Browning 1027960 Single Groove Sheave 2.8in Od 5/8in Bore

Product Description

The BROWNING 1027960 is a finished bore single groove sheave designed for use with A-section or 4L-section V-belts in light- to medium-duty power transmission applications. It features a 2.8 inch outer diameter, a 5/8 inch finished bore, and a cast iron construction that provides durability under continuous rotational load. The groove width is 13/16 inches, and the overall length through the bore measures 1-1/16 inches. With a pitch diameter of 2.2 inches for 4L or A-belt profiles, this sheave delivers consistent belt engagement and stable drive ratios. HVAC technicians and mechanical contractors install this component on blower assemblies, fan drives, and similar belt-driven systems.

This sheave is suited for residential and light commercial belt drive applications where a single V-belt groove is required. Typical installations include supply fan drives, exhaust fan assemblies, and small motor-to-blower drive trains. The finished bore eliminates on-site machining and accepts a standard 5/8 inch shaft directly. It is commonly installed on fractional and small integral horsepower motors and driven shafts found in HVAC air handling equipment and general mechanical systems.

Key Features

• Finished 5/8 inch bore — no machining required, mounts directly to standard shaft
• Single groove profile compatible with 4L and A-section V-belts
• 2.8 inch outer diameter with 2.2 inch pitch diameter for accurate belt ratio calculations
• 13/16 inch groove width provides proper belt seating and alignment
• Cast iron construction resists wear and maintains dimensional stability under load
• Compact 1-1/16 inch through-bore length suits tight drive configurations

Compatibility

Designed as an OEM-style replacement or new-installation single groove sheave for belt drive systems using 4L or A-section V-belts on 5/8 inch shafts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. De-energize and lock out the motor before mounting or removing any sheave. Verify shaft diameter matches the 5/8 inch finished bore and use a properly sized setscrew or key as required by the drive design. After installation, check belt tension and sheave alignment with a straightedge or laser alignment tool before returning the system to service.