Dial 6311 Blower Pulley 8 X 5/8 Inches Evaporative Cooler

Product Description

The DIAL 6311 is a single-groove blower pulley designed for residential evaporative cooler systems. Measuring 8 inches in diameter with a 5/8-inch bore, it includes a keyway for a secure, slip-resistant fit on the blower shaft. Cast from zinc, this round pulley delivers consistent power transfer from the motor to the blower wheel, maintaining steady airflow throughout the cooling season. Installation is straightforward and is typically handled by HVAC technicians or experienced evaporative cooler service pros during routine maintenance or component replacement.

This pulley is suited for residential evaporative cooler applications where a standard 8-inch single-groove blower pulley with a 5/8-inch bore is required. It is commonly installed during seasonal startups, blower assembly rebuilds, or when a worn or damaged pulley is causing belt slippage, noise, or reduced airflow performance. The silver zinc construction resists corrosion in the humid operating environment typical of swamp cooler service.

Key Features

• 8-inch diameter single-groove design for standard V-belt drive systems
• 5/8-inch bore with keyway for secure shaft engagement and slip prevention
• Zinc construction offers corrosion resistance in high-humidity evaporative cooler environments
• Round profile ensures balanced rotation and smooth belt operation
• Direct-replacement form factor simplifies swap-out during service calls

Compatibility

Designed as an OEM-style replacement blower pulley for residential evaporative cooler units requiring an 8-inch single-groove pulley with a 5/8-inch keyed bore.

Installation Notes

Installation is performed by a qualified HVAC technician or evaporative cooler service professional. Disconnect and lock out power to the unit before removing the blower assembly or handling drive components. Ensure the keyway and set screw are properly seated and torqued per the equipment manufacturer's specifications before reinstalling the belt. Inspect the belt for wear and verify proper tension after installation to prevent premature pulley or belt failure.

Technical Specifications

• Diameter: 8 inches
• Bore Size: 5/8 inches
• Material: Zinc
• Color: Silver
• Shape: Round
• Groove Type: Single Groove

Standard Information

• Brand: DIAL
• Manufacturer Part Number: 6311