Browning 1027523 Single Groove Sheave 1in Bore 11.25in Od

Product Description

The BROWNING 1027523 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and commercial equipment applications. Machined from cast iron, this sheave features a 1 inch finished bore and an 11.25 inch outer diameter, making it a direct-mount component for blower and fan shaft assemblies. The belt pitch diameter measures 11.4 inches, with a 3/4 inch groove width suited to standard B-section and A-section V-belts. The overall length through the bore is 1-15/32 inches. Licensed HVAC technicians, millwrights, and mechanical contractors typically install this type of sheave during blower motor upgrades, belt drive replacements, or system retrofits.

This sheave is appropriate for use on belt-driven blower assemblies found in residential and light commercial air handling units, rooftop units, and fan coil systems. It accommodates Type B or A V-belts with an 11.0 inch pitch diameter, as well as 3L-section belts at a 10.66 inch pitch diameter. The finished bore eliminates on-site boring, simplifying installation on standard 1 inch motor or blower shafts. Cast iron construction provides the mass and rigidity needed for consistent belt tension and reduced vibration in continuous-duty applications.

Key Features

• Finished 1 inch bore — ready to mount on standard motor or blower shafts without additional machining
• 11.25 inch outer diameter with 11.4 inch belt pitch diameter for accurate drive ratio calculations
• Compatible with Type B/A V-belts (11.0 inch pitch diameter) and 3L-section belts (10.66 inch pitch diameter)
• Single groove design for straightforward single-belt drive configurations
• Cast iron construction for durability and vibration damping in continuous-duty service
• 3/4 inch groove width suits standard B and A section V-belt profiles

Compatibility

Designed as an OEM-style replacement or upgrade sheave for single V-belt drive systems using B-section, A-section, or 3L-section belts on 1 inch bore shafts. Specific equipment compatibility should be verified against drive system engineering data before installation.

Installation Notes

Installation should be performed by a qualified HVAC technician or millwright. Disconnect and lock out all electrical power to the equipment before removing the existing sheave or belt. Secure the sheave to the shaft using a properly sized key and set screw, and verify shaft and sheave alignment with a straightedge or laser alignment tool before reinstalling the belt. Confirm belt tension according to the belt manufacturer specifications to prevent premature wear or slippage.