7. BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS

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1 7. OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS 7. ounay imensions an imensions of Snap Ring Gooves 7.. ounay imensions he bounay imensions of olling beaings, which ae shown in Figs.7. though 7.5, ae the imensions that efine thei extenal geomety. hey inclue boe iamete, outsie iamete, with, beaing with(o height), chamfe imension, etc. It is necessay to know all of these imensions when mounting a beaing on a shaft an in a housing. hese bounay imensions have been intenationally stanaize (ISO5) an aopte by JIS 52 (ounay imensions of Rolling eaings). he bounay imensions an imension seies of aial beaings, tapee olle beaings, an thust beaings ae liste in able 7. to 7.3 (Pages A40 to A49). In these bounay imension tables, fo each boe numbe, which pescibes the boe iamete, othe bounay imensions ae liste fo each iamete seies an imension seies. A vey lage numbe of seies ae possible; howeve, not all of them ae commecially available so moe can be ae in the futue. Acoss the top of each beaing table (7. to 7.3), epesentative beaing types an seies symbols ae shown (efe to able 7.5, eaing Seies, Page A55). he elative coss-sectional imensions of aial beaings (except tapee olle beaings) an thust beaings fo the vaious seies classifications ae shown in Figs. 7.6 an 7.7 espectively. With Seies iamete Seies imensions of Snap Ring Gooves an Locating Snap Rings he imensions of Snap ing gooves in the oute sufaces of beaings ae specifie by ISO 464. Also, the imensions an accuacy of the locating snap ings themselves ae specifie by ISO 464. he imensions of snap ing gooves an locating snap ing fo beaings of iamete seies 8, 9, 0, 2, 3, an 4, ae shown in able 7.4 (Pages A50 to A53). j Fig. 7. ounay imensions of Raial all an Rolle eaings j C j j Fig. 7.2 apee Rolle eaings j j Fig. 7.3 Single-iection hust all eaings j 2 j 2 j Fig. 7.4 ouble-iection hust all eaings 2 imension seies iamete Seies Height Seies Fig. 7.7 Compaison of Coss Sections of hust eaings (except iamete Seies 5) fo Vaious imension Seies imension Seies j Fig. 7.6 Compaison of Coss Sections of Raial eaings (except apee Rolle eaings) fo vaious imensional Seies j Fig. 7.5 Spheical hust Rolle eaings A 38 A 39

2 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS all gs. ouble-row all gs. Cylinical Rolle gs. Neele Rolle gs. Spheical Rolle gs. able 7. ounay imensions of Raial eaings (except apee Rolle eaings) 68 N28 NN38 NN48 NA N9 N29 NN39 NN49 NA49 NA59 NA N0 N20 NN30 NN Units mm iamete Seies 7 iamete Seies 8 imension Seies imension Seies imension Seies ~ ~68 (min.) (min.) / / / iamete Seies 9 imension Seies imension Seies ~39 49~69 (min.) iamete Seies 0 imension Seies imension Seies ~60 oe Numbe (min.) / / / / / / / / / / / / / / / / / / / / / / / / / Remaks he chamfe imensions liste in this table o not necessaily apply to the following chamfes (a) Chamfes of the gooves in oute ings that have snap ing gooves. (b) Fo thin section cylinical olle beaings, the chamfes on sie without ib an beaing boe (in case of an inne ing) o oute suface (in case of an oute ing). (c) Fo angula contact ball beaings, the chamfes between the font face an boe (in case of an inne ing) o oute suface (in case of an oute ing). () Chamfes on inne ings of beaings with tapee boes. A 40 A 4

3 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS able 7. ounay imensions of Raial eaings (except apee Rolle eaings) 2 Units mm all gs. ouble-row all gs. Cylinical Rolle gs. Neele Rolle gs. Spheical Rolle gs NN 3 N 2 N 22 N iamete Seies imension Seies imension Seies ~4 (min.) iamete Seies 2 imension Seies imension Seies ~42 (min.) N 3 N 23 N 33 N iamete Seies 3 imension Seies imension Seies ~33 (min.) iamete Seies 4 imension Seies ~24 imension Seies oe Numbe (min.) / / / / / / / / / / / / / / / / / / / / / / / Remaks he chamfe imensions liste in this table o not necessaily apply to the following chamfes (a) Chamfes of the gooves in oute ings that have snap ing gooves. (b) Fo thin section cylinical olle beaings, the chamfes on sie without ib an beaing boe (in case of an inne ing) o oute suface (in case of an oute ing). (c) Fo angula contact ball beaings, the chamfes between the font face an boe (in case of an inne ing) o oute suface (in case of an oute ing). () Chamfes on inne ings of beaings with tapee boes. A 42 A 43

