Propeller Replacement Propeller Dia (In.) 34 in Bore Dia (In.) 1 in Number of Blades 6 Pitch (Deg.) 29 Degrees Blade Material Spark Resistant Cast Aluminum Keyway (In.) 1/4 Number of Set Screws 1 Rotation CW Facing Discharge Required Motor HP 1-1/2 3 5 Required HP @ Higher RPM 5 hp Required HP @ Lower RPM 1 1/2 hp RPM Low 1 240 RPM RPM High 1 750 RPM Max RPM 1750 CFM @ 0.000-In. SP 12 995/15 100/18 280 Blade Height (In.) 33 1/4 in Blade Width (In.) 2 3/8 in