OLTAY-NTN

General DataTypes of bearings 6˾ Definitions 6˾ Vocabulary 8˾ Capabilities 9Standardization and interchangeability 12˾ The Standards 12˾ Interchangeability 12Dimensions and part numbers 14˾ General designations 14 Complete reference 14 Basic reference 15 16˾ Designations of tapered roller bearing 17˾ Designation of special bearings 18Bearing manufacturing precision 18˾ Standardization 19 Tolerance definition 22 Equivalence of bearing precision standards 22 23˾ Bearing tolerances 24 Radial bearings - Normal tolerance classes 25 High-precision radial bearings - Tolerance class 6 26 High-precision radial bearings - Tolerance class 5 27 High-precision radial bearings - Tolerance class 4 28 High-precision radial bearings - Tolerance class 2 29 Tapered roller bearings - Normal tolerance class 30 High-precision tapered roller bearings - Tolerance class 6X 31 High-precision tapered roller bearings - Tolerance class 5 32 Ball thrust bearings - Normal tolerance class Tapered bores: 1:12 and 1:30 taper 34Bearings initial radial internal clearance 34 34˾ Radial clearance of radial contact bearings. Definition˾ Internal radial clearance groups 35Axial clearance of angular contact bearings 35˾ Recommended axial clearance

General DataTypes of bearingsDefinitionsA bearing is a mechanical unit that provides a mobile link between two parts that rotate inrelation to one another. Its function is to permit relative rotation of these parts, under load, withaccuracy and minimum friction.˾ A bearing consists of: • two rings, one associated with a fixed element, the other with the moving element and featuring raceways • rolling elements allowing relative displacement of the two rings with minimum friction • a cage separating the rolling elements˾ There are two large bearing families: • ball bearings, allowing high speeds of rotation and where the ball-raceway interface is theoretically point contact • roller bearings, where the ball-raceway interface is theoretically line contact. Roller bearings can withstand higher radial loads than ball bearings 6

Type Outer Inner Rolling Synthetic Pressed Integrally ring ring elements material steel machinedBall bearingCylindrical roller bearingTapered roller bearing (cup) (cone)Double-row spherical roller bearingNeedle bearingBall thrust bearing (housing ring) (shaft ring)Spherical roller thrust bearing (housing ring) (shaft ring) 7

General DataTypes of bearings (continued)VocabularyStandard ISO 5593 has established a vocabulary of standard terms applicable to bearingsand bearing technology.The terms and definitions are given in a multilingual glossary. cage housing rolling element pitch diameter inner ring shaft Angular-contact outer ring ball bearingBall bearing Cylindrical roller bearingwidth outside diameter load line shoulder corner radius α : contact angle raceway Spherical roller groove for seal thrust bearing or shield face bevel shoulder pitch diameter bore point of load application Tapered Ball thrust roller bearing bearingouter ring shoulder housing ring (cup) shaft ringinner ring (cone) load linepoint of load α : contact angle point of load load line application 8 application

Capabilities Application examplesGeneral characteristics and capabilities Electric motor Wheel of trailer˾ Ball bearings Household electricalQ Single- or double-row radial ball bearings appliancesPopular bearings due to their cost/performance Woodworking machinecompromise. spindlesNumerous variants (shielded, sealed etc.) and Small reducing gearlarge selection of dimensions. Gear boxQ Single-row angular-contact ball bearings Reduction gear boxAlways mounted in opposition with another Machine-tool spindlebearing of the same type.Give great assembly rigidity, especially when Reducing gearpreloaded Automobile wheels Agricultural machineryQ Double-row angular-contact ball bearingsWithstand axial loads in both directions. Reducing gearCan be used alone as a double bearing. For long shaftQ 4-point angular contact ball bearings with deflectionWithstand axial loads in both directions.Often associated with a radial contact bearing. Roll stand Large reducing gear˾ Double-row self-aligning ball or spherical Large industrial fan roller bearings Printing machine roller Quarry machineQ Double-row self-aligning ball bearingsThe spherical raceway of the outer ringpermits angular displacement.A variant with a tapered bore simplifies fitting.Q Spherical roller bearingsThe spherical raceway of the outer ringpermits angular displacementA variant with a tapered bore simplifies fitting. 9

