Very simple magnet motor princip

[gn0stik]

Do any of you guys have experience of the expected lifetime for neodymn magnets in continuing use?

It depends on attraction and repulsion. If used in repulsion 5-10,000 years. In attraction is much less. Perhaps 1-200 if that. And I'm just guessing.

[gn0stik]

I don't see why the ball couldn't be placed on top of a bearing ring to hold it in place. Perhaps another ring of berrings could be placed in the hole in the ring magnet in which you could place a rod to hold it steady. This should prolong the effect. Just a thought.

[gyulasun]

Do any of you guys have experience of the expected lifetime for neodymn magnets in continuing use?

It depends on attraction and repulsion. If used in repulsion 5-10,000 years. In attraction is much less. Perhaps 1-200 if that. And I'm just guessing.

Hi,

I understand and have read just on the contrary: magnets of rare-earth material last at least 1000-1300 years under normal (mainly in ATTRACTION) usage and at least the same lifetime in weak or medium repulsion if they are not heated up or abused otherwise.

Regards
Gyula

[Ioku]

I know this is old but I thought I would say that I have tried this experiment before and it works like in the video, meaning it will spin for about 15 seconds but then stops, I tried with and without the gap, with the gap worked better but it still will not spin forever.

[gyulasun]

I know this is old but I thought I would say that I have tried this experiment before and it works like in the video, meaning it will spin for about 15 seconds but then stops, I tried with and without the gap, with the gap worked better but it still will not spin forever.

Yes, I agree.  And the (small) rotational energy which is able to spin the rotor for some seconds comes from first the attraction of the rotor while rolling it on the table surface then attracted up,  and second it comes from the small hand movements too (but this latter is really small).

Gyula