A 20 mm threded rod as a shaft.
2 Bearings for the axial support.
2 neodymium magnets, withe the poles opposing each other,forsupporting the vertical load.
50 * 25 *5 mm 20 kg pull force / magnet
Fiat brakedisc for the magnets
12 neodymium magnets 25 mm* 19 mm 25 kg pull force.
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