Browning 3694445 Qd Bushed V Belt Sheave 4 Groove

Product Description

The BROWNING 3694445 is a four-groove, quick-detachable (QD) bushed V belt sheave designed for industrial and commercial HVAC and mechanical drive applications. Manufactured from iron with a B-style QD bushing mount, this sheave accepts bore diameters from 5/8 inch up to 2-1/4 inch, making it adaptable to a range of shaft sizes without requiring a custom bore. The outside diameter measures 4.88 inches, with a 5V belt pitch diameter of 4.7 inches and a B belt pitch diameter of 4.6 inches. At 5.8 pounds, it is a solid, durable component suited for belt-driven fan and blower assemblies.

This sheave is commonly installed in belt-driven blower sections of rooftop units, air handling units, and commercial ventilation systems where 5V or A/B cross-section V belts are used. The QD bushing design allows fast field installation and removal without specialized tooling, which is a practical advantage during seasonal maintenance or motor replacements on HVAC equipment. The four-groove configuration supports multi-belt drive arrangements typical in higher-load fan applications.

Key Features

• Four grooves compatible with 5V, A, and B cross-section V belts
• QD bushed mount with B-style bushing for tool-free shaft installation and removal
• Bore range from 5/8 inch to 2-1/4 inch accommodates multiple shaft sizes
• 4.88 inch outside diameter with 4.7 inch 5V belt pitch diameter
• Iron construction for durability in belt-driven mechanical drive service
• Sold individually; no minimum order quantity beyond one unit

Compatibility

Designed for use with 5V, A, and B cross-section V belts in QD bushed sheave applications requiring a B-style bushing and a bore diameter between 5/8 inch and 2-1/4 inch.

Installation Notes

Installation is typically performed by a qualified HVAC technician or millwright. Always de-energize and lock out the motor and drive system before removing or installing sheaves. The QD bushing should be tightened evenly in alternating sequence to seat the taper bore properly against the shaft. Verify belt tension and alignment after installation per the drive manufacturer's guidelines before returning the unit to service.