General Data Application examplesTypes of bearings (continued) Heavy-duty electric motor Wagon axle boxGeneral characteristics and capabilities Pressure roller˾ Roller bearings Rolling machine rollQ Cylindrical roller bearingsExcellent resistance to instantaneous over- Reducing gear shaftloads and shocks. Truck wheelSimplification of installation thanks to their Bevel gear transferdetachable elements. gearboxCertain types allow axial displacement; othersallow a low axial load. TGV high-speed train axle boxQ Single-row tapered roller bearings Automobile wheelAlways mounted in opposition with anotherbearing of the same type. Vertical shaftGive great assembly rigidity, especially when Tailstockpreloaded. Plate pumpQ Double-row tapered roller bearings Heavy-duty vertical shaft (SNR TWINLINE) Turbo-generator Crane pivotAccept axial loads in both directions. Plastic injection screwOften used alone as a double bearing.Q Needle bearingsAccept relatively high radial loads with smallspace requirement and high radial rigidity.˾ Thrust bearingsThrust bearings are often used with othertypes of bearing.Q Ball thrust bearingsWithstand axial loads only.If radial load is applied must be associatedwith a radial bearing.Q Spherical roller thrust bearingsCan withstand a radial and axial load whileaccepting misalignment. 10

Load capabilities Limiting speed Permissible of rotation misalignment radial axial between shaft and housingTypes Cross-section low medium good low medium good low medium good low goodRadial ball bearing Double-row radial ball bearing Angular-contact ball bearing 4-point angular-contact ball bearing Double-row angular contact ball bearing TWINLINE angular contact ball bearing Double-row self-aligning ball bearing Cylindrical roller bearing (1) Tapered roller bearing TWINLINE tapered roller bearing Double-row spherical roller bearing Single-direction ball thrust bearing Spherical roller thrust bearing(1) Types NJ and NUP accept low axial loads 11

General DataStandardization and interchangeabilityThe standardsThe mission of the International Standard Organisation (ISO) is to develop and coordinatestandardization to facilitate the trade of products and services between nations. It encompassesthe standards committees of 89 countries (AFNOR-France, DIN-Germany, UNI-Italy, BS-GreatBritain, ANSI-United States, etc.).Bearing standardization is the responsibility of the ISO Technical Committee \"TC 4\" in whichSNR plays an active part. The main standards used for bearings and thrust bearings arespecified in the appendix page 147.Interchangeability˾ Dimensional interchangeability is guaranteed by the values and tolerances on the bearing dimensions: d, D, B, C, r and T.d Bore diameterD Outside diameterB Width of bearing or width of inner ring (cone)C Width of bearing or width of outer ring (cup)T Width or total heightr Corner radiusAll types of bearings Taperedexcept tapered roller roller bearingsand thrust bearings T B rC rrrDd Dd BStrict application of the standards in the manufacture of the bearing enables one to obtainfull interchangeability between bearings of the same part number, whoever the manufacturer,place or date of production.Standardization of the bearing also allows dimensional interchangeability between bearingsof different types, either total or partial. It is necessary to ensure the functional inter-changeability. 12

˾ Bearing series codes according to the different outside diameters and widthsFor a given bore the standards provide for several diameter series (series 8, 9, 0, 1, 2, 3, 4 inascending order).For each diameter series there are several width series (series 0, 1, 2, 3, 4 in ascending order).˾ Interchangeability of detachable elements of cylindrical or tapered roller bearingsCylindrical or tapered roller bearings can be separated into two parts: a ring that is joined tothe cage and rollers and a bare ring.Cylindrical roller bearingsInterchangeability is ensured by thedimensions below the rollers F andabove the rollers E. ØF ØETapered roller bearings ØEThe interchangeability of the internalsub-assemblies (fitted cones) andouter rings (cups) is ensured bystandard ISO 355 which defines thecontact angle α and the theoreticalinside diameter of the cup E. Onemust check that the bearings areindeed identical (same suffix).Caution : There is full interchangeability between SNR elements. ISO has standardizedthe values of the above dimensions without specifying their tolerances.Consequently, although the assembly of elements from different manufacturerspresents no risk, it does not always give optimum performance and should thereforebe avoided. 13

