Self-Lube Bearings - מיסבים

1 Self-Lube Bearings | 1- Technical Information Common to all Ranges- Load CalculationsContentsCONTENTSG eneral Technical SpecificationIntroductionInterchange List Self-Lube Silver-Lube Molded-Oil Stainless Steel UnitsLife-Lube (Molded-Oil Insertsin Silver-Lube Housings)Special Products and bearing Solutions- Fast Build Options- Alternative Pre-Greasing Options- Other Insert/Housing Combinations- Special Housing Designs - Special Products Design Options- Matrix- Part numbering system- Technical Specification- bearing Tables- Matrix- Part numbering system- Technical Specification- bearing Tables- Matrix- Part numbering system- bearing Tables- Matrix- Part numbering system- Technical Specification- bearing TablesGENERALTECHNICALSPECIFICATIONCONVE RSIONTABLESSELF-LUBE SILVER-LUBE MOLDED-OIL STAINLESS STEELUNITSLIFE-LUBE SPECIAL PRODUCTSAND BEARINGSOLUTIONSINTERCHANGELISTC onversion Tables- Common Engineering Unit Conversion Tables- Part Number Interchange list| 2 The NSK brand, recognised around the worldFrom home appliances, automobiles, and capital equipment to the aerospace industry NSK Bearings are used in an extensive range of applications.

2 NSK established itsglobal-scale enterprise on technology that has met the exact requirements of globalindustry. We have also established R&D systems and support services to meet the diverse needsof our customers in every continent. As a brand recognised around the world NSK continues to lead industry with its technical is on the move, across the globeHEADQUARTERSA merica(North and South) Ann ArborAsia Shanghai SingaporeEurope MaidenheadJapan TokyoTECHNICAL OFFICESA merica(North and South) Ann ArborAsia KunshanEurope Newark KielceJapan Fujisawa MaebashiPLANTSA merica (North) Ann Arbor Clarinda Franklin Liberty BenningtonAmerica (South) SuzanoAsia Kunshan Anshun Dongguan Zhangjiagang Suzhou Changshu Chennai Jakarta Changwon Balakong Chonburi ChachoengsaoEurope Peterlee Newark Kielce Munderkingen TorinoJapan Fujisawa Hanyu Otsu Konan Takasaki Haruna Maebashi Tanakura UkihaSALES OFFICES Africa JohannesburgAmerica (North) Ann Arbor Indianapolis Chicago San Jose Los Angeles Bennington Miami Atlanta Montreal Toronto VancouverAmerica (South)

3 Buenos Aires Sao Paulo Belo Horizonte Joinville Porto Alegre Recife Mexico CityAsia Beijing Shanghai Guangzhou Anshun Chengdu Hong Kong Taipei Taichung Tainan Seoul Chennai Jakarta Manila Bangkok Kuala Lumpur Prai Johor Bahru Kota Kinabalu SingaporeEurope Maidenhead Newark Coventry Paris Dusseldorf Stuttgart Leipzig Milano Tilburg Barcelona Warsaw IstanbulJapan Tokyo Osaka NagoyaOceania Melbourne Sydney Brisbane Adelaide Perth Auckland27 other offices| 3| 4| 5 GENERAL TECHNICAL SPECIFICATIONSelf-Lube General Technical Specification| 6 NSK manufactures several ranges ofmounted units. These include Self-Lube , our recognised standard, andrecently introduced ranges such asSilver-Lube , Life-Lube and Molded-Oil units. In each type, there are twobasic components, the insert and bearing insertsThe Self-Lube bearing insert, commonlyknown as a wide inner ring bearing ,is designed to suit the wide rangeof housings offered by NSK in theSelf-Lube bearing family and is alsosuitable for applications where the user sown housing is are basically deep-groove ballbearings, to the popular 6200 seriesconfiguration, with integral designfeatures making them more functionaland versatile than standard ball radial internal clearance is C3 forstandard bearing inserts and bearingscan be offered with either parallel orspherical outside diameter outer ringswith the latter being the type fitted in thebearing unit.

