Marine Propeller Repair Services

Marine propellers are designed and manufactured to ensure the highest possible levels of performance and efficiency. However, even minor damage can reduce propeller efficiency and increase the fuel consumption of your propulsion train. For less than the cost of a replacement, Our Metallurgical propeller repair services can give new life to your vessel’s propellers even in cases of serious damage & improve propulsive efficiency.

ROKADE Group provides marine propeller repair services that are subject to a full inspection procedure, which includes customer and class reporting. The repair process includes full heat treatment, dimensional checks, and balancing.

We offer metallurgical propeller blade repairs of any OEM installations.

The standard scope includes:

Metallurgical repairs: such as welding, straightening, grinding & polishing, diameter reduction & trailing edge cutting

OEM independent specialists

Hydrodynamic calculations before repair

1. Blade polishing

2. Straightening of propeller blades according to classification standards

3. Blade tip renewal

4. Replacement of missing tips

5. Propeller modification such as trailing edge modifications

6. Blue fitting

7. Balancing

The standard scope for Marine Propeller Repair Service
Marine Propeller Repair Service

Propellers spend most of their life cycle under water. Damage of the propeller blades is just one of the consequences.

Wear or damage can remain unseen for a longer period of time. Unless your vessel starts to vibrate. Damaged blades can do a lot of harm to the propulsion installation. This indirectly affects the efficiency and cost for repairs with time as the damage increases over time.

Key Benefits

Improve your vessel’s propulsive efficiency by up to 5%.

Save money – repairing a propeller costs 60–70% less than a full replacement.

Benefit from a quick return on investment, typically between one to three months.

ROKADE Group offers high-quality OEM repair solutions to damaged propeller equipment

Our Procedure

1

Propeller blade straightening

Heat straightening of blades according to classification standards

Crack control of blade and blade flange by authorised personnel

Grinding including weight/moment control

Complete 3D measuring – compared to original drawing dimensions

Final result where the original optimal propeller performance is recovered

2

Blade and hub welding

Propeller blade tip renewal

Welding of extra material

Blade edge welding and finish grinding

Crack repairs

Propeller hub repairs

3

Propeller blade control

When a propeller blade is received at our Workshop, it will be cleaned and checked from flange to tip, for cracks and surfaces requiring machining.

The following complete 3D measuring of the blade will be compared to the original drawing dimensions.

6

New heat straightening procedure

We use the advanced Induction Heating method for accurate temperature and material structure control in the 700 - 900° C range.

This procedure has been chosen to avoid microscopic cracks and stress of the material.

5

Safe and efficient handling

Our trained service engineers are available for safe dismantling and fitting of the blades at site.

4

Machining of propeller blade

Machining of blade flanges and grinding of blade profiles are performed by skilled, experienced specialist personnel – supported by our your specialist.

7

Intermediate control

Control measurements on the blade will be carried out several times during the straightening procedure – and recorded.

8

Final control

Before shipment and delivery the blades will be crack controlled, inspected and approved by the classification society.

9

Dynamic Balancing

Dynamic Balancing Process will be carried out before job dispatch on SCHENCK Rotec Machines as per ISO1940/1 standard.

Our capacity for job balancing is from 0.5 KG to 30,000 KG, with a diameter of 5 meters.

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