Precision Miniature and Instrument Bearings

1 MINIATUREBEARINGSP recision Miniature and Instrument BearingsNATIONAL Precision bearing Section 1 Part Numbering System ..1-2 & 1-3 Section 2 Interchange Chart ..2-1 & 2-2 Section 3 Basic Dimension Data ..3-1 & 3-2 Section 4 - INCH SERIESR adial Open Bearings ..4-2 Radial Shielded Bearings .

2 4-3 Radial Flanged Open Bearings ..4-4 Radial Flanged Shielded Bearings ..4-5 Extended Inner Ring Radial Open Unflanged & Flanged Bearings ..4-6 Extended Inner Ring Radial Shielded Unflanged & Flanged Bearings ..4-7 Tapered O .D . Radial Flanged Shielded Bearings ..4-8 Section 5 - METRIC BEARINGSL SERIESR adial Open Unflanged & Flanged Bearings ..5-2 Radial Shielded Unflanged & Flanged Bearings ..5-3R SERIESR adial Open Unflanged & Flanged Bearings ..5-4 Radial Shielded Unflanged & Flanged Bearings ..5-5 Section 6 - SPECIALTY PRODUCTSR adial Hi-Speed Specialty Bearings .

3 6-2 & 6-3 Angular Contact Hi-Speed Specialty Bearings ..6-4 Modified Dimension Radial Open Unflanged & Flanged Bearings ..6-5 Modified Dimension Radial Shielded Unflanged & Flanged Bearings ..6-6 & 6-7 Section 7 - ENGINEERINGT echnical Information ..7-2 & 7-3 Shield and Seal Types ..7- 4 Dimensional Control ..7-5 Lubrication ..7- 6 Table of Recommended Fits & Shoulder Diameters ..7- 7 Warranty, Errors & OmissionsNational Precision bearing Group of Mechatronics, Inc. assumes no responsibility for errors or omissions in this catalog. National Precision bearing Group reserves the right to change information or specifications without notice.

4 Application and use of this product is the sole responsibility of the user, however our engineering personnel will advise you of guidelines for the proper parameters of use of the product. National Precision bearing Group warrants the product to be free from defects in materials and workmanship only. Sellers only obligation hereunder is to either repair or replace the defective product or work within 12 months of product delivery to our custom-ers. No other warranties are expressed or implied in fact or by law. National Precision bearing Group is not liable for associated costs of work done by the buyer involving our product, or altered Precision bearing is a division of Mechatronics, 2007 National Precision BearingEmail inquiries to: our online catalogs at: call us at.

5 800-426-8038 MINIATUREBEARINGSP recision Miniature and Instrument Bearings P R E C I S I O N M I N I A T U R E B E A R I N G St mb i g st c n h tBasic Dimension Data3-13-2 Part Numbering System1-21-3 Interchange Chart2-12-2 Basic Dimension Data3-13-21-12 Interchange Chart6 SpecialtyProducts4 Inch Series3 BasicDimension Data1 Part Numbering System5 Metric Bearings7 Engineering1-2 GROUP 1 MATERIALSSSS= AISI stainless steel(440C)No Code= Chrome alloysteel (52100)SE= AISI stainless steelrings (440C) with ceramicballsDD = NMB 400 Seriesmartensitic stainless steelS= 400 Series martensiticstainless steel (Std.)

6 Ref.)DS = 400 Series highperformance stainlesssteel and 440C ballsGROUP 2 TYPERI-RI, R, L= RadialRIF, RF, LF= FlangedradialF= Flanged, tapered , MBR, MBL= Innerring relieved andseparableMBRIF, MBRF, MBLF=Inner ring relieved andseparable, flanged outerringMDRI, MDR, MDL= Innerring relieved and non-separableMDRIF, MDRF, MDLF=inner ring relieved andnon-separable, flangedouter ringMERI, MER, MEL= Outerring relieved and non-separableMERIF, MERF, MELF=Outer ring relieved,flanged and non-separableMBF= Inner ring relievedand separable, outer ringflanged and taperedMDF= Inner ring relievedand non-separable, outerring flanged and 3 BASIC SIZE418 Inch SeriesFirst one or two digitsindicates in 16ths ofan inch.

