Browning 1027457 Single Groove Sheave 1in Bore 10.25in Od

Product Description

The BROWNING 1027457 is a finished bore single groove sheave designed for use with standard V-belts in HVAC, industrial, and mechanical drive applications. Cast from iron for durability, this sheave features a 1 inch finished bore and a 10.25 inch outside diameter, making it a direct-fit replacement or new-installation component for belt-driven fan and blower assemblies. The groove accepts B-section or A-section V-belts, with a belt pitch diameter of 10.0 inches for 4L or A-type belts and 9.66 inches for 3L-type belts. Licensed tradespeople and mechanical contractors install this sheave on blower shafts, fan drives, and similar rotating equipment.

This sheave is suited for residential and light commercial HVAC blower assemblies, industrial fan drives, and general power-transmission setups where a single V-belt groove is required. The finished bore eliminates the need for additional machining, allowing direct mounting to a 1 inch shaft. The 10.25 inch OD and cast iron construction are common specifications in rooftop units, air handling units, and belt-drive blower decks where precise belt alignment and reliable torque transfer are critical.

Key Features

• Finished bore — mounts directly to a 1 inch shaft with no additional machining
• Single groove accepts 4L, A, or 3L V-belt types
• Belt pitch diameter of 10.0 inches for 4L or A-section belts
• Belt pitch diameter of 9.66 inches for 3L-section belts
• Cast iron construction for long service life in belt-drive applications
• Overall bore length of 1-15/32 inches through bore

Compatibility

Designed as an OEM-style replacement or new-installation sheave for belt-driven blower and fan assemblies requiring a single groove V-belt pulley with a 1 inch finished bore and 10.25 inch outside diameter.

Installation Notes

Installation is typically performed by licensed HVAC technicians or millwrights. Disconnect and lock out all power to the drive system before removing or installing the sheave. Ensure the shaft is clean and free of burrs before sliding the sheave into position, and align the sheave parallel to the mating pulley to prevent premature belt wear. Verify belt tension per the belt manufacturer's guidelines after installation.