Browning 1026434 Single Groove Sheave 3.95 in Od Cast Iron

Product Description

The BROWNING 1026434 is a finished bore single groove sheave designed for use in belt-driven systems common to HVAC, industrial, and mechanical applications. The sheave features a 7/8 inch bore diameter and a 3.95 inch outer diameter, with a cast iron construction that provides durability under continuous load. The groove is sized to accept standard 4L/A or 3L type V-belts, making it a practical replacement or new-installation component for blower and fan drive assemblies. Licensed HVAC and mechanical technicians install this type of sheave when adjusting fan speed or replacing worn drive components on air handling and ventilation equipment.

This single groove sheave is suited for residential and light commercial HVAC blower assemblies, exhaust fans, and similar belt-driven fan applications where a standard 7/8 inch finished bore fits the motor or driven shaft. The finished bore eliminates the need for additional machining before installation. Typical applications include belt-driven supply and return air blower systems found in furnaces, air handlers, and rooftop units.

Key Features

• 7/8 inch finished bore diameter — ready to install without additional machining
• 3.95 inch outer diameter with a 3.7 inch pitch diameter for 4L/A belt type
• 3.36 inch pitch diameter for 3L belt type
• Single groove profile accepts standard V-belts
• Cast iron construction for wear resistance and dimensional stability
• Overall length through bore of 1-5/32 inches

Compatibility

Designed as an OEM-style replacement single groove sheave for belt-driven blower and fan drive systems using 4L, A, or 3L type V-belts with a 7/8 inch shaft bore requirement.

Installation Notes

Installation of this sheave is typically performed by a licensed HVAC technician or millwright. Disconnect and lock out all electrical power to the unit before removing or installing any drive components. Ensure the shaft is clean and free of burrs before sliding the sheave into position, and verify proper belt tension and alignment after installation to prevent premature wear. Follow applicable OSHA and local mechanical codes when working on belt and pulley drive systems.