18" Aluminum Fan Blade 4 Blade CW 33° Pitch – Replaces Revcor R41811 – NBK-20909

NBK-20909 – 18" Aluminum Fan Blade, 4 Blade, Fixed Hub, CW, 33° Pitch – NBK

The NBK-20909 Aluminum Fan Blade is a high-quality OEM-equivalent replacement designed for HVAC condenser and air movement applications. Featuring an 18-inch diameter, 4-blade design, fixed hub, and clockwise rotation, this blade is engineered with a 33-degree pitch to deliver efficient airflow and reliable system performance. It is a direct replacement for the widely used Revcor R41811 fan blade.

Manufactured to meet or exceed OEM specifications, the NBK-20909 provides precise balance and durability, making it an ideal solution for HVAC technicians servicing condenser units and ventilation equipment.

Key Features

• OEM-Compatible Replacement: Direct replacement for Revcor R41811
• Efficient Airflow Design: 33-degree pitch optimized for condenser performance
• Durable Aluminum Construction: Lightweight, corrosion-resistant design
• Fixed Hub Configuration: Ensures secure mounting and consistent rotation

Specifications

• SKU: 20909
• Category: Fan Blade / HVAC
• Material: Aluminum
• Diameter: 18 inches
• Blade Count: 4
• Rotation: Clockwise (CW)
• Pitch: 33 Degrees
• Hub Type: Fixed Hub
• Application: HVAC condenser and air movement systems

Equivalent To

• Revcor: R41811, R41810
• Revcor / Grainger: 4C891
• Revcor: FB4CR1833

Why Choose the NBK-20909?

The NBK-20909 is a trusted aluminum fan blade replacement for HVAC professionals seeking OEM-level compatibility and dependable airflow performance. Its balanced construction and precise pitch help maintain system efficiency and reduce vibration.

Installation Tips

• Verify blade diameter, rotation direction, and pitch match the original fan blade.
• Disconnect power to the unit before removing or installing fan blades.
• Ensure the blade is securely mounted and properly aligned on the motor shaft.
• Check for clearance around the shroud before restoring power.

Pairs Well With

Condenser Fan Motors, Fan Blade Hub Hardware, Motor Mounting Brackets, HVAC Electrical Components

SPECIAL ORDER NOTICE: This is a special order item sourced from NBK. Please allow 1–2 business days for processing prior to shipment.