| Quantity: | |
|---|---|
The propeller of a ship is the core component of the marine propulsion system, which generates thrust by rotating and converts the mechanical energy output by the engine or motor into propelling force in water, thereby propelling the ship forward. The structural design, material performance and manufacturing precision directly affect the thrust efficiency of the ship, fuel economy and sailing stability.
We can customize and produce marine propellers with different diameters, different numbers of propeller blades and different structural forms according to the drawings or technical parameters provided by clients, including types such as fixed-pitch propellers (FPP), controllable pitch propeller(CPP) and kort nozzle/ducted propeller. The screw propellers are widely used in cargo ships, engineering vessels, fishing boats, marine engineering equipment and various types of ship power systems.
Through reasonable hydrodynamic design and strict machining control, the rotary screw propeller features high propulsion efficiency, low vibration, low noise, and stable and reliable operation, and can adapt to the long-term continuous working marine environment.
Propellers are usually manufactured from marine alloy materials with high strength and good corrosion resistance. Common materials include:
· Nickel Aluminum Bronze (NAB) Propeller: With excellent resistance to seawater corrosion, high strength and strong cavitation resistance, NAB is one of the most widely used materials for marine propellers.
· Manganese Bronze Propeller: With good mechanical strength and wear resistance, manganese bronze is suitable for various medium and small-size marine propulsion systems.
· Stainless Steel Propeller: Used in some special working conditions or applications with high strength requirements, stainless steel provides higher strength and excellent corrosion resistance.
These materials not only ensure that the propeller can operate stably under high-load working conditions for a long time, but also effectively resist seawater corrosion, gas corrosion and erosion wear, thereby extending its service life.
The primary function of our Marine Propeller Blades is to convert rotational power from the main engine into effective thrust for vessel propulsion. Each blade features a hydrodynamically optimized profile designed to generate maximum forward thrust while minimizing energy losses during operation. The precision-engineered blade geometry ensures smooth water flow across the pressure and suction surfaces, effectively reducing cavitation onset and vibration levels. By maintaining optimal hydrodynamic angle under varying operational conditions, our blades deliver consistent propulsion performance, improved fuel efficiency, and enhanced vessel maneuverability across the entire speed range.
Our Custom Marine Propeller Blades are manufactured from high-strength nickel-aluminum bronze or marine-grade stainless steel, materials specifically selected for their exceptional seawater corrosion resistance and favorable strength-to-weight characteristics. The alloy composition provides excellent resistance to impact damage from submerged debris and effectively withstands cavitation erosion during prolonged operation. Each blade undergoes precision five-axis CNC machining to achieve strict geometric tolerances, ensuring accurate fit with the propeller hub and maintaining dynamic balance at operational speeds. This precision manufacturing results in reduced vibration and noise levels, extended service life, lower maintenance requirements, and improved operational reliability for vessel operators worldwide.
| Parameter Item | Customizable Range | Remarks |
| Material | Nickel-Aluminum Bronze / Manganese Bronze / Stainless Steel / Composite Material | Selected based on vessel type & operating conditions |
| Diameter | Customized per design (e.g., 500mm - 10000mm) | Any size customizable |
| Number of Blades | 3 / 4 / 5 / 6 Blades | Affects vibration & efficiency |
| Pitch Ratio | 0.6 - 1.6 (Customized as per drawing) | Designed based on speed requirements |
| Rotation Direction | Right-hand / Left-hand / Contrarotating | Determined by main engine configuration |
| Manufacturing Process | Precision Casting + 5-Axis CNC Machining / Monobloc Casting | Ensures blade curve accuracy |
| Surface Roughness | Ra ≤ 3.2 μm - 6.3 μm (Finer upon request) | Reduces frictional resistance |
| Weight | Calculated per final drawing | Weight certificate provided |
| Certification | Factory Certificate / Classification Society Approval (ABS, BV, CCS, DNV, LR, etc.) | With customer's request |
Our propeller blades are built for vessels that demand reliable performance—whether it's a cargo ship navigating deep waters, a tugboat handling heavy loads, or a yacht cruising at high speeds. You'll find them in main propulsion systems, as well as in thrusters for dynamic positioning and maneuvering. Designed to hold up in harsh marine conditions, they resist cavitation and corrosion while keeping efficiency high. Trusted by shipyards and marine engineers worldwide, our blades meet classification society standards and help improve vessel handling and fuel economy.
· Casting: Precision casting is carried out according to the design model to ensure the basic shape and dimensions of the blades.
· Rough Machining: Rough machining is carried out on the propeller hub and key mounting components through multiple machining processes such as turning and milling to remove excess allowance and form the basic dimensions.
· Precision Machining of Blades: CNC milling and manual trimming are carried out on the propeller blades to ensure that the blade geometry, pitch distribution and surface accuracy meet the design requirements.
· Surface Grinding & Polishing: Precision grinding and polishing are carried out on the blade surfaces to reduce surface roughness, improve hydrodynamic efficiency and reduce operating resistance.
· Dynamic Balancing: Dynamic balance correction is carried out on the propeller to reduce vibration and noise during operation and improve overall operational stability.
· Protective Treatment: Anti-rust oil or protective agents are applied to key machined surfaces to prevent corrosion during transportation.
· Cushioning and Fixation: Wooden supports or special support structures are used to fix the product, which can prevent deformation or collision during transportation.
· Outer Packaging: The product is packed with customized wooden cases or steel frames, which are suitable for sea transportation and long-distance transportation.
