Working Magnetic Motor on you tube??

[Omnibus]

@MeggerMan,

The stator magnets recommended (the one's I also bought) have part number R3.

EDIT: My bad. the stator bearings recommended have part number R3. Sorry about that.

[ken_nyus]

Were you guys able to find stator bearings the same size as Al's?

ID 0.1875, OD 0.5, and 0.125 thick?

That seems to be a hard exact size to find.

Also are these bearings with shields and lubrication/grease inside, or no grease, no shields (you can see the balls) and free running?

[geodan]

interesting stuff from Al here...

http://www.steorn.com/forum/comments.php?DiscussionID=59687&page=36

[geodan]

re post...

    *
      CommentAuthoralsetalokin
    * CommentTime11 minutes ago

permalinkquote
"Test1:
With the rotor removed from the baseplate, using a single rotor magnet, measure how far away from stator you need to be to be able the move the stator magnet using repulsion force. With a heavily magnetic bearing I expect this distance to be very small because of the large amount of friction.
From the ease with which you seem to be able to spin the stators I suspect you have some very non-magnetic bearings."

The bearings are very ferromagnetic, but they seem not to lock up as I would have expected, maybe due to the diametric magnetization of the outer race and the free-spinning of the balls and the inner race.
The answer to the test question is about 10.5 cm.


"Test2:
Using a piece of plastic tube slide the magnet and bearing onto it and measure the maximum gap before the bearing falls off from its own weight overcoming the attraction force."

I don't want to do this test right now, as the only bearings I have of this type are mounted with magnets, and I don't want to disassemble any of them, for what should be obvious reasons.

"Test3:
Using a tube that the rotor magnet can fit in, measure the repulsion distance between like pole of the stator ring magnet. Setup should look like and exclamation mark!"

The answer here seems to be, magnet in holder with bearing, about 3.5 or 3.7 cm. A bare magnet gives roughly the same, maybe, strangely, a few millimeters less. I don't really have a good tube here, the tube I'm using might have some drag.

[Bruce_TPU]

re post...

    *
      CommentAuthoralsetalokin
    * CommentTime11 minutes ago

permalinkquote
"Test1:
With the rotor removed from the baseplate, using a single rotor magnet, measure how far away from stator you need to be to be able the move the stator magnet using repulsion force. With a heavily magnetic bearing I expect this distance to be very small because of the large amount of friction.
From the ease with which you seem to be able to spin the stators I suspect you have some very non-magnetic bearings."

The bearings are very ferromagnetic, but they seem not to lock up as I would have expected, maybe due to the diametric magnetization of the outer race and the free-spinning of the balls and the inner race.
The answer to the test question is about 10.5 cm.


"Test2:
Using a piece of plastic tube slide the magnet and bearing onto it and measure the maximum gap before the bearing falls off from its own weight overcoming the attraction force."

I don't want to do this test right now, as the only bearings I have of this type are mounted with magnets, and I don't want to disassemble any of them, for what should be obvious reasons.

"Test3:
Using a tube that the rotor magnet can fit in, measure the repulsion distance between like pole of the stator ring magnet. Setup should look like and exclamation mark!"

The answer here seems to be, magnet in holder with bearing, about 3.5 or 3.7 cm. A bare magnet gives roughly the same, maybe, strangely, a few millimeters less. I don't really have a good tube here, the tube I'm using might have some drag.

Thanks Al.  Now time for real progress.  Omnibus, I have ordered N35's and will test with those.  Let's each replicator test the same as Al and report their findings, and see if we can find a match for the rotor magnets.

Cheers,

Bruce