Swirling sphere

For this rotor and stator no special equipment is necessary

Author: Jaime Iglesias Garre, Barcelona, Spain, [email protected]

Online since: 02/06/2009, Number of visits: 443061

For my experiment I needed a roll of adhesive tape with a diameter of 75 mm. On the inside of the roll I attached 20 disc magnets S-08-05-N in regular intervals with an isolating tape. As you can see, I needed tons of tape, so the magnets would not attach to each other. All magnets are arranged in the same way, with the north pole towards the inside.

Here you can see in detail how I proceeded with the tape. In this version you cannot see the magnets. Maybe you like this version better - spectators might be even more impressed if they don't get the principle right away.

The rotor consists of a non-magnetic steel sphere type ST-K-13-N and 4 disc magnets S-03-03-N. The individual disc magnets are staggered on the sphere by 90 degrees.

The picture shows 8 magnets, but you only need 4.

As soon as the roll is placed over the rotor, it starts rotating (see video below).

Note from the supermagnete team: Another customer implemented this experiment in 2015 with different magnets and achieved nice results:

Articles used

Steel balls Ø 12,7 mm

not magnets!, ferromagnetic, nickel-plated
To combine with neodymium magnets

	10 pcs.	0,43 EUR ea.*
from	40 pcs.	0,38 EUR ea.*
from	80 pcs.	0,36 EUR ea.*
from	160 pcs.	0,34 EUR ea.*
Ask for a rebate from 5 000 pcs.

Available: 21 550 pcs.

S-03-03-N

Disc magnet Ø 3 mm, height 3 mm, holds approx. 330 g, neodymium, N45, nickel-plated

	20 pcs.	0,28 EUR ea.*
from	60 pcs.	0,24 EUR ea.*
from	140 pcs.	0,21 EUR ea.*
from	360 pcs.	0,18 EUR ea.*
Ask for a rebate from 1 300 pcs.

Available: 467 580 pcs.

S-08-05-N

Disc magnet Ø 8 mm, height 5 mm, holds approx. 2 kg, neodymium, N45, nickel-plated

	10 pcs.	0,65 EUR ea.*
from	40 pcs.	0,54 EUR ea.*
from	80 pcs.	0,50 EUR ea.*
from	160 pcs.	0,46 EUR ea.*
Ask for a rebate from 800 pcs.

Available: 59 570 pcs.

Steel balls Ø 8 mm

not magnets!, ferromagnetic, nickel-plated
To combine with neodymium magnets

	10 pcs.	0,35 EUR ea.*
from	40 pcs.	0,29 EUR ea.*
from	80 pcs.	0,27 EUR ea.*
from	160 pcs.	0,25 EUR ea.*
Ask for a rebate from 1 500 pcs.

Available: 6 580 pcs.

Steel balls Ø 10 mm

not magnets!, ferromagnetic, nickel-plated
To combine with neodymium magnets

	10 pcs.	0,34 EUR ea.*
from	40 pcs.	0,29 EUR ea.*
from	80 pcs.	0,27 EUR ea.*
from	160 pcs.	0,25 EUR ea.*
Ask for a rebate from 2 500 pcs.

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Steel balls Ø 20 mm

not magnets!, ferromagnetic, nickel-plated
To combine with neodymium magnets

	10 pcs.	1,13 EUR ea.*
from	40 pcs.	0,95 EUR ea.*
from	80 pcs.	0,87 EUR ea.*
from	160 pcs.	0,81 EUR ea.*
Ask for a rebate from 550 pcs.

Available: 7 740 pcs.

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