The Lost Bearing (Puzzle)
thingiverse
Can you get the bearing out? Get the ball to come out of the opening on the side and you've done it. Inspiration taken 100% from a video I saw on YouTube where YouTuber Mr.Puzzle solved "The Lost Marble" in real time. https://www.youtube.com/watch?v=-QplnfP933w While watching I thought to myself "Huh, I could make that", and so I did. I didn't have a marble handy, but I did have a 3/8" ball bearing, hence the name. If you want it to work with a standard 5/8" marble, just size up the model to 153% its original size and print. Don't want the solution spoiled? Just print it as-is without looking at the tool-path and then pop the bearing/marble in and give it a little shake.
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