NIKO 1. 2. 3. 4...... Technical Infomation eaing mateials Shiels an seals eaing toleances eaing fits eaing intenal cleaance Lubication Loa ating an life eaing hanling Allowable spee Pages fo efe ~ ~ ~1 1~ ~ ~1 1 1~
NIKO Pouct Infomation Seies eep Goove all eaings..,..ll,..zz 2 Seies eep Goove all eaings 2.., 2..LL, 2..ZZ 3 Seies eep Goove all eaings 3.., 3..LL, 3..ZZ 1 Seies eep Goove all eaings 1.. Seies eep Goove all eaings..,..ll,..zz Seies eep Goove all eaings..,..ll,..zz 22 Seies eep Goove all eaings 22.., 22..2S Seies eep Goove all eaings..,..2s 3 Seies eep Goove all eaings 3.., 3..2S 4 Seies eep Goove all eaings 4.. 2 Seies oubleow Angula Contact all eaings 2.., 2..2S 3 Seies oubleow Angula Contact all eaings 3.., 3..2S Seies Selfaligning all eaings..,..k Seies Selfaligning all eaings..,..k 22 Seies Selfaligning all eaings 22.., 22..K, 22..2S Seies Selfaligning all eaings..,..k,..2s Pages fo efe 22~4 22~ ~ 2~2 2 2~3 31~32 33 34 3 3~3 3~4 41 42 43~44 4~4
NIKO 1. eaing mateials aceway an olling element mateials.1 High/mi cabon alloy steel In geneal,steel vaieties which can be haene not just on the suface but also eep haene by the socalle "though haening metho" ae use fo the aceways an olling elements of beaings. Foemost among these is high cabon chomium beaing steel, which is wiely use..2 Micabon chomium steel Micabon chomium steel incopoating silicone an manganese, which gives it haening popeties compaable to high cabon chomium steel. 1.2 Cage mateials eaing cage mateials must have the stength to withstan otational vibations an shock loas. These mateials must also have a low fiction coefficient, be light weight, an be able to withstan beaing opeation tempeatues. 1.2.1 Pesse cages Fo small an meium size beaings, pesse cages of col o hot olle steel with a low cabon content of appox..1% ae use. Howeve, epening on the application, austenitic stainless steel is also use. 1.2.2 Plastic cages Injection mole plastic cages ae now wiely use: most ae mae fom fibe glass einfoce heat esistant polyamie esin. Plastic cages ae light weight, coosion esistant an have excellent ampening an sliing popeties. Heat esistant polyamie esins now enable the pouction of cages that pefom well in applications anging between 4 C C. Howeve, they ae not ecoene fo use at tempeatues exceeing C. 2. Extenal beaing sealing evices Extenal seals have two main functions: to pevent lubicating oil fom leaking out, an, to pevent ust,wate, an othe contaminants fom enteing the beaing. When selecting a seal, the following factos nee to be taken into consieation: the type of lubicant(oil o gease), seal peipheal spee, shaft fitting eos, space limitations, seal fiction an esultant heat incease, an cost. Sealing evices fo olling beaings fall into two main ifications: noncontact seals an contact seals. 2.1 Noncontact seals: Noncontact seals utilize a small cleaance between the shaft an the housing cove. Theef oe fiction is negligible,making them suitable fohigh spee applications. In oe to impove sealing capability, cleaance spaces ae often fille with lubicant. 2.2 Contact seals: Contact seals accomplish thei sealing action though the contact pessue of a esilient the seal ( the lip is often mae of synthetic ubbe ) the sealing suface. Contact seals ae geneally fa supeio to noncontact seals in sealing efficieny, although thei fiction toque an tempeatue ise coefficients ae highe. Futhemoe, because the potion of a contact seal otates while in contact wi the shaft,the allowable seal peipheal spee vaie epening on seal type.
NIKO 3. all beaing toleances 3.1 Stana of toleances all beaing "toleances"o imensional accuacy an unning accuacy, ae egulate by ISO an JIS stanas (olling beaing toleances). Fo imensional accuacy, these stanas pescibe the toleances necessay when installing beaings on shafts o in housings.unning accuacy is efine as the allowable limits fo beaing unout uing opeation. Table 3.1 Compaison of toleance ifications of national stanas Japanese inustial stana (JIS) Stana Toleance JIS,X 4 2 Intenational Oganization fo Stanaization (ISO) ISO Nomal Class X Class Class Class 4 Class 2 eutsches Institut fu Nomung(ISO) IN P P P P4 P2 Ameican National Stanas Institute (ANSI) ANSI/AMA AEC1 AEC3 AEC AEC AEC 3.2 Toleances fo aial beaings Table 3.2 Inne ings (Unit : m) Nominal boe iamete ove 1 1 3 incl. 1 3 high low Single plane mean boe iamete eviation 1 2 high low 1 high low mp 1 4 high low 4 2 high low 1 1 2. 2. 2. 4.. 1 Single aial plane boe iamete vaiation iamete seies 4 max. 1 1 4 2 2. 2. 2. 4.. Vp maxiamete seies.1 4 1 1 max. 4 3 4 2 2. 2. 2. 4.. Table 3.3 Inne ings Nominal boe iamete ove 1 1 3 incl. 1 3 Single aial plane boe iamete vaiation Vp maxiamete seies 2,3,4 4 2 max. 4 3 2. 4 2. 2. 4.. Mean single plane boe iamete vaiation Vmp Inne ing aial unout 4 2 4 2 4 max. max. max. 3 3 4 2. 2. 3. 3. 4. 2. 2. 1 2 1 1 Kia 4 4 2. 3. 4. 4.. 2. 2. 2. 2. Face unout with boe S..... 3. 4. 4... 2 2.
