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Hi Youtubers. In this video I'm going to
show you how to relatively safely put
together two large neodymium
magnets with a spacer inbetween
without having magnets and
shrapnel flying around.
So - what do you need?
Well I recommend that you use thick gloves.
The thicker the better
Wearing gloves will not prevent you fingers
from being crushed if they are caught
between the magnets in an accident
but they might make it easier to get your
fingers unstucked again.
Next you will need a security board.
This is just a wooden plate with some
metal plates glued to the bottom half.
You will also need what I call a locking board.
It's just a wooden board with a hole in it :)
The diameter of the hole should be the same
as that of the magnets. And the height
of the board should be the same
as the magnet plus the spacer.
Next in line we have a large wedge.
The width of the wedge should be the same
as the diameter of the magnet or larger.
Last but not least: wear safety glasses.
If the magnets accidently smash together
They could shatter or chip sending
very sharp fragments all around.
Personally I prefer a complete face
shield with these larger magnets.
Okay - after you have collected all of the necessary
equipment you need to clear your work area.
Remove all metals. This includes the keys in your
pocket, your wristwatch and your mobile phone.
Also be aware of lamps, radiators and metal in
the table that could interfere with your work.
And now for the part that you have been
waiting for. Let's combine the magnets
and see if I can do it without hurting
myself or chipping the magnets.
First place the security board on your work area with
the metal plates facing downwards and away from you.
Next put one magnet on the board with
it's north pole facing upwards and let it
slide into secured position over the metal plate.
If you don't know the polarities of
your magnets I will show you how to
determine it in an upcoming video.
Now place the locking board over the magnet
and put your spacer on top of the magnet.
If you think the next step is to put the other
magnet with the north pole facing upwards
and sliding it over the spacer
you would be completely wrong.
If you thought that you are not ready
to handle large neodymium magnets yet.
Let me show you why.
Here I have - somewhat simplified -
drawn in green color two of the magnetic
field lines from the first magnet.
Notice the direction of the magnetic
field indicated with arrows.
If you put the second
magnet in this magnetic field with it's
north pole pointing upwards it would
act like a compass and try to
turn around with large force.
This is an uncontrollable position
to combine the magnets from.
Instead you need to put the wedge over the spacer
and guide the second magnet in from far above,
Again with its north pole facing upwards.
Hold the magnet and wedge firmly and make sure
your fingers are not between the two magnets.
If you feel resistance in the second
magnet your polarity is wrong.
Abort immediately by lifting the second
magnet straight up and turn it
180 degrees around before trying again.
Now slide the wedge slowly away making
sure that the wedge and the second
magnet are aligned directly over the spacer.
The force needed will be higher and higher
with the magnets coming closer and closer.
Adjust the second magnet so it's centered
over the hole in the locking board.
Lift off the locking board and slide
the magnets from the security board
by pushing on the lower magnet.
Do not push on the spacer
or the upper magnet.
Well... That's it!
In an upcoming video I'm going to show
you how to take them apart again.