Browning 1028497 Single Groove Sheave 1-1/8 Bore 4.95 Od

Product Description

The BROWNING 1028497 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. It features a 1-1/8 inch bore diameter and a 4.95 inch outside diameter, with a 4.2 inch pitch diameter for 4L or A-type belts and a 4.6 inch B-series belt pitch diameter. The sheave body is cast iron, providing durability and dimensional stability under continuous belt load. The finished bore is ready for shaft installation without additional machining. At 1.95 pounds, it is a compact, single-groove drive component suited for light-to-medium duty fan and blower drive setups.

This sheave is commonly installed on blower shafts, fan drive assemblies, and motor output shafts in residential and light commercial HVAC systems. It is suited for applications using 4L, A-type, or B-type V-belts where a single-groove, finished-bore pulley is required. The 1-1/8 inch bore fits standard fractional motor and blower shaft sizes frequently encountered in split-system air handlers, package units, and ventilation equipment. Typical installers include HVAC technicians and mechanical contractors performing belt-drive replacements or system upgrades.

Key Features

• Finished bore at 1-1/8 inches — ready for direct shaft installation with no additional boring required
• 4.95 inch outside diameter with 4.2 inch pitch diameter for 4L and A-type belts
• 4.6 inch pitch diameter compatible with B-type belt profiles
• Cast iron construction for rigidity and wear resistance under belt tension
• Single groove design for straightforward single-belt drive configurations
• Overall length through bore of 1-5/32 inches for compact shaft engagement

Compatibility

Designed as an OEM-style replacement single groove sheave for V-belt drive systems using 4L, A-type, or B-type belts with a 1-1/8 inch shaft bore.

Installation Notes

Installation is performed by HVAC technicians or mechanical contractors. Disconnect and lock out all 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 belt alignment and tension after installation per the belt manufacturer's guidelines. Refer to applicable mechanical codes and equipment service manuals for drive system specifications.