NIKO Table 3.4 Inne ings Nominal boe iamete ove 1 1 3 incl. 1 3 Inne ing axial Inne ing with eviation unout (with sie) Sia 2 s 3 nomal moifie 4 3 4 4 2 2. 2. 2. 2., high low 2,4 2 2 2,,4 high low high low high low high low 3 3 3 3 Inne ing with vaietion Note: 1 The imensional iffeence s of boe iamete to applie fo 4 an 2 is the same as the toleance of imentional iffeence mp of aveage boe iamete. Howeve, the imensional iffeence is applie to iamete seies, 1, 2, 3 an 4 against Class 4, an to all the iamete seies against Class 2. 2 3 To be applie fo eep goove ball beaing an angula contact ball beaings. To be applie fo iniviual aceway ings manufactue fo combine beaing use. 2 2 2 2 2 2 Vs max. 4 2. 2. 3. 4. 4. 2 2. Table 3. Oute ings Nominal Outsie Single plane mean outsie iamete eviation iamete mp ove 1 3 1 incl. 1 3 1 high low 1 3 high low 1 2 high low 1 4 high low 4 1 2 high low 2. 4. 4. 4..... 1 1 31 3 Single aial plane outsie iamete vaiation (Unit : m) Vp iamete seies maxiamete seies.1 max. 4 2 max. 4 2 4 2. 4 3 2. 1 4. 4 4. 4. 4. 4. 4. 1 1. 1... 1. 31 1.. 3. Table 3. Oute ings Nominal Outsie iamete ove incl. 1 Single aial plane outsie iamete vaiation Vp maxiamete seies 2.3.4 4 max. 4 3 2 2. Single aial plane outsie iamete vaiation Vp cappe beaings iamete seies 2,3,4,1,2,3,4 max. 1 Mean single plane outsie iamete vaiation Vmp max. 3 4 2. 2 1 3 4 4. 1 3 2. 2. 3 4. 1 4 3. 2. 1 4. 2 1 1 3. 2. 1. 2 2 1 4. 2.. 3. 2. 1 1. 3 3. 3. 1.. 4.
NIKO Table 3. Oute ings Nominal Outsie iamete Oute ing aial unout Kea Outsie suface inclination S Outsie ing axial unout Sea Oute ing with eviation cs Oute ing with vaiation Vcs ove incl. 1 1 3 3 2 1 4 max. 3 4 2 2. 2. 4. 4 max. 4 4 4 4 2 1 4 max. 2 2. 2. 4. all type Ientical to s of inne ing of same beaing, Ientical to s an Vbs of inne ing of same beaing 4 max. 2. 2. 2. 3. 2 1 1. 2.. 4. 2. 4 2. 1 2... 2. 1 4. 1 2... 2. 1 1. 4. 1. 1. 4. Note: The imensional iffeence s of oute iamete to be applie fo es 4 an 2 is the same as the toleance of imensional iffeence mp of aveage oute iamete. Howeve,the imensional iffeence is applie to iamete seies,1.2.3 an 4 against Class 4, an also to all the iamete seies against Cfass 2. To be applie in case snap ings ae not installe on the beaings. To be applie fo eep Goove all eaings an Angula Contact all eaings. 4. eaing fits 4.1 Intefeence Fo olling beaings, inne an oute ings ae fixe on the shaft o in the housing so that elative movement oes not occu between fitte sufaces uing opeation o une loa. This elative movement (efee to as "ceep") between the fitte sufaces of the beaing an the shaft o housing can occu in a aial iection, an axial iection, o in the iection of otation. To help pevent this ceeping movement, beaing ings an the shaft o housing ae installe with one of thee intefeence fits, a "tight fit" (also calle shink fit), "tansition fit," o "loose fit" (also calle cleaance fit), an the egee of intefeence between thei fitte sufaces vaies. The most effective way to fix the fitte sufaces between a beaing's aceway an shaft o housing is to apply a "tight fit." The avantage of this tight fit fo thin walle beaings is that it povies unifom loa suppot ove the entie ing cicumfeence without any loss of loa caying capacity. Howeve, with a tight fit, ease of installation an isassembly is lost; An when using a nonsepaable beaing as the floatingsie beaing, axial isplacement is not possible. Fo this eason, a tight fit cannot be ecoene in all cases. 4.2 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 in selecting a pope fit. Some of the negative conitions cause by impope fit ae liste below. aceway cacking, ealy peeling an isplacement of aceway aceway an shaft o housing abasion cause by ceeping an fetting coosion Seizing cause by loss of intenal cleaances Incease noise an lowee otational accuacy ue to aceway goove efomation
NIKO 4.3 Fit selection Selection of a pope fit is epenent upon thoough analysis of beaing opeating conitions, incluing consieation of: Shaft an housing mateial, wall thickness, finishe suface accuacy, etc. Machiney opeating conitions ( natue an magnitue of loa, otational spee, tempeatue, etc.) 4.3.1 "Tight fit," "tansition fit," o "loose fit" Fo aceways une otating loas, a tight fit is necessay. (efe to Table 4.1) "aceways une otating loas" efes to aceways eceiving loas otating elative to thei aial iection. Fo aceways une static loas, on the othe han, a loose fit is sufficient. (Example) otating inne ing loa the iection of the aial loa on the inne ing is otating elatively. Fo nonsepaable beaings, such as eep Goove all eaings, it is geneally ecoene that eithe the inne ing o oute ing be given a loose fit. Table 4.1 aial loa an beaing Illustation eaing otation ing loa Fit Static loa Inne ing: otating Oute ing: Stationay otating inne ing loa Inne ing: Tight fit Unbalance loa Inne ing: Stationay Oute ing: otating Static oute ing loa Oute ing: Loose fit Static loa Inne ing: Stationay Oute ing: otating Static inne ing loa Inne ing: Loose fit Unbalance loa Inne ing: otating Oute ing: Stationay otating oute ing loa Oute ing: Tight fit 1
NIKO. all beaing intenal cleaance all beaing intenal cleaance (initial cleaance) is the amount of intenal cleaance a beaing has befoe being installe on a shaft o in a housing. The intenal cleaance valves fo NIKO ball beaing es ae shown in tables.1 to. Table.1 aial intenal cleaance of eep Goove all eaings (Unit : m) Nominal boe iamete () C2 CN C3 C4 C ove incl. min. max. min. max. min. max. min. max. min. max. 1 2 2 2 3 1 1 3 1 1 33 4 1 1 2 2 2 3 2 4 3 1 2 2 41 3 3 3 4 1 2 33 2 4 4 4 4 1 1 3 3 1 4 3 1 2 43 3 1 1 1 3 1 4 1 1 1 1 3 3 3 4 1 2 2 41 3 1 Table.2 aial intenal cleaance fo Selfaligning all eaings (fo beaing with cylinical boe) (Unit : m) Nominal boe iamete eaing with cylinical boe () C2 Nomal C3 C4 ove incl. min. max. min. max. min. max. min. max. 1 2 33 1 2 1 2 21 1 3 21 2 3 1 4 1 3 3 3 1 2 4 3 4 1 2 4 34 3 4 31 44 3 21 1 3 3 4 1 4 4 3
