Marathon Motors MK281 K281 Fan and Blower Motor - MK281

Marathon Motors MK281 K281 Fan and Blower Motor - MK281

The Marathon Motors MK281 K281 is a high-performance 1/4 HP fan and blower motor designed for industrial and HVAC applications. Operating at 1725 RPM, this 3-phase motor delivers reliable and efficient power for air handling units, blowers, and ventilation systems.

Equipped with a Totally Enclosed Non-Ventilated (TENV) enclosure, this motor ensures protection from dust and debris, extending its lifespan and maintaining consistent performance in demanding environments. It features a reversible rotation (CCW/CW), making it versatile for various installation setups.

Built for durability, the motor includes ball bearings for smooth operation and low maintenance. Its resilient base mounting allows for secure installation, and its B-class insulation ensures reliable operation in a wide temperature range.

Specifications

What our Experts Think

• Power & Speed: 1/4 HP at 1725 RPM, suitable for continuous-duty applications.

• Voltage & Phase: 230/460V, 3-phase, 60Hz operation.

• Enclosure: Totally Enclosed Non-Ventilated (TENV), protecting against dust and moisture.

• Frame Size: 48, compatible with standard mounting configurations.

• Mounting Type: Resilient base for vibration absorption.

• Service Factor: 1.0, designed for continuous operation without overload.

• Amperage: 1.4/0.7 amps at full load.

• Insulation Class: Class B, ensuring reliable performance under standard operating conditions.

• Rotation: Reversible for flexible installation options.

Q&A

Q: What is the Marathon Motors MK281 K281 Fan and Blower Motor?
A: The Marathon MK281 is a high-performance, 1/4 HP, 1725 RPM, 3-phase motor specifically designed for fan and blower applications. With its durable construction and reliable operation, it's ideal for HVAC systems, ventilation, and air-moving equipment.

Q: Where is the Marathon MK281 motor commonly used?
A: The MK281 is designed for use in fan and blower systems, including HVAC systems, exhaust fans, air handling units, and general ventilation. It's ideal for environments that require efficient airflow and ventilation with a compact motor.

Q: What makes the MK281 motor stand out?
A:

• Reliable and Efficient: Designed to provide efficient, long-term performance while minimizing energy costs.

• Totally Enclosed Non-Ventilated (TENV) Enclosure: Provides protection from external elements such as dust, dirt, and moisture, extending motor life.

• Reversible Rotation: The motor can be easily adjusted for clockwise or counterclockwise rotation, offering versatility in installation and usage.

• Compact Design: The 48-frame size allows for easy installation in tight spaces.

Q: Is this motor suitable for continuous operation?
A: Yes, the MK281 motor is designed for continuous operation, making it ideal for systems that need to run around the clock, such as ventilation and cooling systems.

Q: Can the MK281 motor be used with a Variable Frequency Drive (VFD)?
A: Yes, the MK281 is compatible with Variable Frequency Drives (VFDs), allowing for flexible control over motor speed. This is especially useful for applications requiring adjustable airflow or specific speed settings.

Q: Why should I choose the Marathon MK281 motor for my application?
A: The MK281 motor offers a powerful combination of energy efficiency, durable construction, and versatility for demanding fan and blower applications. Whether you’re installing a new HVAC system or replacing an older motor, the MK281 is built to provide reliable, long-term performance.

Maintenance Tips

• Regular Inspections: Examine the motor every 500 hours or quarterly. Ensure ventilation openings are clear of dirt, oil, or water to avoid overheating.

• Lubrication: If the motor is not labeled "Permanently Lubricated," apply appropriate grease to the bearings, ensuring compatibility with existing grease and avoiding over-greasing.

• Electrical Connections: Periodically check all electrical connectors to ensure they are tight and free from corrosion.

• Cleaning: Keep the motor and surrounding area free of dust and debris to prevent clogging the air vents.

• Performance Monitoring: Regularly check motor performance to detect any decrease in efficiency or power.