Electric motors are the workhorse of theindustry. Many applications exist where morethan one motor can be used or the exactreplacement is not available. LEESON makesevery effort to maximize interchangeability,mechanically and electrically, where compromisedoes not interfere with reliability and safetystandards. If you are not certain of areplacement condition, contact your localNorthern Tool & Equipment location.

Motor Selection:Identifying a motor for replacement purposesor specifying a motor for new applications canbe done easily if the following information isknown:

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Food Processing MotorsThese all stainless steel motorsare designed for extendedservice in washdown serviceapplications that you wouldfind in the food processing,bakery, beverage, chemicalprocessing and pharmaceuticalindustries. All external surfaces are 300-gradestainless steel and the full fact nameplate islaser etched into the motor frame.

Fan and Blower MotorsThese fan and blower duty motors are designed

for dependable, energy savingperformance in applicationswhere the fan is mountedon the shaft of the motor.These PSC type motors donot require a centrifugal

switch, resulting in higher reliability and becauseof their low amp design, they are energy efficient.48 frame models have a baked-on powder coatfor extra corrosion resistance in tough applications.Features include quiet ball bearings and a resilientcradle base and auto resetbuttons for motor overloadprotection. Pedestal Fanmotors are designed with aheavy-gauge yoke base that iswelded to the motor frameand they have extendedmounting studs for mountingof the fan shroud.

12 Volt DC MotorsSuitable for applications having battery or solarpowered operations, or generator supplied lowvoltage DC. These motors are high torque, con-tinuous duty designs.

Applications range frompumps to electric carts.Motors have a base speedof 1750 RPMs and have aremovable base.

Woodworking MotorsMotors designed for wood-working equipment such astable saws, planers and more.Totally enclosed designsprevent motor problemscaused by wood dust and shavings.Motors operate at 3450 RPMs and have a manualreset button for overload protection. 5/8 and7/8 shaft sizes are available and the HP rangesare 1, 1.5 and 3 HP.

Industrial – 3-Phase MotorsFor use where exposure to water, dust and

corrosives exists. Ideallysuited for use on pumps,compressors, blowers, fans,conveyors, machine toolsand other direct or belt-drivenapplications. All 230/460Vratings nameplated for 208

Volt operation. Most 60Hz models nameplatedfor 50Hz. Motors are Inverter rated to meetEPACT efficiency mandates.

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Nameplate Data:Nameplate data is the most important first stepin determining motor replacement. Much of theinformation needed can be generally obtainedfrom the nameplate of the motor to be replaced.Take time to record nameplate informationbecause it can save time, avoid confusion andmisapplication.

Important Nameplate Data includes:

Catalog Number – In many cases, for stock motors,there are cross-reference charts created by motormanufactures to cross their competitor’s motorsto their catalog numbers.

Frame – Motor manufacturers follow NEMAFrame size dimensions so that motors, havingthe same NEMA frame size are “Drop-in”replacements.

Type: (classification varies from manufacturer tomanufacturer.)

Phase: Three basic types - single-phase, three-phase or DC (Direct current).

HP: horsepower rated at full load speed.

HZ: Frequency in cycles per second. Usually 60Hz in USA, 50 Hz overseas.

RPM: Revolutions per minute of the shaft atFull load speed. Approximate motor speedswould be: 3450, 1750, 1125, and 850RPM.

Voltage: Incoming voltage rating of motor,such as 115volts, 230 volts, 460 volts, etc…

Amperage (F.L.A): Full load motor current.

Maximum ambient operating temperature incentigrade: usually +40° C (104° F).

Duty: Most motors are rated continuous.Some applications however may use motorsdesigned for intermittent, special, 15, 30 or 60minute duty.

Code: Indicated locked rotor kVA per horse-power. (Electricians use this information toproperly size what wire they need to use andwhat size breaker is needed)

ENCL (Enclosure Type): Describes motor en-closure. TEFC = Totally enclosed fan cooled,TENV = Totally enclosed non-vent, ODP =Open drip-proof, TEAO = Totally enclosed airover. DP = Drip-Proof.

Other important nameplate informationincludes: Motor service factor, Insulation classand Design (NEMA Design)

Other important non-nameplate informationwould include: Mounting Type – verify howmotor is mounted - base mount (rigid orresilient type) take measurements from oldmotor. Face mount – describe bolt-hole sizeand bolt circle and hub dimensions. If extendedbolts used to mount motor, verify length andthread-size. Describe shaft size, length andkeyway size or flat length and depth and ifshaft has any tapped holes. Verify motor shaft rotation. CW, CCW, or REV.

Application Information:

Single-Phase General Purpose MotorsODP Models: For use wherewater and dust exposure ismoderate. They are ideallysuited for use on pumps,compressors, blowers, fans,and other direct or belt-driven applications.TEFC Models: For use whereexposure to water, dust and corrosives exists.Typical applications include pumps, compressors,blowers, fans, conveyors, machine tools andother direct or belt-driven applications.

Single-Phase Farm Duty MotorsOur line of single-phase FarmDuty / Agricultural Duty Seriesof motors are designed andbuilt for the toughapplications found in theagricultural industry. Mechanical Features include:

Gasketed capacitor housing and conduit boxesprovide protection in all environments. Doublesealed ball bearings are pre-lubricated withExxon POLYREX® EM grease having operatingtemperature range of -20°F to+350°F. Rubberboot over manual protector reset buttonprovides weather protection. Applications include: Feeders, conveyors, fans,compressors, spray washers, grinders, elevators,pumps and other demanding applications thatrequire high starting torque.

Compressor Duty MotorsMotors designed for compressor duty applications,which require high break-down torque and ruggedmechanical construction.Motors are re-connectablefor both CW and CCWrotation and have a manualreset button for motor overload protection.