I Finally Balanced These Donut Magnets (One Flick = 8 Minutes)

Hook

I gave these donut magnets one little flick and the heavy disc kept spinning for eight and a half minutes. No motors, no bearings, just magnets and a pole. Now I’ve got three more donut magnets coming and I’m dying to see what a full six-point star does.

Watch this experiment

I set a lower disc with three outer donut magnets (all north up) on a quarter-inch pole. The top disc, also carrying donut magnets, floats above it. You can see the lift and the way the top one gets pulled into the gaps between the bottom magnets. One quick wrist flick and it just keeps going.

What you'll learn

How little energy it takes to spin a surprisingly heavy magnetic disc, why the latching effect matters, and what balance problems I’m hoping three more donut magnets coming will solve.

From the bench

The parts are simple. Two discs, a straight quarter-inch pole, and these donut magnets. No glue needed because the magnet poles stick to the metal discs. I tried bearings but there’s literally no room — the pole fills the hole completely. So friction happens where the top disc presses down on the pole once the magnets latch.

The first run I whipped both sides hard and timed 8 minutes 34 seconds before it stopped. Even a gentle finger flick gave hundreds of rotations. In any normal situation that heavy disc would stop after two spins. That’s the part that feels like exponential gain even though I know every rotation still loses a little energy.

How it works / what we changed

The bottom three donut magnets push the top ones away but also create a suction or latch when a top magnet passes right between two bottom ones. You can feel it — push down and it clicks into place. That latch reduces wobble and seems to let the whole thing spin longer. The current setup is a little lopsided because one magnet is weaker than the other two, so it wobbles. That’s why I’ve got three more donut magnets coming.

donut magnets coming

I mention several times that I’ve got three more donut magnets coming. With the existing three that will give me a six-magnet outer ring. I’m hoping it creates a combined five-point star and six-point star pattern that balances the top disc so the wobble almost disappears. If the latch effect gets stronger and the wobble drops, the run times should go up even more. I’m not looking for perpetual motion, but I am looking for the biggest possible gain from the smallest possible input.

Builder checklist

• Quarter-inch straight pole (no bearings possible)
• Two metal discs that accept donut magnets without glue
• At least six identical donut magnets (three now, three more donut magnets coming)
• Mark north poles consistently — all bottom magnets north up in my test
• Have a way to time rotations (I’m still figuring out a simple counter)
• Start with light flicks and work up to hard whips only after balance improves

Troubleshooting

Wobble is the biggest issue right now. One magnet is weaker so the top disc rocks. Adding the next three donut magnets coming should even that out. If the discs latch too hard and create extra pole friction, I may need to tweak the height of the outer magnets. The 8-minute run was after a hard whip; lighter flicks still beat normal friction by a huge margin but I want consistency.

Safety

These donut magnets are strong. Keep fingers clear when they snap together. The spinning disc is heavy — if it flies off it could hurt. Work on a stable surface and wear eye protection while you’re dialing in the balance.

FAQ

Are you trying to build a free energy machine? No. I’m looking for exponential gain from tiny input. Every rotation still loses energy, but way less than you’d expect.

Why no bearings? The quarter-inch pole fills the hole. There’s no room to fit or clamp a bearing.

Will three more donut magnets coming really help? I think so. The extra magnets should balance the five- and six-point star pattern, cut wobble, and strengthen the latching effect without adding much weight.

How long did the best run last? 8 minutes 34 seconds after a hard two-handed whip. Gentle flicks still gave hundreds of rotations.

What’s next? Stabilize the setup, add the three more donut magnets coming, then maybe try a simple pulse circuit with the six weak 25-turn electromagnets I already have sitting on the bench.

Related on this site

• How to Build a Pulse Motor: Complete Beginner's Guide
• Pulse Motor Rotor Design: Magnets, Materials and Balance
• Magnetic Levitation with Six Donut Magnets
• 7+ Minutes of Motion: Magnetic Disc Spinning With Just a Wrist Flick
• Donut Magnets — Outside Poles & Motion

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