7 The following twoor three digits indicate thebore size in a fraction ofan inch, the first digitbeing the numerator andthe second or the secondand third digits being SeriesFirst two digits in mm. Second twodigits indicate in (following basic size)Indicates special internaldesign, assigned innumerical : X1, X2, 4 SEALS &SHIELDSZZE nclosuresZ= Single metallic shield-removableZZ= Double metallicshield-removableZO= Single shield on sideopposite flangeD= Single rubber sealDD= Double rubber seal2RS= Two rubber sealsD1= Single Viton sealDD1= Double Viton sealL= Single glass-reinforced PTFE sealLL= Double glass-reinforced PTFE sealLO= Single seal on sideopposite flangeLZ= Glass reinforced PTFE seal and shield with sealon flange sideZL= Shield and glassreinforced PTFE seal withshield on flange sideH= Single metallic shieldnon-removableHH= Double metallicshield non-removableK=

8 Single metallic shieldnon-removableKK= Double metallicshield non-removableS= Single rubber seal,non-contactSS= Double rubber seal,non-contactGROUP 5 MODIFICATIONSE xtended Inner RingEE= Both sidesE= One sideSpecial ExternalDimensionA_ _= Larger thanstandard Semi-standard, largerwidth and bearingA_ _ _ _= Larger standard and specialwidthW= Wider than standardwidthY= Narrower thanstandard widthN= Larger or smaller borethan standardSpecial DesignSD= Special designbearingNote:Radial Load Ratings shown are for 52100 chrome is a Trademark of NMB is a Trademark of the NHBB is a Registered Trademark of Dupont PART NUMBERADDITIONAL SPECIFICATIONS1-3 GROUP 6 PREMIUMFEATURESMC= Premium ball & racefinish for specificapplicationsMT= Noiseless motorqualityGROUP 7 CAGEHCR= Ribbon PTFE coatedF= Full ball complementH= Crown, land pilotedJ= Crown, acetalKB= Crown phenolic,paper baseKC= Crown phenolic, linenbaseKF= Crown phenolic, linen,non keyhole type, outerland pilotingKG= Crown phenolic,paper base, outer landpilotedKM= Full type, phenolic.

9 Linen baseKN= Full type, phenolic,paper baseM4= Full type, polyimideM5= Crown, polyimideR= Ribbon, land pilotedRD= Ribbon, ball pilotedSF= Composite metalpolymer retainer silver T1= Crown, specialtymaterialGROUP 8 ABECTOLERANCEA5A1= ABEC 1*A3= ABEC 3, 3PA5= ABEC 5, 5P, 5TA7= ABEC 7, 7P, 7TA9= ABEC 9, 9 PNote: Selected ABEC 9tolerances are availableon all sizes. Please consultNPB.* A1 Miniature and instrumentbearings of both the metric andinch configurations meet thetolerances of ABMA Standard20 for ABEC 1 metric seriesbearingsGROUP 9 RADIALPLAYP25P= Followed by two,three, or four numbersindicates the radial playlimits in ten thousandthsof an : P25 indicatesradial play of.

10 0002 .GROUP 10 TORQUET= Followed by a numberthat indicates maximumstarting torque inhundreds of mg. : T15 indicates amaximum starting torqueof 1500 mg. Followed by anumber that indicatesmaximum running torquein hundreds of mg. : RT15 indicatesa maximum runningtorque of 1500 mg. 11 LUBRICANTLO2 Lubricant letter codes arefollowed by a number toindicate specific Following lubricantcode indicates barriercoatingLB= Mixture of oil andsolventLD= Dry, no lubricantLF= Dry filmLG= GreasesLM= Mixture of oil andgreaseLO= OilsLY= Expanded list of oilsand greasesGrease Plate Code(follows lubricant code)GPL= LightGPM= MediumGPH= Heavy2-1 This chart is intended as a reference only.