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A little magnet experiment for everyone! Answered

Some people just love to play with magnets and have a lot of them.
If you are just like that and like to tinker a bit then I might have something for you.

What magnets you use for the following experiment does not really matter but you should have 20 or 30 of identical properties.
Can be disk magnets, block magnets or cubes, just not spheres ;)

If you have a 3D printer you use it to make it fancy but a peice of wood, acrylic or such and a drill will do for round magnets.
For cubes or flat packs you can make retaining walls on a flat surface.
The experiment goes like this:

I assume you already tried ways to combine your magnets to make them stronger, like stacking them up.
But there is another way to really increase how strong they are combined.
Start with one magnet at the center.
Then like a ring add more magnets around it but with the oppisite side up.
The created mounting solution is to prevent them flipping up and together, you want them as close as possible though.
Add another ring and change the direction of the field again.
Try this magnet, once all magnets are secured and compare the holding strenght to any other combo you tried so far.
It will be much higher for the same amount of magnets.
If you want to prevent the use of glue then try to create your mounting system with a really flat but strong enough bottom - this will then be the contact surface.
Slightly reduced strength but you can re-use magnet with ease.

But if you want to get a really strong one you need cube magnets.
Like before you want to create some sort of grid, this time we go for a square.
Start with cube in the center, facing north up.
Leave enough space in your construction to add 8 more cubes around it - like on the face of a rubik's cube.
Leave them empty for now !
Add nother row, this time 16 to keep the square.
Of course these one go with the south side facing up!
Again one empty of 48 and then one last one with north side up with 196 magnets.
Ok, to be fair, you wouldn't be able to pull it off a metal surface unless you used really tiny cubes, so if in doubt then go for just to 48 and leave the enter one out for now.
Should be quite intense but similar to what any other shaped magnet would have done.
Time to fill the voids!
Add the cubes in the spce between the magnets so the north and south side face the magnets next to it!
So basically sideways but in the correct orientation.
You can then also add the center piece - try either orientation for that one ;)
What happened now is that you forced the magnetic field lines to go up instead od for trying to go the easiest and shortest way to the next magnet.
And "up" is where our magnetic surface would be, which provides the now overdue shortcut for the magnetic fields.
Be amased how much stronger this version is and how much even 3x3x3 cubes would accomplish.
With 10x10x10mm N52 magnets you might be able to use them support our wieght if you pull straight dwon from a horizontal surface...
Ok, kidding, not just might, unless you are really big...
One 10x10x10 might hold about 6kg.
Stacked up a bit more but having 20 or stcked up would not be much stronger than 10.
Even just 25 magnets with one in the center, one row of sideways orientated and one row with opposing field to the center one would be hard to remove from a steel surface.
If we go with the imagined 6kg per magnet we could assume to get 25 x 6 = 150kg of holding power.
Check you single magnet first then compare to the square of 25 ;)
Consider using some plastic between magnet and surface so you can at least slide or pry it off if you have to.

You can also combine magnets or a new one that has one side appear much stronger than the other.
Meaning that for example on the north side it could hold 20kg while on the south side only 5.

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