Browning 3694189 3-groove Qd V-belt Sheave 5.28 in Od

Product Description

The BROWNING 3694189 is a three-groove, Quick Detachable (QD) bushed V-belt sheave designed for industrial and commercial HVAC drive systems. It accepts A, B, and 5V cross-section belts and accommodates bore diameters from 5/8 inch up to 2-1/4 inch, making it adaptable to a range of shaft sizes. The outside diameter measures 5.28 inches, with a belt pitch diameter of 5.1 inches for 5V belts, 5.0 inches for B-section belts, and 4.6 inches for A-section belts. Weighing 5.9 pounds, this sheave uses a B-style QD bushing for secure, precise mounting on drive shafts. Licensed HVAC and mechanical technicians install this type of component when replacing or rebuilding blower and fan drive assemblies.

This sheave is suited for belt-drive applications in commercial rooftop units, air handling units, industrial fans, and other equipment that relies on V-belt power transmission. The QD bushing design allows the sheave to be mounted and removed without specialty bearing pullers, reducing labor time during scheduled maintenance or drive replacement. It is particularly common in HVAC blower assemblies where variable pitch or fixed-pitch drives require a reliable, field-replaceable sheave with a wide bore range.

Key Features

• Three grooves accept A, B, and 5V cross-section V-belts
• Outside diameter of 5.28 inches with 5.1-inch 5V belt pitch diameter
• Bore range from 5/8 inch to 2-1/4 inch accommodates multiple shaft sizes
• B-style Quick Detachable bushing for tool-accessible installation and removal
• Weighs 5.9 pounds — suitable for standard fan and blower drive shaft loads

Compatibility

Designed as an OEM-style replacement sheave for commercial and industrial V-belt drive systems requiring a three-groove QD bushed pulley with a 5.28-inch outside diameter. Accepts B-style QD bushings. Compatible with A, B, and 5V cross-section V-belts.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all electrical power to the drive unit before removing existing sheave components. The QD bushing must be properly seated and fastened according to standard torque procedures for the bushing size before returning the drive to service. Inspect belt tension and alignment after installation to prevent premature belt or bearing wear.