Dial 6340 Blower Pulley with Keyway 14 Inches X 3/4 Inches

Product Description

The Dial 6340 is a single-groove blower pulley designed for use in residential evaporative coolers. It measures 14 inches in diameter with a 3/4 inch bore and features a keyway slot for a secure, locked fit onto the blower shaft. HVAC technicians and evaporative cooler service professionals rely on this type of pulley to restore proper airflow and belt-driven performance when an original pulley wears out or fails. The keyway design prevents the pulley from spinning freely on the shaft, which reduces slippage, limits vibration, and keeps belt tension consistent over time. In an evaporative cooler system, the blower pulley connects to the motor via a V-belt and drives the blower wheel that pulls air through the wet pads. When the pulley is damaged, undersized, or worn, airflow drops and cooling efficiency suffers. Replacing it with a correctly sized unit like the Dial 6340 restores the designed belt speed and air volume output. At 14 inches in diameter, this is a larger-format pulley suited for coolers that require a specific speed ratio between the motor shaft and blower shaft. The zinc construction gives the pulley good corrosion resistance, which matters in evaporative cooling applications where water and humidity are constant factors. The round, precision-formed shape supports smooth belt tracking and reduces wear on both the belt and bearings. This part is a direct-replacement component for evaporative coolers that originally used a 14 inches by 3/4 inches single-groove blower pulley. Dial Manufacturing has a long history of producing evaporative cooler parts built to exacting standards for residential cooling equipment.

• 14 inches diameter with 3/4 inch bore for correct fit on compatible blower shafts
• Keyway slot locks pulley to shaft, preventing slippage and maintaining consistent belt tension
• Zinc construction resists corrosion in humid evaporative cooling environments

Product Highlights

The Dial 6340 is a zinc, single-groove blower pulley built to restore reliable belt-driven airflow in residential evaporative coolers. Its keyway design and precise 14 inches by 3/4 inch dimensions make it a dependable direct replacement for worn or damaged pulleys.

Product Information

Standard Information

• Brand: DIAL
• Manufacturer Part Number: 6340

Technical Specifications

• Product Type: Blower Pulley
• Diameter: 14 inches
• Bore Size: 3/4 inches
• Material: Zinc
• Color: Silver
• Shape: Round
• Groove Style: Single-Groove
• Feature: Keyway