4 The integral design featuresof the bearing insert, such as shaftlocking, sealing and lubrication, areexplained in the following bearing unitsThe range of Self-Lube bearing unitsoffers a wide choice of cast iron, pressedsteel, synthetic rubber, thermoplastic orstainless steel housings fitted withspherical outside diameter Self-Lube bearing inserts. They will generallyaccommodate initial housingmisalignment up to radians but arenot recommended for runningmisalignment in excess of product rangeProven single lip seal. M lip seals and flingersalso screw shaft collar andtaper sleeve lock alsoavailable as piece rivetedhigh strength metalcage in steel orstainless seatingto allow for initialmisalignment finishedraceways for quietand one piece high qualitycast iron housing. Also availablein high quality thermoplastic orcast stainless and outerrings throughhardened, highquality steel. Protector for added bearingprotection and safety.

5 Availablein steel for Self-Lube units or plastic for Silver-lube as standard. Molded-Oil options do notrequire general housing types are pillowblocks, flange units, take-up units,cartridge units and hanger units. Choiceis very much determined by therequirements of the application, althoughthe aesthetic appearance of the machinedesign is often an importantconsideration. Self-Lube units havebeen designed to meet the needs of bothcriteria. Cast iron unit castings are made fromhigh-quality cast iron, and finished onunmachined surfaces with anelectrostatic air-drying paint. Pressed steel housings are made frommild steel strip, and are zinc plated. Thermoplastic housings are mouldedin highgrade PBT, a high qualitythermoplastic polyester resin. Stainless steel housings are madefrom austenitic stainless steel castings(SCS13).Additional productsNSK recognises the need for tailormade solutions and is always willing tohelp customers who have a requirementfor something out of the load ratingsThe NSK dynamic load ratings given inthis catalogue and the relationshipbetween these and bearing fatigue lifeare based on ISO standard TECHNICAL SPECIFICATION| 7 GENERAL TECHNICAL SPECIFICATIONB earing load ratingsand enduranceBasic dynamic radial load rating CrThis is defined as the load that can beapplied to the bearing to give a basic L10rating life of one million revolutions.

6 Thisis the life associated with 90% reliabilitywhich has been found by experience tobe acceptable for normal engineeringbearing applications. The majority of thebearings attain a much longer life and themedian life is approximately five timesthe L10life. Ratings for each series aregiven in the bearing tables and are usedto calculate life for radial loads ofconstant magnitude and dynamic radial load PrFor applications where axial and radialloads are present they must beconverted into a single equivalent radialload Prand calculated as follows, where:Fr= actual radial load (N)Fa= actual axial load (N)Y = axial factor from table basic static load ratingCr= dynamic radial load ratingfo= axial load factorNote: Axial load Famust not exceed Select fofrom table for theappropriate bearing obtain the value ofY from table Prwhere: Pr= FrorPr= Fr+ YFaUse whichever Prvalue is the between load and lifeHaving determined the equivalent load Prthe nominal L10 bearing life is calculatedas follows:L10life in hours = where n = bearing operating speed(rev/min).

7 Alternatively, by using the loadingratio the bearing L10life can beestimated by reading off directly from thetables on page 9 under the appropriatespeed static load rating CorThis value is calculated in accordancewith ISO standard 76. Ratings for eachseries are given in the bearing equivalent radial load PorWhen static axial and radial loads areapplied to a bearing these must beconverted to an equivalent static radialload Por where:For= actual static radial load (N)Foa= actual static axial load (N)Calculate Porwhere:Por= FororPor= For+ FoaUse whichever Porvalue is greater, butthis value should not exceedthebearing static radial load rating factorsIt is customary when calculating bearinglife to include application factors whichallow for fluctuations in loading thatoccur in service, and from experience thefollowing may be used as a steady and light shock loadsmultiply load by to moderate shock loads multiply loadby to When selecting the size ofbearing for a given load, the calculatedlife should conform to the L10livesshown in the next column.

