Permanent Magnet Motor/Generator Rotor

thingiverse

This is a permanent magnet motor or generator rotor. It uses a double stack of the popular sized ceramic magnets (1-7/8" X 7/8" X 3/8") like these :https://www.harborfreight.com/pack-of-2-ceramic-block-magnets-97504.html for each of the 6 positions. There is a choice of either a rotor for a 8mm shaft or a 1/2" shaft. Use #6 to 32 x 1/2" bolts to attach the ends. Dimensions: 3.5" diameter X 1.885" length. Also added .25" bearing stand-offs on both ends. .01" added to spaces for magnets and bolt holes to compensate for shrinkage of material. I like to use a good polyester glue to secure my magnets. Gorilla Glue works great. Disclaimer: Disclaimer: Experiment at your own risk. Catastrophic failure of parts spinning at high speed can cause damage to property, injury, or even death. 2/24/2018 I added a magnet cover for additional support. This should add some safety when spinning at higher rpm's. A better option would be a fiberglass or carbon fiber layer. This should also be accompanied with 100% infill on the rotor for high speed experiments. Also don't forget to glue your magnets in place. I like Gorilla Glue. It seems to handle shock and vibration the best. Make sure you use water or it won't set properly.