Tesla Turbine Pencil Sharpener

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Now that the kids are going back to school you know how much work it was to get all the supplies ready such as sharpening all those pencils. Next time why not build a Tesla Turbine Pencil Sharpener to speed up the process. 🙂 We have featured lots of Tesla Turbine projects in the past such as the blender turbine and and the hard drive tesla turbine, I am sure this won’t be the last one.

Thanks Rick.

"It uses what is possibly the worlds simplest turbine. It’s made as a CD jewel case, using two CD discs and four magnets as the rotor. The magnets between the discs act as spacers and magnetic drive. It has no shaft, no bearings, and no seals, and on compressed air attains speeds of up to 8000 rpm. The turbine is magnetically coupled to the pencil sharpener and propels it at speeds up to 2200 rpm (so far!). It takes down a pencil real fast! The somewhat dangerous Tesla Turbine Pencil Sharpener is housed in a tough clear polycarbonate enclosure in case of imminent failure. The system runs on free energy gathered daily via solar panel, battery, 12 volt air compressor and air tank."

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13 Comments


  1. When will people learn to edit their videos? This was about 1 minute of information stretched out to 8 minutes.


  2. —>PETS
    HE DOES NOT EVEN NEED THE VIDEO EDITOR TO MAKE VIDEO SMALLER JUST HE NEEDS TO STOP TALKING SO MUCH


  3. SORRY ABOVE COMMENT WAS TO PETE NOT PETS


  4. I claim to have invented the world’s simplest turbine, and the only thing you find to pick apart is that I talk to much about it?

    Hehe, I am honoured!


  5. Sorry, that should be “too much about it”, not “to much about it”.


  6. Hey guys,

    Why not give some friendly tips instead of outright non-constructive criticism.


  7. LISTEN I LIKE YOUR IDEA AND I COULD NOT FOUND ANYTHING TO criticize IN IT BUT I TALK WHAT I SEE AND WHAT I FEEL


  8. I like it, first time I’ve seen anyone do anything useful with a tesla turbine. Just a bit too noisy for my liking. But nice build! (2 thumbs up, 4 if I was a monkey) 😀

    Let’s look at it this way, this video offsets the videos that come from the workshop where virtually no words are spoken. lol


  9. This and many like it aren’t strict Tesla turbines (though they are very cool). Tesla turbines rely on fluid viscosity and drag to power the spinning turbine disc, and in most of these designs, the magnets act as turbine blades to assist the rotor.


  10. Tesla recognized the poor low-speed performance of his turbine designs, and specified that up to 24 washers be used between the discs to act as spacers and to increase the starting and low-speed torque of the turbine.

    I believe the spacer magnets that I use do not redirect the fluid flow like a bladed turbine would, and still rely mainly on the viscosity and adhesion (drag) on them to provide force.




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