Fastener buyers and end users are increasingly insisting on transverse vibration test, or Junker Test, reports compiled according to DIN 25201-4 B. This means the report on your fasteners must provide consistent and accurate data about the self-loosening behaviour of the bolted joint and locking mechanism under test. Test reports based on the old standard, […]
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The DIN 65151 standard, which has been used by the fastener industry for over 20 years, has been superseded by the new DIN 25201-4 B. It has introduced tough new test criteria that must be adopted by fastener manufacturers.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 […]
Introduced in 2010 to replace the old DIN 65151, DIN 25201 demands a much tougher vibration test regime. A key stage to ensuring your fasteners comply with the standard is the reference test, which must be subsequently verified if a secured bolted joint is to gain DIN 25201 accreditation. Electronic displacement control is the only […]
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