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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 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
STABLE™ adjustable motor slide bases available for motor mounting
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
208 - 230/460 VAC 3-phase
Premium efficiency (EISA compliant)
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
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
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
High tensile strength steel shaft
Inverter capable (three-phase only)
Service Factor: 1.15 across-the-line (1.0 for 3-phase with AC drive)
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
The well-known Marathon Globetrotter series of high-quality general purpose motors are also inverter rated for a wide variety of applications.