Browning 1028158 Single Groove Sheave 3.75 in Od Cast Iron

Product Description

The BROWNING 1028158 is a finished bore single groove sheave designed for use in V-belt drive systems. It features a 3.75-inch outer diameter, a 0.75-inch finished bore, and a 0.875-inch face width. The sheave is cast from iron for durability under continuous rotational load. With a B-section belt pitch diameter of 3.4 inches and a 4L or A-section pitch diameter of 3.0 inches, this sheave is ready for direct installation without additional machining. It is a standard industrial component installed by HVAC technicians, millwrights, and mechanical contractors on belt-driven fan and blower assemblies.

This sheave is commonly used in residential and light commercial HVAC applications where a single V-belt drives a blower wheel, condenser fan, or ventilation fan. The finished bore design means the part ships ready to mount on a 0.75-inch shaft with a standard setscrew or bushing arrangement. Its compact 3.75-inch OD makes it well suited for tight equipment cabinets and air handler assemblies where space around the drive is limited.

Key Features

• Finished 0.75-inch bore — no machining required prior to installation
• 3.75-inch outer diameter with 3.4-inch B-section pitch diameter
• Compatible with 4L and A-section V-belts at a 3.0-inch pitch diameter
• 0.875-inch face width accommodates standard single-belt drive configurations
• Cast iron construction for strength and wear resistance under belt tension loads
• Overall length through bore of approximately 1.156 inches

Compatibility

Designed as an OEM-style replacement single groove sheave for residential and light commercial V-belt drive systems using B-section, 4L, or A-section belts on 0.75-inch shafts.

Installation Notes

Installation is typically performed by HVAC technicians or mechanical contractors. Disconnect and lock out all electrical power to the unit before removing or installing any drive components. Verify shaft diameter and belt section before mounting. After installation, check belt tension and alignment per the equipment manufacturer specifications before returning the system to service.