NIKO Table.3 aial intenal cleaance fo Selfaligning all eaings (fo beaing with tapee boe) (Unit : m) Nominal boe iamete eaing with tapee boe () C2 Nomal C3 C4 ove incl. min. max. min. max. min. max. min. max. 1 1 1 1 2 2 33 2 42 3 2 2 3 33 3 4 2 4 4 4 2 22 3 33 2 4 1 32 2 4 41 1 3 Table.4 aial intenal cleaance of ouble ow Angula Contact all eaings (Unit : m) Nominal boe iamete () C2 Nomal C3 C4 ove incl. min. max. min. max. min. max. min. max. 1 22 22 3 1 1 3 4 1 3 1 2 2 32 4 3 4 Table. aial intenal cleaance of beaings fo electic moto (Unit : m) Nominal boe iamete () ove incl. 1(incl.) 1 1 3 3 4 4 aial intenal cleaance CM eep goove ball beaings min. max. 4 22 22. Lubication.1 Lubication of olling 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 oil (o gease) film on the contact sufaces. Howeve, fo olling beaings, lubication has the following avantages:
NIKO (1) Fiction an wea euction (2) Fiction heat issipation (3) Polonge beaing life (4) Pevention of ust () Potection against hamful elements In oe to achieve the above effects, the most effective lubication metho fo the opeating conitions must be selecte. Also a goo quality, eliable lubicant must be selecte. In aition, an effectively esigne sealing system that pevents the intusion of amaging elements ( ust, wate, etc. ) into the beaing inteio, emoves othe impuities fom the lubicant, an pevents lubicant fom leaking to the outsie, is also a equiement. Almost all olling beaings use eithe gease o oil lubication methos, but in some special applicatic soli lubicant such as molybenum isulfie o gaphite may be use..2 Gease lubication Gease type lubicants ae elatively easy to hanle equie only the simplest sealing evicesfo these easons, gease is the most wiely use lubicant olling beaings..2.1 Types an chaacteistics of gease Lubicating gease ae compose of eithe a mineal base o a synthetic oil base. To this base a thicks othe aitives ae ae. The popeties of all geases ae mainly etemine by the kin of base oil use the combination of thickening agent an vaious aitives. Stana geases an thei chaacteistics ae Table.2. As pefomance chaacteistics of even same type of gease will vay wiely fom ban, it is best to check the manufactues' ata when selecting a gease. Table.1 Gease vaieties an chaacteistics Gease name Lithium gease Soium gease (Fibe gease) Thickene Li soap Na soap ase oil Mineal oil opping poin C ~ Opeating 3 ~ + tempeatue ange C Mechanical stability Excellent Pessue esistance Goo Wate esistance Goo Wiest ange of applications. Applications Gease use in all types of olling beaings. ieste oil ~ ~ + Goo Goo Goo Excellent low tempeatue an wea chaacteistics. Suitable fo small size an miniatue beaings. Silicone oil 2 ~ ~ +1 Goo poo Goo Suitable fo high an low tempeatues. Unsuitable fo heavy loa applications ue to low oil film stength. Mineal oil ~ 1 2 ~ + Excellent ~ Goo Goo Goo ~ poo Some emulsification when wate is intouce. Excellent chaacteistics at elatively high tempeatues. Calcium compoun base gease Ca+Na soap Ca+Li soap Mineal oil ~ 1 2 ~ + Excellent ~ Goo Excellent ~ Goo Goo ~ poo Excellent pessue esistance an mechanical stability. Suitable fo beaings eceiving shock loas.
NIKO Gease name Thickene ase oil Mineal oil opping poin C ~ Opeating 1 ~ + tempeatue ange C Mechanical stability Goo ~ poo Pessue esistance Goo Wate esistance Goo Excellent viscosity chaacteistics. Applications Aluminum gease Al soap Suitable fo beaings subjecte to vibations. Nonsoap base gease Thickene entone, silica gel, uea, cabon black, fluoine compouns, etc. Mineal oil Synthetic oil o above o above 1 ~ + Goo Goo ~ +2 Goo Goo Goo Goo Can be use in a wie ange of low to high tempeatues. Shows excellent heat esistance, col esistance, chemical esistance, an othe chaacteistics when matche with a suitable base oil an thickene. Gease use in all types of oiling beaings.. Loa ating an life.1 eaing life Even in beaings opeating une nomal conitions, the sufaces of the aceway an olling elements ae constantly being subjecte to epeate compessive stesses which causes flaking of these sufaces to occu. This flaking is ue to mateial fatigue an will eventually cause the beaings to fail. The effective life of a beaing is usually efine in tems of the total numbe of evolutions a beaing can unego befoe flaking of eithe the aceway suface o the olling element sufaces occus. Othe causes of beaing failue ae often attibute to poblems such as seizing, abasions, cacking, chipping, gnawing, ust, etc. Howeve, these so calle "causes" of beaing failue ae usually themselves cause by impope installation, insufficient o impope lubication, faulty sealing o inaccuate beaing selection. Since the above mentione "causes" of beaing failue can be avoie by taking the pope pecautions,an ae not simply cause by mateial fatigue, they ae consiee sepaately fom the flaking aspect..2 asic ating life an basic ynamic loa ating A goup of seemingly ientical beaings when subjecte to ientical loa an opeating conitions will exhibit a wie ivesity in thei uability. This " life " ispaity can be accounte fo by the iffeence in the fatigue of the beaing mateial itself. This ispaity is consiee statistically when calculating beaing life, an the basic ating life is efine as follows. The basic ating life is base on a % statistical moel which is expesse as the total numbe of evolutions % of the beaings in an ientical goup of beaings subjecte to ientical opeating conitions will attain o supass befoe flaking ue to mateial fatigue occus. Fo beaings opeating at fixe constant spees, the basic ating life (% eliability) is expesse in the total numbe of hous of opeation.
