Browning 1026525 Single Groove Sheave 0.5 in Bore Cast Iron

Product Description

The BROWNING 1026525 is a finished bore single groove sheave designed for belt-drive applications in HVAC and light industrial systems. It features a 0.5 inch bore diameter and a 4.45 inch outer diameter, with a groove width of 0.75 inches. The sheave is cast iron construction, providing durability and dimensional stability under continuous load. The belt pitch B diameter is 4.6 inches. Pitch diameter for 4L or A belt types is 4.2 inches, and for 3L belt types it is 3.86 inches. Overall length through bore is 1-5/32 inches. This part weighs 1.75 pounds and is sold as a single unit.

This sheave is suited for use in residential and light commercial HVAC equipment, including blower assemblies, air handlers, and fan drives that rely on V-belt power transmission. It accepts standard 3L, 4L, and A belt profiles, making it a common replacement component in belt-driven blower systems. Installation is typically performed by HVAC technicians or mechanical service professionals during blower motor replacement or drive system maintenance.

Key Features

• Finished bore at 0.5 inches — ready for immediate installation without additional machining
• Single groove design compatible with 3L, 4L, and A belt profiles
• Cast iron construction for rigidity and wear resistance under continuous belt load
• 4.45 inch OD with 4.6 inch belt pitch B diameter for accurate drive ratio selection
• Groove width of 0.75 inches suits standard V-belt widths
• Compact profile at 1-5/32 inches overall length through bore

Compatibility

Designed as an OEM-style replacement single groove sheave for residential and light commercial belt-driven blower and fan assemblies using 3L, 4L, or A profile V-belts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical service professional. Always disconnect and lock out power to the equipment before removing or installing drive components. Verify shaft diameter matches the 0.5 inch finished bore before installation, and ensure the sheave is properly aligned with the mating pulley using a straightedge to minimize belt wear and vibration. Secure the set screw to the manufacturer's standard practice after confirming alignment.