Bolt security made
easy with new
Wedge Lock Nut
from Heico
T
he security of
bolted joints
is critical,
understanding the
causes of bolted joint failure
is the only way to resolve an
issue and for this you have
to go back to the basic forces
at work. Preload is the most
fundamental aspect in bolted
joint design, it is the force
that makes a bolted joint work
and able to withstand working
loads. It is a fact that 80%
of all bolted joint failures are
related to incorrect preload,
so maintaining this force is
paramount.
Heico Fasteners innovative
range of anti-vibration washer
products are designed to do
just that and the company’s’
successful philosophy of
continual product development
has seen the recent launch
of the Heico-Lock® Wedge
Lock Nut that uses the proven
locking ability of the original
Heico-Lock® Washer combined
with the ease of use of a
flanged nut. This one piece
design provides the customer
with ease of use, effective bolt
security and a reduction of
assembly time and effort all in
one.
The Heico Wedge Lock Nut is
supplied pre-assembled with
the nut and washer combined
in a captive and rotary way and
uses the preload force, rather
than friction, to positively lock
the bolt in place.
on the inside of the washers
and radial teeth on the outside
results in increased clamping
force being applied during
periods of vibration or dynamic
load.
The external radial teeth embed
into the mating surfaces when
tightened while the internal
cams react to any movement
in the joint by moving across
each other and, as the height
of these cams is greater than
the pitch of the bolt thread,
the increase in the height of
these moving cams increases
the clamping force on the joint,
thus causing the bolt to selflock.
66
PECM ssue 15
The original
Heico-Lock® washer
The one piece design eliminates
the risk of misuse as the 2
component parts are fixed
permanently in the correct
position. The design makes
the wedge lock nut perfect for
use in hard to reach locations
and also offers considerable
reduction in assembly time and
effort. As well as being easy,
safe and fast to use (even for
non-specialist users) the nut is
totally re-usable without any
loss of function
The Wedge Lock Nut is an
exciting addition to the Heico
range that already includes the
original Heico-Lock® washer
and the innovative Ring-Lock
system so why not contact the
Heico team today to discuss
your requirements further.
The proven Heico-Lock®
principle of wedge shaped cams
Tel: 01268 745421
Heico Wedge
Lock Nut
E-mail: [email protected]
Heico ‘Ring-Lock’
System
www.heico-lock.co.uk