Where to find small magnets or how to magnetize parts?

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GuyGadeboisTheBack
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Re: Where to find small magnets or how to magnetize parts?




by GuyGadeboisTheBack » 08/01/21, 16:09

Christophe wrote: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?

When I buy 100, I give it to friends. Otherwise, it is very useful for DIY. The applications are so varied that I don't know what to say. It goes from the recovery of screws, bolts, nuts fallen "somewhere" and inaccessible, through the fixing of various removable elements, to the decoration of the fridge ... etc, etc ...
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Re: Where to find small magnets or how to magnetize parts?




by gegyx » 08/01/21, 16:53

In this regard, an easily achievable tool for recovering and collecting ferromagnetic debris easily and depositing them in their place, by simply moving back the handle (the bar which carries the magnets).

The magnets move back into the slide with the debris which is stopped by the outer shield and then falls into a container.
I had started in series with smaller and more aesthetic ones for seamstresses, but this quick thing is quite enough
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Re: Where to find small magnets or how to magnetize parts?




by Grelinette » 08/01/21, 21:18

I picked up several very powerful small round magnets from a pool accessories store (they gave them to me): some pool alarms turn on and off with these little magnets with keyring ring and some stores keep those magnets when they change an alarm to troubleshoot customers (or someone who asks!).

Otherwise when I need some really strong little magnets, I go to a computer store and ask if they can give me the old HS hard drives. Usually they give them without problem; one day I also recovered a box full of HS hard drives.
All the magnets were different in shape and size: dishes in the shape of a small crescent.
On the other hand, disassembling them and taking off the magnets is sometimes not easy!
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Re: Where to find small magnets or how to magnetize parts?




by GuyGadeboisTheBack » 08/01/21, 22:23

Grelinette wrote:On the other hand, disassembling them and taking off the magnets is sometimes not easy!

It is better to cut the part around the magnet without trying to peel it off, otherwise it will break. Afterwards, I have not tried to do it (if however they are stuck) with a hair dryer, but it is worth trying.
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Re: Where to find small magnets or how to magnetize parts?




by gegyx » 08/01/21, 22:45

No, with a big cutter it comes off if it is stuck (like cyanoacrylate) Sometimes the protective coating peels off. And dragging.

Above all, you have to spend a lot of time there.
A screwdriver for prying. a curved "telephone" clamp is practical and especially fine "Torx / stars" keys on handle. Because disassemble all this with bent Torx keys, hello the wrist, and the carpal nerve ... Or bits on a small screwdriver.
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Re: Where to find small magnets or how to magnetize parts?




by phil53 » 09/01/21, 12:44

GuyGadeboisLeRetour wrote:
Grelinette wrote:On the other hand, disassembling them and taking off the magnets is sometimes not easy!

It is better to cut the part around the magnet without trying to peel it off, otherwise it will break. Afterwards, I have not tried to do it (if however they are stuck) with a hair dryer, but it is worth trying.

Just heat up enough and it peels off easily.
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Re: Where to find small magnets or how to magnetize parts?




by reinoso » 09/01/21, 14:05

phil53 wrote:Just heat up enough and it peels off easily.


and what becomes of the magnetization ??
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Re: Where to find small magnets or how to magnetize parts?




by GuyGadeboisTheBack » 09/01/21, 14:53

reinoso wrote:
phil53 wrote:Just heat up enough and it peels off easily.


and what becomes of the magnetization ??

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Re: Where to find small magnets or how to magnetize parts?




by Flytox » 09/01/21, 17:42

Christophe wrote: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


To magnetize a "scrap" one does not need mild steel (galvanized washer), with too little carbon and too few alloying elements. Low alloy steels (<5%), on the contrary, are generally much more persistent. The "yield" by sticking on another magnet is not famous (but you may not want to make yourself a magnetizer *) .... and the orientation of the field will not necessarily be in the right direction. The contact time does not do much, it "takes" (or does not take : Mrgreen: ) in a fraction of a second.

(* noted: by rereading ... no rudeness here! : Mrgreen: )
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Re: Where to find small magnets or how to magnetize parts?




by GuyGadeboisTheBack » 09/01/21, 18:40

Flytox wrote:
Christophe wrote: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


To magnetize a "scrap" one does not need mild steel (galvanized washer), with too little carbon and too few alloying elements. Low alloy steels (<5%), on the contrary, are generally much more persistent. The "yield" by sticking on another magnet is not famous (but you may not want to make yourself a magnetizer *) .... and the orientation of the field will not necessarily be in the right direction. The contact time does not do much, it "takes" (or does not take : Mrgreen: ) in a fraction of a second.

(* noted: by rereading ... no rudeness here! : Mrgreen: )


https://fr.wikihow.com/magn%C3%A9tiser-le-m%C3%A9tal
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