Product category:
Mechanical fasteners, fixing and joining, and equipment
News Release from: Arnold Umformtechnik | Subject: Arnold-Powerlok locking screws
Edited by the Manufacturingtalk Editorial
Team on 20 February 2004
Screws protect against oscillation and
vibration
Locking screws with trilobular thread have additional small 30deg flanks rolled onto the normal thread flanks of 60deg to effect self-locking against vibration and oscillation.
Arnold-Powerlok are locking screws that have a trilobular thread They are screwed into existing metric ISO thread (tolerance zone 6H)
This article was originally published on Manufacturingtalk on 20 Feb 2004 at 8.00am (UK)
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Thread forming screw geometry allows the mating material to flow much easier and closer to the core of the screw, at a much reduced installation torque and giving an improved clamping force.
Additional small 30deg flanks rolled onto the normal thread flanks of 60deg, and which extend beyond the normal diameter of the screw thread.
When screwed in, these 30deg-points penetrate into the counter thread (ISO 6H) and effect self-locking of the screw, providing a seating resistant against oscillation and vibration.
The deformation of the nut thread by the 30deg 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 are fastening and locking elements in one.
They can replace mechanical and chemical lock retention methods.
* Easy fully automatic application is possible because problems due to locking elements being caught in feed equipment are eliminated.
* The locking effect is not reduced by temperature or ageing (as is often the case with chemical systems).
* Feeding problems caused by rubbed-off plastics debris on vibratory conveyors cannot occur.
In recent years Arnold Umformtechnik from Germany has become the development partner for joining technology.
The company's motto is "Solutions which connect".
Well-known car manufacturers and electrical industries are among our partners.
At present, over 400 employees produce more than 13 million fastening elements every day.
Arnold is a member of the Wuerth Group.
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