Where to find small magnets or how to magnetize parts?

[Christophe]

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 ...

I could buy them but I'm in a hurry and the lots are often dozens for this size ... therefore unnecessary!

Do you have any idea where I could collect this kind of magnets from me? Square magnets would also be fine ... since I intend to stick them on the helmet.

I tried fridge magnets (flexible magnetic strip) but they are not magnetic enough ...

Alternative: I have 4 fairly powerful neodymium magnets (but too big for what I want to do with them) but I cannot magnetize a metal part with ... I tried with zinc-plated washers and after several hours , there is no magnetization ...

My magnetism lessons are distant ... any advice?

Thank you

[GuyGadeboisTheBack]

If you have an old hard drive, it's in there. Very powerful.

[Christophe]

Ah? Yes I think I have one lying around ... where are they? How many are there?

[reinoso]

Ah? Yes I think I have one lying around ... where are they? How many are there?

[phil59]

Usually, you have 2 per hard drive, on older ones, not SSDs of course.

Very powerful magnet. But still quite big ...

[Macro]

Otherwise powerful but smaller ... In the boxes of construction games with magnetic balls and rods ... At emaus it is ...

[Macro]

Or that kind of stuff ... They're curtain tiebacks

[GuyGadeboisTheBack]

Where:
https://www.supermagnete.fr/aimants-adh ... roup=discs

[izentrop]

If you have an old Senseo-style espresso maker, in the tank float, you have a small but "powerful" neodymium magnet. There are now also in led flashlights.
Your zinc-plated steel washers will not retain magnetization for long.

[phil53]

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