4 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS able 7. 2 ounay imensions of apee Rolle eaings Units mm apee Rolle gs X o apee Rolle gs. iamete Seies 9 iamete Seies 0 iamete Seies imension Seies 29 Chamfe imension Seies imension Seies Chamfe imension Seies Chamfe imension imension imension 2 Cone Cup Cone Cup 3 Cone Cup iamete Seies 2 iamete Seies 3 imension imension Chamfe imension imension Seies imension Seies 22 Seies 32 Cone Cup 03 Seies 3 oe Numbe C C (min.) C C (min.) C (min.) imension Seies 02 C C C (min.) imension Seies 23 C C ( ) C C Chamfe imension Cone Cup (min.) oe Numbe / / / / / / Remaks. Othe seies not confoming to this table ae also specifie by ISO. Remaks 2. In the imension Seies of iamete Seies 9, Classificationis those specifie by the ol stana, Classification 2 is those specifie by the ISO. Remaks 2. imension Seies not classifie confom to imensions (,, C, ) specifie by ISO. Remaks 3. he chamfe imensions liste ae the minimum pemissible imensions specifie by ISO. hey o not apply to chamfes on the font face Note ( ) Regaing steep-slope beaing 303, in IN, the one coesponing to 303 of JIS is numbee 33. Fo beaings with boe iametes lage than 00 mm, those of imension seies 3 ae numbee 33. A 44 A 45

5 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS hust all gs. Spheical hust Rolle gs. able 7. 3 ounay imensions of hust eaings (Flat Seats) Units mm hust all gs. Spheical hust Rolle gs. iamete Seies 0 imension Seies iamete Seies iamete Seies 2 iamete Seies 3 iamete Seies 4 iamete Seies 5 imension Seies imension Seies imension Seies (min.) (min.) (min.) (min.) Cental Washe Cental Washe (min.) 2 2 oe Numbe (min.) imension Seies imension Seies (min.) (min.) (min.) Cental Washe 2 oe Numbe Remaks Remaks. imension Seies 22, 23, an 24 ae ouble iection beaings. 2. he maximum pemissible outsie iamete of shaft an cental washes an minimum pemissible boe iamete of housing washes ae omitte hee. (Refe to the beaing tables fo hust eaings). A 46 A 47

6 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS hust all gs. Spheical hust Rolle gs. able 7. 3 ounay imensions of hust eaings (Flat Seats) Units mm hust all gs. Spheical hust Rolle gs. iamete Seies 0 imension Seies iamete Seies imension Seies 7 9 iamete Seies 2 imension Seies Cental Washe 2 iamete Seies 3 iamete Seies 4 iamete Seies 5 imension Seies imension Seies imension Seies (min.) (min.) (min.) (min.) Cental Washe Cental Washe (min.) 2 2 oe Numbe (min.) (min.) (min.) (min.) oe Numbe / / / / / / / / / / / / / /70 / / / / / /850 / / / / / /000 / /20 20 / / /20 80 /80 / / / / / /400 / / / / / /700 / / / / / /2000 / / / / / / / /2500 Remaks Remaks. imension Seies 22, 23, an 24 ae ouble iection beaings. 2. he maximum pemissible outsie iamete of shaft an cental washes an minimum pemissible boe iamete of housing washes ae omitte hee. (Refe to the beaings tables fo hust eaings). A 48 A 49

