Esp aw58 Anti Windmill Brake 5/8 Inch Shaft

Product Description

The ESP aw58 is an anti windmill brake designed for use on fan assemblies with a 5/8 inch shaft. This component prevents freewheeling or reverse rotation of fan blades when the unit cycles off, a condition commonly called windmilling. Left unchecked, windmilling causes premature bearing wear and can interfere with system controls. The aw58 is typically installed by HVAC technicians servicing rooftop units, condensers, or cooling tower fan sections where uncontrolled blade rotation is a service concern.

The aw58 is suited for commercial and light commercial fan applications where shaft diameter measures 5/8 inch. It fits inline on the fan shaft and engages automatically when the motor de-energizes. Installers working on rooftop package units and split-system condensers commonly specify this type of brake to reduce service callbacks related to bearing failure and blade damage caused by wind-induced rotation.

Key Features

• Designed for 5/8 inch fan shafts
• Prevents windmilling and reverse blade rotation when system is off
• Helps extend fan bearing service life
• Passive engagement requires no external power or control signal
• Applicable to rooftop units, condensers, and cooling tower fan sections

Compatibility

Designed as an OEM-style anti windmill brake for HVAC fan assemblies equipped with a 5/8 inch diameter shaft.

Installation Notes

Installation is typically performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before working on the fan assembly. The brake mounts to the fan shaft and must be properly seated and secured before returning the unit to service. Consult the equipment manufacturer documentation and applicable local codes before installation.

Technical Specifications

• Shaft Diameter: 5/8 inch
• Application: Anti Windmill Brake

Standard Information

• Brand: ESP
• Manufacturer Part Number: aw58