When Is Propeller Blade Tip Cutting Necessary? | Hydraulic Cutter Usage Guide
Ship propellers can suffer from severe tip deformation due to impact with solid objects, cavitation damage, or metal fatigue. These issues disrupt balance and cause vibrations, noise, and efficiency loss. Propeller blade tip cutting is a professional intervention applied when the damage cannot be repaired.
Why and When Is Blade Tip Cutting Required?
If cracks, bends, or breakages on the propeller blade tip are beyond repair, cutting becomes the most viable option. This process removes the damaged tip without affecting the structural integrity of the remaining blade. Typically, cutting is carried out in accordance with classification society-approved dimensions.
How Is Hydraulic Cutting Performed?
Hydraulic cutting systems are used for underwater operations. These systems cut the damaged area with high pressure while preserving the integrity of the surrounding material. Divers stabilize the propeller with special fixtures and guide the cutting blade with precision.
Equipment Used
- Hydraulic cutting system and control unit
- Diver stabilization fixture
- Live CCTV monitoring system
- Measuring tools (calipers, gauges, angle meters)
- Class approval documents and technical drawings
Application Steps
- Damage is assessed and measured.
- Cutting point is determined per class regulations.
- Cutting apparatus is fixed to the propeller.
- Hydraulic cutter is carefully operated.
- Symmetry is verified, tip edges are polished.
- The entire process is recorded and documented.
Advantages
- Eliminates the need for full propeller replacement.
- Can be performed underwater without dry-docking.
- Provides a fast and cost-effective solution.
- Accepted by classification societies.
Conclusion
Propeller blade tip cutting is a safe, fast, and effective solution in cases of major deformation. With hydraulic cutting systems, this intervention maintains vessel balance and performance with minimal operational interruption.