Fasteners
No more magnetized screws clinging to the loading system
In a frame of continuous research, aimed at providing cutting edge products with top-class performances and functionalities, Viteria Fusani presents its new demagnetized screws.
A metallic object can be considered magnetized when its value of residual magnetism exceeds 10 Gauss. Generally speaking, every object surrounding us has by nature a residual magnetism that exceeds this value, but usually this is not a problem. Just to make an example: a ø15 mm magnet can easily have a residual magnetism value that exceeds 1000 Gauss, while metal pieces with a value of 70-100 Gauss can attract at most iron dust. However, when dealing with pieces of a few grams, such as precision screws, even a very low value of 10 Gauss can create troubles with in-line assembly, as screws may cling to metal components and cause annoying jammings and machine downtime.
The residual magnetism value of steel used for screw manufacturing is almost zero; however, when the steel is processed it is subject to several stresses, both structural due to deformation, or thermal, due to heating and cooling during heat treatment and galvanization. As a natural consequence of these stresses, screws become magnetized.
Thanks to an in-house R&D department and the problem solving abilities of the whole staff, Viteria Fusani has implemented its own demagnetizing process with an equipment dedicated to the detection of magnetism on the pieces, that combined with a demagnetization line allows to manufacture screws with a residual value lower than 5 Gauss.