General DataDimensions and part numbersGeneral designationsISO has established standards in the form of a general plan of dimensions corresponding tostandards ISO 15, ISO 355 and ISO 104. These standards allow universal use of the differenttypes of bearings.• The general designation system taken from standards ISO 15 and ISO 104 applies to all types of standardized bearings• Tapered roller bearings have specific designations taken from standard ISO 355The special bearings have a specific numbering system. Complete part number˾ Each bearing part number is comprised of the following components: 60 10 ZZ SuffixPrefix Series code Bore code (optional)(optional) Basic part number Complete part numberExamples: 62 04 ZZ Suffix ZZ double shieldingNo prefix Bore code 04 x 5 = 20 mm boreSeries 62 code NU 314 302 08 14 x 5 = 70 mm boreSeries NU3 : cylindricalroller bearings 08 x 5 = 40 mm boreSeries 302 taperedroller bearingsThe table on the following page specifies the different possibilities for the series codes andbore codes. The main suffixes and prefixes are specified in the chapter corresponding to eachfamily. 14

Basic part number 60 XX Part Type of bearing Part Type of bearing Bore Bore diameternumber Radial ball number Angular-contact code mm bearing 60 X 72 XX ball bearing 33 62 X With 1 row of balls 73 XX 63 XX 718 XX With 1 row of balls /4 4 64 XX 44 160 XX QJ2 XX 618 XX QJ3 XX 55 619 XX 622 XX 66 623 XX /6 6 With 4 points of contact 77 /7 72 XX 32 XX With 2 rows of balls3 XX 33 XX With 2 rows of balls ZZ or EE 88 /8 8 With a filling slot 52 XX 53 XX 99 42 XX 43 XX With 2 rows of balls Double-row spherical 00 10 roller bearing 01 12302 XX Tapered 02 15303 XX roller bearing 03 17313 XX320 XX 213 XX /22 22322 XX 222 XX /28 28323 XX 223 XX /32 32330 XX 230 XX331 XX 231 XX 04 04x5 = 20332 XX 232 XX 05 05x5 = 25 240 XX 06 06x5 = 30 241 XX 07 07x5 = 35 N..2 XX Cylindrical Ball thrust bearing 08 08x5 = 40 N..3 XX roller bearing 09 … N..4 XX 511 XX 10 …N..10 XX NU N NJ NUP 512 XXN..22 XX 513 XXN..23 XX 514 XX Double-row self-aligning ball bearing Spherical roller thrust bearing12 XX13 XX 293 XX22 XX 294 XX23 XX112 XX113 XX Wide inner ring 15

General DataDimensions and part numbers (continued)Designations of tapered roller bearingsStandard ISO 355 defines the series of dimensions of tapered roller bearings.The old part numbering system has been maintained in this catalog. The new designa-tion is however mentioned for the bearings of the new series.T4 C D 075 Letter T Bearing for tapered boreroller bearings Width series Range of contact angles Diameter series B C Angle Contact B D series angle C E D 2 10° < α ≤ 13°52’ E 3 13°52’ < α ≤ 15°59’ F 4 15°59’ < α ≤ 18°55’ G 5 18°55’ < α ≤ 23° 6 23° < α ≤ 27° 7 27° < α ≤ 30°˾ Width and diameter series Diameter seriesGFEDCBBCDE BCDE BCDE BCDE BCDE BCDE Width series 16

Designation of special bearingsThe part numbers of special bearings is not standard and is specific to each manufacturer.The designation system defined by SNR is given below.Y53 GB 40256 S01Material modification Sequence number in the following number ranges: Variant suffix or heat treatment 9000 to 13999 (optional) 40000 to 42999 Type of bearing ExamplesAB Single-row radial contact ball bearingBB Single-row angular contact ball bearingGB Two-part double-row angular contact ball bearingTGB Single-flange double-row angular contact ball bearingHGB Two-flange double-row angular contact ball bearingDB Double-row radial contact ball bearingAP Ball thrust bearingQJ 4-point angular contact bearingsTJ 3-point angular contact bearingsN.. Cylindrical roller bearing: N, NU, NUPGNU Cylindrical roller bearingEC Single-row tapered roller bearingFC Double-row tapered roller bearingTFC Single-flange double-row tapered roller bearingQR Crossed roller bearingX... Sensor bearings XGB, XTGB, XHGB, XFC, XTFCCH Ceramic Rolling Elements Standard MachLine MachLine Etanche H 17

