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Silver five-blade aluminum propeller with central bore

Dayton

Dayton 2MYA3 9 in 5-blade aluminum propeller, 5/16 in bore, CCW

SKU CH-JC5M-WC24F

A 9-inch five-blade aluminum replacement propeller with a 5/16-inch bore, 30-degree pitch and CCW rotation delivers 420 CFM at up to 1,550 RPM

  • typeReplacement
  • Five-blade design moves 420 CFM at zero static pressure
  • 30-degree pitch optimises airflow for 1/100 HP motors
  • Aluminium blades resist corrosion in humid environments
  • 9-inch diameter fits standard replacement housings
  • CCW rotation with two set screws ensures secure mounting

Replacement Propeller for Ceiling Fans

The Dayton 2MYA3 is a 9-inch replacement propeller designed for ceiling-fan motors that require a 5/16-inch bore and counter-clockwise rotation. It suits owners restoring airflow on existing units where the original impeller has worn or broken.

Straightforward two-screw fitting

Installation uses the two supplied set screws that lock onto the motor shaft; no keyway is present so alignment depends on the flat of the shaft. The most common issue is over-tightening the screws, which can strip the soft aluminum hub and leave the propeller loose.

550 RPM maximum speed rating

The propeller is rated for a top speed of 550 RPM and delivers 420 CFM at zero static pressure with a 30-degree blade pitch. Selecting a motor that exceeds this speed will overspeed the blades and risk failure.

Highlights

  • Five-blade design moves 420 CFM at zero static pressure
  • 30-degree pitch optimises airflow for 1/100 HP motors
  • Aluminium blades resist corrosion in humid environments
  • 9-inch diameter fits standard replacement housings
  • CCW rotation with two set screws ensures secure mounting

Specifications

BrandDayton
typeReplacement

Questions about this item

How can I confirm the propeller is moving the rated 420 cfm after installation?

Measure airflow at the discharge with an anemometer; the propeller should deliver 420 cfm at 0.000 in. SP when the motor runs at up to 1,550 RPM.

What comes in the box and what must I supply separately?

The box contains the 9 in aluminum propeller with 5/16 in bore and two set screws; you must provide a compatible 1/100 HP motor with a matching keyway and CCW rotation.

Which propeller specification should I match to my existing fan?

Match the 9 in diameter, 5/16 in bore, 5-blade aluminum construction, 30-degree pitch, CCW rotation, and 1,550 RPM maximum to the fan you are repairing.

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