Browning 1026277 Single Groove Sheave 0.5 in Bore 3.45 in Od

Product Description

The BROWNING 1026277 is a finished bore single groove sheave designed for belt-drive power transmission in HVAC and light industrial applications. Cast from iron for durability, this sheave features a 0.5 inch bore diameter and a 3.45 inch outside diameter. The single groove accepts standard B, 4L, or A section belts with a pitch diameter of 3.2 inches, or 3L section belts with a pitch diameter of 2.86 inches. The overall length through the bore is 15/16 inch and the groove width is 21/32 inch. At 0.95 pounds, it is a compact, ready-to-install component suited for fan and blower assemblies.

This sheave is typically installed on blower shafts, fan drives, and auxiliary equipment in residential and light commercial HVAC systems. It is used wherever a finished bore, single groove belt drive is needed to transfer rotational power from a motor to a blower wheel or fan. The finished bore means no additional machining is required prior to installation. Licensed HVAC technicians and millwrights commonly specify this component when servicing or replacing belt-drive blower assemblies.

Key Features

• Finished bore construction — no machining required before installation
• 0.5 inch bore diameter fits standard shaft sizes in blower and fan assemblies
• Accepts B, 4L, A section belts (3.2 inch pitch diameter) and 3L section belts (2.86 inch pitch diameter)
• Cast iron construction for wear resistance and long service life
• Compact 21/32 inch groove width and 15/16 inch length through bore
• Single groove design for straightforward single-belt drive configurations

Compatibility

Designed as an OEM-style replacement single groove sheave for residential and light commercial belt-drive HVAC blower and fan assemblies accepting B, 4L, A, or 3L section belts on a 0.5 inch bore shaft.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified millwrights. Always disconnect and lock out electrical power to the unit before removing or installing sheaves. Ensure the shaft and bore are clean and free of burrs before seating the sheave, and verify belt alignment and tension after installation per the belt manufacturer guidelines. Consult local mechanical and HVAC codes for any additional requirements.