FFaallkk™™ AA++PPlluuss®® PPaarraalllleell HHeeaavvyy--DDuuttyy DDrriivveess ffoorr HHeeaavvyy--DDuuttyy && RRiigghhtt--AAnnggllee SShhaafftt DDrriivveess AApppplliiccaattiioonnss ((EEnngglliisshh--MMeettrriicc)) FALK A+PLUS Site proven drives for the most demanding applications Falk A+Plus parallel-shaft drives feature super-rugged designs to standards, andstringent quality con- meet every operating challenge. And they’re site-proven in the trols develop “mesh-accurate” gearing that assures exceptionally world’s most demanding applications to take plenty of tough, smooth and quiet operation and on-the-job punishment. extended service life. Application-engineered to maximize strength and minimize wear, A+PLUS “TOUGH” STEEL HOUSINGS and to extend service life, these drives deliver steady, trouble-free A Falk exclusive. Rugged, operation, day-after-day. They’re also specially designed and all-welded steel housings simplify rebuild or bearing replacement. constructed to offer you maximum features and flexibility. Extra strength and rigidity to maintain accurate gear alignments. A+Plus Smart Features REDUCED DOWN TIME – At 200°F (93°C) Falk A+Plus Viton oil-seals FALK MAGNUM “NO-LEAK” SEALS FALK SUPERIOR “HIGH have 18 times the operating life of Falk’s exclusive labyrinth-design, STRENGTH” GEARING – A+Plus conventional Nitrile seals. non-wearing Magnum seal keeps oil gearing is engineered to exceed in and dirt out. A purgeable grease AGMA requirements. Coarse pitch chamber with, in most cases a helical gears (25° pressure angle) Viton contact seal, prevents the are protuberance hobbed, case infiltration of dirt and grime. A carburized, and finish ground with unique drainback passage combines lead and profile modifications that with a radial and axial bush seal to assure full contact under load. retain oil and eliminate leaks. These modifications, when Tandem lip type seals are used for combined with housing bore high oil level requirements. accuracy and assembly quality, Manufacturer’s seal numbers are provide gear mesh performance that published for local sourcing. is equivalent to gearing with a LOWER COSTS – A+Plus standard features significantly reduce long-term costs of maintenance and repair downtime. quality 12 level. Spiral bevel gears are case carburized, shot peened and finish skived. A+Plus gears can take the shock, where others fail. A+PLUS “MESH ACCURATE” QUIET OPERATION – A+Plus advanced dynamic design, superior manufacturing and assembly 2 PRODUCT FLEXIBILITY FOR THE JOB SUPERIOR GEAR BOX EFFICIENCY Falk A+Plus Gear Drives are used Dynamic design plus manufactur- Type ARJ worldwide in a broad range of ing accuracy. Helical gearing offers industries and applications. They up to 99% gear-mesh efficiencies. are available in horizontal or Longer-Life Bearings – Sized for vertical arrangements with solid or exceptional performance under hollow low speed shaft for foot, worst load conditions. Readily flange, or shaft mounting. available tapered or roller bearings. We can meet requirements to Published manufacturer numbers 19,000 Hp/ 15000 kW and catalog for local sourcing. torque ratings to 5,600,000 lb-in/ High-Strength Shafts – Accurate 630,000 Nm with speed ratios Type ABXD support. High stiffness and shock from 1.8:1 to 437.9:1. resistance. OTHER STANDARD FEATURES Convenient Inspection – Removable covers or plugs permit inspection of Filtered Air Breathers – No Positive Lubrication – Oil splash rotating members. pressure buildup. No contaminants. feed or pump lubrication to all rotating elements. UNIVERSAL HOUSING FEATURES Mounting Flexibility – Symmetrical tub/cover housing adapts to vertical or horizontal mounting; allows ready access to all rotating ele- ments. Positive Lubrication for Vertical Mountings – Motor-driven external pump with filter and flow switch provides constant oil flow. No-Leak Drywell – Positive oil retention in vertical low speed shaft applications. Hollow Output – Available for horizontal and vertical configurations. 3-Year Heavy-Duty Warranty A+Plus is backed by the industry’s first standard 3-year warranty, providing full “shaft-to-shaft” protection on all Falk components - including bearings and seals. 3 AA++PPlluuss HHeeaavvyy--DDuuttyy DDrriivveess –– SSeelleeccttiioonn GGuuiiddee 4 Selection Guide M131-110, March 2007 Table of Contents mechanicalservicefactorfortheapplication.Thecustomermust assumetheresponsibilityofisolatingthegeardrivefromanyvibratory BasicInformation .................................5 ortransientloadinducedbythedrivenequipment. ConditionsAffectingSelection........................6 InstallandoperateFalk™productsinconformancewithapplicable MechanicalServiceFactors ........................7-8 localandnationalsafetycodesandperRexnordinstallationmanuals HowtoSelect....................................9 whichareshippedwithgeardrivesandarealsoavailableupon ThermalFactors&Procedures.......................10 request.Suitableguardsforrotatingmembersmaybepurchasedfrom SelectionExamples...............................11 