Amazing Low Friction With Suspended Magnetic Bearing

Two 100 kg pull force Neodymium magnets and two 80 g steel ball bearings form a great suspended low friction bearing for the 14kg flywheel. The magnetic pull force is adjusted with regular metal bolt and nuts to the absolute limit so that magnetic holding power was just enough to carry the weight of the wheel. The flywheel spun for over 5 hours and rock-backed additional 17 minutes.

https://www.youtube.com/watch?v=_STnL0U9PyQ

Step 1: Adjust the Magnetic Holding Power

To get the lowest possible friction you need to adjust the magnetic holding power so that it is just enough to carry the weight of the flywheel. A thin layer of sewing machine oil also helps to preserve the inertia.

Step 2: Add Magnetic Holding Power for the Launch

Once you have found the perfect amount of magnetic holding power for the flywheel. You need to increase it for the launch. I used some metal to increase the magnetism at the launch so that the tremor caused by the drill wouldn't knock the flywheel down. Once you get the wheel spinning really fast and the spinning is steady enough you can take the added metal or magnets off again. With pneumatic air you could get even faster rpms