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MrfixitRick is back at it, this time around he’s debuting his Tesla CD turbine pencil sharpener. Keen observers will notice the duel blade disk turbine in a standard jewel case enclosure.

This is possibly the worlds simplest turbine. It’s uses a CD jewel case, with only two CD discs as the rotor. The four magnets between the discs act as spacers and magnetic drive.

This turbine has no shaft, no bearings, and no seals, and on compressed air is capable of speeds of up to 8000 rpm.

The turbine is shown magnetically coupled to the pencil sharpener, and propelling it at speeds up to 2200 rpm (so far!). It takes down a pencil real fast!


Tesla turbine + shake flashlight – Link

Tesla meets the Salad Shooter – Link

Tesla turbine from a CD disc pack -Link

Adam Flaherty

I make cool stuff and write about other people making cool stuff on If you have something you think I should see, send me a tip.

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