Browning 1010784 3B68Q Qd Bushed V Belt Sheave 3 Groove

Product Description

The BROWNING 1010784 is a three-groove, QD bushed V belt sheave designed for industrial belt-drive applications. Using a Q1 bushing style, this sheave accepts a quick-disconnect bushing insert, allowing straightforward bore sizing without machining the sheave body directly. The outside diameter measures 7.15 inches, with a belt pitch diameter of 6.4 inches for A-section belts and 6.8 inches for B-section belts. Bore diameter ranges from 3/4 inch to 2-11/16 inches, accommodating a wide variety of shaft sizes. At 12.75 pounds, this is a substantial cast component suited for HVAC blowers, fans, pumps, and other rotating equipment where reliable torque transfer is required.

This sheave is suited for use in commercial and industrial mechanical systems, including air handling units, centrifugal fans, blower assemblies, and pump drives. It is typically installed by mechanical contractors, millwrights, and HVAC technicians during equipment installation or belt-drive maintenance. The QD bushing design simplifies field installation and bushing replacement without pulling the entire sheave from the shaft.

Key Features

• Three-groove configuration supports multi-belt drive setups for increased torque capacity
• Q1 QD bushing style allows field bore sizing across a range of shaft diameters
• Bore range from 3/4 inch to 2-11/16 inches suits a wide variety of shaft sizes
• A-section belt pitch diameter of 6.4 inches and B-section belt pitch diameter of 6.8 inches
• 7.15 inch outside diameter for precise drive ratio calculations
• Weighs 12.75 pounds — robust cast construction appropriate for continuous-duty drives

Compatibility

Designed for use with standard A-section and B-section V belts in QD bushed sheave drive systems requiring a Q1 bushing style and a bore range of 3/4 inch to 2-11/16 inches.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. Shut down and lock out all power to the drive system before beginning work. The Q1 QD bushing must be sized and torqued to the shaft according to the bushing manufacturer specifications before operating the drive. Verify belt tension and sheave alignment with a straightedge or laser alignment tool after installation to prevent premature belt and bearing wear.