Browning 3694312 3-groove Qd V-belt Sheave 8.88 Inch Od

Product Description

The BROWNING 3694312 is a three-groove, Quick Detachable (QD) bushed V-belt sheave designed for industrial and HVAC belt-drive systems. Manufactured from iron, this sheave accepts B-style QD bushings and accommodates bore diameters from 0.625 inches up to 2.25 inches, making it adaptable to a range of shaft sizes without requiring a dedicated sheave per bore. The outside diameter measures 8.88 inches. Belt pitch diameters are 8.7 inches for 5V cross-section belts, 8.6 inches for B cross-section, and 8.2 inches for A cross-section belts. Licensed HVAC mechanics, millwrights, and mechanical contractors install this sheave in blower, fan, and pump drive assemblies.

This sheave is suited for residential and light commercial HVAC air handler and rooftop unit fan drives, as well as industrial pump and blower applications where 5V, A, or B cross-section V-belts are specified. The three-groove configuration supports multi-belt drives that require higher torque capacity or redundancy compared to single-belt setups. The QD bushing interface allows field installation and removal with standard hand tools, reducing downtime during sheave replacement or belt retensioning service calls.

Key Features

• Three grooves compatible with 5V, A, and B cross-section V-belts
• QD bushing mount accepts B-style bushings for tool-friendly installation and removal
• Bore diameter range of 0.625 inches to 2.25 inches fits multiple shaft sizes
• 8.88 inch outside diameter with belt pitch diameters of 8.7 inches (5V), 8.6 inches (B), and 8.2 inches (A)
• Iron construction for durability in continuous-duty drive applications
• Single-unit packaging with no minimum order multiplier beyond one unit

Compatibility

Designed as an OEM-style replacement or upgrade sheave for belt-drive assemblies using 5V, A, or B cross-section V-belts with B-style QD bushings. Compatible belt trade sizes include 5V, A, and B per the manufacturer attribute data. Verify shaft diameter falls within the 0.625 inch to 2.25 inch bore range before ordering a bushing.

Installation Notes

Installation and removal should be performed by a qualified mechanic or HVAC technician following the equipment manufacturer's drive design specifications. Disconnect and lock out all power to the driven equipment before removing guards or handling sheaves and belts. Use the QD bushing hardware torque sequence specified by the bushing manufacturer to ensure even seating on the shaft. Inspect belt tension and sheave alignment after installation per ANSI/HVAC drive standards to prevent premature belt and bearing wear.