Browning 1026863 Single Groove Sheave 5-3/4 in Od

Product Description

The BROWNING 1026863 is a finished bore single groove sheave designed for use in belt-drive power transmission systems. Cast from iron for durability, it features a 7/8 inch bore diameter and a 5-3/4 inch outside diameter. The groove is machined to accept 4L or A-series and 3L-series V-belts, making it a straightforward drop-in component for HVAC blower assemblies, fan drives, and general industrial belt-drive setups. Installed by HVAC technicians and mechanical contractors, this sheave is a standard replacement or new-installation component for fixed-speed single-belt drive configurations.

This sheave is suited for residential and light commercial applications where a single-groove, fixed-bore drive pulley is required. Typical installation scenarios include supply and exhaust fan drives, blower wheel assemblies, and other belt-driven mechanical equipment. The finished bore eliminates field machining, allowing direct shaft mounting to a 7/8 inch shaft. No bushing is required for standard installations using this bore size.

Key Features

• Finished 7/8 inch bore — ready for direct shaft mounting with no additional machining
• 5-3/4 inch outside diameter with a 5.5 inch pitch diameter for 4L or A-series belts
• Compatible with 3L-series belts at a 5.16 inch pitch diameter
• Single groove configuration for straightforward single-belt drive setups
• Cast iron construction for wear resistance and dimensional stability
• Bore length through hub of approximately 1-5/32 inches

Compatibility

Designed as an OEM-style replacement or new-installation sheave for single-belt drive systems using 4L, A-series, or 3L-series V-belts on a 7/8 inch diameter shaft.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the unit before removing or installing any drive components. Secure the sheave to the shaft using the appropriate set screw and key, ensuring proper alignment with the mating sheave before tensioning the belt. Check belt tension and sheave alignment after installation and re-inspect after initial run-in per standard drive maintenance practice.