7 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS able 7. 4 imensions of Snap Ring Gooves an Locating Snap Rings () eaings of imension Seies 8 an 9 N a b 0 Sie Cove f Housing g (Geomety of locating snap ing fitte in goove) N e j j x j 2 Units mm Applicable eaings imension Seies Snap Ring Goove iamete Snap Ring Goove Snap Ring Goove Position a eaing imension Seies 8 9 Snap Ring Goove With b Raius of ottom Cones max. min. max. min. max. min. max. min. max Locating Snap Ring Remaks he minimum pemissible chamfe imensions N on the snap-ing-goove sie of the oute ings ae as follows imension seies 8 Fo outsie iametes of 78mm an less, use 0.3mm chamfe. Fo all othes exceeing 78mm, use 0.5mm chamfe. imension seies 9 Fo outsie iametes of 24mm an less, use 0.2mm chamfe. Fo 47mm an less, use 0.3mm chamfe. A 50 Fo all othes exceeing 47mm, use 0.5mm chamfe (Howeve, fo an outsie iamete of A 5 68 mm, use a 0.3 mm chamfe, which is not compliant with ISO 5). Locating Snap Ring Numbe Coss Sectional Height e hickness f Geomety of snap ing fitte in goove (Refeence) Slit With g Snap Ring Outsie iamete 2 Sie Cove Steppe oe iamete (Refeence) max. min. max. min. appox. max. min. NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR X

8 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS able 7. 4 imensions of Snap Ring Gooves an Locating Snap Rings (2) eaing of iamete Seies 0, 2, 3, an 4 N a b 0 Sie Cove f Housing e g (Geomety of locating snap ing fitte in goove) N j x j 2 j Applicable eaings iamete Seies Snap Ring Goove iamete Snap Ring Goove Snap Ring Goove Position a eaing iamete Seies 0 2, 3, 4 Snap Ring Goove With b Raius of ottom Cones max. min. max. min. max. min. max. min. max. Locating Snap Ring Numbe Coss Sectional Height e Locating Snap Ring hickness f Geomety of snap ing fitte in goove (Refeence) Slit With g Snap Ring Outsie iamete 2 Units mm Sie Cove Steppe oe iamete (Refeence) max. min. max. min. appox. max. min. X Note ( ) he locating snap ings an snap ing gooves of these beaings ae not specifie by ISO. Remaks. he imensions of these snap ing gooves ae not applicable to beaings of imension seies 00, 82, an he minimum pemissible chamfe imension N on the snap-ing sie of oute ings is 0.5mm. Howeve, fo beaings of iamete seies 0 having outsie iametes 35mm an below, it is 0.3mm. NR 026 ( ) NR 028 ( ) NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR A 52 A 53

