MeiLong 5 20-mag ball core

I created a 20-magnet ball core for my Meilong 5 without the need to drill or file any piece of the cube. For the core, I used twenty-eight 4x1.5 N35 magnets. For the edge and corner mounts, I used twenty-four 3x1.5 N40 magnets and eight 3x1.5 N40 magnets, respectively. Using 3x2 N35 magnets should also work well. Note that the corners of the ball core and the edge mount need to stack two magnets. All the magnets should be glued onto the 3D-printed parts, but I DO NOT RECOMMEND gluing the 3D-printed parts onto the cube, since some of these parts are very fragile and may need to be replaced in the future.

The corner and edge mount should be printed with a 0.2 mm nozzle. The height of the large semicircle at the bottom of the ball core must be exactly 3 mm. Therefore I added three STL files with different offset, the one I printed has a positive 0.6 mm offset, you can try which one fit the best. The four pillar in the middle are support and should be removed after printing.

To tune your cube, first loosen the screw all the way, then count the number of turns you use to tighten it. For N35 magnets, auto-align only works with 8.5 turn or lower. If you want your cube tighter, you may need to use a higher grade magnet.

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Category: Toy & Game Accessories