Browning 1028018 Single Groove Sheave 3.15in Od Cast Iron

Product Description

The BROWNING 1028018 is a finished bore single groove sheave designed for use with A-section and 4L-section V-belts in standard belt drive systems. Cast from iron for durability and dimensional stability, this sheave features a 3/4 inch finished bore and a 3.15 inch outer diameter. The pitch diameter for A-belt and 4L-belt applications is 2.4 inches, with a B-section pitch diameter of 2.8 inches. The groove width through the bore measures 1-1/16 inches overall. It is installed by millwrights, HVAC technicians, and mechanical contractors in fan, blower, pump, and general power transmission applications.

This sheave is suited for residential and light commercial HVAC systems, as well as general industrial belt drive assemblies where a single groove A or 4L belt is required. Common applications include supply and return air blower assemblies, condenser fan drives, and pump drives. The finished bore accepts a 3/4 inch shaft directly, eliminating the need for additional machining before installation.

Key Features

• Cast iron construction for dimensional stability and long service life
• Finished 3/4 inch bore — ready for shaft installation without additional machining
• 3.15 inch outer diameter with 2.4 inch pitch diameter for A and 4L belt types
• 2.8 inch pitch diameter for B-section belt applications
• Single groove design for straightforward single-belt drive configurations
• Groove face width of 13/16 inches suits standard V-belt profiles

Compatibility

Designed as an OEM-style replacement sheave for single groove V-belt drive systems using A-section, 4L-section, or B-section belts with a 3/4 inch shaft bore requirement.

Installation Notes

Installation is typically performed by a qualified millwright or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing sheaves. Align the sheave carefully with its mating sheave using a straightedge or laser alignment tool to prevent premature belt and bearing wear. Secure with the appropriate bushing or set screw to the shaft and verify belt tension per the belt manufacturer specifications before returning the system to service.