditions, lubication cleanliness class, and othe opeating conditions ae favoable. Fo geneal high-quality mateials and beaings with high manufactuing quality, the fatigue stess limit is eached at a contact stess of appoximately 1.5 GPa between the aceway and olling elements. If one o both of the mateial quality and manufactuing quality ae low, the fatigue stess limit will also be low. he tem fatigue load limit Cu is defined as beaing load unde which the fatigue stess limit is just eached in the most heavily loaded aceway contact in ISO 281:27. and is affected by factos such as the beaing type, size, and mateial. Fo details on the fatigue load limits of special beaings and othe beaings not listed in this catalog, contact JEK. 1

12 c) Contamination facto ec If solid paticles in the contaminated lubicant ae caught between the aceway and the olling elements, indentations may fom on one o both of the aceway and the olling elements. hese indentations will lead to localized inceases in stess, which will decease the life. his decease in life attibutable to the contamination of the lubicant can be calculated fom the contamination level as contamination facto ec. Dpw shown in this table is the pitch diamete of ball/olle set, which is expessed simply as Dpw = (D + d)/2. (D: Outside diamete, d: oe diamete) Fo infomation such as details on special lubicating conditions o detailed investigations, contact JEK. able 3.3 Values of contamination facto ec Contamination level Extemely high cleanliness: he size of the paticles is appoximately equal to the thickness of the lubicant oil film, this is found in laboatoy-level envionments. High cleanliness: he oil has been fi lteed by an extemely fi ne filte, this is found with standad gease-packed beaings and sealed beaings. Dpw < 1 mm ec 1 1 Dpw 1 mm.8 to.6.9 to.8 Standad cleanliness: he oil has been fi lteed by a fine filte, this is found with standad gease-packed beaings and shielded beaings..6 to.5.8 to.6 Minimal contamination: he lubicant is slightly contaminated..5 to.3.6 to.4 Nomal contamination: his is found when no seal is used and a coase filte is used in an envionment in which wea debis and paticles fom the suounding aea penetate into the lubicant..3 to.1.4 to.2 High contamination: his is found when the suounding envionment is consideably contaminated and the beaing sealing is insuffi cient..1 to.1 to Extemely high contamination (able 3.3 Citation fom JIS 1518:213) d) Viscosity atio κ he lubicant foms an oil film on the olle contact suface, which sepaates the aceway and the olling elements. he status of the lubicant oil film is expessed by viscosity atio κ, the actual kinematic viscosity at the opeating tempeatue ν divided by the efeence kinematic viscosity ν1 as shown in the following equation. A κ geate than 4, equal to 4, o less than.1 is not applicable. Fo details on lubicants such as gease and lubicants with exteme pessue additives, contact JEK. ν 1, mm 2 /s n, min κ = ν ν1 (3.8) ν : Actual kinematic viscosity at the opeating tempeatue; the viscosity of the lubicant at the opeating tempeatue ν1 : Refeence kinematic viscosity; detemined accoding to the speed and pitch diamete of ball/olle set Dpw of the beaing (ef. Fig. 3.3) Fig D pw, mm Refeence kinematic viscosity ν1 (Fig. 3.3 Citation fom JIS 1518:213) 11

13 3 eaing sevice life able 3.4 Speed facto Rotational speed n (min 1 ) Coefficient of otational speed f n Rotational speed n (min 1 ) Coefficient of otational speed f n Rotational speed n (min 1 ) Coefficient of otational speed f n Rotational speed n (min 1 ) Coefficient of otational speed f n asic static load ating Excessive static load o impact load even at vey low otation causes patial pemanent defomation of the olling element and aceway contacting sufaces. his pemanent defomation inceases with the load; if it exceeds a cetain limit, smooth otation will be hindeed. he basic static load ating is the static load which esponds to the calculated contact stess shown below, at the contact cente between the aceway and olling elements which eceive the maximum load. *Rolle beaings 4 MPa he total extent of contact stess-caused pemanent defomation on sufaces of olling elements and aceway will 12 be appoximately. 1 times geate than the olling element diamete. he basic static load ating fo adial beaings is specified as the basic static adial load ating. his load atings ae listed in the beaing specification table, using C. his value is pescibed by ISO 78/1987 and is subject to change by confomance to the latest ISO standads. 3.7 Safety coefficient he allowable static equivalent load fo a beaing is detemined by the basic static load ating of the beaing; howeve, beaing sevice life, which is affected by pemanent defoma-

