Browning 1026665 Single Groove Sheave 4.95in Od Cast Iron

Product Description

The BROWNING 1026665 is a finished bore, single groove sheave designed for V-belt drive systems commonly found in HVAC air handling units, blower assemblies, and light industrial equipment. It features a 3/4 inch bore diameter and a 4.95 inch outside diameter, machined from cast iron for durability and dimensional stability. The groove accommodates standard B-section or A-section V-belts, with a belt pitch diameter of 5.1 inches and a 4L or A belt pitch diameter of 4.7 inches. The through-bore length is 1-5/32 inches. This sheave is installed by HVAC technicians and mechanical service professionals performing blower drive replacements or speed adjustments.

This sheave fits typical residential and light commercial HVAC applications where belt-driven blower or fan assemblies are used. It is suited for single-groove V-belt configurations using B, A, or 4L belt types. The finished bore is ready to mount directly to a standard 3/4 inch shaft without additional machining. It is commonly used when servicing air handlers, condenser fan drives, and similar rotating equipment requiring a reliable, balanced drive component.

Key Features

• Finished 3/4 inch bore — mounts directly to standard shaft without boring
• 4.95 inch outside diameter with 5.1 inch belt pitch diameter for B-section belts
• Compatible with 4L or A belt type at 4.7 inch pitch diameter and 3L belt type at 4.36 inch pitch diameter
• Cast iron construction for rigidity and wear resistance in continuous-duty drive applications
• Single groove design for straightforward single-belt drive configurations
• Through-bore length of 1-5/32 inches provides solid shaft engagement

Compatibility

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

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical service professional. Disconnect and lock out power to the unit before removing any belt drive components. Verify shaft diameter and keyway dimensions before mounting, and ensure the sheave is properly aligned with the mating sheave to prevent premature belt wear. Torque all set screws or fasteners per the equipment manufacturer's specifications.