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Old 19-07-2017, 19:59   #31
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Re: Making and using an electromagnet?

I do not have the data available, but if the purpose is to retrieve objects attracted to a magnetic field, I wonder of some of the rare earth magnets would be as strong or stronger, and not have the problem of corrosion and electric supply.
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Old 20-07-2017, 08:31   #32
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Re: Making and using an electromagnet?

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In spite of the titanium alloys, I foresee this becoming a block of rust after one dip: https://www.amazon.com/BestEquip-Mag...dymium+magnets

I don't know about that but I bought one of these to try to pull small dents out of my teenagers car. I am either really strong or it didn't really have 660 lbs of pull
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Old 21-07-2017, 08:53   #33
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Re: Making and using an electromagnet?

Which ever way, rare earth, ( I would prefer ) or electromagnet, make your magnet, then use Plastidip or something similar to seal the whole thing in plastic. You can seal it as far up the cable as you feel you need. Easy to use, works good for sealing out moistures and cheap. You can buy it at Wallyworld or Harbor Fright.
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Old 21-07-2017, 09:17   #34
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Re: Making and using an electromagnet?

Look up neodymium magnets. That would be less of a hassle.
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Old 21-07-2017, 10:38   #35
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Re: Making and using an electromagnet?

The electromagnet has the advantage of letting go of whatever you picked up when the power is disconnected. With a permanent magnet you'll have to pull or slide the object off the magnet.
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Old 21-07-2017, 10:47   #36
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Re: Making and using an electromagnet?

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The electromagnet has the advantage of letting go of whatever you picked up when the power is disconnected. With a permanent magnet you'll have to pull or slide the object off the magnet.
That's why we have pry bars.
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Old 21-07-2017, 14:18   #37
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Re: Making and using an electromagnet?

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I don't know about that but I bought one of these to try to pull small dents out of my teenagers car. I am either really strong or it didn't really have 660 lbs of pull
Supposedly a magnet rated for 660 pounds would pull 660 pounds and lift 220 pounds. I'll bet the conditions have to be stone cold perfect to lift 220.

It would be pretty hard to detach a magnet with 220 pounds of lifting power from a thick, solid metal object. A cars sheet metal probably didn't give much power at all.....I'll guess 30-40 pounds max....not enough.
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