Where to find small magnets or how to magnetize parts?

[GuyGadeboisTheBack]

In the loudspeakers There are all sizes, some are very powerful.

Yes but no:

I would need 3 small round magnets 8-10mm in diameter. powerful enough to hold a removable part that is light enough but subject to movement: a bicycle helmet visor ...

[oli 80]

Hello everyone, happy new year

loudspeaker magnets are big enough for the use Christophe wants to make of them on the other hand in headphones or headphones and mini microphones

at the time I got some on a figurine to put on the fridge because it was broken

[GuyGadeboisTheBack]

Hello everyone, happy new year

loudspeaker magnets are big enough for the use Christophe wants to make of them on the other hand in headphones or headphones and mini microphones

at the time I got some on a figurine to put on the fridge because it was broken

The speaker magnets are indeed (in my opinion) too big for the use Christophe wants to make of them, namely to attach a bicycle helmet visor ...

[gegyx]

The magnet sheets for magnets are too weak.
In the same type of magnet, there is the flexible bar magnet in the bead of the fridge seal. It is not strong but it holds all the way.
For your visor I think the 3kg cupboard ferrite magnets should be enough.
The circles (1.5cm) that hold the docs on the service board.

Otherwise, (cause leisure free energy / lol), I have neodymium.
But also a stock of hard disks (neodymium), I use it for everything, adapting, I make house door stops.
If too strong, interpose a felt.
Partition the magnet as well but waterproof it on the breakage, because it rusts quickly (cyanoacrylate)
On the surface of the same face, there are two poles symmetrical about the median line

[gegyx]

If it's just so that it is attached to the helmet, maybe think of velcro?

[Ahmed]

Yes, the velcro is light, holds well and remains insensitive to vibrations.

[Christophe]

If it's just so that it is attached to the helmet, maybe think of velcro?

Yes Gegyx, I thought about it except that the visor that I have on hand ... is already equipped with magnet ... well metal parts sensitive to magnets ...

Well here I solved my problem: I found the suitable magnets on an old HS headphones

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[Christophe]

Yes, the velcro is light, holds well and remains insensitive to vibrations.

Yes I would think about it for the future (I have more ...) indeed it will certainly hold better but after the velcro it is less "class" and then it can get dirty (MTB dust ...) but hey it's not prohibitive ...

[GuyGadeboisTheBack]

The magnets, I buy them by 50 or 100 on Aliexpress, (the small ones) it costs almost nothing and there are all sizes, all powers, all prices.

[Christophe]

Thank you but you do not meet the initial specifications!

I needed 2 or 3 magnets ... I didn't want to buy dozens!

What are you doing with so many magnets?