Rexnordasoptionalaccessories.ContactFactoryforcompletedetails. Accessory&OptionInformation...................12-14 Nomenclature ..................................15 PeopleConveyingEquipment SelectionofFalk™productsfor HowtoOrder...................................16 applicationswhoseprimarypurposeisthetransportationofpeopleis ParallelShaftTypeAGearDrives notapproved.Thisincludessuchapplicationsasfreightorpassenger Assemblies&Rotations...........................17 elevators,escalators,manliftplatformsandskitowsandskilifts. Power&TorqueRatings........................18-33 Iftheprimarypurposeoftheapplicationismaterialconveyanceand BasicThermalRatings.........................34-37 occasionallypeoplearetransported,theRexnordwarrantymay OverhungLoadRatings&ThrustCapacity ..........38-45 remainineffectprovidedthedesignloadconditionsarenotexceeded ExactRatios ................................46-47 andcertificationtotheappropriatesafetycodesandloadconditions Dimensions.................................48-64 hasbeenobtainedbythesystemdesignerorenduserfromthe RightAngleShaftTypeABGearDrives appropriateenforcementauthorities. Assemblies&Rotations...........................65 Power&TorqueRatings........................66-75 GearDriveRatingsAllgeardriveratingsinthisselectionguideallow BasicThermalRatings.........................76-78 100%overloadforstartingloadsandmomentaryoverloadsfor OverhungLoadRatings&ThrustCapacity ..........79-82 electricmotordrivenapplicationsoperating10hoursperdayunder ExactRatios...................................83 uniformconditions(unityServiceFactor).Forotherconditions, Dimensions.................................84-95 computeanequivalentpowerbymultiplyingtheactualpower Availability&CompatibilityofAccessories............96-97 requiredfortheapplicationbytheappropriateServiceFactor. AccessoriesDimensions........................98-109 GearDriveBasicThermalRatingsGeardrivebasicthermalratings HollowLowSpeedShaftDimensions..............110-111 statedinthisselectionguidearebasedonthefollowingassumed MCFCouplings(MomentConnection) ............112-113 conditions: ConversionFactors..............................114 Headquarters&GlobalSalesOffices.................116 Ambienttemperatureis25°C(77°F),altitudeabovesealevelis0to 750meters,ambientairvelocityisbetween0,5m/sand1,4m/s (typicalofalargeindoorroom),inletwatertemperatureis20°C (68°F)whencoolingtubesareoffered,anddutycycleiscontinuous. ThermalFactors&Procedures,Page10,permitthecalculationofan applicationadjustedthermalratingforthegeardrivewhenlocal thermalconditionsaredifferentthanthosestatedabove.Itisnot necessarytoapplythemechanicalservicefactortothebasicthermal ratingwhendeterminingthethermaladequacyofageardrive. FactoryWarranty We’resoconfidentintheperformanceand InterpolationofGearDriveMechanicalPowerRatingsand reliabilityoftheseFalkheavy-dutygeardrivesthatwe’rebacking TorqueRatingsWhenthehighspeedshaftrpmforanactual thiscomprehensiveofferingwiththebeststandardwarrantyinthe applicationfallsbetweentwotabulatedhighspeedshaftrpm’sfound business.Ourfull,3-yearHeavy-DutyWarrantyprovides intheselectiontables,interpolatetodeterminegeardriverating. “shaft-to-shaft”protectiononallFalkcomponents–including bearingsandseals(warrantyextendsfor3yearsfromdateof StoredandInactiveDrives Eachgeardriveisspin-testedwitharust shipment).It’sanindustryfirst...andonemorepowerfulreason preventiveoilthatwillprotectpartsagainstrustforaperiodof4 whyRexnordisyourultimatebottom-linevalue. monthsinanoutdoorshelteror12monthsinadrybuildingafter shipmentfromRexnord. Basic Information Periodicallyinspectstoredorinactivedrivesandsprayinternalparts withrustinhibitoreverysixmonthsormoreoften,ifnecessary.Drain oilbeforeaddingrustinhibitor.Indoordrystorageisrecommended. Safety Notes Drivesorderedforextendedstoragecanbetreatedat Rexnordwitha specialpreservativeandsealedtorust-proofpartsforperiodslonger Falk™GearDrives TheFalkandRexnordnameonthegear thanthosecitedabove,ifspecifiedontheorder. driveisthepurchaser’sassurancethatthedrivewasengineered, ratedandmanufacturedtosounddesignpractices. RefertoRexnordServiceManual128-014forpreparationofstored andinactivegeardrives. Thepowersuppliedtothegeareddrivemustbeequaltoorlessthan thepowerforwhichthedrivewasselectedusingtheappropriate Falk™Renew Nothinglastsforever.Noteven™Products.Buteven afteryearsofharduse,yourFalkequipmentcanberestoredto fully-warranted,asnewcondition. Copyright1997,2007,RexnordIndustries,LLC.AllRightsReserved.LithoinU.S.A. FALK,A-PLUS,LIFELIGN,OMNIBOX,RAM,RENEW,STEELFLEX,andULTRAMITE Falk™RenewcanrepairorrebuildyourwornordamagedFalk™ areregisteredtrademarks. equipmenttotheoriginalspecificationspreservedinRexnord MagnumSealisatrademarkofRexnord.Vitonisaregisteredtrademarkofthe engineeringfiles.Quicklyandeconomically.CallRexnordora DuPontCo. RexnordDistributorfordetails. Thecontentsofthisselectionguidearesubjecttochangewithoutnoticeor obligation.Informationcontainedhereinshouldbeconfirmedbeforeplacingorders. ©RexnordIndustries,LLC,1997,2007. (M131-110)5 Conditions Affecting Selection Non–Standard Selection ApplicationAdjustedThermalRating,Page10.The