Falk A-Plus Parallel and Right Angle Shaft Drives

116 Pages·2011·1.85 MB·English

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.