ESDU 14002:2012

$62.40

Lock Nuts and Other Thread Locking Devices

Published By	Publication Date	Number of Pages
ESDU	2012-11	45

Guaranteed Safe Checkout

Category: ESDU

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

ESDU 14002, which supersedes ESDU 87023, gives guidance on
fastener devices commonly available to prevent joint loosening
under severe vibration in service. The bolted assembly is designed
with the bolt(s) pretensioned to a prescribed load (see ESDU
14001), and the methods of maintaining that pre-load are
considered. In particular, the double plain lock nut is examined
and tightening procedures recommended. The influence of tolerances
on the pre-load are considered, using a worked example. The effect
of vibration cycles on loss of pre-load in a lock nut arrangement
is shown and compared with the use of a single plain nut. This
comparison is made in terms of a fatigue stress-endurance curve.
Additionally, the results of over 1320 load- or shear-displacement
tests are presented as endurance curves, showing the loss of
clamping force during transverse shear loading in joints with
different nut and bolt combinations.