Cast Iron Frame Electric Motors
Cast-iron frame electric motors are engineered for heavy industrial duty, delivering maximum mechanical strength, vibration resistance, and long-term reliability in the harshest operating environments.
Designed for continuous duty in manufacturing, mining, chemical plants, and energy systems, cast-iron motors provide a rigid housing structure that protects internal components while ensuring stable, low-vibration performance under heavy mechanical loads.
Available in ODP, TEFC, and Explosion-Proof (TEXP) designs, Crossman supplies cast-iron electric motors from top-tier global manufacturers — all meeting NEMA, CSA, and UL industrial standards.
Typical Specifications
Specification Range / Detail
Frame Material Rigid Cast Iron
Horsepower Range 1 – 500 HP+ (depending on configuration)
Speed (RPM) 900 / 1200 / 1800 / 3600
Enclosures ODP / TEFC / TEXP
Mounting Options Foot, C-Face, D-Flange, Vertical P-Base
Frame Sizes 143T – 449T+
Voltage Options 208 / 230 / 460 / 575 V & Medium Voltage
Certifications NEMA MG-1, UL, CSA, IEEE
Duty Rating Continuous duty (S1)
Key Advantages of Cast-Iron Motors
Extreme Durability Handles mechanical shock, load changes, and tough industrial environments.
High Vibration Resistance Thick cast-iron housing minimizes deflection for stable rotor alignment.
Heat & Corrosion Tolerance Excellent performance in elevated temperature or corrosive environments.
Long Bearing & Seal Life Rigid structure supports enhanced bearing stability and lubrication retention.
Noise Reduction Dense frame construction dampens vibration and acoustic resonance.
Ideal Applications
Cast-iron motors are preferred in demanding, high-duty industrial settings:
Mining & aggregate conveyors / crushers
Oil & gas facilities & refineries
Pulp & paper processing systems
Chemical & petrochemical manufacturing
Cement plants & industrial mills
Wastewater & municipal pumping stations
Material handling & heavy conveyors
Where harsh environments meet continuous operation, cast iron is the industry standard.
Enclosure Types
Performance & Design Features
Cast-iron end shields & bearing housings for reduced shaft deflection
Inverter-duty windings for VFD applications
Class F or H insulation for thermal protection
High-grade bearings for long service intervals
Oversized cooling fins (TEFC) for improved heat dissipation
Laser-balanced rotors for low vibration and long life
These motors are purpose-built for environments where uptime is critical and failure is costly.
Cast Iron vs Other Frame Materials
Request a Quote or Spec Sheet
Need a cast-iron electric motor for a demanding industrial application?
Our team will size the correct motor based on load, environment, duty cycle, and mounting requirements.
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