Oftentimes, this hardness can be machined away by Goltens In-Situ teams. But when the hardness is so severe that cutting it away extends below the manufacturer’s limits for acceptable journal diameter, there are only two options – costly crankshaft replacement or removal of the hardness.
Goltens has demonstrated the effectiveness of the in-situ annealing process and has received Germanischer Lloyd and Lloyds Register Marine Class approvals. Over the decades, Goltens has refined its process for annealing crankshafts and other shafting and can do this successfully In-Situ as well as in our workshops around the world. A deep understanding of the metallurgy, expansion characteristics and safety precautions has been developed and refined over the years into a safe, repeatable, highly controlled process.
Our experience shows that hardness can be successfully removed via heat treatment of crankshafts and that minor finish grinding/cutting can restore the machinery to service with significantly less loss of shaft diameter as well as the avoidance of costly shaft/equipment removal and replacement.
Goltens’ brand has always been synonymous with the repair of diesel crankshafts however, every year Goltens applies this technology to problems in the marine, industrial, stationary power and offshore sectors. Goltens is routinely called upon to repair damaged journals on any and all manner of rotating equipment including compressors, turbines and other shafts and journals.