Self-locking screws protect against vibration
An
Arnold Umformtechnik product story
Edited by the Engineeringtalk editorial team
Feb 23, 2004
Arnold-Powerlok locking screws feature a trilobular thread and are designed for screwing into existing metric ISO threads (tolerance zone 6H).
Arnold-Powerlok locking screws feature a trilobular thread and are designed for screwing into existing metric ISO threads (tolerance zone 6H).
Onto the normal 60-degree thread flanks there are additional small 30-degree flanks rolled which extend beyond the normal diameter of the screw thread.
When screwed in these 30-degree points penetrate into the counter thread (ISO 6H) and effect self-locking of the screw, providing a seat that is resistant against oscillation and vibration.
The deformation of the nut thread by the 30-degree points takes place in the ductile range of the material.
This ensures a high degree of self-locking and reusability of the screw of up to five times in the same nut thread.
Longitudinal and lateral movement between screw and mating thread are eliminated.
Arnold-Powerlok screws correspond to Property Class 10.9.
By slight carburisation an additional increase of surface hardness is possible.
Arnold-Powerlok screws combine fastening and locking elements in one.
They can replace mechanical and chemical lock retention methods.
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