14 Sevice life coefficient f h L1 (1 6 ev.) L1h (h) Sevice life coefficient f h able 3.5 Life facto L1 (1 6 ev.) L1h (h) Sevice life coefficient f h L1 (1 6 ev.) L1h (h) tion, diffes in accodance with the pefomance equied of the beaing and opeating conditions. heefoe, a safety coefficient is designated, based on empiical data, so as to ensue safety in elation to basic static load ating. f s = C P (3.9) whee : f s : safety coeffi cient (ef. able 3.6) C : basic static load ating P : static equivalent load N N able 3.6 With beaing otation Without beaing otation occasional oscillation Values of safety coefficient f s Opeating condition all beaing f s (min.) Rolle beaing When high accuacy is equied 2 3 Nomal opeation When impact load is applied Nomal opeation.5 1 When impact load o uneven distibution load is applied 1 2 [Remak] Fo spheical thust olle beaings, f s 4. 13

15 4 Equivalent load 4 Equivalent load 4.1 Dynamic equivalent load eaings ae used unde vaious opeating conditions; howeve, in most cases, beaings eceive adial and axial load combined, while the load magnitude fluctuates duing opeation. heefoe, it is impossible to diectly compae the actual load and basic dynamic load ating. he two ae compaed by eplacing the loads applied to the shaft cente with one of a constant magnitude and in a specific diection, that yields the same beaing sevice life as unde actual load and otational speed. his theoetical load is efeed to as the dynamic equivalent load (P) Calculation of dynamic equivalent load ( When Fa/F e fo single-ow adial beaings, it is taken that X = 1, and Y =. Hence, the dynamic equivalent load ating is P = F. Values of e, which designates the limit of Fa/F, ae listed in the beaing specification table. ( Fo single-ow tapeed olle beaings, axial component foces (Fac) ae geneated as shown in Fig. 4.1, theefoe a pai of beaings is aanged face-to-face o back-to-back. he axial component foce can be calculated using the following equation. Fac = F 2 Y (4.2) Dynamic equivalent loads fo adial beaings and thust beaings (α 9º) which eceive a combined load of a constant magnitude in a specific diection can be calculated using the following equation, P = XF + YFa (4.1) α F ac F Load cente α F ac F Load cente whee : P : dynamic equivalent load fo adial beaings, P : dynamic equivalent adial load fo thust beaings, Pa : dynamic equivalent axial load F : adial load Fa : axial load X : adial load facto Y : axial load facto values of X and Y ae listed in the beaing specification table. N N N Fig. 4.1 Load cente position is listed in the beaing specification table. Axial component foce Fo instance, when adial loads FA and F ae on tapeed olle beaings A and as shown in able 4.1 and, in addition, a axial load Ka fom the outside is on beaing A, the dynamic equivalent loads PA and P on beaings A and ae as follows : able 4.1 Dynamic equivalent load calculation : when a pai of tapeed olle beaings is aanged face-to-face o back-to-back. Paied mounting ack-to-back aangement Face-to-face aangement Loading condition eaing Axial load Dynamic equivalent load A A F FA + Ka 2 Y 2 YA eaing A F 2 Y + Ka PA = XFA + YA eaing P = F F 2 Y + Ka PA = FA, whee PA < FA K a K a F A F F F A eaing A PA = FA F FA + Ka < 2 Y 2 YA eaing FA 2 YA Ka P = XF + Y FA 2 YA Ka P = F, whee P < F 14

16 4.2 Static equivalent load he static equivalent load is a theoetical load calculated such that, duing otation at vey low speed o when beaings ae stationay, the same contact stess as that imposed unde actual loading condition is geneated at the contact cente between aceway and olling element to which the maximum load is applied. Fo adial beaings, adial load passing though the beaing cente is used fo the calculation; fo thust beaings, axial load in a diection along the beaing axis is used. he static equivalent load can be calculated using the following equations. [Radial beaings] he geate value obtained by the following two equations is used. P = XF + YFa (4.3) P = F (4.4) whee : P : static equivalent adial load Pa : static equivalent axial load F : adial load Fa : axial load X : static adial load facto Y : static axial load facto values of X and Y ae listed in the beaing specification table. N N N N 15

