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18 inch four-blade aluminum propeller 3/4 inch bore clockwise rotation

Dayton

Dayton 3GRE4 18 in 3/4 Bore 3410 CFM Propeller

SKU CH-3FWQ-WQ86Z

An 18-inch four-blade replacement propeller with a 3/4-inch bore and 23-degree pitch delivers 3410 CFM at zero static pressure

  • typeReplacement
  • 18-inch diameter moves 3410 CFM at free air
  • 3/4-inch bore with 3/16-inch keyway fits 1/3 HP motor
  • Spark-resistant cast aluminium blades suit hazardous locations
  • Clockwise rotation delivers 2920 CFM at .125 in SP
  • Four-blade 23-degree pitch maintains 1980 CFM at .375 in SP

Replacement Propeller for 1/3 HP Motors

This 18-inch propeller is a direct replacement component designed for compatible ceiling fan motors rated at one-third horsepower. It delivers 3410 CFM at zero static pressure and maintains 2920 CFM at .125 inches SP. The clockwise rotation facing discharge suits specific motor configurations.

3/4-Inch Bore with 3/16-Inch Keyway

The propeller mounts on a 3/4-inch diameter shaft and uses a 3/16-inch wide by 3/32-inch deep keyway for positive drive engagement. Two set screws secure the hub to the shaft. Verify both bore diameter and keyway dimensions against the motor shaft before ordering.

Simple Hub Installation with Alignment Risk

Installation requires sliding the hub onto the keyed shaft, inserting the key, and tightening both set screws against the flat and keyway. The most common issue is misaligned key seating, which causes vibration at 1725 RPM maximum speed. Ensure the key is fully seated before final tightening.

Highlights

  • 18-inch diameter moves 3410 CFM at free air
  • 3/4-inch bore with 3/16-inch keyway fits 1/3 HP motor
  • Spark-resistant cast aluminium blades suit hazardous locations
  • Clockwise rotation delivers 2920 CFM at .125 in SP
  • Four-blade 23-degree pitch maintains 1980 CFM at .375 in SP

Specifications

BrandDAYTON
typeReplacement

Questions about this item

What does the 3410 CFM rating mean when the propeller is installed on a motor?

At zero static pressure the propeller moves 3410 cubic feet of air per minute; at 0.125 in SP it drops to 2920 CFM, at 0.250 in SP to 2410 CFM, and at 0.375 in SP to 1980 CFM.

What shaft size and keyway does the 3/4 in bore propeller accept?

The bore is 3/4 in with a 3/16 in wide by 3/32 in deep keyway and uses two set screws for locking.

What motor horsepower and maximum speed are required for this 18 in propeller?

The propeller requires a 1/3 HP motor and must not exceed 1725 RPM.

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