Dial 6336 Blower Pulley 12x3/4 Inches Evaporative Cooler

Product Description

The DIAL 6336 is a single-groove blower pulley designed for residential evaporative coolers. Measuring 12 inches in diameter with a 3/4-inch bore, it transfers power from the motor shaft to the blower assembly, driving airflow through the cooler media. The keyway design locks the pulley to the shaft, preventing slippage under load and maintaining consistent blower speed. This is a direct-replacement component installed by HVAC technicians and experienced service pros performing evaporative cooler maintenance or repair.

This pulley fits into the drive system of residential evaporative coolers where a 12-inch diameter, 3/4-inch bore single-groove pulley is specified. It is suited for seasonal maintenance service, worn-part replacement, or belt-drive system restoration on rooftop and side-draft swamp cooler units. Installers should verify bore size, groove profile, and belt width before installation to confirm fitment with the existing motor pulley and belt.

Key Features

• 12-inch diameter pulley for residential evaporative cooler blower assemblies
• 3/4-inch bore with keyway for secure shaft engagement and slip prevention
• Single-groove design compatible with standard V-belt drive configurations
• Direct-replacement fit reduces downtime during seasonal cooler service

Compatibility

Designed as an OEM-style replacement for residential evaporative cooler blower drive systems requiring a 12-inch diameter, 3/4-inch bore single-groove pulley.

Installation Notes

Installation is typically performed by an HVAC technician or qualified service professional. Disconnect and lock out power to the evaporative cooler before removing the belt or pulley. Align the replacement pulley with the motor pulley to prevent premature belt wear, and torque the setscrew to the shaft keyway per the cooler manufacturer's service documentation. Inspect the drive belt for wear and replace it if cracking or glazing is present before returning the unit to service.

Technical Specifications

• Diameter: 12 inches
• Bore Size: 3/4 inches
• Groove Type: Single groove
• Drive Type: V-belt
• Application: Evaporative cooler blower assembly

Standard Information

• Brand: DIAL
• Manufacturer Part Number: 6336