Drawn Cup Needle Roller Bearings & Clutches - vtl.rs

1 Drawn Cup Needle Roller Bearings & ClutchesPageROLLER CLUTCHESN omenclature .. 492 Introduction, Design, Operation .. 494 Identification, Construction,Special Clutches .. 495 Application .. 496-497 Housing Design, Shaft Design .. 497 Installation .. 498 Applied Loads, Lubrication,Temperatures, Backlash, .. 499 Rate of Engagement,Overrun Limit Speed, Inspection .. 499DC Roller CLUTCHEST ypes FC, FCS, FCL-K, RC-FS and RCDimensions, Ratings,Gauging and Mounting .. 500-501DC Roller CLUTCH ANDBEARING ASSEMBLIEST ypes FCB, FCBL-K, RCB-FS and RCBD imensions, Ratings,Gauging and Mounting .. 502-503 PageDRAWN CUP BEARINGSN omenclature .. 356 Introduction .. 358 Identification .. 358 Bore Comparison, Standardand Large Rollers .. 358 Full ComplementBearing Construction .. 359 Caged bearing Construction,Sealed Bearings .. 359 Description of Tabular Data .. 360 Internal Clearances and Fits .. 360 Outer Ring Rotation,Oscillating Motion.

2 360 Installation Procedures .. 361 Inner Rings, Lubrication .. 362 Inspection Procedures .. 362-363 FULL COMPLEMENT ANDCAGED BEARINGSD imensions, Load Ratingsand Mounting .. 364-375 EXTRAPRECISION BEARINGSG auging and Mounting .. 376-377 SEALED Drawn CUP BEARINGSD imensions, Load Ratingsand Mounting .. 378-379 INNER RINGS FORDRAWN CUP BEARINGSD imensions and Mounting .. 380-383 INNER RINGS, INCH SERIES .. 412-415 Metric Inner RingsDimensions .. 452-457with M prefixsignifies closed end inchnominal dimensionsMJH - 18161 - OHBore16 = 16 16 = 1"18 = 18 16 = 1 1 8"with HK prefix, 20 = 20mmWidth12 = 12 16 = 3 4"16 = 16 16 = 1"with HK prefix, 20 = 20 mmBore 5 = 5 16"14 = 14 16 = 7 8"Width12 = 12 16 = 3 4"16 = 16 16 = 1"I R - 1416 - OHPrefixesIRregular widthIRAextended widthSuffixes: limited " width toleranceOHoil holeInner Rings (with 4-digit number for Drawn cup Bearings only)Suffixes: limited availabilityFplastic cageGFgrease fitting, closed endOHoil holeOHEoil hole in closed endDrawn Cup Bearings Inch Nominal DimensionsPrefixesBfull complement of mechanicallyretained Needle rollersGextraprecisionHheavy seriesJcageMclosed endTone sealTTtwo seals356358 Full ComplementFull ComplementMechanically Retained RollersClosed EndINTRODUCTIONB efore selecting individual Bearings the Engineering section of thiscatalog should be reviewed for detailed information concerning.

3 bearing type selection example of life calculation bearing life and reliability lubrication definition of load ratings limiting speeds life and load relationships shaft design effect of raceway hardness housing designIn addition to these general considerations, review the materialwhich follows when selecting Drawn cup prefix letter or letters in the bearing designation for Drawn Cup(DC) Bearings denote whether the Bearings are made to inch or metricnominal dimensions as well as their major construction example, a bearing with metric nominal dimensions isindicated by the code letter F or HK having open ends and letters BKfor closed ends, in the prefix. Letters in the prefix other than HK, BKor F indicate a bearing of inch nominal sizes of inch Bearings are available with either a fullcomplement of rollers or caged rollers. Metric Bearings are availablewith caged rollers as a standard. The use of caged rollers in inchbearings is indicated by the prefix code letter Bearings are available in either of two radial cross larger cross section is indicated by the prefix code letter of the letter H indicates the smaller radial cross major features of dimension and construction are summa-rized in Table addition, there can be other identifying letters which coverspecial modifications.

4 Please consult Torrington Engineering SalesOffice when special modifications are 1 Identifying LettersPrefix Letters in bearing DesignationInch SeriesMetric SeriesSmallerLargerRegularRollerRollerRo llerFull ComplementBBH Mechanically RetainedCagedJJHHK,FJOther prefix letters in inch Bearings denoting major constructionfeatures are:M closed end styleP open end (finger) cageT single sealTT double sealG extra-precisionSince the entire identification code in the bearing designation maynot appear on the bearing itself, the manufacturers parts list oranother reliable source should always be consulted when orderingbearings for service or field replacement to make certain that thecorrect bearing with the correct lubricant is COMPARISON,STANDARD AND LARGER ROLLERSAs noted above, many sizes of Torrington inch Drawn cup needleroller Bearings are made in two series, differing primarily inthe Roller diameter for a given bearing bore.

