not locking is very important in some
applications so I'm just going to run
through a variety of these and show you
exactly how they are used this is not a
comprehensive guide there may be more
methods than this but this is the
majority of the methods that I am aware
of
a basic way to lock a traditional not we
support the knot on the bolt and then
tighten that up to the specified sort
which you would normally do with a tour
event but for this demonstration we'll
just tighten it by um and then you could
use a locking nut sir
that is a locking nut that is designed
to lock the knots and stop it from
moving so I left inside in the first not
the second not the lock nuts will be
place on there and then it's a tuned up
that will then stop the knots from
working loose in extreme cases with a
lot of vibration these kinds of knots
can actually work loose it is quite
common to use to normal size knots
although you can get a special design
lock not like that especially if I this
purpose
you can use a thread locking compound
this is a very runny liquid which is
anaerobic so when there's no actual air
around it will actually queue it into an
ADIZ if so with this you simply put it
on the threads where you want to lock it
then you put the knot on there
tighten that up and then after that is
cured that will grip the knot and stop
it from moving thread locking compound
is one of the most common ways of
locking knots or locking bolts it is a
very effective way derive actually quite
a few different strengths of this
available so you do have to make sure
you get the correct one some of them
they are so strong that you may need an
impact wrench to undo them afterwards
Loctite is a very common Meg I'm sure
most people will send this so that's a
fast and easy way of locking or not
we then have spring washers they are
made from spring steel and once
tightened they are designed to put a
ball on the actual nut which can prevent
it coming on done it is common to use a
spring washer with a normal pleaseth
washer so that goes on first and then
your spring washer goes on there you do
not always want to use an Arnold washer
when you're using a spring washer it
depends on the application once that's
on there you can then put your nuts on
and you can then tighten that up to the
specified torque they are a very common
way of thread locking but in extreme
cases where does a lot of vibration they
can actually work loose i've also
actually seen these snap and the actual
washer disintegrated into a few pieces
which then meant that the edge will not
came loose which rendered it useless but
most of the time with a washer like art
it does put thoughts on the not making
it difficult to undo it so once it is
tied it is difficult to remove it we
will work a bit but they are not
brilliant if there is a lot of vibration
that can actually vibrate loose so 18
washers can be used to prevent some nuts
and bolts from coming on Dom but they
are not brilliant the problem with these
is if you over tog them you can actually
flatten them so they end up just looking
like a normal washer like that once they
are flat flat up they are pretty much
useless but you can use these insert
some circumstances these are very
popular in washing machines because they
are very cheap so you simply place that
on there put your nuts on
and then you will talk that up to the
specified torque using a torque wrench
it's critical with them that you do not
over-tighten them if you over tighten
them you're just going to flatten the
washer and you'll end up with something
like that so like I said these are very
cheap and that's why they are used in a
lot of washing machines and things like
that the cam prevents nuts and bolts
from coming undone but they are not
brilliant
now lock knots of a ring of nylon at the
top layer and that actually grips the
bolt if you wind it down so you can
start it off quite easily as you will do
with a normal knot but once you reach
the nail on it then becomes incredibly
difficult and you then need a tool in
order to put the knot on the board this
can make it extremely time-consuming
because you've got to wind it all the
way down there with a normal knot you
could just wind it down with your
fingers quite easily so now lock knots
are pretty useful they are used in a lot
of applications but they are
time-consuming to use now lock knots are
useful and you do find them on all kinds
of machines but they are not much good
in critical applications because it can
actually work loops with vibration
something that you may not have seen is
a deformed knot the thread on the inside
of that is actually defined slightly so
I'm pretty easy to wind it on initially
until you get down to the deformed bit
and then it grips very tightly you then
need a spa power socket to be able to
tighten up the knot once you've wound
that darling does grip very well but in
extreme circumstances again with a lot
of vibration these can actually work
loose
and these are quite unique in that they
have comes on the faces of the washers
so these are got together in pearls like
so so you get the two pieces with the
cams on and push them together like so
and you put them onto the balls you can
put on that time you can then tighten
that up to the specified torque once
that knot is tight and those two washers
are gripping against each of it that
will be very difficult to undo these are
also extremely good with vibration it is
very likely that any of these washers
once used correctly would ever vibrate
loose
these are often used in critical
applications such as aircraft or
vehicles etc on an aircraft that will be
placed in position and then it would
actually be why you'd with a piece of
wire and that will prevent it from ever
coming undone so I'll see is one of
these you put it onto the balls turn it
up to a specified torque or until it is
tied
I'm not going to drill through that with
the correct size drill bit should be
good at doing this because I used to do
this for a living
on slightly larger not some bolts than
this
this is stemless they also I'm going
nice and slow I'll just put some more
cutting paste on the drill
which is on that you can then insert a
pin and you can bend that round and that
will prevent it from ever coming undone
until you remove the pin
I hope this demonstration has been some
use to you that is explained some of the
techniques that you can use to stop nuts
and bolts from coming undone
there is also of course tab washers
which I don't actually have but they're
just a normal washer and they've got a
tab on that you can bend up and that can
prevent the not either bolt from coming
loose