Browning 1026988 Single Groove Sheave 6.4 in Od Cast Iron

Product Description

The BROWNING 1026988 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Manufactured from cast iron, this sheave features a 5/8 inch bore diameter and a 6.4 inch outside diameter, making it a compact, durable option for standard A-section and 4L-section belt configurations. The groove profile is precision-machined to maintain proper belt tracking and minimize slippage under load. Licensed HVAC technicians, millwrights, and mechanical contractors routinely use sheaves of this type when building or servicing blower drive assemblies, fan systems, and auxiliary equipment drives.

This sheave is suited for residential and light commercial applications where a single-groove V-belt drive is specified. It is compatible with 4L and A-section belts at a 6.0 inch pitch diameter, as well as 3L-section belts at a 5.66 inch pitch diameter. Typical installation scenarios include supply fan blower drives, condenser fan assemblies, and general-purpose belt-driven equipment where a finished bore eliminates the need for additional machining. The 3/4 inch groove width and cast iron construction provide reliable performance in belt-driven systems that experience moderate to high cycle loads.

Key Features

• Finished bore at 5/8 inch — ready to install without additional machining
• 6.4 inch outside diameter with a 6.0 inch pitch diameter for 4L and A-section belts
• 5.66 inch pitch diameter for 3L-section belts
• Single groove design for straightforward single-belt drive configurations
• Cast iron construction for durability and dimensional stability under load
• 3/4 inch groove width suits standard V-belt profiles

Compatibility

Designed as an OEM-style replacement or direct-application sheave for single-groove V-belt drive systems using 4L, A-section, or 3L-section belts with a 5/8 inch shaft bore.

Installation Notes

Installation should be performed by a qualified HVAC technician, millwright, or mechanical contractor. De-energize and lock out the drive system before removing or installing any sheave. Inspect the mating shaft for proper diameter, keyway condition, and surface finish before pressing the sheave into position. Verify belt tension and alignment after installation per the belt and drive manufacturer guidelines to prevent premature wear.