ApplicationAdjustedThermalRatingistheactualpowerthata Procedures geardrivewilltransmitcontinuallyfor3hoursormorewithout overheating.Althoughitisnotnecessarytoapplythemechanical Someapplicationsrequirespecialprocedures,orarereferredtoFactory. servicefactorwhendeterminingthermaladequacyofagear drive,theApplicationAdjustedthermalRatingconsidersthermal ExcessiveOverloads Themaximummomentaryorstartingload factorsassociatedwiththeapplicationthatwillaffecttheabilityof appliedtothegeardrivemustnotexceed200%oftheratedload thegeardrivetodissipatethermalenergy.Thesethermalfactors capacityofthegeardrive(100%overload).Ratedloadcapacity includeambienttemperature,altitudeabovesealevel,ambient ofthegeardriveisdefinedasthepowerratingpublishedinthis airvelocity,inletwatertemperature(whencoolingtubesare selectionguidewithamechanicalservicefactorof1,00.Ifthe offered),anddutycycle.ThermalfactorsonPage10areusedto actualmaximummomentaryorstartingloadexceedsthe adjusttheBasicThermalRatingwhendeterminingtheApplication conditionsstatedabove,calculateanequivalentinputpower AdjustedThermalRating. associatedwiththeexcessiveoverloadbydividingthemaximum overloadbytwo.Thegeardriveselectedmusthavearatedload Acheckoftheapplicationadjustedthermalratingversustheactual capacityequaltoorgreaterthantheequivalentinputpower. powertransmittedisnecessaryforthefollowingapplications: (cid:2) Continuousdutyapplicationwherethegeardriveruns ReversingService Applicationsinvolvingeithermorethan20 continuouslywithoutshutdownfor3hoursormoreperday. reversalsper10hourperiod,orlessthan20reversalsper10 hourperiodwithpeaktorquesgreaterthan200%ofnormalload (cid:2) Intermittentdutyapplicationswherethegeardriveoperates mustbereferredtoF. for3hoursormoreperday,andruntimeintervalsexceed thedurationoftheimmediatelyfollowingshutdownintervals. BrakeEquippedApplications Whenageardriveisequipped Ifanyruntimeintervalequalsorexceeds3hours,the witha“working”brakethatisusedtodeceleratethemotionof applicationisconsideredcontinuousduty. thesystemandthebrakeislocatedbetweentheprimemover Thedutycyclefactorpermitsanupwardadjustmentofthebasic andthegeardrive,selectthegeardrivebasedonthebrake thermalratingassociatedwithintermittentdutyapplications ratingorthehighestequivalentinputpower,whicheverisgreater. above,andtakesintoaccountsimplythe%operatingtimeper Ifthebrakeisusedforholdingonlyandisappliedafterthe hourofthegeardrive,regardlessofdurationrelationship motionofthesystemhascometorest,thebrakeratingmustbe betweenruntimeintervalsanddowntimeintervals,andprovided lessthan200%oftheratedloadcapacityofthegeardrive nospecificruntimeintervalexceedsonehourinduration. selectedfortheapplication.Ifthebrakeratingisgreaterthan 200%oftheratedloadcapacity,refertheapplicationtoFactory. Othershortintervalintermittentdutyapplications,notmeeting AlsorefertoRexnordallapplicationsinwhichthebrakeis criteriastatedabove,maygenerateonlymodestthermalenergyto locatedattheoutputshaftofthegeardrive. bedissipatedbythegeardrive.Referfullapplicationdetailsto Factoryforselectionoftheminimumcoolingmethodthatis OversizePrimeMovers RecommendedMechanicalService adequate. Factorsdonotcoverapplicationsthatrequireoversizeprime moversforhighenergyorpeakloads.Refersuchapplicationsto EffectsofSolarEnergy Ifadriveoperatesinthesunatambient Rexnordforselectionofsuitablegeardrives. temperaturesover38ºC(100ºF),thenspecialmeasuresmustbe takentoprotectthedrivefromsolarenergy.Thisprotectioncan SpeedVariationorMulti-SpeedApplications—Thegear consistofacanopyoverthegeardriveorreflectivepaintonthe drivesofferedinthisselectionguide(exceptTypesAXV&ABX)are geardrive.Ifneitherispossible,aheatexchangerorother designedtooperatewithsplashlubricationonanysinglespeed coolingdevicemayberequired. applicationandanyratioshownintheselectionguideunless otherwisenoted.Itisessentialthatallordersindicatethe OverhungLoadsandThrustLoads Theoverhungloadandthrust operatingspeedrequirementsandratiosothattheproper loadratingspublishedinthisselectionguidearebasedona internaloildistributionaccessoriescanbesuppliedforthe mechanicalservicefactorof1,00andacombinationofthemost specificspeed.TypesAXVandABXuseaseparatemotordriven unfavorableconditionsincludingdirectionofrotation,radialdirection oilpumptoprovidelubrication. oftheoverhungload,andtorsionalloadtransmittedbythegeardrive. Ifthecalculatedoverhungloadexceedsthepublishedvalue,orifan Falk™geardrivesareassembledwithavarietyofstandard overhungloadandthrustloadareappliedsimultaneouslytoashaft, internallubricationcomponentssuchasoilpansandoiltroughs refercompleteapplicationdetailstoFactory.Formoreinformation toensurepropersplashlubrication.Inaddition,differentoil refertotablesandguidelinesonPages38-45and79-82. levelsarenecessaryforvariousgeardrivesizes,speedsand ratios.Consequently,tooperateanexistinggeardriveatdifferent ProductModifications Rexnordcansupplyspecialproduct speedsfromthoseshownonthenameplate,fullapplicationand modificationstosuityourapplicationneeds.Contactyourlocal nameplateinformationmustbereferredtoRexnordforreviewof RexnordAccountExecutiveforhousingmodifications,special