17 5 eaing toleances 5 eaing toleances 5.1 ounday toleances fo tapeed olle beaings Koyo Inch Seies tapeed olle beaings ae manufactued to the five toleance levels ecognized by the ANSI/AMA, Classes 4, 2, 3, and, in ode to ascending pecision. Metic J seies Fo "J" pefix eaing No. tapeed olle beaings ae poduced in Classes PK, PN, PC and P, in accodance with industy standads. hese classes povide quality levels suitable fo all applications. he highe gades have educed unout toleances, poducing smoothe otation of the beaings with less noise and vibation. Impoved mounting fits ae also obtained because of close toleances on boe and outside diamete. oleances class4 to class and class PK to class P ae shown in able 5.1, 5.2. Koyo tapeed olle beaings may be supplied in any pecision desied. (1) Cone able 5.1 oleances and pemissible values fo Inch seies tapeed olle beaings Applied beaing type All types Cone boe d Single plane mean boe diamete deviation 3 dmp Class 4 Class 2 Class 3 Class Class ove up to uppe uppe uppe uppe uppe lowe lowe lowe lowe lowe mm inch mm inch μm inch μm inch μm inch μm inch μm inch (2) Cup Applied beaing type All types Cup outside diamete D Single plane mean outside diamete deviation 3 Dmp Class 4 Class 2 Class 3 Class Class ove up to uppe uppe uppe uppe uppe lowe lowe lowe lowe lowe mm inch mm inch μm inch μm inch μm inch μm inch μm inch (3) Assembled beaing width and oveall width Applied beaing type Single ow Double ow Cone boe d Cup OD D Actual beaing width deviation 3 s ove up to ove up to Class 4 Class 2 Class 3 Class, uppe lowe uppe lowe uppe lowe uppe lowe mm inch mm inch mm inch mm inch μm inch μm inch μm inch μm inch μm inch μm inch μm inch μm inch

18 (4) Radial unout of assmbled beaing cone / cup Applied beaing type All types Cup outside diamete D Assembled beaing unout Kia, Kea ove up to Class 4 Class 2 Class 3 Class Class max. max. max. max. max. mm inch mm inch μm inch μm inch μm inch μm inch μm inch able 5.2 oleances fo metic J seies tapeed olle beaing (1) oe diamete and width of cone and assembled width Unit : μm Cone oe Single plane mean boe diamete deviation 3 dmp Single cone width deviation 3 s Actual beaing width deviation 3 s d (mm) Class K Class N Class C Class Class K Class N Class C Class Class K Class N Class C Class ove up to uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe (2) Outside diamete and width of cup and adial unout of assembled beaing cone / cup Unit : μm Cup OD Single plane mean outside diamete deviation 3 Dmp Single cup width deviation 3 Cs Assembled beaing adial unout Kia, Kea D (mm) Class K Class N Class C Class Class K Class N Class C Class Class K Class N Class C Class ove up to uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe uppe lowe Kia max. Kea max. Kia max. Kea max. Kia max. Kea max. Kia max. Kea max

19 6 Numbeing system 6 Numbeing system he numbeing system of the inch seies tapeed olle beaings is specified by the AMA Standad as follows. his will povide a guideline fo identification of duty, angulaity and dimensions of the inch seies tapeed olle beaings. LM '' Modification (able 6.5) Pat No. (able 6.4) asic seies indicacion (able 6.3) Angulaity (able 6.2) Duty (able 6.1) able 6.1 Duty Inch seies tapeed olle beaings will be divided into ten classes accoding to thei duty as follows : Code EL LL L LM M HM H HH EH Details Exta Light Lighte than Light Light Light Medium Medium Heavy Medium Heavy Heavie than Heavy Exta Heavy hust only able 6.2 Angulaity he fist digit following the pefix lettes will indicate appoximately the included angle (α) of the oute ace o the cup angle accoding to the following code. Code Details 1 <α<24º 2 24º α< 25º º 3 α< 27º 4 27º α< 28º º 3 α< 3º 3 6 3º 3 <α<32º º 3 α< 36º 8 36º α< 45º 9 45º α, but not thust only hust beaing only able 6.3 asic seies indication he selection of the basic seies indication in elation to the maximum theoetical boe of the beaing will then be in accod with the following tabulation : Seies indication Max. boe ange (inch) to 19 incl. 1 2 to 99 incl. 1 2 to 29 incl. 39 to 129 incl to 189 incl to 239 incl to 289 incl to 339 incl to 389 incl to 429 incl. 8 9 able 6.4 Pat No. he 5th and 6th digits o the last two digits of the beaing numbe indicate the pat numbe of the individual membe of the beaing. eaing membe Cup : (Oute ing) Cone : (Inne ing) Code Expessed by 1 to 19, and 1 is used fo the cup of the minimum outside diamete of the seies. Expessed by 3 to 49, and 49 is used fo the cone of the maximum boe size of the seies. 18

