TBWOODSTB4J12 TB-4J12 Sheave Hub 1/2 Inch Bore

Product Description

The TBWOODSTB4J12 TB-4J12 is a sheave hub designed for use with V-belt drive assemblies in mechanical and HVAC power transmission applications. The hub features a 1/2 inch bore, making it compatible with standard 1/2 inch shafting commonly found in blower and fan drive setups. Sheave hubs of this type are typically installed by HVAC technicians and mechanical service professionals when assembling or replacing belt-drive components on air handling equipment. This part serves as the mounting interface between the drive shaft and the sheave, transmitting rotational force to the belt.

This hub is suited for residential and light commercial HVAC systems where V-belt drive configurations are used, including belt-drive blower assemblies, fan systems, and similar mechanical drive setups. The 1/2 inch bore size fits standard motor and blower shafts of the same diameter. Installation is performed when replacing worn or damaged drive components during routine maintenance or equipment repair.

Key Features

• 1/2 inch bore for compatibility with standard 1/2 inch drive shafts
• Designed for use with J-series sheave and V-belt drive assemblies
• Compact hub profile suited for blower and fan drive applications
• OEM-style replacement fitment for belt-drive HVAC and mechanical systems

Compatibility

Designed as an OEM-style replacement hub for J-series sheave assemblies used in V-belt drive applications on residential and light commercial HVAC blower and fan systems.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical tradesperson. Disconnect and lock out all electrical power to the equipment before servicing any belt-drive components. Ensure the shaft and bore are clean and free of burrs before seating the hub, and verify set screw engagement is secure before restoring power. Refer to equipment manufacturer documentation for proper belt tensioning procedures.

Technical Specifications

• Bore Size: 1/2 inch
• Series: J

Standard Information

• Brand: TBWOODSTB4J12
• Manufacturer Part Number: TB-4J12