Armstrong Furnace R42537-001 Fan Blade

The Armstrong Furnace R42537-001 Fan Blade is a precision-engineered 18-inch 2-blade condenser fan designed for high-efficiency heat dissipation in residential and light commercial HVAC units. Engineered with a 1/2-inch bore and fixed by a set screw, this aluminum replacement blade ensures optimal airflow across the condenser coils, maintaining critical head pressure during peak cooling cycles. As a genuine Allied Air Enterprises replacement part, it meets exact factory specifications for pitch, balance, and rotation, reducing mechanical stress on the condenser motor bearings and extending the service life of the outdoor unit. This HVAC blower component is essential for technicians performing seasonal maintenance or emergency repairs where vibration or blade deformation has compromised system performance. Integrating this OEM-spec propeller fan blade restores original airflow CFM ratings, ensuring the system operates within its designed subcooling and superheat parameters.

Key Technical Benefits

• Optimized 18" Diameter: Ensures full coverage across the coil surface area for maximum heat transfer.
• Precision Balanced 2-Blade Design: Minimizes axial vibration and reduces acoustic output during motor operation.
• Durable Aluminum Construction: Provides superior corrosion resistance in harsh outdoor environments compared to galvanized steel alternatives.
• Standard 1/2" Bore: Facilitates direct compatibility with standard NEMA frame condenser motors used in Armstrong and Allied units.

Common Questions

Does this fan blade include the mounting set screw?
Yes, this 18-inch fan blade typically ships with the integrated hub and set screw required for securing it to the motor shaft.

Will this blade replace a 3-blade or 4-blade model?
No. For proper motor loading and static pressure, you must match the original blade count and pitch specified by the equipment manufacturer.

How do I determine the correct rotation for this Armstrong replacement?
Rotation is determined by looking down at the discharge side of the blade; verify your specific unit's wiring and motor rotation before installation to ensure correct airflow direction.

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.