9 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS 7.2 Fomulation of eaing Numbes eaing numbes ae alphanumeic combinations that inicate the beaing type, bounay imensions, imensional an unning accuacies, intenal cleaance, an othe elate specifications. hey consist of basic numbes an supplementay symbols. he bounay imensions of commonly use beaings mostly confom to the oganizational concept of ISO, an the beaing numbes of these stana beaings ae specifie by JIS 53 (eaing Numbes fo Rolling eaings). ue to a nee fo moe etaile classification, NSK uses auxiliay symbols othe than those specifie by JIS. eaing numbes consist of a basic numbe an supplementay symbols. he basic numbe inicates the beaing seies(type) an the with an iamete seies as shown in able 7.5. asic numbes, supplementay symbols, an the meanings of common numbes an symbols ae liste in able 7.6 (Pages A56 an A57). he contact angle symbols an othe supplementay esignations ae shown in successive columns fom left to ight in able 7.6. Fo efeence, some examples of beaing esignations ae shown hee (Example ) ZZ C3 (Example 2) A C3 Raial Cleaance C3 (Intenal Cleaance ) Shiels on oth Sies (Shiel ) eaing oe 40mm (oe Numbe) iamete Seies 3 eep Goove all eaing Axial Cleaance C3 ack-to-ack Aangement Contact Angle 30 o eaing oe 00mm iamete Seies 2 Angula Contact all eaing (Example 3) K +H206X Aapte with 25mm oe apee oe (ape 2) eaing oe 30mm iamete Seies 2 Self-Aligning all eaing } eaing Seies (Example 4) NU 3 8 M CM (Example 5) NN K CC P4 (Example 6) HR J (Example 8) Raial Cleaance fo Electic-Moto eaings CM Machine ass Cage eaing oe 90mm iamete Seies 3 NU ype Cylinical Rolle eaing Accuacy of ISO Class 4 Raial Cleaance in Non- Intechangeable Cylinical Rolle eaings CC apee oe (ape 2) eaing oe 85mm iamete Seies 0 With Seies 3 NN ype Cylinical Rolle eaing Small iamete of Cup Raceway an Contact Angle Confom to ISO eaing oe 35mm iamete Seies 2 With Seies 0 apee Rolle eaing High Capacity eaing (Example 7) /000 M K30 E4 C3 Raial Cleaance C3 Oute Ring with Oil Goove an Oil Holes apee oe (ape 30) Machine ass Cage eaing oe 000mm iamete Seies 0 With Seies 4 Spheical Rolle eaing eaing oe 75mm iamete Seies 2 Height Seies hust all eaing eaing ype eep Goove all eaings Angula Contact all eaings Self-Aligning all eaings Cylinical Rolle eaings eaing Seies ype imension With iamete 68 6 () () () (0) (0) () () (0) (0) 3 2 (0) 2 3 (0) 3 22 () () 2 3 NU0 NU 0 NU20 NU (0) 2 NU22 NU 2 2 NU30 NU (0) 3 NU23 NU 2 3 NU40 NU (0) 4 NJ20 NJ (0) 2 NJ22 NJ 2 2 NJ30 NJ (0) 3 NJ23 NJ 2 3 NJ40 NJ (0) 4 NUP20 NUP (0) 2 NUP22 NUP 2 2 NUP30 NUP (0) 3 NUP23 NUP 2 3 NUP40 NUP (0) 4 N0 N 0 N20 N (0) 2 N30 N (0) 3 N40 N (0) 4 NF2 NF (0) 2 NF3 NF (0) 3 NF4 NF (0) 4 able 7. 5 eaing Seies eaing ype ouble-row Cylinical Rolle eaings Neele Rolle eaings apee Rolle eaings Spheical Rolle eaings hust all eaings with Flat Seats Spheical hust Rolle eaings eaing Seies ype Note ( ) eaing Seies 23 shoul logically be 203, but customaily it is numbee 23. Remaks Numbes in ( ) in the column of with symbols ae usually omitte fom the beaing numbe. imension With o Height iamete NNU49 NNU 4 9 NN30U NNU 3 0 NA48 NA 4 8 NA49 NA 4 9 NA59 NA 5 9 NA69 NA ( ) A 54 A 55