20 able 6.5 Modification hese codes indicate the special design featues. Some examples ae; Code A R W CR CP D DA Details eaing limit fo oveall width o size in maste close then standad. Single cup with fl ange. Single o double cup o cone with snap ing. Single cup with fl ange and slotted. Rib cup. Chome plated cone and cup. Double cone o cup minimum length. Spheical O.D. double cup self-aligning 19

21 7 ypical applications 7 ypical applications Automotive *Font wheels In geneal, automotive font wheel beaings ae pimaily subjected to adial loads. Howeve, duing coneing o unning on bad oads, substantial moment loads can be imposed. heefoe, it is extemely impotant to select beaings which can absob these moment loads without difficulty. At the pesent time, two tapeed olle beaings ae geneally used in each font wheels of tucks. *Rea wheels apeed olle beaings ae geneally used in ea wheels of tucks and buses ove 2 tons in goss vehicle weight. Since the cone and cup can misalign duing coneing, which can have an advese affect on sevice life, beaings which offe supeio pefomance unde these conditions should be selected. *Diffeentials he beaings used in automotive diffeentials ae peloaded to maintain accuacy between the dive pinion and ing gea. he accuacy of gea engagement affects geatly the pefomance of the diffeential as well as unning noise. Fom this point of view, it is necessay to select beaings which will povide optimum igidity so that satisfactoy engagement of the geas is obtained duing opeation. he pinion shaft is suppoted by eithe two tapeed olle beaings (cantileve mount) mounted back to back, o two steep angle tapeed olle beaings plus a single cylindical olle beaing opposite the tapeed olle beaings (staddle mount). he diffeential ing gea is suppoted by tapeed olle beaings mounted face to face. 2

22 Geneal industies *Machine tool spindles apeed olle beaings ae widely used to suppot spindles of vaious machine tools such as engine lathes and milling machines. Since these spindles equie igidity and accuacy of guidance in both adial and axial diections, a pai of tapeed olle beaings ae usually mounted in a back-to-back aangement and adjusted to obtain the pope peload. In addition to poviding igid adial and axial suppot, tapeed olle beaings simplify the machine stuctue and pomote simple peload adjustment. *Electic ailway ca gea units he diving axles of electic cas ae equipped with geaing units to tansmit the toque and otation geneated by the taction main motos. In the paallel cadan gea units (cuently moe widely used than squae cadan gea units), both the pinion shaft and gea housing ae geneally fitted with tapeed olle beaings. *evel-gea units *Fam equipment, tansmission 21

23

24 Specification tables of tapeed olle beaings Single-ow INDEX S type SS type S type (Metic "J" seies) Double-ow DI type DIS type DI type DO DOS type NA type

25 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,43,45,47, ,51,53,55, 335S 49 57,59, A 43,47,51,53, , X A S A ,65 35A , A A 57,61,63,65 355X X A A S A A 59,65,67,69, 365S A S A S 65 37A ,67,71 375S A A A S 71 Seies No. Cone (Inne ing) A 67 Page Cup (Oute ing) Page A A 65,69,73,75 385AS S AX A X X A A AS S A AS S A 75 39A AS ,75, A 67,75,77,79, 395A S AS A AS ,51,53,57, A 45,53, X X X ,53,59,61, A 49,57,61,63, S

26 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page S A 61,63,67, X 61,65,67,71, 458S , A A S ,79,81 475X A 73,77,79,81, A X 79, S ,83 482A X A A 83,85,87,89 495AS ,87,89,91 495AX S X AS X A A 89 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,61,63,65, 525A 57 67,69 525X A S A X , A X 57,59,61,67, ,71 539A A A 71,75 555S SA X 71,75,77,79, 557A S A S ,81,83,85 565S S A S R 575R ,85,87,89 575SR X R R 85 25

27 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page 575R 578R 87 58R R R A A 87,89, XE 85,91,93 593A XS S X A A S X X A X ,63,67,71, ,75 618X A 57,63,67,71, S X A X A , ,77,79,81, , A 83, , ,83,85,87, , X Seies No. Cone (Inne ing) A A 91 Page Cup (Oute ing) Page ,93, SA A R 74R ,83,85,87, 744AR R AR SR SR R SR AR R SR 89 75AR 89 75R , ,87,89,91, 756A A 85, ,93, ,