NIKO The basic ynamic loa ating is an expession of the loa capacity of a beaing base on a constant loa which the beaing can sustain fo one million evolutions (the basic life ating). Fo aial beaings this ating applies to pue aial loas, an fo thust beaings it efes to pue axial loas. The basic ynamic loa atings given in the beaing tables of this catalog ae fo beaings constucte of NIKO stana beaing mateials, using stana manufactuing techniques. Please consult NIKO engineeing fo basic loa atings of beaings constucte of special mateialso using special manufactuing techniques. The elationship between the basic ating life, the basic ynamic loa ating an the beaing loa is given in fomula (.1). all beaings =( C P L1 )...(.1) P whee, P = 3... Fo ball beaings L1 : asic ating life 1 evolutions C : asic ynamic ating loa, n ( C: aial beaings) P : Equivalent ynamic loa, n ( P: aial beaings) The basic ating life can also be expesse in tems of hous of opeation (evolution), an is calculate as shown in fomula (.2). p L1h = fh...(.2) fh f n C P = fn...(.3) =( 1/p )...(.4) whee, L1 : : : f h f n n : 33.3 n asic ating life, Life facto Spee facto otational spee, /min h Fomula (.2) can also be expesse as shown in fomula (.). L1h = 1 n C P P ( )...(.) n /min 3.2..1 2.. 1.1.1 4.2 3.22. 2.2.2 1.4 4 3. 2 1... 4 3 2 1.2 1.3 1.4 1 1.4 Fig..1 fn L 1h n 4 3 2 1 f h.4 4. 4 3. 3 2. 4 2 1. 3 1. 1. 2 1. 1.4 1.3 1 1.2 4.. 3... 2.4 eaing life ating scale The elationship between otational spee n an spee facto fn as well as the elation between the basic ating life L1h an the life facto fn is shown in Fig..1. When seveal beaings ae incopoate in machines o equipment as complete units, all the beaings in the unit ae consiee as a whole when computing beaing life (see fomula.). The total beaing life of the unit is a life ating base on the viable lifetime of the unit befoe even one of the beaings fails ue to olling contact fatigue. L = 1 ( 1 L e + 1 +... 1 ) 1/e 1 L e 2 L e n...(.)
NIKO whee, e = 1/...Fo ball beaings L= Total basic ating life o entie unit, h L1,L2...Ln : asic ating life o iniviual beaings, 1, 2,... n, h When the loa conitions vay at egula intevals, the life can be given by fomula (.). 1 Lm = ( j / Lj )...(.) whee, j : Fequency of iniviual loa conitions Lj : Life une iniviual conitions.3 Machine applications an equisite life When selecting a beaing, it is essential that the equisite life of the beaing be establishe in elation to the opeating conitions.the equisite life of the beaing is usually etemine by the type of machine in which the beaing will be use, an uation of sevice an opeational eliability equiements. When etemining beaing size, the fatigue life of the beaing is an impotant facto; howeve, besies beaing life, the stength an igiity of the shaft an housing must also be taken into consieation..4 Ajuste life ating facto The basic beaing life ating (% eliability facto) can be calculate though the fomulas mentione ealie in Section.2. Howeve, in some applications a beaing fife facto of ove % eliability may be equie. To meet these equi ements, beaing life can be lengthene by the use of specially impove beaing mateials o special constuction techniques. 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 when calculating beaing life, the ajuste beaing life can be etemine. Lna =a1.a2.a3. (C/P) P...(.) whee, Lna : Ajuste life ating in millions of evolutions (1)(ajuste fo eliability, mateial an opeating conitions) a1 : eliability ajustment facto a2 : Mateial ajustment facto a3 : Opeating conition ajustment facto.4.1 Life ajustment facto fo eliability a1 The values fo the eliability ajustment facto ai (fo a eliability facto highe than %) can be foun in Table.1 Table.1 eliability ajustment facto values eliability % Ln eliability facto a1 a 1 L1 L L4 L3 L2 L1 2.3.44 3.21 1
NIKO.4.2 Life ajustment facto fo mateial a2 The life of a beaing is affecte by the mateial type an quality as well as the manufactuing pocess.in this ega, the life is ajuste by the use of an a facto. The basic ynamic loa atings liste in the catalog ae base on NIKO's stana mateial an pocess, theefoe, the ajustment facto a2 =1. When special mateials o pocesses ae use the ajustment facto can be lage than 1. NIKO beaings can geneally be use up to C. If beaings ae opeate at a highe tempeatue, the beaing must be specially heat teate ( stabilize ) so that inamissible imensional change oes not occu ue to changes in the micostuctue. This special heat teatment might cause the euction of beaing life because of a haness change..4.3 Life ajustment facto a3 fo opeating conitions The opeating conitions life ajustment facto a3 is use to ajust fo such conitions as lubication, opeating tempeatue, an othe opeation factos which have an effect on beaing life. Geneally speaking, when lubicating conitions ae satisfactoy, the a3 facto has a value of one; an when lubicating conitions ae exceptionally favoable, an all othe opeating conitions ae nomal, as can have a value geate than one. Howeve, when lubicating conitions ae paticulaly unfavoable an the oil film fomation on the contact sufaces of the aceway an olling elements is insufficient, the value of a3 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 (below 2 /s fo ball beaings o by exceptionally low otational spee (n/min x p less than 1,). Fo beaings use une special opeating conitions, please consult NIKO engineeing. 