EXPLANATORY NOTES

A8 www.nord.com

AGMA GEARMOTOR LOAD CLASSIFICATIONS

The AGMA rated parallel (helical) gearmotors in the catalog are grouped by Service Classes I, II or III.

Class I : (Minimum 0.8 Service Factor)A gearmotor can operate with steady loads not exceeding the normal rating and 8 - 10 hoursof running time per day.

Class II : (Minimum 1.4 Service Factor)

a) A gearmotor can operate with steady loads not exceeding the normal rating and 24 hoursof running time per day.

or

b) A gearmotor can operate with moderate shock loads not exceeding 1.25 x rated load torqueand 8 - 10 hours of running time per day.

Class III : (Minimum 2.0 Service Factor)

a) A gearmotor can operate with moderate shock loads which are a maximum 1.25 x rated load torqueand 24 hours of running time per day.

b) A gearmotor can operate with heavy shock loads in excess 1.25 x rated load torqueand 8 - 10 hours of running time per day.

The Nord Gear units in the catalog grouped by AGMA service classes are applied per AGMA service factorlistings as shown by 6010 - E88 and 6034 - A87.

The high-speed gearing is finish ground to reduce noise levels to a minimum. The low-speed gears are skived perthe latest finishing technology. In many cases the quality levels of the gearing exceeds AGMA quality levels 11-13.

AGMA GEAR REDUCER LOAD CLASSIFICATIONS

This chart is a guideline for the types of loads applied to the following:

Parallel (helical) reducersHelical-Worm gearmotors and reducersHelical-Bevel gearmotors and reducers

SERVICE IN HOURS/ DAY

LOAD CLASSIFICATION OF THE MACHINERY DESIGN WHEN FREQUENT STOPS / STARTS ARE APPLIEDIN EXCESS OF 10 / HOUR

UNIFORM MODERATE SHOCK HEAVY SHOCK UNIFORM MODERATE SHOCK HEAVY SHOCK

1/2 hours or less 0.8 0.8 1.0 0.8 1.0 1.25

2 hours intermittently 1.0 1.0 1.25 1.0 1.25 1.5

10 hours 1.0 1.25 1.5 1.25 1.5 1.7524 hours 1.25 1.5 1.75 1.5 1.75 2.0

AGMA GEAR MOTOR LOAD CLASSIFICATION

www.nord.com A9

APPLICATIONCLASS OF SERVICE

APPLICATIONCLASS OF SERVICE

APPLICATIONCLASS OF SERVICE

3-10HRS/DAY

10-24HRS/DAY

3-10HRS/DAY

10-24HRS/DAY

3-10HRS/DAY

10-24HRS/DAY

AGITATORSPure LiquidsLiquids & SolidsLiquids —

Variable DensitySemi-Liquids —

Variable DensityBLOWERS

CentrifugalLobeVane

BREWING & DISTILLINGBottling MachineryBrew Kettles —

Continuous DutyCookers —

Continuous DutyMash Tubs

Continuous DutyScale Hopper

Frequent startsCAN FILLING MACHINESCANE KNIVESCAR DUMPERSCAR PULLERS —

Intermittent dutyCLARIFIERSCLASSIFIERSCLAY WORKINGMACHINERY

Brick PressBriquette MachineClay working

machineryPug Mill

COMPRESSORSCentrifugalLobeReciprocating

Multi-cylinderSingle Cylinder

CONVEYORS—UNIFORMLY LOADEDOR FED

ApronAssemblyBeltBucketChainFlightOvenScrew

CONVEYORS—HEAVY DUTY NOTUNIFORMLY FEDApronAssemblyBelt

III

II

II

IIII

I

—

—

—

IIIIIIII

IIII

IIIIIIIIII

III

IIIII

IIIIIIII

IIIIII

IIII

II

II*

IIIIII

II

II

II

II

IIIIII

—

—IIII

III*III*IIII

IIII

II*III*

IIIIIIIIIIIIIIII

IIIIII

BucketChainFlightLive Roll (package)OvenReciprocatingScrewShaker

CRANES & HOISTSMain Hoists

Heavy DutyMedium Duty

ReversingSkip HoistsTrolley DriveBridge Drive

CRUSHERSOreStone

DREDGESCable ReelsConveyorsCutter Head DrivesJig DrivesManeuvering WinchesPumpsScreen DriveStackersUtility Winches