8 ()CrPrx10660n3 CrPr Machines in use 8 hours/day notfully utilised 10,000 to 20,000hours Machines in use 8 hours/day fullyutilised 20,000 to 30,000 hours. Machines in use 24 hours/day 40,000 to 80,000 hours. Machines in seasonal use 4,000 to8,000 loadsThe axial load Foamust not exceed halfthe basic static load rating Cor. Housingstrengths must also be considered as alimiting factor - see detail on page bearing | 10| 8 Examples of bearing calculationsGENERAL TECHNICAL SPECIFICATIONE xample 2 With a radial load Fr= 2940N and an axialload Fa= 1470N at 300 rev/min withmoderate shock present, what nominalL10life can be obtained from unitreference SF40?The dynamic radial load rating Crof theunit from page 39 is 29100N and thestatic load rating Coris the bearing is subject to radialand axial loads we have to establish theequivalent load Praccording to page , we establish the value ofUsing this value, from table weestablish a value for Y = page 7 we then calculate the valueof PrPr= 2940 NorPr= (2940) + (1470) = 3925 NUsing the greater value of Prandapplying an application factor of (page 7) for moderate shock loads:Pr= 3925 x 6673 NFrom page 7:L10life hours=== 4607 1 What nominal life can be obtained fromNP55 with a steady radial load Fr=3900N at speed of 1500 rev/min?

9 Thedynamic load rating Crof the unit frompage 25 is 43500N. Since the bearing isnot subject to axial load the equivalentload Pr= Fraccording to the formula onpage 7. Therefore applying the servicefactor of for a steady Frx = 3900 x = page 7,L10life in hours=== 8923 hoursAlternatively, using the loading ratiotables on page 9 an approximate life canbe obtained by locating the nearest value in the appropriate Under the 1500 rev/min column thenearest value is which gives anapproximate life of 10000 hours.()CrPrx106nx603()435004680x1061500 x603 CrPrCrPr435004680== ()CrPrx10660n3()291006673x10660x3003 Alternatively, using the loading ratiotables on page 9, an approximate life canbe obtained by locating the nearest Cr/Prvalue in the appropriate rev/min , Cr/Pr= 29100/6673 = the 300 rev/min column page 9the nearest value is which gives anapproximate life of 5000 strengthTo check the housing strength forexample 2 when the axial loadFa= 1470N and applying an applicationfactor of then:Axial load = 1470 x = 2499 NFrom page 19 we see that the maximumaxial loads for the above unit Corin one direction, and Corin the opposite these two maximum axialloads that may be applied to x 19900 = x 19900 = 4975 From the above it can be seen that thehousing will support the axial load of2499N in either , the unit above is satisfactoryfor the loading conditions is advisable to shoulder the shaftfor high axial loads.

10 | 9 Loading ratiosGENERAL TECHNICAL SPECIFICATIONLife estimation for ball Bearings for different Cr/Prratios and speedsLife estimation for ball Bearings for different Cr/Prratios and speedsL10lifeSpeed: rev/min(hours) : rev/min(hours) | 11 Self-Lube bearing UnitsSELF-LUBE PRODUCT RANGE| 12 Standard unit referencesSELF-LUBE PRODUCT RANGEI nsert TypeHousing TypePage8082838424 NPNP-DECNP-ANP-EC30 SLSL-DECSL-ASL-EC32MP36 SNPSNP-DECSNP-ASNP-EC36 CNPCNP-DECCNP-ACNP-EC38 SFSF-DECSF-ASF-EC40 MSF44 SFTSFT-DECSFT-ASFT-EC46 MSFT50 LFTCLFTC-DECLFTC-ALFTC-EC52 FCFC-DECFC-AFC-EC54 MFC56 STST-DECST-AST-EC58 MST62 BTBT-ABT-EC64 SLCSLC-DECSLC-ASLC-EC66 MSC68 SCHB68 SCH70 SLFESLFE-DECSLFE-ASLFE-EC72 SLFTSLFT-DECSLFT-ASLFT-EC74 SLFLSLFL-DECSLFL-ASLFL-EC76 LPBLPB-DECLPB-ALPB-EC78 LPBRLPBR-DECLPBR-ALPBR-ECCast iron one piecePressed steel two piece1000G1000 DECG1200G1200 ECG| 13 Self-Lube PRODUCT RANGE8890919286 PageTNPTNP-DECNP-FSNP-DECFSNP1000-K28 TSLTSL-DECSL-FSSL-DECFSTMPMP-FSMP1000-K3 4 TSNPTSNP-DECSNP-FSSNP-DECFSTCNPTCNP-DECC NP-FSCNP-DECFSTSFTSF-DECSF-FSSF-DECFSTMS FMSF-FSMSF1000-K42 TSFTTSFT-DECSFT-FSSFT-DECFSTMSFTMSFT-FSM SFT1000-K48