10 OUNARY IMENSIONS AN IENIFYING NUMERS FOR EARINGS able 7. 6 Fomulation of eaing Numbes asic Numbes Auxiliay eaing Seies ( ) oe Numbe Contact Angle Intenal esign Mateial Cage Extenal Featues Seals, Shiels Meaning Meaning Meaning Meaning Meaning Meaning Meaning ( 68 Single- eaing mm Angula oe A Intenal esign g Case-Haene M Machine Z Shiel Row eep Contact 69 all) iffes fom Steel Use in ass Cage 2 2 ZS } on One Goove all eaings Stana One Rings, Rolling Sie 60 eaings A Stana Elements Only 3 3 Contact Angle J Smalle iamete of of Oute Ring Raceway, Contact Angula 72 Angle, an Oute ZZ Shiels Contact all A5 Stana Ring With of W Pesse ZZS } on oth eaings Contact Angle apee Rolle h Steel Cage Sies of eaings Confom Stainless Steel Use in Rings, to ISO Self- Rolling Elements 0 20 Aligning all 3 Stana eaings Contact Angle U Contact 22 of 40 Rubbe Seal on One Sie Synthetic Only NU0 Cylinical Resin Cage Rolle NJ 2 C Stana eaings / ( Fo eaings High Capacity ) Contact Angle N 3 of 5 U Contact / NN 30 Rubbe Seals on / C V oth Sies NA48 NA49 NA Neele Rolle eaings apee Rolle eaings ( 2 ) Spheical Rolle eaings hust all eaing with Flat Seats hust Spheical Rolle eaings HR( 4 ) High Capacity apee Rolle eaings, an othes 04( 3 ) / / / / / ( apee Rolle ) eaings Omitte Contact Angle Less than 7 an Numbes Confom to JIS( 5 ) C Contact Angle about 20 Contact Angle about 28 CA C EA E E Spheical Rolle eaings Cylinical Rolle eaings Spheical hust Rolle eaings NSK Without Cage Make on eaings Not Make on eaings Notes ( ) eaing Seies confom to able 7.5. ( 2 ) Fo basic numbes of tapee olle beaings in ISO's new seies, efe to Page. ( 3 ) Fo eaing oe Numbes 04 though 96, five times the boe numbe gives the boe size (mm) (except oubleiection thust ball beaings). ( 4 ) HR is pefix to beaing seies symbols an it is NSK's oiginal pefix. V VV Non- Contact Rubbe Seal on One Sie Only Non- Contact Rubbe Seals on oth Sies NSK A 56 A 57 fo esign of Rings E E4 N NR Patially the same as JIS( 5 ) Notes Aangement Same as JIS( 5 ) Intenal Cleaance Peloa CC CC2 CC CC3 CC4 CC5 MC MC2 MC3 MC4 MC5 MC6 CM C CM Fo All Raial gs. Fo Non-Intechangeable Cylinical Rolle gs. Fo Exta-Small an Miniatue all gs. oleance Class P5 ISO Class 5 P4 ISO Class 4 P2 ISO Class 2 ( AMA( 7 ) apee olle beaing ) Omitte Class 4 PN2 Class 2 PN3 Class 3 PN0 Class 0 PN00 Class 00 Special Specification X28 X29 S Space o Sleeve H AH HJ Gease Meaning Meaning Meaning (aial cleaance) Meaning Meaning Meaning Meaning K apee ack-to-ack C Cleaance Less Omitte ISO Nomal eaings +K eaings AS2 SHELL oe of Aangement than C2 teate fo with Oute ALVANIA Inne Ring C2 Cleaance Less Ring GREASE S2 (ape 2) than CN ( imensional) Spaces Omitte CN Cleaance P6 ISO Class 6 Stabilization ENS ENS GREASE F Face-to- +L eaings Face C3 Cleaance Geate Aangement than CN X26 Woking with Inne K30 apee P6X ISO Class 6X empeatue Ring NS7 C4 Cleaance Geate oe of Lowe than Spaces NS HI-LUE than C3 Inne Ring 50 C (ape 30) anem C5 Cleaance Geate +KL Aangement than C4 Notch o Lubicating Goove in Ring Lubicating Goove in Outsie Suface an Holes in Oute Ring Snap Ring Goove in Oute Ring Snap Ring Goove with Snap Ring in Oute Ring Cleaance Less than CC2 Cleaance Less than CC Nomal Cleaance Cleaance Geate than CC Cleaance Geate than CC3 Cleaance Geate than CC4 Cleaance Less than MC2 Cleaance Less than MC3 Nomal Cleaance Cleaance Geate than MC3 Cleaance Geate than MC4 Cleaance Geate than MC5 Cleaance in eep Goove all eaings fo Electic Motos Cleaance in Cylinical Rolle eaings fo Electic Motos ( Peloa of Angula Contact ) all eaing EL Exta light Peloa L Light Peloa M Meium Peloa H Heavy Peloa Patially the NSK same as JIS( 5 )/ Same as JIS( 5 ) NSK, Patially the same as JIS( 5 ) AS( 6 ) In Pinciple, Make on eaings Not Make on eaings ( 5 ) JIS Japanese Inustial Stanas. ( 6 ) AS he Japan eaing Inustial Association Stana. ( 7 ) AMA he Ameican eaing Manufactues Association. Woking empeatue Lowe than 200 C Woking empeatue Lowe than 250 C ( Spheical Rolle eaings ) imensional Stabilizing eatment Woking empeatue Lowe than 200 C eaings with oth Inne an Oute Ring Spaces Aapte esignation Withawal Sleeve esignation hust Colla esignation PS2 MULEMP PS No. 2

Single Row Deep Groove Ball Bearings

Single Row Deep Groove Ball Bearings Single Row eep Goove all eaings Single Row eep Goove all eaings The single ow eep goove ball beaings have elatively eep aceways on both ings without a filling slot an ae non-sepaable. High loa atings ae