Table of Contents Cylindrical Roller Bearings - …

1 CylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on48 Table of ContentsCylindrical Roller BearingsINTRODUCTIONA bout NSK Cylindrical Roller Bearings ..49 NOMENCLATURE/INTERCHANGEC ylindrical Nomenclature ..50 Cylindrical Interchange ..50 APPLICATIONC ylindrical Applications ..51 bearing TABLESS eries 200 NU, N, NJ, NUP, NF & NH ..52 Series 300 NU, N, NJ, NUP, NF & NH ..54 Series 400 NU, N, NJ, NUP, NF & NH ..56 Series 1000 NU & N ..58 Series 2200 NU, NJ, NUP & NH ..60 Series 2300 NU, NJ, NUP & NH ..62 CylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on49 IntroductionABOUTNSK CYLINDRICALROLLERBEARINGSnNU style single rownN style single rownNJ style single rownNF style single rownNH style single rownNUP style single rownDouble row styles (NN, NNU)Cylindricalroller Bearings are designed to carry heavy radial loads and are suitable for highspeed applications.

2 Their rolling elements are ground to provide maximum contact with theraceway and are precisely crowned to avoid edge loading due to shaft Bearings have two machined flanges on the outer ring and no flangeson the inner ring. The rollers and cages are assembled in the outer ring. Becausethere are no flanges in the inner ring, this bearing cannot carry a thrust Bearings have two machined flanges on the inner ring and no flanges onthe outer ring, with rollers and cage on the inner ring. Like the NU style, the Nhas no thrust load carrying Bearings have two machined flanges on the outer ring and a machinedflange on one side of the inner ring. The Roller and cage assembly is in the outerring. The integral flange on the inner ring allows this bearing to carry an axial Bearings have two machined flanges on the inner ring and one flangeon the outer ring, with Roller and cage on the inner ring.

3 Like the NJ bearing ,these Bearings have some thrust load Bearings have two machined flanges on the outer ring and a machinedflange on one side of the inner ring. A special-design inner ring allows use of astabilizing ring on the non-flange side. As a result, these Bearings can carry axialloads in both directions. The Roller and cage assembly is mounted in the outer Bearings are similar to the NJstyle and come with a special ringoften called a thrust collar. Mounted on the non-flange side of the inner ring, thethrust collar allows the bearing to carry an axial load in both directions. Thethrust collar extends out of the bearing on one side, so the dimension across theinner ring is slightly greater than that of the outer Rowcylindrical Roller Bearings are denoted by two N s within the partnumber ( , NNor NNU).

4 The dimensions for these can be found in the SuperPrecision section of this catalog and can be ordered with standard BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on50 Nomenclature Cylindrical Roller BearingsInterchange Cylindrical Roller BearingsN:NU:NJ:NUP:NF:NH:NN:NNU:Single row, no flanges on outer ringSingle row, no flanges on inner ringSingle row, one flange on inner ringSingle row, NJ style w/locating ringSingle row, one flange on outer ringSingle row, NJ w/stabalizing ringDouble row, no flanges on outer ringDouble row, no flanges on inner ringNJ320 EMC3 Bore Size(04 and up: multiply last two numbers by 5 to get bore in mm)00:10mm04:20mm01:12mm05:25mm02:15mm12 :60mm03:17mm20: 100mmBasic Type2:3:lightmediumSeriesT:M:W:WS:Glass- fiber reinforced polyamide (only available with type E high capacity Bearings )Machined brassPressed steel cagePressed steel for type E high capacity bearingsCage StyleOther Featuresblank: Standard designE: High capacity designInternal ClearanceC2: Tightblank: Normal C3: LooseC4: Extra LoosePlease refer to the bearing tables for exact part number.

5 Electric Motor QualityDESCRIPTIONINTERCHANGENSKSKFFAGSI NGLE ROW, NO FLANGES ON OUTER RINGNNNSINGLE ROW, NO FLANGES ON INNER RINGNUNUNUSINGLE ROW, 1 FLANGE INNERNJNJNJSINGLE ROW, 1 FLANGE OUTERNFNF--SINGLE ROW, 1 FLANGE INNER, WITH RETAINING RINGNUPNUPNUPSINGLE ROW, 1 FLANGE INNER w/STABALIZING RINGNHNHNHSTABILIZING RINGHJHJHJDOUBLE ROW, FLANGES OUTER/FANGES INNERNNU/NNNNU/NNNNU/NNLIGHT2xx2xx2xxMED UM3xx3xx3xxHEAVY4xx4xx4xxEXTRA LIGHT10xx10xx10xxLIGHT, WIDE22xx22xx22xxMEDIUM, WIDE23xx23xx23xxPOLYAMIDE CAGETPTVP2 COMPOSITE HIGH TEMP (200F) CAGET7----MACHINED BRASS CAGEMMM, M1 PRESSED STEEL CAGEW,WSJJP1 HIGH CAPACITY DESIGNEECEFULL COMPLEMENT (NO CAGE)VVVTIGHT CLEARANCEC2C2C2 NORMAL CLEARANCEBLANKBLANKBLANKLOOSE CLEARANCEC3C3C3 EXTRA LOOSE CLEARANCEC4C4C4 Part NumberPrefixPart NumberPart Number SuffixThe competitive manufacturers are provided for a convenient source of unit substitution.

6 They can be considered interchangeable in most instances,but for special applications, please consult NSK Engineering. NSK assumes no liability with respect to errors or BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on51 Cylindrical Roller bearing ApplicationsShown below are some common applications for Cylindrical Roller Bearings . The bearing isdesigned with two flanges on one of the rings to hold the Roller and cage assembly. The otherring is separable with either one flange or none at all. Designs with a flange on the separable ringcan handle light axial loading against that flange. The choice of the ring configuration isdetermined by the mounting and assembly practices for the application.

