Browning 3694353 3-groove Qd V-belt Sheave 12.68 in Od

Product Description

The BROWNING 3694353 is a three-groove, Quick Detachable (QD) bushed V-belt sheave designed for industrial and commercial HVAC drive systems. It accepts standard A, B, and 5V cross-section belts and is machined to a 12.68-inch outside diameter with belt pitch diameters of 12.0 inches for A-section, 12.4 inches for B-section, and 12.5 inches for 5V-section belts. The QD bushing interface allows fast, accurate shaft mounting and removal without special tooling. Weighing 22.45 pounds, this sheave suits heavy-duty blower and fan drive applications where precise belt alignment and reliable torque transfer are required. Licensed HVAC mechanics and millwrights are the typical installers.

This sheave is used in belt-driven air handling units, commercial rooftop units, centrifugal fans, and industrial blower systems where a three-groove configuration is needed to distribute load across multiple belts. It accepts a B-style QD bushing with bore sizes ranging from 5/8 inch to 2-1/4 inches, covering a wide range of shaft diameters common in fan and blower drive trains. It is suitable for both new installations and direct replacement of worn or undersized sheaves in existing belt drive systems.

Key Features

• Three grooves accommodate A, B, and 5V cross-section V-belts
• 12.68-inch outside diameter with 12.5-inch 5V belt pitch diameter
• QD bushing mount (B-style) for tool-friendly installation and removal
• Bore range of 5/8 inch to 2-1/4 inches fits a wide variety of drive shafts
• 22.45-pound cast construction suited for continuous-duty fan and blower drives

Compatibility

Designed as an OEM-style replacement or new-installation sheave for three-groove V-belt drive systems using B-style QD bushings in commercial HVAC, air handling, and industrial fan applications.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. De-energize and lock out the drive system completely before removing or mounting any sheave. Ensure the mating B-style QD bushing is sourced separately and that shaft diameter falls within the 5/8-inch to 2-1/4-inch bore range before ordering. After mounting, verify sheave alignment with a straightedge or laser tool and check belt tension per the belt manufacturer specifications before returning the unit to service.