Browning 1028208 Single Groove Sheave 5/8 Bore 3.95 Od

Product Description

The BROWNING 1028208 is a finished bore single groove sheave designed for use with A-section and 4L-section V-belts in belt-drive power transmission systems. It features a 5/8-inch bore diameter and a 3.95-inch outside diameter, with a belt pitch diameter of 3.2 inches and an overall bore length of 1-5/32 inches. The groove width measures 7/8 inches. Cast iron construction provides durability and dimensional stability under continuous rotational loads. This sheave is installed by HVAC technicians, millwrights, and mechanical contractors on fan, blower, and motor shaft assemblies where a finished bore eliminates the need for additional machining.

This sheave is suited for residential and light commercial belt-drive applications including air handlers, furnace blowers, exhaust fans, and similar equipment driven by A-belt or 4L-belt configurations. The finished bore is pre-sized at 5/8 inches and is ready for direct shaft installation without modification. It is a common replacement component when a worn or damaged single-groove sheave needs to be swapped on an existing drive system.

Key Features

• Finished bore at 5/8 inches — no machining required for direct shaft fit
• Single groove design compatible with A-section and 4L-section V-belts
• 3.2-inch belt pitch diameter for accurate drive ratio calculations
• Cast iron construction for wear resistance and dimensional stability
• 7/8-inch groove width matches standard A and 4L belt profiles
• Overall bore length of 1-5/32 inches provides adequate shaft engagement

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-drive systems using A-section or 4L-section V-belts with a 5/8-inch shaft diameter.

Installation Notes

Installation should be performed by a qualified technician. Disconnect and lock out all power to the drive system before removing or installing the sheave. A hub puller may be required to remove the existing sheave from the shaft. Verify shaft diameter and belt section compatibility before installation, and align sheave grooves within manufacturer tolerances to prevent premature belt wear.