“Tiny Orbo Replication 3″ update

I finally finished grinding down my N35 NdFeB magnets. They were 59 mils thick, but my bearing is only 47 mils thick. So I decided to *slowly* grind the magnets down. It's very important not to heat the magnets up. This removed the zinc coating plus a bit of NdFeB material. So all 8 of my magnets are now down. Removing the Zinc coating also reduces the eddy currents since the electrical resistivity of zinc is 29 times less than NdFeB. Another advantage is the the Zinc has weight, but does not help increase the magnetic field. Actually, eddy currents can significantly decrease the magnetic field for a short period of time as the magnet moves toward the toroid. Lets just hope that the excess energy effect does not rely upon eddy currents.

Each magnet used to weight 0.32 grams. Now each magnet weighs 0.26 grams. Total weight loss was 19%. I'm using a LanteScale, part number MH-200. Full scale is 200g. Resolution is 0.01 grams. Very nice digital scale, and it cost $14 bran new, that includes S&H. This ultra sensitive scale will help the "Tiny Orbo Replication" be more balanced. I slowly ground each magnet till it was 0.26 grams.

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