The classification socities consider a cold straightening carried out by MarineShaft as a permanent repair whitout any recommendation!
Class approved cold straightening of propeller shafts and rudder stocks
MarineShaft is specialized in class approved cold straightening of propeller shafts and rudder stocks. With our purpose-built equipment that can press with up to 6,000 tonnes, and many years of experience, we are able to straighten shafts of all sizes - from 20 mm to more than 1,000 mm in diameter.
MarineShaft has the approval from all the leading classification societies for carrying out cold straightening of propeller shafts and rudder stocks. Cold straightening is fully approved and is considered to be a permanent repair without recommendation. All work is done in close co-operation with the classification societies, and a certificate is issued on each individual repair.
Save time - Straightening of shafts is much faster than manufacturing of new shafts. Many jobs can be completed within 24-48 hours from arrival at our workshop. When necessary we work round the clock to ensure our customer the best delivery time. We always have capacity for urgent repairs, and we have the experience to make the right decisions quickly. One of our strengths is our short decision paths that make us able to act immediately.
Save money - Straightening is a more economical solution than having new shafts manufactured.
MarineShaft straightens propeller shafts and rudder stocks from all parts of the world. No matter where in the world the propeller/rudder damage occurs, a straightening is often a profitable solution.
Even the biggest deviations can be straightened. After straightening shafts are as good as new. Often a better straightness than that of a new shaft has been achieved after straightening by MarineShaft. We often obtain a straightness of 0.05 mm or better on even very big shafts. We have straightened shafts with a diameter more than 1,000 mm and with lengths more than 25,000 mm. Some of these shafts have been bored for push/pull rod. All shafts fully approved after straightening by the involved classification society.
Click here to see cold straightening jobs carried out by MarineShaft.
Read more about abouth how the cold straightening technique was developed here.