Angular Contact Ball Bearings - Single Row - Regular

1 B 47B 46 Table 1 Standard Cages for Angular Contact Ball Bearings ContactangleANGULAR Contact BALL BEARINGSSINGLE-ROW AND MATCHEDANGULAR Contact BALL BEARINGSBore Diameter 10 50mm B50 Bore Diameter 60 120mm B56 Bore Diameter 130 200mm B62 DOUBLE-ROW Angular CONTACTBore Diameter 10 85mm B66 BALL BEARINGSFOUR-POINT Contact BALL BEARINGSBore Diameter 30 200mm B68 DESIGN, TYPES, AND FEATURESSINGLE-ROW Angular Contact BALL BEARINGSS ince these Bearings have a Contact angle, they can sustain significant axialloads in one direction together with radial loads. Because of their design, whena radial load is applied, an axial force component is produced; therefore, twoopposed Bearings or a combination of more than two must be the rigidity of Single -row Angular Contact ball Bearings can beincreased by preloading, they are often used in the main spindles of machinetools, for which high running accuracy is required.

2 (Refer to Chapter 10,Preload, Page A96).Usually, the cages for Angular Contact ball Bearings with a Contact angle of30 (Symbol A) or 40 (Symbol B) are in accordance with Table 1,butdepending on the application, machined synthetic resin cages or moldedpolyamide resin cages are also used. The basic load ratings given in thebearing tables are based on the cage classification listed in Table the figures in the bearing tables (Pages B50 to B61; bearing borediameters of 10 to 120) show Bearings with Single -shoulder-type inner rings,both-shoulder-type Bearings are also available. Please consult NSKfor moredetailed addition, for Bearings with the same serial number, if the type of cagesare different, the number of balls may also be different.

3 In such a case, theload rating will differ from the one listed in the bearing Contact Ball Bearings with Contact angles of 15 (Symbol C) and25 (Symbol A5) are primarily for high precision or high speed applications,and machined brass or synthetic resin cages or molded polyamide cages maximum operating temperature of molded polyamide cages is 120 Steel CagesMachined Brass Cages79A5, C 7900 794070A7000 70187019 704070C 7000 702272A, B7200 72227224 724072C 7200 724073A, B7300 73207321 7340 FigureArrangementFeaturesB 49B 48 Table 2 Types and Features of Matched Angular Contact Ball BearingsMATCHED Angular Contact BALL BEARINGSThe types and features of matched Angular Contact ball Bearings are shownin Table Angular Contact BALL BEARINGSThis is basically a back-to-back mounting of two Single -row angularcontact ball Bearings , but their inner and outer rings are each integrated intoone.

4 Axial loads in both directions can be sustained, and the capacity tosustain moments is good. This type is used as fixed-end cages are pressed Contact BALL BEARINGSThe inner ring is split radially into two pieces. Their design allows onebearing to sustain significant axial loads in either Contact angle is 35 , so the axial load capacity is high. This type issuitable for carrying pure axial loads or combined loads where the axial loadsare cages are made of machined FOR USE OF Angular Contact BALLBEARINGSU nder severe operating conditions where the speed and temperature areclose to their limits, lubrication is marginal, vibration and moment loads areheavy, they may not be suitable, particularly for certain types of cages.

5 Insuch a case, please consult with if the load on Angular Contact ball Bearings becomes too small, or ifthe ratio of the axial and radial loads for matched Bearings exceeds e (eislisted in the Bearings tables) during operation, slippage occurs between theballs and raceways, which may result in smearing. Especially with largebearings since the weight of the balls and cage is high. If such loadconditions are expected, please consult with NSKfor selection of AND RUNNING ACCURACYSINGLE-ROW Angular Contact BALL Bearings Table (Pages A60 to A63)MATCHED Angular Contact BALL Bearings Table (Pages A60 to A63)DOUBLE-ROW Angular Contact BALL Bearings Table (Pages A60 to A63)FOUR-POINT Contact BALL Bearings Table (Pages A60 to A63)RECOMMENDED FITSSINGLE-ROW Angular Contact BALL Bearings Table (Page A84)Table (Page A85)

6 MATCHED Angular Contact BALL Bearings Table (Page A84)Table (Page A85)DOUBLE-ROW Angular Contact BALL Bearings Table (Page A84)Table (Page A85)FOUR-POINT Contact BALL Bearings Table (Page A84)Table (Page A85)INTERNAL CLEARANCESMATCHED Angular Contact BALL Bearings Table 9. 17 (Page A94)Matched Angular Contact ball Bearings with precision better than P5areprimarily used in the main spindles of machine tools, so they are used with apreload for rigidity. For convenience of selection, internal clearances areadjusted to produce Very Light, Light, Medium, and Heavy Preloads. Theirfitting is also special. Concerning these matters, please refer to Tables (Pages A98 and A99).

