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General purpose AC induction motors are used to power pumps, blowers, conveyors and other machinery. Inverter-rated motors can be used with variable frequency drives to improve efficiency. From small 1-phase to large 3-phase motors, models are available for general use or hazardous locations.
General Purpose and Inverter Rated AC Motors
Category Selection
General purpose AC induction motors cover a wide range of applications and are typically controlled by across-the-line starters, i.e. contactors, manual motor starters, etc. All AutomationDirect general purpose 3-phase motors are inverter rated, allowing them to be controlled by AC drives since they can withstand the higher voltage spikes produced by these VFDs.
- Sizes from fractional horsepower up to 300hp, depending on series
- Popular and well-trusted models from Marathon, Leeson, WEG, and Ironhorse brands
- Enclosure styles/ratings may include open-drip-proof (ODP); totally enclosed (TEFC); washdown; and hazardous location rated
For part listings and specifications, go to Shop Now
IronHorse® General Purpose Rolled Steel
- TEFC 56C-frame single phase 1/3hp to 2hp
- TEFC 56C/56HC-frame 3-phase 1/3hp to 3hp
- Replacement motor capacitors fans, fan covers, mounting bases, terminal boxes available
- STABLE™ adjustable motor slide bases available for motor mounting
Starting at
$167.00
(MTR2-P33-3BD36)
IronHorse® MTS Series
IronHorse MTS stainless steel washdown motors are built to handle the harshest environments; available in TEFC and TENV enclosures.
- Sizes from 1/3hp to 20hp!
- 1200, 1800, and 3600 RPM
- IP69K protection
- 208 - 230/460 VAC 3-phase
- Premium efficiency (EISA compliant)
- Inverter-rated
- C-Face with rigid base and round body (footless)
- 304 stainless steel frame, end bracket, junction box and hardware
- Class I, Div 2 hazardous locations
- BISSC certified
Starting at
$401.00
(MTSP-P33-3BD36R)
IronHorse® General Purpose Cast Iron
- 3-phase design with Premium Efficiency rating
- 1hp to 300hp
- Totally Enclosed Fan Cooled (TEFC) enclosure
- NEMA TC-frame (C-face) and T-frame
- C-face kits available for motors over 30hp
- Cast iron frame with ribbed design for maximum cooling
- C-flange kits for flange mounting of T-frame motors
- STABLE™ adjustable motor slide bases available for any NEMA motor frame size from 56 to 449T
Starting at
$307.00
(MTCP2-001-3BD18)
IronHorse® Open Drip-proof
- 1hp to 50hp
- Open drip-proof enclosure
- Rolled steel shell frame / cast aluminum or cast iron end bells
- Large easy-to-wire junction box with rubber gasket
- Fixed base
- High tensile strength steel shaft
- Electrically reversible
- Inverter capable (three-phase only)
- Service Factor: 1.15 across-the-line (1.0 for 3-phase with AC drive)
Starting at
$262.00
(MTDP-001-3BD18)
Marathon Open Drip-proof
Marathon single-phase steel ODP motors are available from 1/4hp to 5hp.
Rigid Base Models
- Ball bearings (except as noted)
- Economical capacitor start designs
C-Face Footed (Rigid Base) Models
- Ball bearings, mechanically locked on shaft end
- NEMA service factors
- Capacitor start, capacitor run design for higher efficiency
Resilient Base Models
- For fan and blower applications
- Capacitor start/capacitor run design
- Thermal protection on most models
Starting at
$175.00
(4354)
Marathon NEMA Premium XRI®
- 1hp to 2hp, TEFC enclosure
- Meets or exceeds NEMA Premium efficiency ratings
- Optimize motor system efficiency, reduce electrical power consumption and costs, and improve system reliability
- Substantial energy savings when used on high cycle or long run time applications
- Rolled steel construction with C-face rigid base mounting
Starting at
$655.00
(E2001A)
Marathon Globetrotter™
The well-known Marathon Globetrotter series of high-quality general purpose motors are also inverter rated for a wide variety of applications.
- Sizes up to 200hp
- 208-230/460 VAC
- Rigid Base and C-face with Base mounting
- Meets or exceeds NEMA Premium® efficiencies
- Steel drip-proof IP22 rating, rolled steel TEFC IP43 rating, or cast-iron TEFC IP55 rating
- Cast-iron models are Div 2/Zone 2 Class 1 (gases), Groups A, B, C, D
- Inverter ratings - 10:1 variable torque and 2:1 or 10:1 constant torque, depending on model
- 1.15 Service factor on sinewave, 1.0 service factor on IGBT power
Starting at
$610.00
(GT0010A)
Leeson Washguard SST
Stainless steel Washguard SST motors from Leeson are built tough, intended to withstand the most demanding washdown environments.
- Sizes up to 2hp
- 115/230 VAC 1-phase and 230/460 VAC 3-phase
- All exterior components of 300 Series stainless steel, including motor frame, endshield and conduit box castings
- Interior corrosion protection
- Shaft seals on both ends of TEFC motors
- Sealed bearings with internally locked shaft end bearing
- Mounting options include C-Face with base, or C-Face without base
- Meets IP55 enclosure protection
Starting at
$831.00
(191475.00)
Leeson Washguard White Duck
Washguard White Duck motors from Leeson have a white epoxy finish that adds superior chemical resistance in addition to withstanding harsh washdown applications.
- The original moisture-shedding "duck" motor
- Sizes up to 10hp
- 115/230 VAC 1-phase and 230/460 VAC 3-phase
- Standard or premium efficiency ratings
- Durable USDA-approved white epoxy finish
- Stainless steel shaft, conduit box cover, nameplate, fan guard
- Mounting options include rigid base, C-Face with base, or C-Face without base
- Drains for all mounting orientations
- Meets IP55 enclosure protection
Starting at
$533.00
(114311.00)
WEG S Series
New!
WEG S series Rolled Steel general purpose AC induction motors provide dependable operation and a long lifespan for a low cost.
- 1/4hp to 3hp, 1-phase or 3-phase
- 120/230 VAC in 3600 and 1800 RPM ratings
- 208-230/460 VAC in 3600, 1800, and 1200 RPM ratings
- Premium Efficiency rating for 3-phase 1HP and higher
- Class F insulation
- IP55 environmental rating
- Frame sizes: NEMA 56 to 143/145
- Rigid base, C-face Rigid base or C-face Footless mounting
- TEFC enclosure
- Certified Class I, Div 2, Groups A,B,C,D for 3-phase models
- Matches well with WEG automation products: CFW VFDs, SSW softstarters, CWB contactors, (P)ESW Enclosed starters
Starting at
$193.00
(.2536ES3E56C-S)
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