General DataBearing manufacturing precisionStandardization˾ Standard ISO 492 specifies the tolerances applicable to the dimensions and precision ofrotation of metric series radial bearings.The dimensional tolerances defined by this standard bear the following symbols: Internal master External master gauge subassembly gauge subassembly BBT T2 T1rr rC r r Dd r BDd Dd˾ Tolerance classes defined by standard ISO 492:Q The Normal class, which is that of all the standard bearings, and is not usually indicated in the bearing designationQ The High precision classes which are, in ascending order of precision: ISO 6, ISO 5, ISO 4, ISO 2These classes are indicated in the suffix added to the bearing reference.Example: C3 P5 Clearance category 3 ISO precision class 5Standard ISO 199 sets the tolerances on thrust bearing dimensions.Standard ISO 582 sets the tolerances on bearing corner radii. The dimensions applicable tofillets and shoulders are indicated in the table of bearing characteristics.Standard ISO 5753 defines the tolerances on the radial clearance of the bearings. 18

Tolerance definitionThe tolerance classes fix several types of tolerances and characteristics given for a tempera-ture of 20°C ± 1°C (68°F ±1.8).˾ Dimensional tolerancesStandard ISO 492 sets the tolerances for the three main dimensions of a bearing:• the bore diameter d• the outside diameter D• the width of each ring B and C with, in addition, for tapered bearings, the total width T˾ Functional tolerancesThe standard also defines the precision of rotation of the bearings:• the raceway radial runout of each ring. It is measured on the moving ring with respect to the fixed ring• side face runout with reference to the bore of the inner ring• outer ring side face runout with respect to the outer diameter• side face runout with respect to the track 19

General DataBearing manufacturing precision (continued) Dimensional tolerances Deviationsd: nominal bore diameter ∆dmp • Deviation of a mean bore diameter in anD: nominal outside diameter isolated plane (tolerance on the mean diameter) Vdp • Variation in the bore diameter in an isolated radial plane (ovality) Vdmp • Variation in the mean bore diameter (applies only to a supposedly cylindrical bore) in different planes ∆Dmp • Deviation of a mean outside diameter in an isolated plane (tolerance on the mean diameter) VDp • Variation in the outside diameter in an isolated radial plane (ovality) VDmp • Variation in the mean outside diameter in different planesB: nominal width of ring ∆Bs • Deviation of an isolated width of the inner ring (width tolerance) VBs • Variation in the width of the inner ring (face parallelism)C: nominal width of ring ∆Cs • Deviation of an isolated width of the outer ring (width tolerance) VCs • Variation in the width of the outer ring (face parallelism)T : nominal width of tapered ∆Ts • Deviation in the actual width of the bearing bearing ∆T1s • Deviation in the effective actual widthT1: effective nominal width ∆T2s of the internal sub-assembly of the internal sub-assembly • Deviation in the effective actual widthT2: effective nominal width of the external sub-assembly of the external sub-assembly 20

Functional tolerances Deviationsradial run-out Kia • Radial run-out of the inner ring on the assembled bearing Kea • Radial run-out of the outer ring on the assembled bearingrun-out of the reference face Sd • Axial run-out of the reference face (or large face if applicable) of the inner ring with respect to the bore (run-out of the face of the inner ring) SD • Perpendicularity error of the external surface with respect to the reference face (or large face) of the outer ring (external surface run-out)bearing raceway run-out Sea • Axial run-out of the reference face (or large face) of the outer ring with respect to the bearing raceway, on the assembled bearing (run-out of outer ring raceway) Sia • Axial run-out of the reference face (or large face) of the inner ring with respect to the bearing raceway on the assembled bearing (run-out of the inner ring raceway)Consult SNR for the method of measurement. 21

General DataBearing manufacturing precision (continued)Equivalence of bearing precision standardsStandard Precision ISO AFNOR ABEC DINHigh Precision tolerance tolerance tolerance tolerance class class class class Normal Normal 1 P0 6 6 3 P6 5 5 5 P5 4 4 7 P4 2 2 9 P2The values given by the various standards for certain characteristics are not rigorouslyidentical.The tolerance class, when indicated on the bearing, imposes compliance with all the tolerancesin the said class.Nevertheless, certain bearing applications require special tolerances on certain dimensions orcharacteristics.To avoid using an excessively expensive high-precision bearing, SNR can supply bearings withreduced tolerances on certain dimensions or characteristics. For example, run-out of inner ringof high-speed bearings for wood-working machine spindles.Consult SNR.Bearing tolerances Standard ISO 492 page 23˾ Radial bearings page 24• Normal tolerance class page 25• Tolerance class 6 page 26• Tolerance class 5 page 27• Tolerance class 4• Tolerance class 2 Standard ISO 492 page 28˾ Tapered roller bearings page 29• Normal tolerance class page 30• Tolerance class 6X• Tolerance class 5 Standard ISO 199 page 31˾ Thrust bearings• Normal tolerance class, 6 and 5 Standard ISO 492 page 32˾ Tapered bores• Bore with 1:12 and 1:30 taper 22

