Armstrong Furnace R47538-001 Fan Blade

The Armstrong Furnace R47538-001 Fan Blade is a heavy-duty condenser fan blade replacement engineered for precision airflow in residential and light commercial HVAC systems. Featuring a 24-inch diameter and a 3-blade configuration, this component is designed to maintain optimal static pressure and heat dissipation across the condenser coil. The 1/2-inch bore ensures compatibility with standard NEMA 48 frame motors commonly found in Allied Air and Armstrong equipment. Constructed for durability, this aluminum-wing blade minimizes vibration and mechanical stress on the motor bearings, extending the service life of the outdoor unit. Proper pitch alignment and balance are critical for HVAC energy efficiency, making this an essential OEM replacement part for technicians restoring system performance to factory specifications. This Armstrong AC fan blade provides the necessary cubic feet per minute (CFM) output to prevent compressor overheating during high-ambient operation.

Key Benefits

• Precision Balance: Reduces noise levels and prevents premature condenser motor shaft wear.
• High Airflow Capacity: The 24-inch 3-blade design optimizes heat transfer intervals for improved SEER ratings.
• Durable Construction: Engineered to resist corrosion and withstand harsh environmental exposure in outdoor units.
• Direct Fit Compatibility: Ensures seamless HVAC part replacement for specific Armstrong and Lennox-family models.

Common Questions

How do I verify the bore size for my condenser motor?
This blade features a 1/2-inch hub. Always measure the motor shaft diameter with a micrometer or check the motor nameplate specs to ensure a secure fit before installation.

Can I use a 3-blade fan to replace a 4-blade fan?
It is critical to match the blade pitch and count of the original HVAC fan assembly to maintain calibrated airflow and prevent motor overload.

Does this blade include the set screw?
Most condenser fan blades utilize a standard set screw on the hub, but it is recommended to inspect the condition of your existing hardware during the HVAC repair process.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

This item is not eligible for free shipping.