thelubricationsystem. ratios,specialshafts,specialmountingorientations,accessory modificationsandotherspecialapplicationrequirements. Allvariableormulti-speedapplicationswillbereferredtothe EngineeringDepartmenttospecifylubricationcomponentsfor SealHousingGrease Allgeardrives(andbackstopsif adequatelubricationattheslowestspeed,withoutexcessive required)willbeshippedwithNLGI#2greaseintheseal temperatureorchurningatthehighestspeed.Itisessentialthat housingcavities.Wherethisgreasecouldcontaminateproducts allordersindicateminimumandmaximumspeeds,aswellasthe producedbycustomerprocesses,suchasinthefoodanddrug speeddurationcycles.Aseparatemotor-drivenoilpump(atan industries,clearlyindicateonyourpurchaseorderthat,“Gear extracharge)mayberequired. drivesealhousingcavitiesmustnotcontaingrease.” Whenselectinggeardrivesformulti-speedorvariablespeed OilPumpEquippedApplicationWhenageardriveis applications,determinethespeedatwhichthegreatesttorqueis equippedwithanexternalmotordrivenoilpump,suchasanAXV developedandselectthegeardriveonthisbasis.Ifthespeedis orABX,andtheambienttemperaturefallsbelow10°C(50°F),or notlistedintheselectiontable,interpolatetodeterminethegear theoilviscosityisinexcessof8000SSU,anoilheatermaybe driverating. requiredtomaintainasatisfactoryflowrateatstartuptoprevent bearingfailure.ConsultRexnord. 6(M131-110) ©RexnordIndustries,LLC,1997,2007. 1 MechanicalServiceFactorconversions Mechanical Service Factors Table 2 Table2or3 3to10Hours Over10Hours Intermittent–Upto Table listed by industry 3to10Hour perDay perDay 3HoursperDay† Service Multi-Cyl. Multi-Cyl. Multi-Cyl. forelectricmotor,stemturbineorhydraulicmotordrives.. Factor Engine‡ Engine‡ Motor Engine‡ recommendationsareMINIMUMandnormalconditions 1,00 1,25 1,50 1,00 1,00 areassumed. 1,25 1,50 1,75 1,00 1,25 1,50 1,75 2,00 1,25 1,50 Service Service 1,75 2,00 2,25 1,50 1,75 Application 3to Over Application 3to Over 2,00 2,25 2,50 1,75 2,00 10 10 10 10 † Forapplicationsoperatingonehalfhourorlessperdayandapplicationsdriven Hour Hour HourHour bysinglecylinderengines,refertoFactory. ‡ Theseservicefactorsarebasedontheassumptionthatthesystemisfreefrom BOTTLINGANDBREWING FourdrinierRolls— seriouscriticalandtorsionalvibrationsandthatmaximummomentaryorstarting BottlingMachinery.......... 1,00 1,25 Lumpbreaker,WireTurning BrewKettles,ContinuousDuty. 1,25 1,25 Dandy&ReturnRolls...... ... 1,25 loadsdonotexceed200%ofthenormalload. CanFillingmachines........ 1,00 1,25 Jordan.................. ... 1,50 Cookers—ContinuousDuty... 1,25 1,25 KilnDrive................ ... 1,50 MashTubs—ContinuousDuty. 1,25 1,25 Mt.Hope&PaperRolls...... ... 1,25 ScaleHoppers—FrequentStarts 1,25 1,50 Platter .................. ... 1,50 CLAYWORKINGINDUSTRY Presses(Felt&Suction) ...... ... 1,25 Pulper(Continuous)......... ... 2,00 BrickPress ............... 1,75 2,00 Repulper(HeavyShock)...... ... 2,00 Occasionalandintermittentserviceorenginedrivenapplications BriquetteMachines......... 1,75 2,00 Reel(SurfaceType)......... ... 1,25 ClayWorkingMachinery 1,25 1,50 Screens Formulti-cylinderenginedrivenapplicationsandallapplications PugMills ................ 1,25 1,50 Chip&Rotary............. ... 1,50 DISTILLING.............. SeeBrewing Vibrating................. ... 2,00 o3pfeorratthinegSienrtveircmeiFttaecnttolyruopftthoe3sahmouersapppelricdaatiyo,nreofepretroatTinagbl3e2toor DCaRbElDeGReEeSls,Conveyors 1,25 1,50 SSThiuzipecekPrernCeesasrle&.n.dW.e.ars.sh.(cid:2)e.r.................. ...... 11,,2255 10hoursperday.Next,inthefirstcolumnofTable1,findthis CutterHead,JigDrives&Pumps 2,00 2,00 ACMotor................ ... 1,50 ManeuveringWinches 1,75 2,00 DCMotor................ ... 1,25 sameServiceFactorinboldfacetype.Then,totheright,under ScreenDrives............. 1,75 2,00 VacuumPumps............ ... 1,50 thedesiredhoursserviceandprimemover,locatetheconverted FStOacOkeDrsI,NUDtilUitySWTRinYches 1,25 1,50 WWiinndde&rsU(SnuwrifnadceSTtaynpde)............. ...... 11,,2255 ServiceFactor. BeetSlicers............... 1,25 1,50 (cid:3)YankeeDryers ............ ... 1,25 Bottling,CanFillingMachine.. 1,00 1,25 PLASTICINDUSTRY Forexample,fromTable3,theServiceFactoris1,25fora CDoeruegahlCMoixoekres,rsM..ea.t.G..ri.n.de.r.s... 11,,0205 11,,2550 BCaatlcehndDerrosp..M.i.ll,.2..s.m.o.o.th..ro.l.ls. 11,,5205 11,,5205 uniformlyloadedbeltconveyor.FromTable1,forthesame LUMBERINDUSTRY CompoundingMills......... 1,25 1,25 Barkers—SpindleFeed 1,25 1,50 ContinuousFeed,Holding& applicationthefollowingaretheServiceFactorsforvarious Barkers—MainDrive 1,75 1,75 BlendMill.............. 1,25 1,25 conditions. CarriageDrive............RefertoFactory Extruders ................ 1,50 1,50 Conveyors VariableSpeedDrive........ 1,50 1,50 Burner.................. 1,25 1,50 FixedSpeedDrive.......... 1,75 1,75 1.Enginedriven3to10hoursperday;use1,50ServiceFactor. MainorHeavyDuty......... 1,50 1,50 IntensiveInternalMixers MainLog................ 1,75 2,00 BatchMixers.............. 1,75 1,75 2.Enginedrivenupto3hoursintermittently;use1,25Service Re-SawMerry-Go-Round..... 1,25 1,50 ContinuousMixers.......... 