{"product_id":"20909","title":"18\" Aluminum Fan Blade 4 Blade CW 33° Pitch – Replaces Revcor R41811 – NBK-20909","description":"\u003ch2\u003eNBK-20909 – 18\" Aluminum Fan Blade, 4 Blade, Fixed Hub, CW, 33° Pitch – NBK\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNBK-20909 Aluminum Fan Blade\u003c\/strong\u003e is a high-quality OEM-equivalent replacement designed for HVAC condenser and air movement applications. Featuring an \u003cstrong\u003e18-inch diameter\u003c\/strong\u003e, \u003cstrong\u003e4-blade design\u003c\/strong\u003e, \u003cstrong\u003efixed hub\u003c\/strong\u003e, and \u003cstrong\u003eclockwise rotation\u003c\/strong\u003e, this blade is engineered with a \u003cstrong\u003e33-degree pitch\u003c\/strong\u003e to deliver efficient airflow and reliable system performance. It is a direct replacement for the widely used \u003cstrong\u003eRevcor R41811\u003c\/strong\u003e fan blade.\u003c\/p\u003e\n\u003cp\u003eManufactured 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.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-Compatible Replacement:\u003c\/strong\u003e Direct replacement for Revcor R41811\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficient Airflow Design:\u003c\/strong\u003e 33-degree pitch optimized for condenser performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Aluminum Construction:\u003c\/strong\u003e Lightweight, corrosion-resistant design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Hub Configuration:\u003c\/strong\u003e Ensures secure mounting and consistent rotation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 20909\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Fan Blade \/ HVAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade Count:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation:\u003c\/strong\u003e Clockwise (CW)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch:\u003c\/strong\u003e 33 Degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub Type:\u003c\/strong\u003e Fixed Hub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e HVAC condenser and air movement systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEquivalent To\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevcor:\u003c\/strong\u003e R41811, R41810\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevcor \/ Grainger:\u003c\/strong\u003e 4C891\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevcor:\u003c\/strong\u003e FB4CR1833\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the NBK-20909?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eNBK-20909\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVerify blade diameter, rotation direction, and pitch match the original fan blade.\u003c\/li\u003e\n\u003cli\u003eDisconnect power to the unit before removing or installing fan blades.\u003c\/li\u003e\n\u003cli\u003eEnsure the blade is securely mounted and properly aligned on the motor shaft.\u003c\/li\u003e\n\u003cli\u003eCheck for clearance around the shroud before restoring power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePairs Well With\u003c\/h3\u003e\n\u003cp\u003eCondenser Fan Motors, Fan Blade Hub Hardware, Motor Mounting Brackets, HVAC Electrical Components\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIAL ORDER NOTICE:\u003c\/strong\u003e This is a special order item sourced from NBK. Please allow 1–2 business days for processing prior to shipment.\u003c\/p\u003e","brand":"Fan Blades","offers":[{"title":"Default Title","offer_id":52401236541808,"sku":"SO-20909","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/4463\/3444\/files\/20909-R41811-scaled.webp?v=1770690195","url":"https:\/\/total-hearth.com\/products\/20909","provider":"Total Hearth","version":"1.0","type":"link"}