Dial 6312dial Blower Pulley 8in X 0.75in Keyway Cooler

Product Description

The DIAL 6312dial is a single-groove blower pulley designed for residential evaporative cooler systems. Measuring 8 inches in diameter with a 3/4-inch bore, this zinc pulley transfers rotational power from the motor shaft to the blower assembly. The keyway slot locks the pulley to the shaft, preventing slippage under load and maintaining consistent blower speed. Zinc construction offers corrosion resistance in the humid environment typical of evaporative cooler operation. HVAC technicians and experienced DIYers install this part as a direct replacement for worn or damaged pulleys on swamp cooler blower assemblies.

This pulley is suited for residential evaporative cooler installations where an 8-inch diameter, 3/4-inch bore single-groove pulley is specified. It is commonly used in rooftop and side-draft cooler configurations. The keyway design is a standard fit for blower shafts that use a matching key to secure drive components. Install context typically involves replacing a pulley that shows wear, cracking, or wobble that degrades airflow output and belt life.

Key Features

• 8-inch diameter with 3/4-inch bore for standard blower shaft fitment
• Keyway slot provides positive shaft engagement and prevents rotational slippage
• Single-groove profile compatible with standard V-belt drive configurations
• Zinc construction resists corrosion in high-moisture evaporative cooler environments
• Round profile ensures balanced rotation and reduced vibration during operation

Compatibility

Designed as an OEM-style replacement blower pulley for residential evaporative coolers requiring an 8-inch diameter, 3/4-inch bore, single-groove, keyway-style pulley.

Installation Notes

Installation is typically performed by an HVAC technician or qualified service professional. Disconnect electrical power to the cooler unit before beginning any pulley or belt service. Remove belt tension before pulling the old pulley, and ensure the replacement key is fully seated in the keyway before securing the setscrew or fastener. Inspect the drive belt for wear and replace it if cracking or fraying is present before returning the unit to service.

Technical Specifications

• Diameter: 8 inches
• Bore Size: 0.75 inches
• Material: Zinc
• Color: Silver
• Shape: Round
• Groove Type: Single-groove
• Part Type: Replacement Part

Standard Information

• Brand: DIAL
• Manufacturer Part Number: 6312dial