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 Fig..2.. asic static loa ating When stationay olling beaings ae subjecte to static loas, they suffe fom patial pemanent efomation of the contact sufaces at the contact point between the olling elements an the aceway. The amount of efomity inceases as the loa inceases, an if this incease in loa excees cetain limits, the subsequent smooth opeation of the beaings is impaie. Life ajustment value a3..4.2 1 2 3 Opeating tempeatue c Fig..2 Life ajustment value fo opeating tempeatue It has been foun though expeience that a pemanent efomity of.1 times the iamete of the olling element, occuing at the most heavily stesse contact point between the aceway an the olling elements, can be toleate without any impaiment in unning efficiency. The basic ating static loa efes to a fixe static loa limit at which a specifie amount of pemanent efomation occus. It applies to pue aial loas fo aial beaings an to pue axial loas fo thust beaings. The maximum applie loa values fo contact stess occuing at the olling element an aceway contact points ae given below. 2
NIKO Fo ball beaings (except Selfaligning all eaings) Fo Selfaligning all eaings 4,2 Mpa 4, Mpa. Allowable static equivalent loa Geneally the static equivalent loa which can be pemitte is limite by the basic static loa ating Howeve, epening on equiements egaing fiction an smooth opeation, these limits may be geate o lesse than the basic static ating loa In the following fomula (3.) an Table.3 the safety facto So can be etemine consieing the maximum static equivalent loa. So = Co/Po... (3.) whee, So : Safety facto Co : asic static ating loa, N (aial beaings: Co) Po max : Maximum static equivalent loa, N (aial: Po max). Table.3 Minimum safety facto values So Opeating conitions High otational accuacy eman Nomal otating accuacy eman (Univesal application) Slight otational accuacy eteioation pemitte (Low spee, heavy loaing, etc.) all eaings 2 1.. eaing hanling eaing stoage Most olling beaings ae coate with a ust peventative befoe being packe an shippe, an they shoul be stoe at oom tempeatue with a elative humiity of less than %.. Allowable spee As beaing spee inceases, the tempeatue of the beaing also inceases ue to fiction heat geneate in the beaing inteio. If the tempeatue continues to ise an excees cetain limits, the efficiency of the lubicant stat to fail own astically, an the beaing can no longecontinue to opeate in a stable manne. Theefoe, the maximum spee at which it is possible fo the beaing to continuously opeate without the geneation of excessive heat beyon specifie limits, is calle the allowable spee ( /min ). The allowable spee of a beaing epens on the type of beaing, beaing imensions, type of cage, loa, lubicating conitions, an cooling conitions. The allowable spees liste in the beaing tables fo gease an oil lubication ae fo stana NIKO beaings une nomal opeating conitions, coectly installe, using the suitable lubicants with aequate supply an pope maintenance. Moeove, these values ae base on nomal loa conitions (P.C, Fa/F ). Fo ball beaings with contact seals (LLU type), the allowable spee is etemine by the peipheal lip spee of the seal. 1
NIKO Fo beaings to be use une heavie than nomal loa conitions, the allowable spee values liste in the beaing tables must be multiplie by an ajustment facto. The ajustment factos an fc ae given in Figs..1 an.2. f L Also, when aial beaings ae mounte on vetical shafts, lubicant etentions an cage guiance ae not favoable compae to hoizontal shaft mounting. Theefoe, the allowable spee shoul be euce to appoximately % of the liste spee. It is possible to opeate pecision beaings with high spee specification cages at spees highe than those liste in the beaing tables, if special pecautions ae taken. These pecautions shoul inclue the use of foce oil ciculation methos such as oil jet o oil mist lubication. Une such high spee opeating conitions, when special cae is taken, the stana allowable spees given in the beaing tables can be ajuste upwa. The maximum spee ajustment values, /, by which the beaing table spees can be multiplie, ae shown in Table.1. Howeve, fo any application equiing spees in excess of the stana allowable spee, please consult NIKO Engineeing. Fig..1 Value of ajustment facto FL epens on beaing loa Fig..2 Value of ajustment facto Fc epens on combine loa...... Angula contact ball beaings eep goove ball beaings Cylinical olle beaings Tapee olle beaings ( Fa/F 2e ). 1.. 2. Table.1 Ajustment facto, f, fo allowable numbe of evolutions Type of beaing eep goove ball beaings Angula contact ball beaings Ajustment facto f 3. 2.