7 The clearance (or preload) of matched Bearings is obtained by axiallytightening a pair of Bearings till the side faces of their inner or outer rings arepressed against each Angular Contact BALL BEARINGSFor the clearance in double-row Angular Contact ball Bearings , pleaseconsult with Contact BALL Bearings Table (Page A94)LIMITING SPEEDSIn cases of Single -row and matched Angular Contact ball Bearings , theLimiting speeds listed in the bearing table are for Bearings with machinedcage. For those with pressed cages, the listed speeds must be reduced by20%.The limiting speeds of Bearings with Contact angles of 15 (Symbol C) and25 (Symbol A5) are for Bearings with precision of P5 and better (withmachined synthetic-resin cages or molded polyamide cages).

8 The limiting speeds listed in the bearing tables should be adjusteddepending on the bearing load conditions. Also, higher speeds are attainableby making changes in the lubrication method, cage design, etc. Refer to PageA37 for detailed (DB)(Example)7208 A DBRadial loads and axial loads in both directionscan be the distance between the effective loadc entersa0i s bi g , t h i s t y p e is s u it a b le i fmoments are (DF)(Example)7208 B DFRadial loads and axial loads in both directionscan be with the DB Type, the distancebetween the effective load centers is small, sothe capacity to sustain moments is inferior tothe DB (DT)(Example)7208 A DTRadial loads and axial loads in one directioncan be sustained. Since two Bearings share theaxial load.

9 This arrangement is used when theload in one direction is 50 Angular Contact BALL BEARINGSSINGLE/MATCHED MOUNTINGSBore Diameter10 17 mmB 517900 A5 DBDFDT4 7002 90047529632 00043 CDBDFDT4 9003 05050031038 00053 ADBDFDT8 7505 20089053024 00034 CDBDFDT8 6505 00088051036 00050 ADBDFDT8 8005 40090055522 00030 BDBDFDT8 1005 00082551016 00022 CDBDFDT8 8005 20089553032 00045 ADBDFDT15 1008 6001 54088016 00022 BDBDFDT14 2008 1001 45082514 00020 A5 DBDFDT5 2003 55053036030 00043 CDBDFDT5 4503 70055538036 00050 ADBDFDT9 4005 95095561022 00030 CDBDFDT9 4005 80096059032 00045 ADBDFDT13 0008 0501 33082020 00028 BDBDFDT12 1007 5001 23076515 00020 CDBDFDT12 8007 7001 31078530 00040 ADBDFDT15 4009 0001 57091515 00020 BDBDFDT14 4008 4001 46085513 00018 A5 DBDFDT7 4005 05075551526 00034 CDBDFDT7 7505 30079054030 00043 ADBDFDT9 9506 8501 01070019 00026 CDBDFDT10 1006 7501 03069028 00038 ADBDFDT14 0009 3001 43095018 00024 BDBDFDT12 9008 6001 31087513 00018 CDBDFDT14 1009 0501 44092526 00036 ADBDFDT21 80014 2002 2201 44013 00017 BDBDFDT20 20013 2002 0601 34011 00015 A5 DBDFDT7 7505 60079057024 00032 CDBDFDT8 1505 85083060028 00038 ADBDFDT10 4007 6501 06078017 00024 CDBDFDT10 7007 6001 10077526 00034 ADBDFDT17 60012 0001 7901 22016 00022 BDBDFDT16 10011 0001 6501 13011 00015 CDBDFDT17 60011 7001 8001 19022 00032 ADBDFDT25 90017 3002 6401 76011 00015 BDBDFDT24 00016 0002 4501 64010 00014 Numbers (2)

10 SingleDuplexAbutment and FilletDimensions(mm)daDaraminmaxmaxAbutm ent and FilletDimensions(mm)db(3)Dbrb(3) 8801 450294148 40 00056 0001 00063 3502 600550266 32 00043 3002 00063 4002 710555276 28 00038 0002 500510255 20 00028 4002 00056 3004 300950440 20 00026 7504 050890410 18 00024 2001 770325181 38 00053 3501 00063 8002 980590305 28 00038 8002 00056 0004 050815410 26 00034 4503 750760380 18 00026 9003 00050 4504 500965460 18 00024 8504 200900425 16 00022 5502 530465258 32 00043 7502 00053 1003 450625350 24 00032 2503 00048 6504 650880475 22 00030 9504 300810440 16 00022 6504 00045 4007 1001 370720 16 00022 5006 6001 270670 14 00019 7502 800485286 30 00040 0002 00048 4003 800655390 22 00030 6003 00043 8006 0001 100610 20 00028 9505 5001 010565 14 00019 9005 8501 00038 9008