Browning 1028455 Single Groove Sheave 5/8 Bore 4.95 Od

Product Description

The BROWNING 1028455 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Cast from iron for durability under continuous operation, this sheave features a 5/8 inch finished bore and a 4.95 inch outer diameter. The belt pitch diameter for Type B or A belts measures 4.2 inches, and the overall length through the bore is 1-5/32 inches. It is installed by HVAC technicians and millwrights in belt-driven fan and blower assemblies where precise pulley sizing affects airflow and equipment efficiency.

This sheave is suited for residential and light commercial belt-drive applications, including HVAC air handlers, blower assemblies, and general power transmission setups using Type 4L or Type A V-belts. The 5/8 inch finished bore allows direct shaft mounting without additional machining, making it a straightforward replacement or new-installation component for standard belt-drive configurations.

Key Features

• Finished bore at 5/8 inch — no additional machining required for standard shaft fitment
• Single groove design accepts Type 4L or Type A V-belts
• Belt pitch diameter of 4.2 inches for accurate drive ratio calculations
• Cast iron construction for wear resistance and dimensional stability
• Overall length through bore of 1-5/32 inches suits standard sheave spacing
• UNSPSC Code 31171804 for procurement system compatibility

Compatibility

Designed as a standard finished bore replacement sheave for belt-drive systems using Type 4L or Type A V-belts with a 5/8 inch shaft diameter.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified millwright. Disconnect and lock out electrical power to the drive system before removing or installing any sheave. Ensure the shaft diameter matches the 5/8 inch finished bore before mounting, and verify belt alignment and tension after installation per the equipment manufacturer's specifications. A sheave puller and shaft key of appropriate size may be required depending on the drive assembly.