Eastern Air Devices LH2331-59 Synchronous Motor

The Eastern Air Devices LH2331-59 is a compact synchronous motor designed for applications requiring constant speed and reliable torque output. Operating on 120VAC at 60Hz, it delivers a fixed speed of 72 RPM with a torque rating of 200 oz-in, making it suitable for timing mechanisms, conveyor systems, small machinery drives, and automation equipment where precise, synchronous rotation is essential. The motor includes a 2.3 mfd capacitor for phase shifting, ensuring smooth operation. Key features include a NEMA 23-compatible frame for easy mounting, a pinion gear on the shaft for direct drive applications, and robust construction for industrial environments. Advantages over similar products include high torque density in a small footprint, low power consumption at 0.23 amps, and consistent performance without the need for complex controllers, unlike stepper motors. Drawbacks may include fixed speed limiting flexibility and the requirement for an external capacitor. Based on image analysis, this unit appears used with minor cosmetic wear, intact wiring, and no visible damage, suggesting good operational condition. For detailed specs, refer to manufacturer datasheets from EAO (successor to Eastern Air Devices). Estimated market price for used units ranges from $50-150 USD, depending on condition.