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 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
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.