Radial bearings - Normal tolerance classesWith the exception of tapered roller bearings and thrust bearings. Standard ISO 492.˾ Inner ring Tolerances in micrometers Vdp(1) ∆Bs d ∆dmp Diameter series Vdmp Kia all VBsmm 9 0,1 2,3,4 upper normal modified(1) max max upper lower max 6 lower max 6 100,6 ≤d≤ 2,5 0 -8 10 8 6 6 10 0 -40 – 122,5 <d≤ 10 0 -8 10 8 6 10 0 -120 -250 1510 <d≤ 18 0 -8 10 8 6 0 -120 -250 20 1318 <d≤ 30 0 -10 13 10 8 8 15 0 -120 -250 2030 <d≤ 50 0 -12 15 12 9 9 20 0 -120 -250 2050 <d≤ 80 0 -15 19 19 11 11 0 -150 -380 25 2580 <d≤ 120 0 -20 25 25 15 15 30 0 -200 -380 25120 <d≤ 180 0 -25 31 31 19 19 40 0 -250 -500 30180 <d≤ 250 0 -30 38 38 23 23 0 -300 -500 30 50250 <d≤ 315 0 -35 44 44 26 26 60 0 -350 -500 35315 <d≤ 400 0 -40 50 50 30 30 65400 <d≤ 500 0 -45 56 56 34 34 0 -400 -630 40 70 80 0 -450 – 50 90500 <d≤ 630 0 -50 63 63 38 38 0 -500 – 60 0 -750 – 70630 <d≤ 800 0 -75 – – – – 0 -1000 – 80800 <d≤1000 0 -100 – – – –(1) Relates to the rings of isolated bearings for installation in pairs or per unit.˾ Outer ring Tolerances in micrometers VDp(1) D ∆Dmp Open bearings Shielded ∆Cs VCsmm bearings ∆C1s(2) VC1s(2) VDmp(1) Kea Diameter series 9 0,1 2,3,4 2,3,4 upper lower max max max upper lower max2,5 ≤D≤ 6 0 -8 10 8 6 10 6 15 6 <D≤ 18 0 -8 10 8 6 10 6 1518 <D≤ 30 0 -9 12 9 7 12 7 1530 <D≤ 50 0 -11 14 11 8 16 8 2050 <D≤ 80 0 -13 16 13 10 20 10 2580 <D≤ 120 0 -15 19 19 11 26 11 35120 <D≤ 150 0 -18 23 23 14 30 14 40150 <D≤ 180180 <D≤ 250 0 -25 31 31 19 38 19 45 Identical to ∆Bs and VBs 0 -30 38 38 23 - 23 50 of the inner ring250 <D≤ 315 0 -35 44 44 26 - 26 60 of the same bearing315 <D≤ 400 0 -40 50 50 30 - 30 70400 <D≤ 500 0 -45 56 56 34 - 34 80500 <D≤ 630 0 -50 63 63 38 - 38 100630 <D≤ 800 0 -75 94 94 55 - 55 120800 <D≤1000 0 -100 125 125 75 - 75 140Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492.(1) Taken before fitting and after removal of the inner or outer snap ring.(2) Only applies to ball and grooved bearings. 23