NIKO 1 2 3 4 4 1 2 2 32 42 4 2 1 1 1 1 1 1 1 1 2 2 22 22 4 1 4 2 1 1 21 21 2 3 3 4 4 3 3 1 1 1 2 2 2 31 3 4 43 4 4 4 2 2 22 2 1 1 2 4 1 3 4 4 42 34 3 2 21 1 3 1 2 3 1 2 3 4 1 1 1 2..... 3. 3. 4 4.. 2.. 2.. 2.. 2... 1... 2. 32. 3. 42. 4.. 2.. 4. 3.. 3.. 1.. 3....21.3.3.......21.4.421 4 4.4. 2 Mass (appox.) kg asic loa atings ounay imensions ynamic static C Co N Limiting spees pm eaing numbes s Abutment an fillet imensions h h s 22 all eaing seies gease oil s min 1) min max max
all eaing seies..ll,..zz asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes Mass (appox.) kg s 1 2 3 4 4 1 2 2 32 42 4 2 1 1 1 1 1 1 1 1 2 2 22 22 4 1 4 2 1 1 21 21 2 3 3 4 4 3 3 1 1 1 2 2 2 31 3 4 43 4 4 4 2 2 22 2 1 1 2 4 1 3 4 4 42 21 1 4 1 4 4 41 3 3 33 31 2 2 2 2 ZZ 1ZZ 2ZZ 3ZZ 4ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ ZZ 1ZZ ZZ 2ZZ..... 3. 3. 4 4.. 2.. 2.. 2.. 2... 1.. 1.. 2 2. 3. 3. 42. 4. 2.. 4.. 3......... 2. 32. 3. 42. 4.. 2.. 4. 3.. 3.. 1.. 3.. min max..21.3.3.......21.4.421 4 4.4. 2 N h Shiele type (ZZ) h s LL 1LL 2LL 3LL 4LL LL LL LL LL LL 1LL LL LL LL LL LL 1LL LL 1LL LL 2LL gease oil s min 1) Noncontact seale type (LL) max max Abutment an fillet imensions NIKO
Mass (appox.) kg asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes 1 2 3 4 4 1 3 32 4 4 2 2 2 1 1 1 1 1 1 2 21 22 2 2 3 32 34 2. 2. 2. 2.1 2.1 1 1 21 3 4 2 2 2 3 4 1 3 2 22 3 4 44 4 3 4 2 3 22 1 1 1 4 1 4 4 42 4 3 3 2 21 1 1 2 3 3 4 44 42 2 21 22 2 2 2 2 21 2 2 2 2 2 21 2 21 2 22.. 2. 22. 2. 3 3. 42. 4. 2.. 3.. 3.. 3... 1.. 1.. 2. 3.. 4 4... 3.. 3. 1..... 1. 2. 2. 2. 2. 2..32.3.4..1...2.44 1.3. 1.4 1. 2. 2.2 3. N h s all eaing seies 2 gease oil s min 1) s Abutment an fillet imensions h min max max NIKO
ounay imensions Mass (appox.) kg 1 2 3 4 4 1 3 32 4 4 2 2 2 1 1 1 1 1 1 2 21 22 2 2 3 32 34 2. 2. 2. 2.1 2.1 1 1 21 3 4 2 2 2 3 4 1 3 2 22 3 4 44 4 3 4 2 3 22 1 1 1 4 1 4 4 42 4 3 1 1 1 3 3 2 4 43 3 3 34 32 3 2 2 2ZZ 21ZZ 22ZZ ZZ ZZ ZZ 2ZZ 2ZZ 2ZZ 2ZZ 21ZZ 2ZZ 2ZZ 2ZZ 2ZZ 2ZZ 21ZZ 2ZZ 21ZZ 2ZZ 22ZZ.. 2. 22. 2. 3 3. 42. 4. 2.. 3.. 3.. 3... 1.. 1. 1.. 2.. 2. 32. 3. 4............ 2.. 2. 3.. 4 4... 3.. 3. 1..... 1. 2. 2. 2. 2. 2..32.3.4..1...2.44 1.3. 1.4 1. 2. 2.2 3. asic loa atings ynamic static C Co Limiting spees pm eaing numbes N 2LL 21LL 22LL LL LL LL 2LL 2LL 2LL 2LL 21LL 2LL 2LL 2LL 2LL 2LL 21LL 2LL 21LU 2LL 22LL all eaing seies 2..LL, 2..ZZ gease oil s min 1) Shiele type (ZZ) h s Noncontact seale type (LL) s min max h max max Abutment an fillet imensions NIKO
Mass (appox.) kg asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes 1 2 3 4 4 1 3 42 4 2 2 2 1 1 1 2 2 21 2 2 31 33 3 3 41 43 4 4 2. 2. 2.1 2.1 2.1 2.1 2.1 3. 3. 3. 3. 2 1 1 2 2 3 4 3 2 2 1 3 3 3 3 3 42 4 1 32 3 4 2 1 1 2 1 1 4 4 4 4 43 4 3 3 33 32 2 21 1 2 2 3 4 4 4 42 3 3 3 31 32 33 34 3 3 3 3 31 3 3 3 3 3 31 3 31 3 32. 1. 2. 2. 32. 3. 43. 4. 3... 2.. 2.. 2.... 1. 3. 3 3. 4 4... 1....... 1.. 1. 2 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2..3..2.1.4.2.4 3. 1.3 1.3 2. 2.2 3.2 3. 4. 4.1.. N h s 2 all eaing seies 3 gease oil s min 1) s Abutment an fillet imensions h min max max NIKO
ounay imensions Mass (appox.) kg 1 2 3 4 4 1 3 42 4 2 2 2 1 1 1 2 2 21 2 2 31 33 3 3 41 43 4 4 2. 2. 2.1 2.1 2.1 2.1 2.1 3. 3. 3. 3. 2 1 1 2 2 3 4 3 2 2 1 3 3 3 3 3 42 4 1 32 3 4 2 1 1 2 1 1 4 4 4 4 43 4 3 3 33 32 1 1 1 3 4 42 3 3 33 31 2 2 2 22 3ZZ 31ZZ 32ZZ 33ZZ 34ZZ ZZ 3ZZ 3ZZ 3ZZ 3ZZ 31ZZ 3ZZ 3ZZ 3ZZ 3ZZ 3ZZ 31ZZ 3ZZ 31ZZ 3ZZ 32ZZ. 1. 2. 2. 32. 3. 43. 4. 3... 2.. 2.. 2.... 1.. 1... 2.. 43. 4. 4.. 4... 2... 1... 3. 3. 3 3. 4 4... 1....... 1.. 1. 2 2. 2. 2. 2. 2. 2. 2. 2. 2. 2. 2..3..2.1.4.2.4 3. 1.3 1.3 2. 2.2 3.2 3. 4. 4.1.. asic loa atings ynamic static C Co Limiting spees pm eaing numbes N 3LL 31LL 32LL 33LL 34LL LL 3LL 3LL 3LL 3LL 31LL 3LL 3LL 3LL 3LL 3LL 31LL 3LL 31LL 2 all eaing seies 3..LL, 3..ZZ gease oil s min 1) Shiele type (ZZ) h s Noncontact seale type (LL) s min max h max max Abutment an fillet imensions NIKO
asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes Mass (appox.) kg 2 3 4 4 1 2 32 42 4 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 4 4 3 34 2 3 3 4 1 2 1 3 1 22 1 22 3 3 2 22 2 1 1 2 4 1 3 4 4 42 4 3 3 2 21 1 3 1 2 3 4 4 41 12 1 1 1 1 1 1 1 1 1 1 1 12 121 122 1... 22. 2. 32. 3. 42........... 1 1.... 2. 32. 3. 44. 2............ 4.. 4. 4.. 4....32.1..1...1.1...441.44. 2.4..1 1.2 1.4 N h s 2 all eaing seies 1 gease oil s min 1) s Abutment an fillet imensions h min max max NIKO
asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes Mass (appox.) kg 1 2 3 4 4 21 2 32 3 42 4 2 2 1 1 1 1 1 1 2 2 21 4 43 4 4 1 4 1 1 2 2 3 4 44 1 1 1 1 3 32 2 2 21 1 4 4 3 31 2 21 1 1 1 4 1 1 1 2 3 4 1 1 22 2 32 3 42 4 2 2 4 4 22 3 4 4 3 1 1......22.2.2.33.4.2.3.1....4 N h s 2 all eaing seies gease oil s min 1) s Abutment an fillet imensions h min max max NIKO
ounay imensions Mass (appox.) kg ZZ 1ZZ 2ZZ 3ZZ 4ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ 2 1 3 4 44 41 3 3 34 32 2 2 21 1 4 4 2 2 3 4 44 1 1 1 1 3 2 2 21 4 43 4 4 1 4 1 1 1 1 1 1 1 21 2 32 3 42 4 2 2 1 1 2 3 4 4 22 2 32 3 42 4 2 2 4 4..... 2. 33. 3. 43. 4. 4.. 4..... 22 3 4 4 3 1 1......22.2.2.33.4.2.3.1....4 asic loa atings ynamic static C Co Limiting spees pm eaing numbes N LL 1LL 2LL 3LL 4LL LL LL LL LL LL 1LL LL LL LL LL LL 1LL 3 all eaing seies..ll,..zz gease oil s min 1) Shiele type (ZZ) h s Noncontact seale type (LL) s min max h max max Abutment an fillet imensions NIKO
asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes Mass (appox.) kg 1 2 3 4 4 22 2 3 3 42 4 2 2 1 1 1 1 1 2 2 41 4 4 1 1 1 4 4 2 3 4 4 1 2 3 3 2 22 3 2 22 1 2 1 3 32 2 2 2 2 22 2 32 3 44 4 4 2 22 2 2 4 4 1 4 1...1.1.3.42.4.4...2.1.3.2 34 3 3 1 2 3 4 1 1 N h s 31 all eaing seies gease oil s min 1) s h Abutment an fillet imensions min max max NIKO
ounay imensions Mass (appox.) kg 1 2 3 4 4 22 2 3 3 42 4 2 2 1 1 1 1 1, 2 2 41 4 4 1 1 1 4 4 2 3 4 4 1 2 3 3 2 22 3 2 22 1 2 1 21 1 4 1 3 1 4 43 4 3 32 22 2 32 3 44 4 4.. 1. 2.. 2. 34. 4. 4.... 2.. 2 22 2 2 4 4 1 4 1...1.1.3.42.4.4...2.1.3.2 34 3 3 ZZ 1ZZ 2ZZ 3ZZ 4ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ ZZ ZZ ZZ ZZ ZZ 1ZZ asic loa atings ynamic static C Co Limiting spees pm eaing numbes N LL 1LL 2LL 3LL 4LL LL LL LL LL LL 1LL LL LL LL LL LL 1LL 32 all eaing seies..ll,..zz gease oil s min 1) Shiele type (ZZ) h s Noncontact seale type (LL) s min max h max max Abutment an fillet imensions NIKO
NIKO all eaing seies 22..2S h s ounay imensions asic loa atings Spee eaing numbes Abutment an fillet ynamic static ating imensions N pm s h s min 1) Co Co min max max max 1 2 3 4 4 3 32 4 4 2 2 2 1 1 1 2 3 332 1 31 3 4 1 3 21 2 1 3 4 22 2S 221 2S 222 2S 2 2S 2 2S 2 2S 22 2S 22 2S 22 2S 22 2S 221 2S. 1.. 2. 3.. 4 4... 1.. 2. 3 3. 43. 4. 4.. 2. 2. 3 3. 42. 4... 3.. 3. Mass kg (appox.).4.4.4.3....44.4.2 33
NIKO all eaing seies..2s h s s min 1) ounay imensions asic loa atings Spee eaing numbes Abutment an fillet ynamic static ating imensions N pm Co Co s h min max max max 1 2 3 4 4 3 42 4 2 2 2 1 21 2 31 33 3 4 2. 1 1 2 21 332 41 2 1 34 4 4 1 3 3 3 4 43 2S 1 2S 2 2S 3 2S 4 2S 2 2S 2S 2S 2S 2S 1 2S.. 2. 22. 2. 3 3. 43. 4. 3.... 2.. 2. 33. 4 44... 3. 3 32. 3. 42. 4... 2. 2. 2. 1 2. Mass kg (appox.).....2 2.4. 34
NIKO all eaing seies 3..2S h s ounay imensions s min 1) 1 2 asic loa atings ynamic static N Co Co 42 Spee ating pm eaing numbes 3 2S Abutment an fillet imensions s h min max max max. Mass kg (appox.). 2 31 2S. 2.2 32 2 32 2S 1. 3.3 3 33 2S 2. 33.2 2 42 1 3 34 2S. 3. 4 1 1 2S 2 2. 43.1 3 3 3 3 2S..1 2 2 3 2S 4 4..21 4 21 1 3 3 2S 4 4. 3.2 4 2 3 2S 4 21 1 31 2S.
