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this post was submitted on 06 Sep 2023
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Putting a tool in a powered coil will magnetize it temporarily but I don't think it will stay magnetic or at least not for long. They sell little magnetizers that you can get cheap that will last a lot longer though if that's what you're looking for..
I have one like this around somewhere that worked well when I tried it.
https://www.amazon.com/Ullman-No-Specialty-Magnetizer-Demagnetizer/dp/B00829S1JI/ref=sr_1_13?keywords=magnetizer&qid=1694044940&sr=8-13
Depending on the coils number of windings, and the size of the tool it will magnetise it pretty well. I used to do this to screwdrivers before they came pre-magnetised. And they will stay magnetised for a very long time.
Most of the time the reason for becoming demagnetised is due to dropping the tool several (many) times.
I've had good results discharging a 450V 1kJ capacitor bank through several turns of 10 AWG wire. If you don't have a capacitor bank laying around, one of those magnetizers will work just as well.
I appreciate it, I didn’t realize it was so temporary
Really? If have had good results just placing a screwdriver inside an electromagnet, still magnetized a few years later.
Maybe it depends on the coil/power source. When I tried it I was just messing around with a coil I had and 12v source and it was not that effective.