Browning 1028109 Single Groove Sheave 0.875 in Bore

Product Description

The BROWNING 1028109 is a finished bore single groove sheave designed for use in belt-drive power transmission systems. It features a 0.875 inch bore diameter and a 3.55 inch outer diameter, with a belt pitch diameter of 2.8 inches for 4L or A-type belts. Constructed from cast iron, this sheave provides the rigidity and wear resistance required in demanding HVAC blower assemblies, fan systems, and general industrial drive applications. Installation is typically performed by HVAC technicians or mechanical trades working on belt-driven equipment.

This sheave is suited for residential and light commercial belt-drive applications where a single groove configuration is required. Its finished bore is machined to 0.875 inches, ready for direct shaft mounting without additional boring. The 4L and A-belt compatibility makes it a practical fit for common blower and fan drive setups found in air handling units and similar equipment.

Key Features

• Finished bore machined to 0.875 inches — no additional boring required
• Single groove design compatible with 4L and A-type V-belts
• Cast iron construction for rigidity and long service life
• 3.55 inch outer diameter with 2.8 inch belt pitch diameter
• Overall bore length of 1-5/32 inches for secure shaft engagement

Compatibility

Designed as an OEM-style replacement or new-installation single groove sheave for belt-drive systems using 4L or A-type V-belts with a shaft diameter of 0.875 inches.

Installation Notes

Installation is performed by HVAC technicians or mechanical trades familiar with belt-drive power transmission. Disconnect and lock out all power to the unit before removing or installing any sheave. Verify shaft diameter and belt type before mounting. Secure the sheave to the shaft using the appropriate key and setscrew arrangement, and align the sheave with the mating pulley before tensioning the belt to manufacturer specifications.