Browning 1028398 Single Groove Sheave 5in Od Cast Iron

Product Description

The BROWNING 1028398 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. The sheave features a 3/4 inch finished bore and a 5 inch outer diameter, with a belt pitch diameter of 4.0 inches for Type 4L or A belts and a B pitch diameter of 4.4 inches. The groove width through bore measures 1-5/32 inches. Constructed from cast iron, this sheave delivers reliable durability in fixed-speed belt drive installations. Licensed HVAC technicians and mechanical contractors install this type of component when replacing or configuring blower and fan drive systems.

This sheave is suited for single V-belt drive configurations found in residential and light commercial HVAC air handlers, exhaust fans, and similar rotating equipment. It accepts standard Type 4L or A V-belts, making it compatible with the most common belt sizing used across fan and blower assemblies. The finished bore is ready for installation without additional machining, reducing downtime during service calls or equipment buildouts.

Key Features

• Finished bore at 3/4 inch — no additional machining required
• 5 inch outer diameter with 4.0 inch pitch diameter for Type 4L or A belts
• B pitch diameter of 4.4 inches for precise belt alignment
• Single groove design for straightforward single V-belt drive setups
• Cast iron construction for durability in continuous-duty applications
• Overall bore length of 1-5/32 inches for solid shaft engagement

Compatibility

Designed as an OEM-style replacement sheave for single V-belt drive systems using Type 4L or A belts with a 3/4 inch bore shaft.

Installation Notes

Installation is typically performed by an HVAC technician or mechanical contractor. Disconnect and lock out all electrical power to the equipment before removing or installing the sheave. Ensure the shaft and bore are clean and free of burrs before seating the sheave, and verify belt tension and alignment according to the equipment manufacturer's specifications after installation. Follow applicable OSHA guarding requirements for exposed rotating components.