ELEVATORSBucket-Uniform LoadBucket-Heavy LoadBucket-ContinuousCentrifugal DischargeEscalatorsFreightGravity DischargeMan LiftsPassengersService-Hand Lift

FANSCentrifugalCooling Towers

Induced DraftForced DraftInduced DraftLarge (Mine, etc.)Large IndustrialLight (Small Diameter)

FEEDERSApronBeltDiscReciprocatingScrew

FOOD INDUSTRYBeet Slicer

IIIIIIIIIIIIIIIII

IIIIIIIIIIIII

IIIIII

IIIIIIIIIIIIIIIIIIIII

IIIIIIIII**

III

II

II*IIIIIII

IIIII

IIIII

II

IIIIIIIIII

III*II

III*

III*IIIIII

II*II*

III*III*

—II

III*III*—II

III*II

—

IIIIIIIIIIIIII**

—

II

II*II

II*II*II

IIIIII

III*II

II

Cereal CookerDough MixerMeat Grinders

GENERATORS —(Not Welding)

HAMMER MILLSLAUNDRY WASHERS

ReversingLAUNDRY TUMBLERSLINE SHAFTS

Heavy Shock LoadModerate Shock LoadUniform Load

LUMBER INDUSTRYBarkers —

Spindle FeedBarkers-Main DriveCarriage DriveConveyors-BurnerConveyors-Main orHeavy DutyConveyors-Main LogConveyors —

Merry-go-RoundConveyors-SlabConveyors-TransferConveyors-WasteChains-FloorChains-GreenCut-Off Saws-ChainCut-Off Saws-DragDebarking DrumsFeeds-EdgerFeeds-GangFeed-TrimmerLog DeckLog Hauls-Well TypeLog Turning DevicesPlaner FeedPlaner Tilting HoistRolls-Live-Off

Brg.-Roll CasesSorting TableTipple HoistTransfers-ChainTransfers-CranewayTray DrivesVeneer Lathe Drives

MACHINE TOOLSBending RollNotching Press —

Belt DrivenPlate PlanerPunch Press —

Gear DrivenTapping Machines

IIIII

IIII

IIII

IIIIII

IIIII*II

IIIII

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

IIIIIIIIIIIII*

II

*III

IIIIII

IIIIII

IIIII*

IIII

III*IIII

IIIIII**

III

IIIIII*IIIIII*III*IIIIIIIIIIIIIIIIIIII*IIIIII*IIIIII*III*III*IIIIII

III*IIIIIIIIIIIIIII*

II

*III*

IIIIII*

* Refer to factoryApplications requiring frequent stops and starts, high inertia loads or oversized brakes or clutches (exceeding motor full load torque) should be referred toNORD GEAR for rewiew.

AGMA GEAR MOTOR LOAD CLASSIFICATION

A10 www.nord.com

APPLICATIONCLASS OF SERVICE

APPLICATIONCLASS OF SERVICE

APPLICATIONCLASS OF SERVICE

3-10HRS/DAY

10-24HRS/DAY

3-10HRS/DAY

10-24HRS/DAY

3-10HRS/DAY

10-24HRS/DAY

Other Machine ToolsMain DrivesAuxillary Drives

METAL MILLSBridle Roll DrivesDraw Bench-CarriageDraw Bench —

Main DriveForming MachinesPinch Dryer &

Scrubber Rolls,ReversingSlittersTable Conveyors

Non-ReversingReversing

Winding Reels-StripWire Drawing &

Flattening MachineWire Winding

MachineMILLS, ROTARY TYPE

BallCement KilnsDryers & CoolersKilnsPebbleRodTumbling Barrels

MIXERConcrete Mixers,

ContinousConcrete Mixers,

IntermittentConstant DensityVariable Density

OIL INDUSTRYChillersOil Well PumpingParafin Filter Press

Rotary KilnsPAPER MILLS

AeratorsAgitators (Mixers)Barker Auxilliaries,HydraulicBarker, MechanicalBarking DrumBeater & PulperBleacherCalendersCalenders-SuperConverting Machines,

