Due to the limited available space, the fastener needed to be just 0.5 mm in diameter! What’s more, a secure process was needed which would enable the fastener to be inserted directly without damaging the delicate plastic housing.
The stainless steel REMFORM® Ø 0.5×2.0 mm realised by SFS is currently the world’s smallest thread forming screw manufactured by cold forming. The entire manufacturing process had to be revamped to create this component, with new demands on tooling, cold forming and thread rolling techniques. In addition to achieving a technological solution, pushing back the previous production limits, a fully capable insertion process was developed, enabling Sonova to considerably increase productivity.
Stamm, a reliable partner for micro injection moulding, has been producing complex, miniature plastic solutions for Sonova for many years. Only close collaboration throughout and an extensive know-how interchange could enable the required design and functional requirements to be met.
SFS offers both miniature fastener solutions and micro injection moulding capabilities from one source, reducing the number of interfaces and producing system solutions with every part operating in unison.
Stamm is a member of the SFS Group.
