Browning 1042449 BK47H Qd Bushed V Belt Sheave 1 Groove

Product Description

The BROWNING 1042449 is the BK47H quick-detachable (QD) bushed V-belt sheave, a single-groove cast iron pulley designed for power transmission applications in HVAC, industrial, and mechanical drive systems. The sheave features a 4.45-inch outside diameter and accepts an H-style QD bushing, allowing bore sizes from 3/8 inch up to 1-1/2 inch to suit a wide range of shaft sizes. With a belt pitch A diameter of 3.7 inches and compatibility with A and B section V-belts, this sheave delivers reliable torque transfer in fan, blower, and pump drive assemblies. Installation and removal are handled by a licensed or qualified mechanical technician familiar with V-belt drive systems.

The BK47H sheave is suited for single-groove V-belt drive systems found in commercial and residential HVAC air handlers, exhaust fans, blowers, and general industrial equipment. The H-style QD bushing system allows for quick installation and removal without special tooling beyond standard hand tools, making it practical for routine service and belt replacement scenarios. It accommodates A and B section V-belt trade sizes, giving technicians flexibility when matching drive components during installation or retrofit work.

Key Features

• Single-groove design for A and B section V-belts
• 4.45-inch outside diameter with 3.7-inch belt pitch A diameter
• H-style QD bushing accepts bore diameters from 3/8 inch to 1-1/2 inch
• Cast iron construction for durability in continuous-duty drive applications
• Quick-detachable bushing system simplifies installation and removal

Compatibility

Designed for use with A and B section V-belts and H-style QD bushings. Suitable as an OEM-style replacement or new-installation sheave in single-groove V-belt drive systems where an H-bushing mount and 4.45-inch OD are specified.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing sheaves. Ensure the QD bushing bore is matched to the shaft diameter before tightening, and verify belt tension and alignment after installation per drive system requirements. Do not operate the drive without all guards in place.