28 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page 835R 835R ,87,89,91 838XR R R 91 85AR R 855R ,89,91,93, 857R XR X 91 86R R R R XR R XR XR R AR XR R , S , , X 39, , R 1975R , R R R R XR XR 43 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page A2 A A A A A ,47, S ,41,43, X X X X 45 27R 2776R R , R X R AR X 49,51,53,55, 2788R R R R R R ,51, , ,63,

29 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,43,45,47, S X X ,47, S , , , ,49,51,53, X X 53 35R 3576R ,59,61, R ,59, AR R R R R R R R R 65 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,63,65,67, ,65,67,69, ,65, A , A ,55, A ,77,79, A4 A A A45 39 A ,57,59,61, ,69, R 5552R R ,67,71,73, 5557R 81 75,77,79, R 75 28

30 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page 55R 5561R R R R R R R R R R R , A6 A A A A A ,75,77,79, A ,79,83, A R 6552R XR R X R ,87,89,91, 6555R R R R R R 87 Seies No. Cone (Inne ing) 65R 6578R R XR 93 Page Cup (Oute ing) Page , R 9278R , R 17 93R 9378R R R R ,45, A ,47,51, ,47, , X S 41 71SA , X X X 39 11R 11157R ,59, XR R UR 59 29

31 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page 11R 11163R XR XSR LM117R LM11749R 39 LM LM119 LM LM M126 M M M12648A 41 M LM127 LM LM , , , A A 45,47,49, , A A A A A A , , ,43,45, R X Seies No. Cone (Inne ing) Page Cup (Oute ing) Page , X , ,51,53, , X S R 1758R , , R 19138R , R X R , , L215 L L , R 2478R R

32 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page , , , R 25877R R , R ,43,45, S S R 26877R ,59, R R , R A R R R R R ,85,87, , , ,55, Seies No. Cone (Inne ing) Page Cup (Oute ing) Page 285R 28576R R ,67,69, R R , X , A , , ,83, LM297 LM LM LM LM ,51, ,81, ,69,

33 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,85, A , M385 M M ,75,79, , ,85, X Seies No. Cone (Inne ing) Page Cup (Oute ing) Page L446R L4464R 41 L ,43 L44643R 41 L44645R 43 L44649R , ,69,71, L454 L L ,57,61, , R 4678R AR R R R 47487R , R R 47675R ,87, R A 83,85,87, R R R R R R R R 4788R ,91, R R R , LM485 LM LM

34 Seies No. Cone (Inne ing) Page Cup (Oute ing) Page ,61, ,67, , X , X , CR 55175CR , CR CR CR R 56418R R ,63,67, R 64433R R ,73,75, Seies No. Cone (Inne ing) A 77 Page Cup (Oute ing) Page ,63, R 66187R ,69,75 662R , R R ,73,75, LM67 LM LM671 43,47 LM L681 L ,53 L L X , C 722C C C 15 LM728 LM LM

35 Seies No. INDEX Single-ow Seies No. Cone (Inne ing) Page Cup (Oute ing) Page X 15 LM783 LM LM HM816 HM HM M842 M M M866R M86643R 43 M ,45,47 M86647R 43 M86648R 47 M86649R 45 M88 M884 43,45 M881 43,45,47,49 M M M M HM885 HM HM HM HM HM886 HM HM ,47,49,51, HM HM ,49 HM HM HM HM HM894 HM HM HM HM ,51,53 HM HM HM , ,89,91, X L128 L L LM129 LM LM LM149 LM LM L1834 L L HM212 HM HM ,79,81 HM HM HM HM Seies No. Cone (Inne ing) Page Cup (Oute ing) Page L2178 L L L HM2182 HM HM HM221 HM HM HH2214 HH HH ,91,93,95 HH HH HH HH HH HH HH HH HH2243 HH HH ,95,97 HH HH HH HH HH M2247 M M LL2257 LL LL L2258 L L L HH2283 HH HH ,99 HH EE EE EE LM2458 LM LM LM LM M2469 M M M M M M2497 M M ,11 M M M M M2727 M M M2764 M M L356R L35649R 67 L L3192 L L L LL3193 LL LL L3272 L L