Boat Propellers: Terminology
Sante Marine Propeller has everything you need regarding boat propellers! We don’t just sell propellers, we repair & re-pitch them as well as providing skeg & cavitation plate repair and shaft straightening. We are here to make sure you spend less time out of the water and more time on it having fun!
For your reference, here are some of the general terms and also a few technical ones in the propeller business.
What it means...
The diameter of the imaginary circle scribed by the blade tips as the propeller rotates.
The distance from the axis of rotation to the blade tip. The radius multiplied by two is equal to the diameter.
Pressure Side, Pitch Side. Aft side of the blade surface facing the stern.
Suction Side. Forward side of the blade surface facing the bow.
The edge of the propeller blade adjacent to the forward end of the hub. When viewing the propeller from astern, this edge is furthest away. The leading edge leads into the flow when providing forward thrust
The edge of the propeller adjacent to the aft end of the hub. When viewing the propeller from astern, this edge is closest The trailing edge retreats from the flow when providing forward thrust.
Equal to the number of blades on the propeller.
Maximum reach of the blade from the center of the hub. Separates the leading and trailing edges.
Solid cylinder located at the center of the propeller. Bored to accommodate the engine shaft. Hub shapes include cylindrical, conical, radius & barreled.