1,50 1,50 Slab.................... 1,75 2,00 RUBBERINDUSTRY Factor. TCrhaanisnfes—r.F.lo.o.r......................... 11,,2550 11,,5500 BatchDropMill,2smoothrolls 1,50 1,50 Chains—Green............ 1,50 1,75 Calenders................ 1,50 1,50 3.Motordrivenupto3hoursintermittently;use1,00Service Cut-OffSaws—Chain&Drag . 1,50 1,75 Cracker,2corrugatedrolls ... 2,00 2,00 Factor. DFeeebdasr—kinEgdgDerru.m.s..................... 11,,7255 21,,0500 Cr1acckoerrruWgaartmederr—oll2.r.o.ll.,..... 1,75 1,75 Feeds—Gang............. 1,75 1,75 Extruders Feeds—Trimmer........... 1,25 1,50 ContinuousScrewOperation. 1,75 1,75 LogDeck................ 1,75 1,75 IntermittentScrewOperation.. 1,75 1,75 LogHauls—Incline,WellType. 1,75 1,75 Holding,Feed&BlendMill— LogTurningDevices 1,75 1,75 2Roll................. 1,25 1,25 PlanerFeed .............. 1,25 1,50 IntensiveInternalMixers PlanerTiltingHoists 1,50 1,50 BatchMixers.............. 1,75 1,75 Rolls—Live—OffBearing— ContinuousMixers.......... 1,50 1,50 RollCases.............. 1,75 1,75 MixingMill—2smoothrolls =OILDIPSTICK SortingTable,TippleHoist.... 1,25 1,50 (ifcorrugatedrollsareused,use Transfers—Chain&Craneway. 1,50 1,75 CrackerWarmer =BREATHER TVreanyeDerriLvaesth.e.D.r.iv.e.s..............R1e,f2er5toF1a,c5t0ory Resfienrevri—ce2farcotlolrs.)...................... 11,,5500 11,,5500 OILINDUSTRY SEWAGEDISPOSAL =OILFILL Chillers.................. 1,25 1,50 BarScreens............... 1,25 1,25 OilWellPumping..........RefertoFactory ChemicalFeeders.......... 1,25 1,25 =OILDRAIN ParaffinFilterPress......... 1,25 1,50 Collectors................ 1,25 1,25 RotaryKilns............... 1,25 1,50 DewateringScreens......... 1,50 1,50 PAPERMILLS(cid:2) ScumBreakers............ 1,50 150 Agitator(Mixer)............ ... 1,50 SloworRapidMixers........ 1,50 1,50 AgitatorforPureLiquids...... ... 1,25 Thickeners ............... 1,50 1,50 BarkingDrums,Barkers—Mech. ... 2,00 VacuumFilters ............ 1,50 1,50 Beater .................. ... 1,50 SUGARINDUSTRY BreakerStack............. ... 1,25 CaneKnives,Crushers....... ... 1,75 Calender................ ... 1,25 Mills(lowspeedend)........ ... 1,75 Chipper................. ... 2,00 ChipFeeder.............. ... 1,50 TEXTILEINDUSTRY CoatingRolls............. ... 1,25 Batchers,Calenders......... 1,25 1,50 Conveyors— CardMachines............ 1,25 1,50 Chip,Bark,Chemical....... ... 1,25 DryCans,Dryers........... 1,25 1,50 Log(incl.Slab)............ ... 2,00 DyeingMachinery.......... 1,25 1,50 CouchRolls.............. ... 1,25 KnittingMachinery.......... RefertoFactory Cutter................... ... 2,00 Looms,Mangles, Cylindermolds............ ... 1,25 Nappers,Pads........... 1,25 1,50 (cid:3)Dryers— RangeDrives ............. RefertoFactory PaperMach.&ConveyorType. ... 1,25 Slashers,Soapers,Spinners, Embosser................ ... 1,25 TenterFrames,Washers, Extruder................. ... 1,50 Winders............... 1,25 1,50 WINDLASS.............. RefertoFactory (cid:2)ServiceFactorsforpapermillapplicationsareappliedtothenameplateratingof theelectricdrivemotoratthemotorratedbasespeedandareconsistentwith thoseshowninTAPPIstandards. (cid:3)Anti-frictionbearingsonly. (cid:2) Aservicefactorof1,00maybeappliedatbasespeedofasupercalender operatingoveraspeedrangeofpartconstantpowerandpartconstanttorque wheretheconstantpowerspeedrangeisgreaterthan1,5to1.Aservicefactorof 1,25isapplicabletosupercalendersoperatingatconstanttorqueovertheentire speedrangeorwheretheconstantpowerspeedrangeislessthan1,5to1. ©RexnordIndustries,LLC,1997,2007. (M131-110)7 Mechanical Service Factors forelectricmotor,steamturbineorhydraulicmotordrives... 3 Table listed by application recommendationsareMINIMUMandnormalconditionsareassumed Service Service Service Service Application 3to Over Application 3to Over Application 3to Over Application 3to Over 10 10 10 10 10 10 10 10 Hour Hour Hour Hour Hour Hour Hour Hour AGITATORS (cid:3)CONVEYORS—Uniformly INDUCEDDRAFTFANS ... 1,50 1,50 PUMPS PureLiquids.............. 1,00 1,25 loadedorFed: KILNS............... SeeMills,Rotary Centrifugal............... 1,25 1,25 Liquids&Solids............ 1,25 1,50 ApronorBucket ........... 1,25 1,50 Proportioning............. 1,25 1,50 Liquids-VariableDensity 1,25 1,50 Assembly,Belt,Chain,Flight, LAUNDRYWASHERS...... 1,50 2,00 Reciprocating APRONCONVEYORS Oven,Screw ............. 1,25 1,25 LAUNDRYTUMBLERS..... 1,25 1,50 SingleAct.,3ormoreCyl..... 1,75 1,50 UHneaifovyrmDluytLyo.a.d.e.d.o.r.F.e.d...... 11,,2255 11,,5500 (cid:3)CNOotNUVnEiYfoOrRmSl—yFHeedavyDuty, LDIrNiviEngSHPrAocFeTsSsingEquipment.. 1,25 1,50 DoDSuionbuglebleAleActAc.,tc.2t,in1ogro,mr12oCrCeylyC.l..yl............ RR1ee,ff2ee5rrttooFF1aa,cc5tt0oorryy APRONFEEDERS......... 1,25 1,50 Apron,Assembly,Belt,Bucket, OtherLineShafts,Light...... 1,00 1,25 Rotary:Gear,Lobe,Vane..... 1,00 1,25 ASSEMBLYCONVEYORS Chain,Flight,Oven,Screw.... 1,25 1,50 LIVEROLLCONVEYORS RefertoFactory PUNCHPRESSES(Gear UHneaifovyrmDluytLyo.a.d.e.d.o.r.F.e.d...... 11,,2255 11,,5205 CLivOeNRVolEl.Y.O.R.S.—..S.e.v.e.r.e.D.uty RefertoFactory LOBEBLOWERSOR Driven)................. 1,75 2,00 BALLMILLS.......... SeeMills,Rotary ReciprocatingShaker........ 