Hydrocam bolt tensioners
The assembly dis-assembly of precision bolted flanges requires a very strict methodological approach, for errors can lead to costly and often disastrous failures. Several studies have shown that incidents encountered on bolted assemblies are most often due to improper design of the assembly, or poor implementation of the tightening method, tooling, or inspection.
Today it is known that of all the various causes of failures, the most frequent is improper assembly. SKF has worked in the field of bolt-tightening by pre-load tension since the 1940's. The SKF HYDROCAM bolt tensioners can tighten bolts from 5 to 500 mm.