General DataBearing manufacturing precision (continued) High-precision radial bearings – Tolerance class 6With the exception of tapered roller bearings and thrust bearings. Standard ISO 492.˾ Inner ring Tolerances in micrometers Vdp ∆Bs d ∆dmp Diameter series Vdmp Kia all VBsmm 9 0,1 2,3,4 upper normal modified(1) max max upper lower max lower max 5 50,6 ≤d≤ 2,5 0 -7 9 75 5 6 0 -40 – 122,5 <d≤ 10 0 -7 9 75 5 7 0 -120 -250 1510 <d≤ 18 0 -7 9 75 0 -120 -250 2018 <d≤ 30 6 830 <d≤ 50 0 -8 10 8 6 8 10 0 -120 -250 2050 <d≤ 80 0 -10 13 10 8 9 10 0 -120 -250 20 80<d≤ 120 0 -12 15 15 9 0 -150 -380 25120 <d≤ 180 11 13180 <d≤ 250 0 -15 19 19 11 14 18 0 -200 -380 25250 <d≤ 315 0 -18 23 23 14 17 20 0 -250 -500 30315 <d≤ 400 0 -22 28 28 17 0 -300 -500 30400 <d≤ 500 19 25500 <d≤ 630 0 -25 31 31 19 23 30 0 -350 -500 35 0 -30 38 38 23 26 35 0 -35 44 44 26 30 40 0 -400 -630 40 0 -40 50 50 30 0 -450 – 45 0 -500 – 50(1) Relates to the rings of isolated bearings for installation in pairs or per unit.˾ Outer ring Tolerances in micrometers VDp(1) D Open bearings Shielded ∆Cs VCsmm bearings ∆C1s(2) VC1s(2) ∆Dmp VDmp(1) Kea Diameter series 9 0,1 2,3,4 0,1,2,3,4 upper lower max max max upper lower max2,5 ≤D≤ 6 0 -7 975 9 58 6 <D≤ 18 0 -7 975 9 58 18 <D≤ 30 0 -8 10 8 6 10 69 30 <D≤ 50 50 <D≤ 80 0 -9 11 9 7 13 7 10 80 <D≤ 120 0 -11 8 13 0 -13 14 11 8 16 10 18120 <D≤ 150150 <D≤ 180 0 -15 16 16 10 20180 <D≤ 250 0 -18250 <D≤ 315 0 -20 19 19 11 25 11 20315 <D≤ 400400 <D≤ 500 0 -25 23 23 14 30 14 23500 <D≤ 630 0 -28630 <D≤ 800 0 -33 25 25 15 – 15 25 Identical to ∆Bs and VBs800 <D≤1000 0 -38 31 31 19 – 19 30 of the inner ring 0 -45 35 35 21 – 21 35 of the same bearing 0 -60 41 41 25 – 25 40 48 48 29 – 29 50 56 56 34 – 34 60 75 75 45 – 45 75Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492.(1) Taken before fitting and after removal of the inner or outer snap ring.(2) Only applies to ball and grooved bearings. 24

High-precision radial bearings – Tolerance class 5With the exception of tapered roller bearings and thrust bearings. Standard ISO 492.˾ Inner ring Tolerances in micrometers Vdp ∆Bs d ∆dmp Diameter series Vdmp Kia Sd Sia(1) VBs mm 9 0,1,2,3,4 max all normal modified(2)0,6 ≤d≤ 2,5 max max 42,5 <d≤ 10 upper lower 4 max max upper lower max10 <d≤ 18 543 4 0 -5 543 7 7 0 -40 -250 5 0 -5 543 7 7 0 -40 -250 5 0 -5 7 7 0 -80 -250 518 <d≤ 30 0 -6 6 5 3 4 8 8 0 -120 -250 530 <d≤ 50 0 -8 8 6 4 5 8 8 0 -120 -250 550 <d≤ 80 0 -9 9 7 5 5 8 8 0 -150 -250 680 <d≤ 120 0 -10 10 8 56 9 9 0 -200 -380 7 78 10 10 0 -250 -380 8120 <d≤ 180 0 -13 13 10 8 10 11 13 0 -300 -500 10180 <d≤ 250 0 -15 15 12250 <d≤ 315 0 -18 18 14 9 13 13 15 0 -350 -500 13 15 20 0 -400 -630 15315 <d≤ 400 0 -23 23 18 12 15(1) Only applies to ball and grooved bearings(2) Relates to the rings of isolated bearings for installation in pairs or per unit.˾ Outer ring Tolerances in micrometers VDp SD(1) ∆Cs VCs SD1(2) ∆C1s(2) VC1s(2) D ∆Dmp Diameter series VDmp Kea Sea(1)(2) Sea1(2) mm 9 0,1,2,3,42,5 ≤D≤ 6 6 <D≤ 18 upper lower max max max max max max max lower max18 <D≤ 30 0 -5 5 4 3 5 8 8 11 5 0 -5 5 4 3 5 8 8 11 5 0 -5 6 5 3 6 8 8 11 530 <D≤ 50 0 -7 7 5 4 7 8 8 11 550 <D≤ 80 0 -9 9 7 5 8 8 10 14 680 <D≤120 0 -10 10 8 5 10 9 11 16 Identical 8120 <D≤ 150 0 -11 11 8 6 11 10 13 18 to ∆Bs 8150 <D≤ 180 0 -13 13 10180 <D≤ 250 0 -15 15 11 7 13 10 14 20 of the inner ring 8 8 15 11 15 21 of the same 10 bearing250 <D≤ 315 0 -18 18 14 9 18 13 18 25 11315 <D≤ 400 0 -20 20 15 10 20 13 20 28 13400 <D≤ 500 0 -23 23 17 12 23 15 23 33 15500 <D≤ 630 0 -28 28 21 14 25 18 25 35 18630 <D≤ 800 0 -35 35 26 18 30 20 30 42 20Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492.(1) Does not apply to bearings with a flange-type outer ring.(2) Only applies to ball and grooved bearings. 25

