Browning 1027978 Single Groove Sheave 2.95 in Od 3/4 in Bore

Product Description

The BROWNING 1027978 is a finished bore single groove sheave designed for V-belt drive applications in HVAC, industrial, and mechanical systems. It features a 3/4 inch bore diameter and a 2.95 inch outer diameter, with a cast iron construction that provides durability under continuous load. The groove is machined to accommodate 4L or A-type V-belts, with a pitch diameter of 2.2 inches. The overall length through the bore measures 1-1/16 inches. This sheave is installed by HVAC technicians, millwrights, and mechanical contractors as part of belt-driven blower or fan assemblies.

This sheave is suited for residential and light commercial belt drive systems where a compact, single groove pulley is required. It is commonly installed on blower motor shafts in air handling units, furnaces, and ventilation equipment. The finished bore is machined to final tolerance, accepting a 3/4 inch shaft without additional boring. The 13/16 inch face width accommodates standard A or 4L V-belts used in typical HVAC blower drive configurations.

Key Features

• Finished bore at 3/4 inch — ready to install on standard motor or blower shafts without additional machining
• Single groove design accepts A-type or 4L V-belts
• 2.2 inch pitch diameter for accurate belt speed ratio calculations
• Cast iron construction for wear resistance and dimensional stability under load
• 13/16 inch face width suits standard V-belt widths
• Compact 2.95 inch OD fits tight drive configurations in air handler and blower assemblies

Compatibility

Designed as an OEM-style replacement or direct-fit sheave for belt-driven blower and fan applications using A-type or 4L V-belts with a 3/4 inch shaft bore.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all power to the unit before removing or installing any drive components. Align the sheave and mating pulley using a straightedge or laser alignment tool to minimize belt wear and vibration. Verify belt tension after installation per the belt manufacturer's deflection guidelines before returning the unit to service.