Simple Ball Bearing Car

cults3d

Here's how it works: Designed, 3D printed, assembled and tested in under one hour, a simple ball bearing car uses a single piece chassis made entirely of 3D printed material with four neodymium magnets and four ball bearings to create a fun project that kids can help print and assemble. It rolls quite far on smooth surfaces. I designed my chassis at .2mm layer height with 20% infill and no supports which took around 25 minutes to complete. Next, I pressed the four neodymium magnets into the magnet sockets in the chassis using slip joint pliers. Finally, I connected the four ball bearings (one each) to each of the four neodymium magnets and it was ready to roll! On a smooth wood floor, this model will coast 30 feet or further. One final note: the neodymium magnets are small and the ball bearings easily separate from the chassis, so please use caution around kids.