General DataBearing manufacturing precision (continued) High-precision radial bearings – Tolerance class 4With the exception of tapered roller bearings and thrust bearings. Standard ISO 492.˾ Inner ring Tolerances in micrometers Vdp ∆Bs Ø series Vdmpd ∆dmp ∆ds(1) 9 0,1,2,3,4 Kia Sd Sia(2) VBs maxmm max max all normal modified(2) upper lower upper lower max max upper lower max0,6 ≤d≤ 2,5 0 -4 0 -4 43 2 2,5 3 3 0 -40 -250 2,52,5 <d≤ 10 0 -4 0 -4 43 2 2,5 3 3 0 -40 -250 2,510 <d≤ 18 0 -4 0 -4 43 2 2,5 3 3 0 -80 -250 2,518 <d≤ 30 0 -5 0 -5 5 4 2,5 3 4 4 0 -120 -250 2,530 <d≤ 50 0 -6 0 -6 6 5 3 4 4 4 0 -120 -250 350 <d≤ 80 0 -7 0 -7 7 5 3,5 4 5 5 0 -150 -250 4 80 <d≤ 120 0 -8 0 -8 8 6 45 5 5 0 -200 -380 4120 <d≤ 180 0 -10 0 -10 10 8 56 6 7 0 -250 -380 5180 <d≤ 250 0 -12 0 -12 12 9 68 7 8 0 -300 -500 6(1) These differences apply to diameter series 0, 1, 2, 3 and 4 only.(2) Only applies to ball and grooved bearings(3) Relates to the rings of isolated bearings for installation in pairs or per unit.˾ Outer ring Tolerances in micrometersD ∆Dmp ∆Ds(1) VDp VDmp Kea Sd(2) Sea(2)(3) Sea1(3) ∆Cs VCs Ø series Sd1(3) ∆C1s(3) VC1s(3)mm 9 0,1,2,3,4 upper lower upper lower max max max max max max upper lower max2,5 ≤D≤ 6 0 -4 0 -4 4 3 23 45 7 2,5 6 <D≤ 18 0 -4 0 -4 4 3 23 45 7 2,518 <D≤ 30 0 -5 0 -5 5 4 2,5 4 45 7 2,530 <D≤ 50 0 -6 0 -6 6 5 35 45 7 Identical 2,550 <D≤ 80 0 -7 0 -7 7 5 3,5 5 4580 <D≤120 0 -8 0 -8 8 6 46 56 7 to ∆Bs 3 0 -9 9 7 57 57 8 of the inner 4 0 -10 10 8 58 58120 <D≤150 0 -9 0 -11 11 8 6 10 7 10 10 ring of the 5150 <D≤180 0 -10 11 same bearing 5180 <D≤250 0 -11 14 7250 <D≤315 0 -13 0 -13 13 10 7 11 8 10 14 7315 <D≤400 0 -15 0 -15 15 11 8 13 10 13 18 8Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492.(1) These differences apply to diameter series 0, 1, 2, 3 and 4 only.(2) Only applies to ball and grooved bearings(3) Relates to the rings of isolated bearings for installation in pairs or per unit. 26