1,5 2,00 COMPRESSORS.......... 1,25 1,50 RECIPROCATING COOKERS(Brewing& LOGHAULS(Lumber) Conveyors&Feeders ....... 1,75 2,00 BARGEHAULPULLERS.... 1,75 2,00 Distilling),(food)......... 1,25 1,25 Incline-wellType........... 1,75 1,75 RECIPROCATING BARKING COOLINGTOWERFANS RefertoFactory LOOMS(Textile) ......... 1,25 1,50 COMPRESSORS MDreucmhsa(nCiocuapl.lin.g.C.o.n.n.e.ct.ed.)..... ...... 22,,0000 (cid:3)CRANES LUMBERINDUSTRY....... SeeTable2 SMinugltlIe-CCyylilninddeerr......................... 11,,5705 12,,7050 BARSCREENS(Sewage)... 1,25 1,25 DryDockCranes,MainHoist, MACHINETOOLS RODMILLS.......... SeeMills,Rotary BATCHERS(Textile) 1,25 1,50 BridgeandTrolleyTravel. RefertoFactory AuxiliaryDrives............ 1,00 1,25 BBUHEEneaLLifToTvyrmFCDEOluyEtNLDyo.VEa.REd.SYe.dO..o.R.r.S.F..e..d............ 111,,,222555 111,,,552005 D(COSSuREregeWUwaorSaAr.HgTS.EetE.oR)R.nSI.e.N....G....S...C......R...E...E...N...S............ 11.,,.57.50 211,,,507005 BMNPPTalueaoanpnttieccdpnhhiiPnnDinlPggargrinevRmeePsoassrrlselc(ssG..hsi...ne(...Bea...sere....ltde....)d....)......................................... R11111e,,,,,f22777e55555rtoF11222a,,,,,c55000t00000ory RIRPSNcuUOrmDeBTepUBAnsESRs.RTY(S.R&a.InE.PdS.L.o.A.r.S.G.T..rI.a.C.v.Se..l.)................ S11e,,02e05Tab11le,,25250 BBCLoELebONnetrWDif.uIEN.gR.aGS.l..R..O....LL..S....(M....a..c..h..i..n..e..) 111,,,222555 111,,,255500 DDDIOISSUTCIBLFLLEEIENDAGCE.RT.SI.N..G....P..U..M....P..S...... 1Se,0e0Tab1le,225 MMDiAAstNSilHlGinLTgEU)B(.TS.e(.xBt.ir.lee.w).i..n..g....&........ 11,,2255 11,,5205 SSARoACirtNRaWrEDyaE—sNMhSiSnaUgnLdL.Eo.Rr.GS...ra..v..e..l.................. 111,,,022055 111,,,255500 Vane................... 1,25 1,50 2ormoreCylinders......... 1,25 1,50 MEATGRINDERS(Food)... 1,25 1,50 TravelingWaterIntake....... 1,00 1,25 BOTTLINGMACHINERY... 1,00 1,25 SingleCylinder............ RefertoFactory METALMILLS SCREWCONVEYORS BREWING............... SeeTable2 DOUGHMIXER(Food) .... 1,25 1,50 DrawBenchCarriages& Uniform................. 1,25 1,25 BRICKPRESS(Clay DRAWBENCH(MetalMills) MainDrives............. 1,25 1,50 HeavyDutyorFeeder....... 1,25 1,50 Working)............... 1,75 2,00 Carriage&MainDrive..... 1,25 1,50 Pinch,Dryer&Scrubber SCUMBREAKERS(Sewage) 1,50 1,50 B(CRlIaQyUWEToTrkEinMgA)C.H.I.N.E.S..... 1,75 2,00 DDRREYDDGOECSK..C.R.A.N..E.S..........RSeefeerTtoabFlaec2tory STalitRbteolerlslsC,.oR.ne.vve.eyr.os.irns.g,.N..o..n..-..R..e..ve..r..si..n..gR1e,f2e5rtoF1a,c5t0ory SSEHWAKAEGRECDOISNPVOESYAOLR.S........... S1e,7e5Tab2le,020 BUCKET DRYERS&COOLERS(Mills, GroupDrives............ 1,50 1,50 SHEETERS(Rubber)....... ... 1,50 CCEEllooeevvnnaavvtteeooyyrroossrrssCUUHnoinnefotaiifrnovmuyrmoD.uu..st..y.............. 1111,,,,22225555 1111,,,,55550000 RD(ToYetExaItrNiyle)G)..M....A..C..H....IN....E..R..Y............ .1.,2.5 11,,5500 NRWeoiMvrnee-arRDsciehnrvaignewer.issni.ng..g&..I..nFd..lai..vt..itde..un..ain..lg..D..ri..v..es.. R12e,,f20e50rtoF12a,,c50t00ory SI3oIoNrrG2mLCoEryelAinCCdyeTlirInsNd.eGr.s.P..U...M...P...... R1e,f2e5rtoF1a,c5t0ory ElevatorsHeavyDuty 1,25 1,50 ELEVATORS WireWindingMachines...... 1,50 1,50 (cid:3)SKITOWS&LIFTS.... NotApproved CRTeuAxbtLbilEeeNr.aD.nEd.R.PS.la.s.ti.c.................... S1e,2e5Tab1le,520 BBBuuuccckkkeeettt---UHCneoainfovtiyrnmuDouLuotysod.......................... 111,,,222555 111,,,555000 MBaIwlLliLathSn,dSpRRuOordTRAiMnRgilYlsGear....... ... 2,00 (cid:3)SSLKAIPBHPOUSISHTER.S................... 11,,2550 11,,5500 CCCAAANRNDEFMIKLNLAIICNVHGEISNM.EA.S.C(.HT.eI.Nx.tEi.lSe.)..... 1.1,.,20.50 111,,,572550 (cid:3)(cid:3)(cid:3)CGEFMrsereacanianvtgrilihtaLfyuittfoDgtsra.i,ssl.cPD..haa..isssr..cgeh..ena..gr...ge...er...................................... 1NN1Nooo,,20ttt50AAApppppprrr1ooo1vvv,,eee22ddd55 wDCPTueiietrbmhmebcbHeltelnieC,ntlgiPoKclnaaiBlnlnianeRsr,cri&netDeglsWdry.Gee..rdes..ag..&re...BC...ao...ro...Ml...e...irlsl...s ..1....,..7....5 12211,,,,,5005500000 SS(SSLLOeIUTAwDTPaEGEgRREeSS)C((M.OT.eeL.xtL.atEi.llC)e.T)..O......R...S............... 111,,,222555 111,,,525050 CCCAEAMRREPDNUUTLMLKEPIRELSRNS.S.............................S11e,,e72M55ills,21R,,05ot00ary FE(PAXlTaNRsStUicD&ERRSubber)........ SeeTable2 MCCooIXnncsEtraRente(tA,DClesononsistt.ye&.e.lAn.tg....it..a..to..r..s..).. 11,,2255 11,,5500 SSPTEINERNIENRGSG(TEeAxtRilSe.)...........R1e,f2e5rtoF1a,c5t0ory Centrifugal............... 1,25 1,25 VariableDensity........... 1,25 1,50 STOKERS................ 1,00 1,25 CBlEoDNwiseTcrRhs,aIFCrgUoeGmEpAlerLevasstoorrss,, CIFnoodroucecliedndgDDTraorafwtft.er..s................................ R1.e,.f5e.0rtoF11a,,c52t05ory NOAILPIPNEDRSUS(TTeRxYti.le.)................. S1e,2e5Tab1le,520 SSTUOGNAERCINRDUUSHSTERRYS................ S1e,7e5Tab2le,020 FansorPumps........... 1,25 1,25 Large(Mine,etc.).......... 1,50 1,50 ORECRUSHERS.......... 1,75 2,00 TABLECONVEYORS CHAINCONVEYORS LLaigrhgte(SlnmdaulsltrDiaialm..e.te.r)............... 11,,5000 11,,5205 OVENCONVEYORS (Non-Reversing) UniformlyLoadedorFed 1,25 1,25 Uniform................. 1,25 1,25 GroupDrives............. 1,50 1,50 HeavyDuty............... 