5 Both series are verycompact and offer very low cross section profiles compared with otherrolling bearing types. The more compact series with the smaller rollersoffers optimum performance with minimum feasible outside diameterfor a given shaft size. The series with larger rollers, designated by theletter prefix H, offers more capacity and better performance at higherspeeds for the same given shaft Complement Bearings Drawn CUP Needle Roller BEARINGS359 CAGE ROTATIONSHAFT ROTATIONROLLER ROTATIONAMPLELUBRICANTSTORAGEROLLER ROTATIONDISTRIBUTES LUBRICANTTO ALL CONTACT SURFACESFULL COMPLEMENT bearing CONSTRUCTIONThe original Drawn cup Needle Roller bearing , as invented andintroduced by Torrington, employs a full complement of rollers. Thefull complement Drawn cup bearing combines maximum capacityand low cost with the advantages of the Drawn outer inward turned lips of the cup are used to mechanically retainthe full complement of Needle rollers to provide positive radialretention of the rollers even though it may be necessary to removethe shaft repeatedly during the servicing of the mechanismemploying the bearing CONSTRUCTIONT orrington caged Drawn cup Bearings have a steel cage whichprovides inward retention of the Needle rollers.

6 The design providesmaximum cage strength consistent with the long life also has available Bearings with other cage with reinforced plastic cages are for use where operatingconditions permit. Before applying Bearings with plastic cagesplease consult Torrington sales or engineering BEARINGST orrington Drawn cup caged Needle Roller Bearings are offeredwith integral seals. The tables of dimensions on pages 378-379indicate those sizes available with lip contact seals which limit thebearing operating temperature between -25 F and +225 F (-30 Cand +110 C). The seal lip design achieves a light and constantcontact with the shaft throughout the range of mounting bearingclearances thereby ensuring positive sealing and low frictional Drawn cup Bearings are intended to retain grease or non-pressurized oil within a bearing while also preventing contaminantsentering the raceway area. These seals are not intended towithstand a pressure differential exceeding 2 psi (14kPa).

7 Details of shaft design for sealed Bearings are given in theEngineering section of this standard lip contact seals are compatible with commonlubricating oils and petroleum based fuels, but they are adverselyaffected by certain fire-resistant hydraulic fluids and most the operating temperature must be outside of the above rangeor if seals are exposed to unusual fluids please consult theTorrington Engineering Sales ComplementFull ComplementMechanically Retained RollersClosed EndCaged,Caged,Cage Retained RollersClosed EndCaged BearingConstructionCaged,Double SealedDRAWN CUP Needle Roller Bearings 360 DESCRIPTION OF TABULAR DATAThe opportunities for interchange of different types and series areseen in the tables of dimensions starting on page 364, wherebearings with the same bore, and width are listed on the sameline in the table. (Sealed DC Bearings are shown on pages 378-379and extraprecision DC Bearings are shown on pages 376-377.)

8 INTERNAL CLEARANCES AND FITSD rawn cup Bearings are manufactured to a degree of precision thatwill satisfy the radial clearance requirements of most total radial clearance of an installed DC bearing results from thebuild-up of manufacturing tolerances of the housing bore, innerraceway and the bearing , as well as the minimum radialclearance required for the Bearings of nominal inch dimensions, the recommendedmounting dimensions will provide correct running clearance for mostapplications. Closer control of radial clearance would be governed bythe user s capability of holding housing and shaft raceway dimen-sional tolerances tighter than the limits shown on the tabular Bearings of nominal metric dimensions, the recommendedmounting dimensions shown on the tabular pages are consistent withISO N7 housing bore and h6 inner raceway tolerances. Whencloser control of clearance is required, the user may select N6housing bore and h5 inner raceway drawing illustrates the manufacturing tolerances and thebuilt-in clearances applying to medium size Drawn cup Bearings inrotating applications when using the recommended tabulatedmounting clearance in a mounted bearing may be more closelycontrolled by reducing the manufacturing tolerances of the housingbore and inner raceway diameter.

9 Where extremely close control ofradial clearance is required for Bearings of nominal inch dimensions,extraprecision full complement Bearings are RING ROTATIONFor applications where the outer ring rotates with respect to the load,it is recommended that both the housing bore and the inner racewaydiameter be of nominal inch dimensions should have the housingbore and inner raceway diameter reduced by .0005" or .013 of nominal metric dimensions should follow ISO R7 andf6 tolerance MOTIONA pplications involving oscillating motion often require reduced radialclearances. This reduction is accomplished by increasing the shaftraceway diameters as shown in Tables 2 and 3. The metric bearinguser should note that addition of these values to the h6 tolerancesgiven in tables of dimensions results in a standard j6 2 Nominal inch bearing oscillating shaft sizeshaft sizeaddinchmminchmm3 32 to 3 16 to 4 to 1 7 8 to to 5 1 2 to 3 Nominal metric bearing oscillating shaft sizeshaft sizeaddmminchmminchover 3 to 6over.

10 1181 to . 6 to 10over .2362 to . 10 to 18over .3937 to . 18 to 30over .7087 to 30 to 50over to 50 to 80over to Tolerances and Built-in Clearances Drawn CUP Needle Roller BEARINGSM anufacturing tolerancefor bearing mmHousing boretolerance mmManufacturing tolerancefor bearing .0009 boretolerance .0010 :HK-1516bearingreference:J-1616bearingSh aft diametertolerance .0005 initial radialclearance .0005 diametertolerance mmMin. initial radialclearance mm361 INSTALLATION PROCEDURESA Drawn cup bearing must be pressed into its housing. An installa-tion tool similar to the one illustrated must be used in conjunctionwith a standard is advisable to utilize a positive stop on the press tool to locatethe bearing properly in the housing. The assembly tool should havea leader or pilot, as shown, to aid in starting the bearing true in installation tool must be coaxial with the housing bore.