Does the bolted joint stay in place in the event of extreme vibrations?
Special requirements are set for the use of fasteners in situations in which bolted joints are exposed to extreme transverse vibrations. It is important that the vibrations do not cause these to become loose. This includes trains, harvesters in agriculture and MRI machines in the medical industry. To mimic these conditions and test the effectiveness of the selected fasteners, Jeveka has a Junker tester.
A Junker tester (also known as a Junker machine) tests bolted joints in accordance with DIN 65151. Its compact dimensions and relatively low weight mean that our Junker tester is also suitable for tests and demonstrations on site. The measurement results indicate the force in time that is placed on these fasteners, at the given frequency as well as the displacement as a result of the vibration. This is an indication of the strength of the bolted joint. The machine is highly programmable, which means that you can obtain good insight into the performance of a bolted joint in practice for various types of vibration.
Do you wish to have a specific bolted joint or fastener tested? Please contact us if you wish to use our Junker tester.
In 2018 we did extensive research into the possibilities for an even stronger stainless steel screw. The results of the tests surpassed our own expectations with a tensile strength that exceeded 900 N / mm². The Jextar brand was born.