Lennox 25W59 Pulley 1" Bore 4.25" Outer Diameter

The Lennox 25W59 Pulley is a power transmission component designed to transfer rotational motion between connected drive elements within compatible equipment. Featuring a 1-inch bore and a 4.25-inch outer diameter, it is frequently installed in HVAC systems such as air handlers, ventilation units and commercial heating and cooling equipment where belt-driven assemblies are utilized. The support regulates the movement of belts and related mechanical components, supporting proper speed and torque transfer. Its role within the system is to assist blower and fan operation, supporting consistent airflow and equipment performance.