NIKO all eaing seies 4 h s ounay imensions asic loa atings Limiting spees eaing numbes Abutment an fillet ynamic static imensions N pm s h s min 1) C Co gease oil min max max 2 3 4 4 2 2 1 21 2 2 31 33 2. 2. 2.1 2.1 2.1 22 2 34 4 3 1 31 3 4 4 4 4 1 3 2 4 1 1 1 2 4 1 43 44 4 4 4 4 4 41 4 4. 2. 33. 3. 43... 2.. 2... 1..... 2. 2. 2. 2. 2. Mass kg (appox.).2.4.3..2 1. 3 1. 2.2 2. 3
asic loa atings ounay imensions ynamic static C Co Limiting spees pm eaing numbes Mass (appox.) kg 1 2 3 4 4 3 32 4 4 2 2 2.3... 2 2. 2. 3.2 3.2 3.2 1 2 2 3 4 4 1 3 1 3 2 3 3 42 3 3 4 44 4 4 4 3 2 21 22 2 2 2 2 21 2 22 2 31 3 42 4 2 2 3 41 4 3 3.. 2. 2. 3 3. 42. 4.. 4..4..4..3..2.43. 4 a N h s a 3 all eaing seies 2 gease oil s min 1) s Abutment an fillet imensions h min max max NIKO
NIKO all eaing seies 2..2S ounay imensions asic loa atings ynamic static N Limiting spees pm eaing numbes Mass kg 1 3.3 s min 1) C Co 3 gease 1 oil 22 2 2S (appox.).4 32. 1 2 21 2S.. 1 22 2S. 4. 1 2S. 2 4 2 2 2S. 2 2 2 2S.1 3 2. 2 2 2 2S.2 2 2. 3 2 2 2S.4 4 3.2 44 34 2 2S.3 4 3.2 4 3 2 2S. 3
NIKO all eaing seies 3 h s a ounay imensions asic loa atings Limiting spees eaing numbes Abutment an fillet ynamic static imensions N pm s h s min 1) C Co gease oil min max max 2 3 4 4 42 4 2 2 2 1. 22.2 22.2.4 3.2 34. 3. 3. 44.4 2. 2 2 3 4 1 2 44 4 4 44 4 3 3 4 32 33 34 3 3 3 3 31 2. 2. 32. 3. 43. 4. 3.. 3. 4 4... 1. 2. 2. 2. 3. 3. 43. 4. 3... a Mass kg (appox.).2..2 2.3. 1 1.34 1.1 3
NIKO all eaing seies 3..2S ounay imensions asic loa atings ynamic static N Limiting spees pm eaing numbes Mass kg 42. s min 1) C 2 Co gease oil 32 2S (appox.).2 4 22.2 1 33 2S. 2 2 22.2 2 34 2S.2 2.4 3 1 2S 2 3 2 3.2 41 2 3 3 2S.4 4 1 3. 2 3 4 3 2S 4
ounay imensions 3 32 4 4 2 2 2 1 1 1 1 2 21 22 2 2. 1 2 3 4 4 s min 1) asic loa atings ynamic static C Co Limiting spees pm eaing numbes 4 1 3 2 22 2 3 31 34 3 4 1 21 21 33 4 1 1 1 1 21 1 1 2 1 4 3 4 4 42 3 3 22 4 4 2 3 4 4 43 1 2 3 4 1 1 4K K K K K K 1K K K K K 1K N Cylinical boe 41 Mass (appox.) kg.33.4.4.2...2.4.4. 2. 3 1. 1.33 1..1.1.2.4.44.4.4 1 1.31 1.2 all eaing seies,..k gease oil Tapee boe tape 1: cylinical boe tapee boe NIKO
ounay imensions 1 2 3 4 4 3 42 4 2 2 2 1 21 2 2 31 2. 2. 2.1 4 4 1 2 1 2 3 4 12 21 32 3 3 1 2 1 1 1 4 4 4 41 21 1 1 1 3 2 4 1 2 3 4 1 1 4K 1K K K K K 1K K K s min 1) Cylinical boe 42 asic loa atings ynamic static C Co Limiting spees pm eaing numbes N...2..1. 3...3 1.2 1...1.42.3 1.3 all eaing seies,..k gease oil Tapee boe tape 1: Mass (appox.) kg cylinical boe tapee boe NIKO
ounay imensions 1 2 3 4 4 3 32 4 4 2 2 2 1 1 1 1 2 2 3 3 2 2 2 2 2 2 34 3 1 1 33 34 4 4 1 4 2 1 1 1 1 4 4 22 221 222 2 2 2 22 22 22 22 221 22 22 2K 2K 22K 22K 22K 22K 221K 22K 22K s min 1) Cylinical boe asic loa atings ynamic static C Co Limiting spees pm eaing numbes N.4.1..... 2.43.4.3...3. 2.42.2.. 43 all eaing seies 22, 22..K gease oil Tapee boe tape 1: Mass (appox.) kg cylinical boe tapee boe NIKO
NIKO all eaing seies 22..2S ounay imensions asic loa atings ynamic static N Spee ating pm eaing numbes Mass kg 1 3 s min 1) C 3 Co gease 22 2S (appox.).4 32 3 1 221 2S.3 41 222 2S. 4 1 4 22 2 2S. 2 4 1 34 1 2 2S. 2 1 3 4 2 2S.1 3 2 2 4 22 2S.2 2 3 22 2S.41 4 22 2S. 4 22 3 22 2S.3 22 4 221 2S. 1 2 1 43 22 2S. 2 3 2 3 22 2S 44
1 2 3 4 4 Cylinical boe Tapee boe tape 1: ounay imensions s min 1) asic loa atings ynamic static C Co Limiting spees pm gease oil eaing numbes N 3 42 4 2 2 2 1 21 2 31 33 3 4 43 4 2. 2. 2.1 4 4 3 3 4 4 4 2 21 2 4 1 1 1 22 22 1 2 3 4 42 3 2 1 4 4 4 4 1 2 3 4 2 1 4K 2K K K K K 1K K K.3.1.1..2 34.4 1.1 1. 1.3 2.1 2..21 2.4 3. 1.2 2. 2.2 4 all eaing seies,..k Mass (appox.) kg cylinical boe tapee boe NIKO
NIKO all eaing seies..2s ounay imensions asic loa atings ynamic static N Spee ating pm eaing numbes Mass kg 42 s min 1) C 1 Co 2 gease 2 2S (appox.). 4 34 3 2S.1 2 2 21 3 4 4 2S.21 2 4 2 2S 4 3 2 2 2 2S.1 31 2 2S. 4 33 33 1 2S. 4 1 3 3 4 4 2S 1.3 4 2. 43 4 1 2S 1. 4
NOTE
NOTE