High-precision radial bearings – Tolerance class 2With the exception of tapered roller bearings and thrust bearings. Standard ISO 492.˾ Inner ring Tolerances in micrometers d ∆dmp ∆ds Vdp(1) Vdmp Kia Sd Sia(2) ∆Bs VBs mm max max max all normal modified(2)0,6 ≤d≤ 2,5 2,5 1,5 1,52,5 <d≤ 10 upper lower upper lower 2,5 1,5 1,5 max max upper lower max10 <d≤ 18 2,5 1,5 1,5 0 -2,5 0 -2,5 1,5 1,5 0 -40 -250 1,5 0 -2,5 0 -2,5 1,5 1,5 0 -40 -250 1,5 0 -2,5 0 -2,5 1,5 1,5 0 -80 -250 1,518 <d≤ 30 0 -2,5 0 -2,5 2,5 1,5 2,5 1,5 2,5 0 -120 -250 1,530 <d≤ 50 0 -2,5 0 -2,5 2,5 1,5 2,5 1,5 2,5 0 -120 -250 1,550 <d≤ 80 0 -4 0 -4 4 2 2,5 1,5 2,5 0 -150 -250 1,580 <d≤ 120 0 -5 0 -5 5 2,5 2,5 2,5 2,5 0 -200 -380 2,5120 <d≤ 150 0 -7 0 -7 7 3,5 2,5 2,5 2,5 0 -250 -380 2,5150 <d≤ 180 0 -7 0 -7 7 3,5 5 4 5 0 -250 -380 4180 <d≤ 250 0 -8 0 -8 5 5 0 -300 -500 5 84 5(1) These differences apply to diameter series 0, 1, 2, 3 and 4 only.(2) Only applies to ball and grooved bearings(3) Relates to the rings of isolated bearings for installation in pairs or per unit.˾ Outer ring Tolerances in micrometersD ∆Dmp ∆Ds VDp(1) VDp Kea Sd(2) Sia(2)(3) Sia1(3) ∆Cs VCs Sd1(3) ∆C1s(3) VC1s(3)mm max 1,5 upper lower upper lower max 1,5 max max max max upper lower max 22,5 ≤D≤ 6 0 -2,5 0 -2,5 2,5 1,5 1,5 1,5 3 1,5 6 <D≤ 18 0 -2,5 0 -2,5 2,5 1,5 1,5 1,5 3 1,518 <D≤ 30 0 -4 0 -4 4 2,5 1,5 2,5 4 1,530 <D≤ 50 0 -4 0 -4 4 2 2,5 1,5 2,5 4 Identical 1,550 <D≤ 80 0 -4 0 -4 4 2 4 1,5 4 6 to ∆Bs 1,580 <D≤ 120 0 -5 0 -5 5 2,5 5 2,5 5 7 of the inner 2,5120 <D≤ 150 0 -5 0 -5 5 2,5 5 2,5 5 7 ring of the 2,5150 <D≤ 180 0 -7 0 -7 7 3,5 5 2,5 5 7 same bearing 2,5180 <D≤ 250 0 -8 0 -8 8 4 7 4 7 10 4250 <D≤ 315 0 -8 0 -8 8 4 7 5 7 10 5315 <D≤ 400 0 -10 0 -10 10 5 8 7 8 11 7Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492.(1) These differences apply to diameter series 0, 1, 2, 3 and 4 only.(2) Only applies to ball and grooved bearings(3) Relates to the rings of isolated bearings for installation in pairs or per unit. 27

General DataBearing manufacturing precision (continued) Tapered roller bearings - Normal tolerance class˾ Diameter and radial run-out - Inner ring Tolerances in micrometers d ∆dmp Vdp Vdmp Kia mm upper lower max max max 10 ≤d≤ 18 18 <d≤ 30 0 -12 12 9 15 30 <d≤ 50 0 -12 12 9 18 50 <d≤ 80 0 -12 12 9 20 80 <d≤ 120120 <d≤ 180 0 -15 15 11 25180 <d≤ 250 0 -20 20 15 30250 <d≤ 315 0 -25 25 19 35315 <d≤ 400 0 -30 30 23 50 0 -35 35 26 60 0 -40 40 30 70˾ Diameter and radial run-out - Outer ring Tolerances in micrometers D ∆Dmp VDp VDmp Kea mm upper lower max max max 18 ≤D≤≤ 30 30 <D≤ 50 0 -12 12 9 18 50 <D≤ 80 0 -14 14 11 20 80 <D≤ 120 0 -16 16 12 25120 <D≤ 150150 <D≤ 180 0 -18 18 14 35180 <D≤ 250 0 -20 20 15 40250 <D≤ 315 0 -25 25 19 45315 <D≤ 400400 <D≤ 500 0 -30 30 23 50500 <D≤ 630 0 -35 35 26 60 0 -40 40 30 70 0 -45 45 34 80 0 -50 50 38 100Note: The tolerances on the outside diameter, D1, of the flange on the outer ring are given in standard ISO 492. 28