Browning 1028463 Single Groove Sheave 3/4 Bore 4.95 Od

Product Description

The BROWNING 1028463 is a finished bore single groove sheave designed for V-belt drive applications in HVAC, industrial, and mechanical systems. Cast from iron for durability, this sheave features a 3/4 inch finished bore and a 4.95 inch outside diameter. The pitch diameter for 4L or A-type belts is 4.2 inches, and the overall length through the bore measures 1-5/32 inches. It is installed by HVAC technicians and mechanical contractors on blower assemblies, fan drives, and belt-driven equipment where precise belt alignment and consistent power transfer are required.

This sheave is suited for residential and light commercial HVAC blower systems, exhaust fans, and general-purpose belt drive assemblies. It accepts standard A-section or 4L V-belts and is sized for applications requiring a 3/4 inch shaft. The finished bore means no additional machining is required before installation, making it a direct drop-in for service and replacement work on belt-driven fan and blower units.

Key Features

• Finished 3/4 inch bore — no additional machining required
• 4.95 inch outside diameter with 4.2 inch pitch diameter for 4L or A-type belts
• Single groove design for single V-belt drive configurations
• Cast iron construction for wear resistance and dimensional stability
• Groove width of 7/8 inch for proper belt seating
• Overall bore length of 1-5/32 inches for secure shaft engagement

Compatibility

Designed as an OEM-style replacement sheave for single V-belt drive systems using 4L or A-section belts on 3/4 inch shafts.

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 drive components. Ensure the sheave is properly aligned with the mating pulley before tensioning the belt to prevent premature wear. Follow applicable OSHA and equipment manufacturer guidelines for belt drive service.