1,25 1,50 FEEDERS HeavyDuty............... 1,25 1,50 IndividualDrives........... 2,00 2,00 CHEMICALFEEDERS ADpisrco.n,.B.e.l.t.............................. 11,,2050 11,,5205 PAPERMILLS ............ SeeTable2 Reversing............. RefertoFactory (Sewage) ............... 1,25 1,25 Reciprocating............. 1,75 2,00 (cid:3)PASSENGERELEVATORS TENTERFRAMES(Textile).. 1,25 1,50 CLARIFIERS.............. 1,00 1,25 Screw................... 1,25 1,50 PEBBLEMILLS............ ... 1,50 TEXTILEINDUSTRY....... SeeTable2 CLASSIFIERS............. 1,25 1,50 FLIGHTCONVEYORS PLATEPLANERS.......... 1,75 2,00 THICKENERS(Sewage).... 1,50 1,50 Uniform................. 1,25 1,25 CLAYWORKING......... SeeTable2 Heavy................... 1,25 1,50 PRINTINGPRESSES.... TUMBLINGBARRELS...... 1,75 2,00 COLLECTORS(Sewage) ... 1,25 1,25 FOODINDUSTRY ........ SeeTable2 PROPORTIONINGPUMPS.. 1,25 1,50 VACUUMFILTERS(Sewage)1,50 1,50 COMPRESSORS GENERATORS(Not PUGMILLS(Clay) ........ 1,25 1,50 VANEBLOWERS ......... 1,25 1,50 Centrifugal............... 1,25 1,25 Welding) ............... 1,00 1,25 PULLERS(BargeHaul)..... 1,75 2,00 WINCHES(Dredges)...... 1,25 1,50 Lobe ................... 1,25 1,50 GRAVITYDISCHARGE WINDERS(Textile)........ 1,25 1,50 Reciprocating............. ELEVATORS............. 1,00 1,25 WINDLASS..............RefertoFactory MSinugltlie-C-Cylyilninddeerr......................... 11,,5705 12,,7050 HAMMERMILLS.......... 1,75 2,00 WIRE (cid:3)HOISTS DrawingMachines ......... 1,25 1,50 CONCRETEMIXERS HeavyDuty............... 1,75 2,00 WindingMachines.......... 1,50 1,50 Continuous............... 1,25 1,50 MediumDuty............. 1,25 1,50 Intermittent............... 1,25 1,50 SkipHoist................ 1,25 1,50 (cid:3)SelectionofFalk™productsforapplicationswhoseprimarypurposeisthe ContactRexnordforproperselectionofaFalk™RAM®mixerdrive. transportationofpeopleisnotapproved.Thisincludessuchapplicationsasfreight orpassengerelevators,escalators,manlifts,workliftplatformsandskitowsand skilifts. Iftheprimarypurposeoftheapplicationismaterialconveyanceand occasionallypeoplearetransported,theRexnordwarrantymayremainineffect providedthedesignloadconditionsarenotexceededandcertificationtothe appropriatesafetycodesandloadconditionshasbeenobtainedbythesystem designerorenduserfromtheappropriateenforcementauthorities. 8(M131-110) ©RexnordIndustries,LLC,1997,2007. How to Select an A-Plus Gear Drive Beforemakingaselection,refertoBasicInformationandConditionsAffectingSelectiononPages5and6. Locatetheproperpagewithinthepowerratingstablesbased Information Required onnominalratioandhighspeedshaftrpm.Onceonthe properpage,gototheportionofthetableassociatedwith ThefollowingbasicinformationisrequiredtoselectanA-Plus yourhighspeedshaftrpm,andusingtheappropriatenominal geardriveforyourapplication. ratio,tracetotherightthroughthecolumns.Determinethe columnofthefirstpowerratingthatequalsorexceedsthe PrimeMoverData equivalentpowerdeterminedinStep2.Thesizeofthegear (cid:2) Type–electricorhydraulicmotororengine driveselectedisatthetopofthecolumn.Onceageardrive (cid:2) PowerratinginkWorhp sizehasbeenselected,anexactratiocanbedeterminedfrom (cid:2) Speed–constantorvariable theexactratiotables. (cid:2) Dimensions–ifRexnordwillfurnishmotormountingaccessory 5. CheckthermalratingusingproceduresoutlinedonPage10. orcoupling Theapplicationadjustedthermalratingofthecoolingmethod selectedmustequalorexceedtheactualpowertransmitted. DrivenMachineData (cid:2) Type–conveyor,kiln,etc. 6. Whenoverhungloadsorthrustloadsarepresent,checkto assuretheyarewithinthepublishedcapacityofthegeardrive (cid:2) PowerdemandinkW,orhp,orequivalenttorque. selected. (cid:2) Speed Overhungload(radialload)isimposedbysheaves,sprockets, (cid:2) Service–Hoursperday;reversalsperminuteifreversing; andopenpinionsthataremounteddirectlyontheshaft minutesperhour(dutycycle)ifnotcontinuous extensionsofthegeardrive.Geardriveshaftextensionsthat areflexiblecouplingconnectedneednotbecheckedfor GearDriveData overhungload,flexiblecouplingsdonotimposesignificant (cid:2) Type–parallelshaftorrightangle overhungload. (cid:2) Horizontalorverticaloutputshaft Overhungloadformula,procedures,andgeardriveoverhung (cid:2) Ambienttemperatureatdrivelocation loadcapacities: (cid:2) Altitudeabovesealevel Parallelshaftgeardrives,seePages38thru44. (cid:2) Ambientairvelocityatdrivelocation Rightangleshaftgeardrives,seePages79thru82. (cid:2) Mountingposition–ifinclinedornon-standardorientation Thrustload(axialload)appliedtothegeardriveisunusual.In theseapplications,themagnitudeofthethrustload,andthe ShaftConnections directionofthrustload,issuppliedbythesystemdesigner. (cid:2) Shaftdiametersandkeysizes Thrustloadsmustbewithinthepublishedcapacityofthegear (cid:2) Overhungloads–providefulldescriptionofsheave,sprocket, drive. orpinion Thrustloadcapacity: (cid:2) Thrustloadanddirection Parallelshaftgeardrives(verticalLSS),seePage45. Rightangleshaftdrives(verticalLSS),seePage82. Power Selection Method Complexshaftloadingsinvolvingsimultaneousapplicationof Thepowerselectionmethodisbasedonthepowerratingofthe overhungload,thrustload,orbendingmoment(asinmixers primemover. andagitators)shouldbereferreddirectlytoFactory. 