except Cutters,Platters

III

IIIIII

IIIIII

*II

II——

II

II

III*IIIIIIIIIIIII

II

IIII

II*IIII

*II

———————

—

IIII

III*III*

III*III*

*II

IIIIIIIII

III

II

III**IIII

III*III*III*

II

—IIII

II*IIII

*II

IIIIII

III*II*II

II*II

II

ConveyorsConveyors, LogCouchCutters, PlatersCylindersDryersFelt StretcherFelt WhipperJordansPressesPulp Machines, ReelStock ChestsSuction Roll

Washer & ThickenersWinders

PRINTING PRESSESPULLERS

Barge HaulPUMPS

CentrifugalProportioningReciprocatingSingle Acting 3 or

More CylindersDouble Acting 2 or

More CylindersSingle Acting 1 or

2 CylindersDouble Acting

Single ActingRotary — Gear Type

— Lobe, VaneRUBBER INDUSTRY

MixerRubber CalenderRubber Mill(2 or more)SheeterTire Building MachinesTire & Tube

Press OpenersTubers & Strainers

SEWAGE DISPOSALEQUIPMENT

AeratorsBar ScreensChemical FeedersCollectors, Circuline

or StraightlineDewatering ScreensGrit CollectorsScum BreakersSlow or Rapid MixersSludge CollectorsThickeners

———————————————I

III

III

II

II

*

*II

IIIII

IIII*

*II

*II

IIIIIIIIIII

IIIII*II*III*II

II*II

III*II

II*IIII

II*II*IIII

III*

IIII*

II

II

*

*IIII

III*II*

II*II**

*II

**IIII

IIIIIIIIIIIIII

Vacuum FiltersSCREEN

Air WashingRotary —

Stone or GravelTraveling Water

IntakeSLAB PUSHERSSTEERING GEARSTOKERSTEXTILE INDUSTRY

BatchersCalendersCard MachinesCloth Finishing

Machines,(Washer, pads,tenters)

(Dryers, Calenders,etc.)

Dry CansDryersDyeing MachineryKnitting Machines

(looms, etc.)LoomsManglesNappersPadsRange DrivesSlashersSoapersSpinnersTenter FramesWasherWinders (other than

(Batchers)Yarn Preparatory

Machines (Cards,Spinners, Slashers,etc.)

WINDLASS

II

I

II

IIIIII

IIIIII

IIIIIIII

*IIIIIIII*IIIIIIIIIIII

IIII

II

II

II

IIIIIIII

IIIIII*

IIIIIIII

*IIIIIIII*IIIIIIIIIIII

IIII*

* Refer to factoryApplications requiring frequent stops and starts, high inertia loads or oversized brakes or clutches (exceeding motor full load torque) should be referred toNORD GEAR for review.

AGMA GEAR REDUCER LOAD CLASSIFICATION

www.nord.com A11

APPLICATIONSERVICEFACTOR APPLICATION

SERVICEFACTOR APPLICATION

SERVICEFACTOR

8 to 10hour

Service

24hours

Service

8 to 10hours

service

24hours

Service

8 to 10hours

Service

24hours

ServiceNORMAL INDUSTRIALUSAGESteady load not exceedingnormal rating of motor orintermittent shockModerate shockHeavy shock

AGITATORSPure LiquidVariable density

BLOWERSCentrifugalLobe

BREWING AND DISTILLINGBottling machineryBrew kettles, continous dutyCookers, continous dutyMash tubs, continous dutyScale hooper (frequentstarting)

CAR DUMPERS

CAR PULLERS

CLARIFIERS

CLASSIFIERS

CLAY WORKINGMACHINERYBrick pressBriquette machineClay working machineryPug mill

COMPRESSORSCentrifugalLobeReciprocating multi-cylinders(within 3% cyclic variation)Reciprocating, single cylinder

CONVEYORS(Uniformly loaded or fed)

