Browning 1028422 Single Groove Sheave 1 in Bore 4-3/4 in Od

Product Description

The BROWNING 1028422 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Manufactured from cast iron, this sheave features a 1 inch finished bore and a 4-3/4 inch outside diameter. The belt pitch diameter measures 4.4 inches, and the pitch diameter for 4L or A-type belts is 4.0 inches. The through-bore length is 1-5/32 inches. Licensed HVAC technicians, millwrights, and mechanical contractors install this component as part of blower drive assemblies, fan systems, and belt-driven equipment requiring precise pulley alignment and reliable torque transfer.

This sheave is suited for single-groove V-belt drive configurations in residential and light commercial HVAC blower assemblies, exhaust fans, and general-purpose power transmission setups. The finished bore is ready for direct shaft installation without additional machining. The cast iron construction provides durability under continuous belt load and is appropriate for indoor mechanical equipment rooms and air handling unit installations where a standard A or 4L belt profile is used.

Key Features

• Finished bore eliminates machining — ready for direct shaft installation at 1 inch bore diameter
• Single groove design accepts standard A-type or 4L V-belts
• 4.4 inch belt pitch diameter with 4.0 inch pitch diameter for 4L or A belt type
• Cast iron construction for durability under continuous belt tension and load cycling
• 4-3/4 inch outside diameter suits common blower and fan drive configurations
• Through-bore length of 1-5/32 inches for secure shaft engagement

Compatibility

Designed as an OEM-style replacement or new-installation sheave for single-groove V-belt drive systems using A-type or 4L belts with a 1 inch shaft bore requirement.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the equipment before removing or installing any drive components. Ensure the shaft is clean and free of burrs before pressing the sheave into position, and verify pulley alignment with a straightedge before tensioning the belt. Proper belt tension should be confirmed per the belt manufacturer guidelines to prevent premature wear.