1. Determinethemechanicalservicefactor. Torque Selection Method Electricmotordrivenapplications,seeTables2&3,Pages7 &8. Forconvenience,lowspeedshafttorqueratingsofgeardrives areprovided,andapurelymechanicalselectionofageardrive Enginedrivenorintermittentapplications,seeTable1,Page7. canbemadeusingtorquevalues.Simplyfollowthesteps 2. Calculateequivalentpowerbymultiplyingtheratedpowerof outlinedinthepowerselectionmethod,substitutingtorquevalues theprimemoverbythemechanicalservicefactordetermined forpowervalues.Inordertocheckthermaladequacy,andcheck inStep1. shaftratings,itwillbenecessarytoconvertthetorque(Nm)to power(kW),usingtheformulabelow: 3. Determinegeardrivenominalratio. Torque(Nm)xOutputSpeed(rpm) Dividethehighspeedshaftrpmbythelowspeedshaftrpmto InputPower(kW)= 9550 determineyouridealratio.Chooseanominalratiothatmost closelyapproximatesyouridealratio.Nominalratiosare foundinthepowerratingstables,seeStep4. Example Selections 4. UsingtheequivalentpowerdeterminedinStep2,andthe AnexampleusingthePowerSelectionMethodandanexample geardrivenominalratiothatmostcloselyapproximatesthe usingtheTorqueSelectionMethodarefoundonPage11. idealratiodeterminedinStep3,selectthegeardrivesize usingthePowerRatingsTables. PowerRatingsTables: Parallelshaftgeardrives,seePages18thru33. Rightangleshaftdrives,seePages66thru75. ©RexnordIndustries,LLC,1997,2007. (M131-110)9 Thermal Factors & Procedures Checking Thermal Rating Thermal Checkingthethermalratingisextremelyimportant.Ifthegear Table 1 — Ambient Temperature Factor – B1 drive’scapacitytodissipatethermalenergyisinsufficient,itwill (Forallcoolingmethods) overheat,andseveredamagemayoccur. FactorwithnoAuxiliary Ambient Factorwith GeardrivebasicthermalratingsaredefinedonPage5.A Temperature(cid:2) CoolingorwithShaft CoolingTubes discussionofapplicationadjustedthermalrating,andwhenitis FanorwithElectricFan applicable,isfoundonPage6. 10°C 1,17 1,05 15°C 1,12 1,03 20°C 1,06 1,01 25°C 1,00 1,00 Application Adjusted Thermal Rating 30°C 0,94 0,98 Onceamechanicallyadequategeardriveselectionhasbeenmade 35°C 0,88 0,96 40°C 0,81 0,94 perSteps1-4onPage9,determinetheapplicationadjustedthermal 45°C 0,74 0,92 ratingofthegeardrive.Theapplicationadjustedthermalratingof 50°C 0,66 0,90 thegeardriveselectedmustequalorexceedtheactualpower (cid:2)Factorsforotherambienttemperaturescanbeinterpolated. transmitted. Thermal Inmostcases,thenameplatepowerratingofthemotoris Table 2 — Altitude Factor – B2 assumedtoequaltheactualpowertransmitted.Itisnot (Foraircooledmethods,nocoolingtubes) necessarytoapplythemechanicalservicefactorwhen determiningthermaladequacyofageardrive. FactorwithnoAuxiliary Coolingorwith AltitudeAboveSeaLevel-Meters ShaftDrivenFanorwithElectricFan Usethefollowingformulatodetermineapplicationadjusted 0to750 1,00 thermalrating: 750 0,95 PTA=PTxB1xB2xB3xB4xB5where: 1500 0,90 PTA=ApplicationAdjustedThermalRating 2250 0,85 3000 0,81 PT=BasicThermalRating 3750 0,76 B1=AmbientTemperatureFactor(ThermalTable1) 4500 0,72 B2=AltitudeFactor(ThermalTable2) 5250 0,68 B3=AmbientAirVelocityFactor(ThermalTable3) Thermal B4=InletWaterTemperatureFactor(ThermalTable4) B5=DutyCycleFactor(ThermalTable5) Table 3 — Ambient Air Velocity Factor † – B3 BasicThermalRatingsforparallelshaftgeardrivesarefoundon (Fornoauxiliarycooling) Pages34-37. FactorfornoAuxiliary SustainedAmbient Installed Cooling(ShaftFan, BasicThermalRatingsforrightangleshaftgeardrivesarefound AirVelocity–m/s† Environment ElectricFan,Cooling onPages76-78. TubesarenotPresent) Forthegeardriveyouhaveselectedmechanically,choosean Lessthan0,5m/s SmallConfinedSpace 0,75 auxiliarycoolingmethodwhoseapplicationadjustedthermal Between0,5and1,4m/s LargeIndoorRoom 1,00 ratingequalsorexceedstheactualpowertransmitted.Ifnolisted Between1,4and3,7m/s LargeIndoorRoom 1,40 coolingmethodisadequate,contacttheFactoryforselectionof Greaterthan3,7m/s Outdoors 1,90 anoptionalheatexchanger,orconsideralargergeardrivewith greaterthermalcapacity. † Thesustainedambientairvelocitymustbeacontinuousflowofairdirectlyonto thegeardrive.Iftheairflowcannotbereliedupontobecontinuous,an ambientairvelocityfactorof1,00mustbeused. Thermal Table 4 — Inlet Water Temperature Factor – B4 (Forcoolingtubes) InletWaterTemperature FactorwithCoolingTubes 10°C 1,10 20°C 1,00 30°C 0,90 40°C 0,80 Thermal Table 5 — Duty Cycle Factor ‡ – B5 (Forallcoolingmethods) %OperatingTimePerHour FactorWithorWithoutAuxiliaryCooling 100% 1,00 80% 1,05 60% 1,15 40% 1,35 20% 1,80 ‡ Thedutycyclefactorpermitsanupwardadjustmentofthebasicthermalrating associatedwithintermittentdutyapplications,andtakesintoaccountsimplythe %operatingtimeperhourofthegeardrive,regardlessofdurationrelationship betweenruntimeintervalsanddowntimeintervals,andprovidednospecificrun timeintervalexceedsonehourinduration.Ifthedurationofanysingleruntime intervalisonehourorgreater,thedutycyclefactormustberegardedas1,00. Wherethe%OperatingTimePerHourfallsbetweenvaluestabulatedabove,use thenexthigher%OperatingTime. 10(M131-110) ©RexnordIndustries,LLC,1997,2007.