Flight, Oven, Screw

CONVEYORS(Heavy duty or dual drive notuniformly fed)Apron, Assembly, BeltBucket, FlightOven, ScrewReciprocating, Shaker

CRANES & HOISTSMain hoists - medium duty

- heavy dutySkip hoistsTravel motionTrolley motion

1.001.251.75

1.001.25

1.001.25

1.001.001.001.001.25

1.75

1.25

1.00

1.25

1.751.751.251.25

1.001.25

1.25Refer to

1.00

1.251.251.251.75

1.251.75

Referto

factory

1.251.50

Refer tofactory

1.251.50

1.251.50

1.251.251.251.251.50

1.75

1.50

1.25

1.50

1.751.751.501.50

1.251.50

1.50factory

1.25

1.501.501.501.75

1.501.75Refer

tofactory

DREDGESCable reels, ConveyorsCutter head drivesJig drive, Screen driveStackersUtility winches

ELEVATORS(Conveyor type - same asconveyors)

FANSCentrifugalCooling towersLarge (mine, etc.)Light small diameter

FOOD INDUSTRYBeet slicerCereal cookersDough mixerMeat grinder

HOISTS - See Cranes

LAUNDRY WASHERS

LAUNDRY TUMBLERS

MACHINE TOOLSPunch press ( gearconnected to toad)Notching press (belt driven)Plate planersOther machine tools maindrivesAuxiliary drives (FeedTraverse, etc.)

METALL MILLSDraw bench carriage andmain drivesForming machinesPinch, dryer and scrubberrolls (reversing)SlittersSmall rolling mill, drivesTable conveyors (nonreverse)Table conveyors (reversing)Wire drawing and flatteningmachines

MILLS (ROTARY TYPE)Ball, dryer coolerCement kilns, pebble rodKilnsTumbling barrels

MIXERSConcrete mixers - continousConcrete mixers - intermittentConstant densityVariable density

1.251.751.751.251.25

Refer toFactory

1.00Ref.to1.251.00

1.251.001.251.25

1.25

1.25

1.75Refer to

1.751.25

1.00

1.00

1.75Refer to

1.251.75

1.25Refer to

1.25

——

1.251.75

1.251.001.001.25

1.501.751.751.501.50

Refer toFactory

1.25Factory

1.501.25

1.501.251.501.50

1.50

1.50

1.75Factory

1.751.50

1.25

1.25

1.75Factory

1.501.75

1.50Factory

1.50

1.501.501.501.75

1.50—

1.251.50

LINE SHAFTSDriving processing equipmentOther line shafts

PAPER MILLBleacher pressesConveyors, suction rollWindersAgitators (mixers)Dryer, felt stretcherStock chest calendersBeater & pulperJordansCouch, cylinders

RUBBER INDUSTRYMixerRubber calenderRubber millTire building machinesTire and tube press openersTubers or strainers

PUMPSCentrifugalGear and rotary - constant densityfluidGear and rotary - variable densityfluidProportioning pumpsReciprocating with open dischargeReciprocating - multicylinder,double actingReciprocating - single cylinderReversing duty

SEWAGE DISPOSALEQUIPMENTInside service

SCREENSRotary - stone or gravelTraveling water intake

OIL INDUSTRYOil well pumping ( not over 150%peak torque)RefineriesChillers, rotary kilnParaffin filter press

TEXTILE INDUSTRYBatchers, calendersCard machine, dry cansDyeing machinery, manglesNappers, soapersSpinner, tenter frames

1.251.00

1.001.001.001.251.251.251.251.251.25

——

1.75Refer toFactory

—

1.001.00

2.00

1.251.00

1.25Refer toFactory

1.00

1.251.00

1.751.251.251.25

1.251.251.251.251.25

1.501.25

1.251.251.251.501.501.501.501.751.50

1.751.751.75

Refer toFactory

1.50

1.251.25

2.00

1.502.00

1.50Refer toFactory

1.25

1.501.25

1.751.501.501.50

1.501.501.501.501.50

The application service factors shown above are considered typical formost applications. Where loads are lighter than normal, where units areoperated seasonally, or where unusual severe conditions exist, refer tofactory.