We are Turkey Representative of Marineshaft A/S.
Class-approved cold straightening
MarineShaft is specialized in class-approved cold straightening of all types of shafts. We can repair a damaged and bent propeller shaft, tail shaft, intermediate shaft, ram shaft, cam shaft, rudder stock, rotor shafts, generator shafts etc. with short delivery time.
We have many years of experience and our straightening method is approved by all the leading classification societies as a permanent repair without any conditions. This shaft alignment service was first approved by Bureau Veritas in 1972.
How to put a bent shaft straight?
The cold straightening of shafts is carried out with our purpose-built hydraulic press and our biggest press can press with up to 6,000 tonnes. This is a cold process without use of any heating.
How big shafts can be straightened?
We can straighten shafts from 20 mm up to 1,500 mm in diameter with no limitation to the length.
All shafts are thoroughly inspected and tested before and after straightening for crack indications. All work is done in close co-operation with the classification societies, and a certificate is issued on each individual repair.
Advantages of cold straightening:
It is fully approved by all major classification societies
It is considered to be a permanent repair
The result is equivalent to a new shaft – max. 5/100 mm
It is fast and cost effective
The metallurgy of the shaft material is not adversely affected
It is an environmentally friendly solution
We always have capacity for urgent repairs
Our many years of experience qualifies us to make the right decisions fast. Another strength is our short decision paths – this enables us to act immediately.
A propeller shaft often gets damaged, when the shaft line arrangement suffers failures. Damages also occur during shaft redrawal or when removing the couplings etc.
We can repair any type of damages on shafts
No matter what caused the damage, we have the knowhow and workshop equipment to fix your shaft problem.
- Is your propeller shaft, tail shaft or intermediate shaft bent?
- Is your shaft suffering from wear?
- Does your shaft have marks and scratches on surfaces, flange, journal bearing areas etc?
- Does your shaft need a new liner?
- Does your shaft need coating/rust protection?
- Does your coupling need repair or replacement?
Etc.
Let us assist you
- We can straighten your bent shaft with class approval
- We have class-approved welding techniques for welding of all areas
- We have raw material in stock for manufacturing of new shafts and liners
- We have lathes and milling equipment for machining of any dimension
- We can repair the entire shaft line equipment
- Our welders are certified and with many years of experience
- All our repairs are class-approved
Before repair we carry out an initial inspection of the shaft in association with the involved class society and before returning we carry out a final run-out control and inspection of the shaft.
We are ready to assist you with a repair solution. If you also need on-site services such as supervising, shaft alignment services, re-installation of shaft line or other in-situ machining we also provide these services.
Reconditioning of rudder stocks
We specialize in repair of damaged rudder stocks. We have the workshop machining facilities to repair rudder stocks of all sizes and with short delivery time. No matter if you need a repair of the rudder stock alone or the complete rudder arrangment we have the reconditioning expertise.
Why replace if repairable?
We have the experience to solve your rudder stock problem
We have repaired all types of damages on rudder stock and our repair techniques are fully class-approved. We have the class approved welding certificates to start a repair immediately. This is an important factor when time matters. All repairs of a rudder stock includes an inspection and NDT test upon arrival in our workshop. As we keep a large stock of stainless steel and bronze material for manufacturing of a new sleeve, bushing etc. we can reduce the repair time significant.
If the rudder stock is bent we can cold straighten the rudder stock with class approval.
If the rudder stock is suffering from corrosion problems or others we can weld up the rudder stock using MAG-welding or other welding types
If the rudder stock needs a new flange we can manufacture and replace
If the rudder stock needs a new sleeve we can manufacture and replace
if the rudder stock needs coating / rust protection we have the experience
Before and after repair of a damaged rudder stock.