Browning 1028299 Single Groove Sheave 1in Bore 4-1/4in Od

Product Description

The BROWNING 1028299 is a finished bore single groove sheave designed for use with B-section and A-section V-belts in belt-drive blower and fan applications. The sheave features a 1 inch finished bore and a 4-1/4 inch outer diameter, with a pitch diameter of 3.5 inches for 4L or A-type belts. Constructed from cast iron, it provides the durability and mass required for sustained rotational loads in HVAC air-handling systems. The groove width measures 7/8 inch, and the overall length through the bore is 1-5/32 inches. Licensed HVAC technicians and mechanical contractors typically install this component during blower motor setups or belt-drive replacements.

This sheave is suited for residential and light commercial belt-drive blower assemblies where a single V-belt drive is specified. It is commonly installed on air handler units, furnace blowers, and exhaust fan drives that call for a standard A or 4L belt profile. The finished bore accepts a 1 inch shaft directly, eliminating the need for additional boring or bushing in most standard installations.

Key Features

• Finished 1 inch bore for direct shaft mounting without additional machining
• 4-1/4 inch outer diameter with a 3.5 inch pitch diameter for 4L and A-section belts
• Single groove design for straightforward single belt-drive configurations
• Cast iron construction for durability under continuous rotational loads
• 7/8 inch groove width matched to standard A and 4L belt profiles
• Overall length through bore of 1-5/32 inches for compact axial footprint

Compatibility

Designed as a standard replacement single groove sheave for residential and light commercial belt-drive blower and fan systems using A-section or 4L V-belts on 1 inch diameter shafts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all 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 to prevent premature belt wear. Follow applicable OSHA machine guarding requirements for belt-drive systems.