Precision Marine Propellers

Quality Castings’ Propellers Take You PlacesMarine propellers can be custom-made to fit your specific need

Your boat has propellers to push the craft forwards or backwards. Powered by the engine, the fan-like blade uses force in the water, enabling the boat to freely move at a variety of speeds.

The number of blades typically classifies the name of each propeller. Quality Castings’ manufacturing process is the best in producing propellers, giving our customers freedom to customize their boats. Aside from our customization, our basic types of propellers range from 3-, 4-, and 5-blade models.

 

 

Common Types of Boat Propellers

Depending on which characteristics are most important to you, selecting a common blade-type will provide your boat with smooth and effortless maneuverability. Our precision casting engineers craft only the best components for our customers.

The most popular types of marine propeller blades include:

  • 3-blade
    • High-speed performance
    • Lower in cost
    • Generally made from aluminum alloy, but can be used with other metals
  • 4-blade
    • High-fuel economy
    • Higher in cost compared to 3-blades, but lower in cost compared to 5-blades
    • Made from a stainless steel alloy, but can be used with other metals
    • Strong and durable
  • 5-blade
    • Reduces vibration from the engine
    • Highest in cost
    • Best in performance, capable of handling rough waters 

 Propeller Pitch and Classification

When discussing marine propeller pitch, picture a propeller moving through a piece of wood like a screw. The pitch is determined by how far the propeller would travel with only one rotation. For example, a “higher” pitch propeller will result in more speed for the boat. There are two different types of marine propellers:

Controllable-Pitch

  • High-fuel economy
  • High in cost
  • Crafted from a stainless steel alloy, but can be used with other metals
  • Strong and durable

Fixed-Pitch

  • High-speed performance
  • Low in cost
  • Built from aluminum alloy, but other metals can be used
  • Sturdy in design, compared to controlled pitch

Quality Castings offers standard and custom engineered marine propellers, all crafted with the same quality from our casting technicians. Ranging from food prep to aeration components, our propellers provide the best results, leaving you with undeniable trust in our services. Count on precision propeller casting for all your project needs.

Cavitation vs. Ventilation – What’s the Difference?How to Prevent Propeller Ventilation and Cavitation

Propellers used in marine applications can’t be used anywhere other than underwater. When a propeller sucks in air, either cavitation or ventilation can occur. Ventilation is when propeller blades break the surface of the water and start sucking in air, but cavitation is when air bubbles form on the blades, which in turn suck air into the propellers. Consistently examining your propeller for dented blades, nicks, and rolled tips is essential to preventing these things from happening.

Propeller blades affected by ventilation or cavitation need to be recast, and the professionals at R2 Quality Castings are here to help! Our master precision investment casters can also utilize our parts engineering services if we don’t have the propeller mold or pattern you’re looking for. We also offer many different customization options, including:

  • Static Balancing
  • Clipped Propellers for Draft Tube Applications
  • Standard Setscrew(s)
  • Straight, Tapered, Threaded, and Broached Bores
Contact our custom marine propeller services at R2 Quality Castings today for more information on precision casting.