7 All designs have thesame high radial load capacity and operate at the same limiting Roller BearingsnTraction Motors (NH and NU)nElectric Motors, medium to large sizenPumps and Compressors Centrifugal Pump Deepwell Pump Slurry Pump Screw CompressornPlastic Forming EquipmentnBlowers and FansnGears and DrivesnCoal Pulverizers (NN)nConstruction EquipmentnHeavy EquipmentnMachine Tool SpindlenCalender Rolls of Paper MakingMachinesnTransmissionsnPrinting PressesnMold Oscillator TablesnContinuous Casters, Float EndnTurbinesnCrushersnJournal BoxesnSpeed ReducersnTable Rollers for Steel MillsnOil Field Equipment Pump JackCylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on52 CylindricalRoller bearing 200 SeriesNU, N, NJ, NUP, NF, NH and HJ Stabilizing *Maximum fillet which corner radius of bearing will NumberNominal bearing DimensionsPreferred Shoulder Diameters(for shoulders that contact flanged rings)dD Bra * (in)da (in)Da (in)

8 Mminchmminchmminchmaxminmax Table on page 331 Table thru Table page 314-17 Table and Table page 328-29 Radial Internal ClearanceBearing TolerancesShaft & Housing FitsApplication DataADDPREFIXNU, N, NJ, NUP, NF ORNH FORREQUIREDSTYLES eriesPrefixN StyleCylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on53 BDdNU StyledbDarbraCommon OptionsM: Machined Brass CageW: Pressed Steel CageET: High Capacity Polyamide CageC3: Loose Internal ClearanceCO : Normal Internal ClearanceE: Electric Motor Quality Not shown in part numberBasic Load Ratings(lbs)Limiting Speeds(1000 RPM) bearing Weight (Approx.) *Maximum fillet which corner radius of bearing will Dynamic Radial Load RatingCor= Static Radial Load RatingBearing NumberPreferred Shoulder Diameters(for shoulders that contact unflanged rings)rb* (in)db(in)Db(in)maxminmaxminmaxCrCorGrea seOillbsADDPREFIXNU, N, NJ, NUP, NF ORNH FORREQUIREDSTYLES eriesPrefixStabilizingRingdaDbDbrbraCyli ndricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on54 CylindricalRoller bearing 300 SeriesNU, N, NJ, NUP, NF, NH and HJ Stabilizing *Maximum fillet which corner radius of bearing will NumberNominal bearing DimensionsPreferred Shoulder Diameters(for shoulders that contact flanged rings)dD Bra * (in)da (in)

9 Da (in)mminchmminchmminchmaxminmaxADDPREFIX NU, N, NJ, NUP, NF ORNH FORREQUIREDSTYLES eriesPrefixN Style Table on page 331 Table thru Table page 314-17 Table and Table page 328-29 Radial Internal ClearanceBearing TolerancesShaft & Housing FitsApplication DataCylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on55 BDdNU StyledbDarbraCommon OptionsM: Machined Brass CageW: Pressed Steel CageET: High Capacity Polyamide CageC3: Loose Internal ClearanceCO : Normal Internal ClearanceE: Electric Motor Quality Not shown in part numberBasic Load Ratings(lbs)Limiting Speeds(1000 RPM) bearing Weight (Approx.) *Maximum fillet which corner radius of bearing will Dynamic Radial Load RatingCor= Static Radial Load RatingBearing NumberPreferred Shoulder Diameters(for shoulders that contact unflanged rings)rb* (in)db(in)Db(in)maxminmaxminmaxCrCorGrea seOillbsADDPREFIXNU, N, NJ, NUP, NF ORNH FORREQUIREDSTYLES eriesPrefixStabilizingRingCylindricalRol ler BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling *Maximum fillet which corner radius of bearing will NumberNominal bearing DimensionsPreferred Shoulder Diameters(for shoulders that contact flanged rings)dD Bra * (in)da (in)Da (in)

10 MminchmminchmminchmaxminmaxSeriesCylindr icalRoller bearing 400 SeriesNU, N, NJ, NUP, NF, NH and HJ Stabilizing RingsN Style Table on page 331 Table thru Table page 314-17 Table and Table page 328-29 Radial Internal ClearanceBearing TolerancesShaft & Housing FitsApplication DataCylindricalRoller BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on57 BDdNU StyledbDarbraCommon OptionsM: Machined Brass CageW: Pressed Steel CageET: High Capacity Polyamide CageC3: Loose Internal ClearanceCO : Normal Internal ClearanceE: Electric Motor Quality Not shown in part numberBasic Load Ratings(lbs)Limiting Speeds(1000 RPM) bearing Weight (Approx.) *Maximum fillet which corner radius of bearing will Dynamic Radial Load RatingCor= Static Radial Load RatingBearing NumberPreferred Shoulder Diameters(for shoulders that contact unflanged rings)rb* (in)db(in)Db(in)maxminmaxminmaxCrCorGrea seOillbsADDPREFIXNU, N, NJ, NUP, NF ORNH FORREQUIREDSTYLES eriesPrefixStabilizingRingCylindricalRol ler BearingsIntroductionBallBearingsSpherica lRoller BearingsTaperedRoller BearingsThrustBearingsSplitPillowBlocksS uper PrecisionBearingsRolling MillBearingsLinearMotionEngineeringSecti on58 CylindricalRoller bearing 1000 SeriesNU and *Maximum fillet which corner radius of bearing will NumberNominal bearing DimensionsPreferred Shoulder Diameters(for shoulders that contact flanged rings)dD Bra * (in)da (in)Da (in)