This is a magnetic speed multiplier, the multiplication ratio is 7: 2. In the outer disc there are 20 alternating polarity magnets, in the intermediate disc there are 14 bolts of magnetic material and in the inner disc 8 alternating polarity magnets. This system allows to increase the rotor revolutions but at the expense of the torque. Thanks to supermagnete.com for providing me with free magnets. Here the magnet used in this project. Magnet Disk S-09-03 http://sumag.net/s-09-03-n52n-x01 Flux Detector https://sumag.net/flux-detect-xl-x01 LIKE & SUBSCRIBE HERE: http://bit.ly/Sub2MagneticGames WATCH MY TOP VIDEOS HERE: http://bit.ly/MagneticGamesTopPlaylist On my channel you will find all the ways to have fun with magnets divided into 3 main categories: Classical magnetic experiments such as magnetic levitation, homopolar motors, small magnetic weapons, Gauss cannons, gears, magnetic field viewers and much more. Satisfaction video like the construction of magnetic sculptures, slime and magnetic putty and product review. ASMR relaxing videos to watch but above all to listen preferably with stereo headphones to be able to appreciate the particular sounds of the magnets Follow me: https://www.magneticgames.eu/ Facebook https://www.facebook.com/MagneticgamesIt TikTok https://www.tiktok.com/@magneticgames_official Instagram https://www.instagram.com/magneticgames_it/ About Magnetic Games: All ways to have fun with magnets. The magnetism has always intrigued me. The strength of the magnets is scientifically explainable but there's something "magical" about its interaction with the world. My Channel offers you curious experiments and fun games to do with magnets. Magnetic Games https://www.youtube.com/kappaquellobello #magneticgames #magnets #gearbox