In addition to static loading, fasteners are generally subjected to frequent
cyclic loadings, including vibrations. Fatigue tests on screws and bolts
(and other items) are most quickly and efficiently performed in a Vibrophore, which can apply cyclic loads up to 600 kN in a frequency
range up to approx. 300 Hz, using grips tailor-made for screws/bolts
and other fasteners. The magnetic drive which generates controlled
resonance in the system (and in the specimen) requires minimal power, resulting in highly cost-effective testing.