Browning AK44X7/8 Sheave

The Browning AK44X7/8 Sheave is a precision-engineered single groove cast iron pulley designed for high-performance power transmission in commercial HVACR systems. Featuring a 4.25" outside diameter and a 7/8" fixed bore, this sheave is manufactured from high-grade grey cast iron, providing the necessary mass and durability to reduce vibration and extend bearing life in air handlers and condensers. It is engineered for versatility, utilizing a universal groove profile compatible with 3L, 4L, and A section V-belts. The inclusion of a standard keyway and setscrew ensures a secure fit on the motor or fan shaft, preventing slippage during high-torque startup. For contractors performing routine maintenance or system overhauls, the Browning AK series remains the industry standard for fixed bore sheaves due to its consistent machining tolerances and static balance, making it a reliable choice for HVAC belt drive replacement projects requiring precise static pressure management.

• High-Grade Cast Iron Construction: Provides superior wear resistance and thermal dissipation compared to stamped steel alternatives.
• Multi-Belt Compatibility: Designed to run A belt sheaves, 4L, and 3L profiles, reducing the need for localized truck stock variety.
• Precision Machined Bore: The 7/8 inch fixed bore is finished to tight tolerances to ensure easy installation and prevent shaft galling.
• Static Balance: Minimizes rotational vibration, protecting the motor bearings and ensuring quiet operation in noise-sensitive environments.

What belts can be used with the Browning AK44X7/8?
This sheave is specifically designed to accommodate 3L, 4L, and A-section V-belts, making it a highly adaptable component for various fractional horsepower applications.

Does this sheave include the setscrew?
Yes, the AK44X7/8 comes equipped with a standard setscrew over the keyway to ensure the sheave remains locked in position on the shaft under load.

How do I determine the pitch diameter?
While the outside diameter is 4.25", the pitch diameter varies slightly depending on the belt section used (typically 3.8" for A belts and 3.46" for 3L belts), which must be accounted for when calculating fan RPM.

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.