Page 418 - DC_SWISS(Catalogue_TM_ES-EN)

MICRO SAFELOCK ®

The Micro-Safelock brand, registered and protected by DC SWISS, identifies the tools benefiting from the Safe-
lock system guaranteeing the threaded self-locking assembly, developed and patented by DC SWISS.

For diameters of less than 1.5 mm, the requirements for the interior and exterior threading tolerance are such that
conventional method for production and measurement do not permit the industrial production of components for
conventional self-locking asymmetrical screw assemblies.

This standard self-locking asymmetrical threaded micro-assembly for diameters ranging from 0.30 to 1.40 mm,
which adheres to the tolerances inherent in micro-screw threads, has been designed and patented under the
name of Micro-Safelock. It offers exceptional performance in terms of resistance to shocks and vibrations, based
on the technology used for larger-scale assemblies and fully integrating the 30° gradient into the interior thread
(nut), making it easier to assemble the screw.

When tightening torque is applied, the tensile force exerted on the screw forces it to auto-centre, and the profile
points of the screw come into contact with the edges of the asymmetrical profile of the interior screw thread (gra-
dient), thus leading to tangential contact and a regular distribution of load across all the turns of the thread.

Reducing the load on the first few turns of the thread and directing the stress towards compressing the screw
significantly reduces the fatigue experienced by the screw/nut assembly, thereby making it possible to assemble
and disassemble it numerous times without changing its characteristics.

To correspond to the dimensional requirements, the core of the screw has been amply reinforced compared with
a 60° NIHS or M type thread of the same dimension.

The length of the pitch has been reduced in comparison with the NIHS standard in order to increase the area of
contact between the two fixing elements, with the usable length remaining the same. This obviously offers consi-
derable advantages, particularly when working with soft materials and small-headed screws with a reduced
thread length.

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