121-399

This high-quality 1-groove sheave is a critical component for belt-driven blower systems, designed to ensure efficient power transmission between the motor and the fan. Engineered for durability, this pulley helps maintain consistent airflow and reduces vibration within your HVAC system. It is an essential replacement part for residential and commercial furnaces, air handlers, and ventilation units when the existing sheave becomes worn, cracked, or misaligned. By facilitating smooth rotation, this precision-machined component helps extend the life of blower belts and bearings, ensuring your climate control system operates quietly and effectively.
Type: Blower Pulley / Sheave
Size: Standard HVAC Bore Size
Dimensions: Not specified × Not specified × Not specified
Application: Used in belt-driven blower assemblies, furnace motors, and air handling units for residential and commercial heating and cooling systems.
Specifications: Single groove design; .875 inch (7/8") bore diameter for shaft mounting.