Hydraulic tension tightening
For reliable, uniform and fast industrial tightening
Bolted assemblies are without a doubt the most widely used mechanical connecting systems.
We know that amongst the different causes of failure (overloading, design flaw, manufacturing defect, etc.), the most frequent one is poor assembly. It is therefore essential to have perfect control over the levels of tightening force and the precision with which it is achieved in order to obtain the required performance for the bolted assembly. The optimum solution for accomplishing this is tightening by hydraulic tensioning.
Hydraulic tensioning by elongation of the screw makes it possible to develop a great tension force for tightening bolts without any torsional stress or friction, but with high precision and very good repeatability.
Why opt for hydraulic tension tightening?
Compared with traditional tightening methods, hydraulic tension tightening has the following main characteristics:
Tension generated by hydraulic pressure
Axial tension that can be as great as the bolt’s yield strength
Tightening force contained in the tool
These characteristics provide the following technical advantages:
No stray torsion or bending stress in the bolts
High-precision and very uniform tightening
Very well suited for simultaneous tightening, facilitating automation
Compatible with all types of material (stainless steel, titanium, composite materials)
Applicable to all bolt sizes
Reduced number and size of bolts
Possibility of frequent and easy installation and removal
Preservation of the surfaces in contact and less wear on the bolted assembly
No bearing point reaction
In the end, the benefits for the customer are:
Maximum reliability of the bolted assembly
Reduced implementation, checking and maintenance costs
Lower risk of loosening
Greater operating safety
The SKF hydraulic tension tightening solutions
Custom hydraulic bolt tensioners
Special automated machines