Propeller Casting and Fabrication Services

 

Industrial Propeller Manufacturing

Cast PropellersR2 Quality Castings, the top precision investment casting company and rapid prototype developers, have decades of experience in producing high quality, thoroughly dependable cast propellers for a wide variety of industrial and production applications. Our excellent precision investment casting and propeller casting capabilities enable our professional product casters to produce many different styles of propeller, including:

1.  3-Blade MP Style

The 3-blade MP style propeller is a multi-purpose propeller designed for mixing, blending, agitating, and liquid movement for many different applications. Multipurpose 3-blade propellers have semi elliptical blades. Full or clipped blade propeller tip designs are available for these multipurpose 3-blade propellers.  The full blade tip is the best for open liquid applications and the clipped tip is for improved duct efficiency. This blade style is offered with a three-blade or a four-blade design.

2.  2-Blade Weedless

Commonly used in aeration and mixing equipment, such as water or wastewater applications, this blade is designed for dealing with solid and/or stringy materials. The 2-blade weedless propeller is offered with a “full” blade tip for open liquid applications or a clipped tip design for duct applications. Non-fouling propeller blade design prevents buildup on the propeller, keeping it in pristine condition.  Preventing propeller weed buildup is important in keeping equipment functioning properly.  

3.  3-Blade Weedless

This blade is commonly used for wastewater applications and for aeration or mixing equipment and is offered with a “full” blade for open liquid applications and a clipped blade design for improved efficiency in ductwork and drainage systems. Non-fouling blade design prevents buildup of unwanted materials on the propeller.

Weedless propellers are designed to work efficiently where stringy material is found.  If a propeller becomes snagged with weeds, it will wear out and won’t function properly.

Custom Propeller Design Services with Additional Options

Propeller CastingIn addition to our propeller casting and product finishing and polishing capabilities, R2 Quality Castings possesses a wide selection of propeller molds and patterns well suited for many different applications. Our master precision investment casters can also utilize our parts design and manufacturing 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

Precision Investment Cast Propeller Material and Finishing Options

Propeller Fabrication Materials

  • 300 & 400 Series Stainless Steel
  • Precipitation Hardening Steels
  • Nibral
  • Bronze
  • Hastelloy
  • Alloy 20
  • Aluminum
  • Other Materials Available Upon Request

Propeller Finishing Options

  • 36# Grit
  • Roto-dull
  • Dairy Buff (#4 Finish)
  • Mirror Buff (#8 Finish)

Custom Marine Propeller Manufacturing

Types of Propellers: How to Classify Propellers and Differences between Types

Simply put, a marine propeller is a fan moving water or liquid instead of air. On a boat or ship, it propels it forward using the power generated by the engine. The power is converted from a rotational motion to generate a thrust which creates momentum in the water, resulting in a constant push forward.

Propellers are classified depending on different factors, such as the number of blades or the pitch of the blades. 

Classification by the Number of Blades

Propellers vary in blade counts from three to five and even more. The most common number of blades attached to a propeller are three, four, or five.

3 Blade Propeller

Characteristics include:

  • Low manufacturing cost compared to propellers with more blades
  • Normally made from aluminum alloy, but can be made from a variety of metals
  • Great high-speed performance
  • Acceleration is more efficient than other types
  • Low-speed handling is difficult

4 Blade Propeller

Characteristics include:

  • Higher manufacturing cost compared to 3-blade propellers
  • Normally made from stainless steel alloys, but can be made from a variety of metals
  • Strength and durability is high
  • Good to great low-speed handling and performance
  • High fuel economy

5 Blade Propeller

Characteristics include:

  • Highest manufacturing cost compared to other propellers
  • Minimal vibration, resulting in more efficiency, performance, and durability
  • Better holding in rough waters

Custom Designed Clipped PropellersClassification by the Pitch of the Blades

The pitch of a propeller is the displacement the propeller makes per revolution (360˚). Classifying a propeller by pitch is defined below:

Fixed-Pitch Propeller

Characteristics include:

  • Blades are permanently attached to the hub
  • Made through precision casting
  • Robust, reliable because the design doesn’t incorporate any mechanical or hydraulic components such as does the controlled pitch propeller (CPP)
  • Manufacturing and installation costs are lower than CPP
  • Normally made from aluminum alloy, but can be made from a variety of metals
  • Great high-speed performance
  • Acceleration is more efficient than other types
  • Low-speed handling is difficult

Controllable-Pitch Propeller

Characteristics include:

  • Higher manufacturing cost compared to 3-blade propellers
  • Normally made from stainless steel alloys, but can be made from a variety of metals
  • Strength and durability is high
  • Good to great low-speed handling and performance
  • High fuel economy

A Short History of Marine Propellers

In the late 19th century, the race to create the perfect marine propeller was on the rise. Two main propulsion theories existed. One being the momentum theory – a theory describing a mathematical model of an ideal actuator disk – and the other being the blade element theory (BET). The BET broke down the propeller into smaller parts to determine the force on them. Later, the two theories combined to create the blade element momentum theory, alleviating some of the difficulties in determining the factors and calculations of the BET. This formed the modern marine propeller calculation.

Whether your company or production facility is in need of tough mixing propellers or custom cast propellers for demanding industrial applications, depend on the precision investment casting professionals at R2 Quality Castings.

Contact the propeller casting specialists at R2 Quality Castings today for more information on our precision investment casting services.
for more information
REQUEST A QUOTE!
262-542-0763