Dial 6307 Blower Pulley with Keyway 7 Inches by 5/8 Inches

Product Description

The Dial 6307 is a single-groove blower pulley designed for residential evaporative coolers. It measures 7 inches in diameter with a 5/8 inches bore and features a keyway for a secure, locked fit on the blower shaft. This pulley is cast from zinc, giving it a solid, corrosion-resistant build that holds up in the hot and dusty conditions common to evaporative cooler installations. The silver finish is consistent with standard blower pulley construction used across many cooler brands and models. HVAC technicians and service professionals rely on pulleys like the Dial 6307 when performing routine maintenance, seasonal startups, or emergency repairs on swamp cooler systems. The keyway slot prevents the pulley from spinning independently on the shaft, which eliminates slippage and keeps belt tension consistent throughout the cooling season. Consistent belt tension means the blower wheel spins at the correct speed, delivering proper airflow across the evaporative media pads. When a blower pulley cracks, chips, or wears at the bore, airflow drops and belt wear accelerates. Replacing the pulley with a correctly sized unit like the Dial 6307 restores original system performance without the need for custom machining or adapters. Evaporative cooler blower pulleys work in conjunction with a motor pulley and a v-belt. The 7 inches diameter on this pulley affects the final blower speed ratio, so selecting the correct diameter during replacement is important for maintaining rated CFM output. This part fits a wide range of residential evaporative cooler units that use a 5/8 inches bore shaft configuration. Dial Manufacturing has supplied evaporative cooler components to the HVAC trade for decades, and the 6307 reflects their focus on dimensional accuracy and material durability for field-ready replacement parts.

• 7 inches diameter, 5/8 inches bore single-groove blower pulley for residential evaporative coolers
• Keyway design locks pulley to the blower shaft, preventing slippage and maintaining consistent belt tension
• Zinc construction provides strength and corrosion resistance in outdoor and high-temperature cooler environments

Product Highlights

The Dial 6307 is a direct-replacement blower pulley built to restore proper airflow and reliable belt drive operation in residential evaporative cooler systems. Its keyway bore and zinc construction make it a durable, field-ready solution for HVAC service professionals.

Product Information

Standard Information

• Brand: DIAL
• Manufacturer Part Number: 6307

Technical Specifications

• Diameter: 7 inches
• Bore Size: 5/8 inches
• Color: Silver
• Material: Zinc
• Product Type: Blower Pulley
• Shape: Round
• Drive Type: Single Groove V-Belt
• Feature: Keyway