Determining the self-loosening behavior of fasteners according to the new DIN 25201 has become a whole lot more complicated. But that means components and products will be a whole lot safer. Vibrationmaster CEO Morten Schiff describes new reference and verification testing requirements in this third in a series of four articles about the new DIN 25201.
Old-style vibration testing of fasteners to determine self-loosening behavior just needed a basic Junker Test bench and the fastener. In this second of four articles explaining the requirements of the new DIN 25201, Vibrationmaster CEO Morten Schiff explains that test requirements just got a whole lot tougher.
Demanding new test requirements could result in existing fastener product ranges becoming obsolete as they drop from specification lists. In a series of four articles, Vibrationmaster CEO Morten Schiff explains the important differences between conducting Junker Testing of fasteners for self-loosening behavior under the old standard, DIN 65151, and the new DIN 25201.
The DIN 65151 standard, which has been used by the fastener industry for over 20 years, has been superseded by the new DIN 25201-4 B. It has introduced tough new test criteria that must be adopted by fastener manufacturers. As described in more detail below, DIN 25201-4 B includes a new mandatory requirement to conduct […]
By Morten Schiff, Vibrationmaster. The article was published in: Fastener Technology International, August/September 2011. Click here for online version Fastener and Fixing Magazine, September 2011. Click here and go to pages 124-128 for online version. Not re-testing fastener stock to DIN 25201 could cause product ranges to become obsolete. The following explains the important differences […]
The issue of fastener self-loosening has always been of major concern to the fastener and fixing industry for a number of reasons, some obvious right away, others less so.