The Minimalist and Clever Multiball Puzzle Box!!

Great job on the solve! You discovered the solution correctly :)

I love how you solve puzzles. You are very detailed.

Amazing solve as always! It almost confused me as much as the legendary giraffe puzzle! I sadly cannot solve the giraffe puzzle yet😔

Mr. Puzzle, I am so glad our world has intellects like you (and your son!)...Good minds with depth and humor, who will help us all find our way into a complicated future.

No intros lately, hope they're not gone forever. Seemed like Mr puzzle enjoyed doing them.

I’ve always called the small metal balls ball bearings because I’ve seen conical bearings and cylindrical ones. saying their shape first is extremely useful when seeking an industrial sized quote for a purchase. Sure you could say ‘roller bearings’ for cylindrical and ‘tapered’ for truncated cones, but sometimes somebody actually wants conical bearings.

Great solve, Mr. Puzzle! the puzzle box vids are my absolute favorite. Plus... When you use the word 'bearing' alone, it generally means the whole mechanism that facilitates the rotation. A 'ball bearing' is made of of several pieces, as you no doubt know, but other kinds of bearings (thrust bearings, air bearings, etc) can be referred to collectively as 'bearings'. Even simple bronze bushings can be referred to as bearings. I love this subject!

Those are bearing balls used in ball bearings. Why people call them bearings? The bearing is the whole assembly. English is not my first language so I guess this is some kind of language shortcut but it's still confusing.

This is a super amazing puzzle with a very clever mechanism. You explained the mechanism with your drawing very well.

Great and amazing puzzle. The mechanism is very clever.

After reading many of the comments, all of which have some measure of correctness and errors, what you have in that puzzle are just "steel balls!" (Assuming they are steel of course! Otherwise "metal balls" or ">insert material here< balls" to be most rigorous.) They initially might have even been produced to be used in a bearing, but in this case they are being used more as "detents" or locks. So they would/should most accurately be called ">their use< balls" such as detent balls, or locking balls; but ">material< balls" such as steel balls would be generically correct in this case; exception noted above. This is in part because they could have also been made for less precise uses, such as in steel shot used in cleaning and peening systems, or as ballast (weights) or in . . . puzzles. (A "puzzle ball" would probably prove more confusing than helpful though.) But to be precise, if they weren't precision made to run in a bearing race, they are just "steel balls." They could also have been made of ceramic or glass to be used, or not, in ceramic or glass ball bearings as well. In example; a glass ball not used as/in a bearing is usually just called a marble . . . etc., etc. (Glass/ceramic bearings (though rarer) are typically used when they need to be non-magnetic.) It's really not a big deal in this case. Unlike with "Kleenex," no one owns the rights to the name "ball bearing." I think I've beat that parrot to death now. ("No you didn't he's just sleeping!") (Sorry, I digressed. :-)

What a beautiful made and well designed puzzle.

Another great solve! Would a small item such as an engagement ring fit in the space inside and not interfere with the puzzle? If so, that would be an added bonus as possible special gift for someone.

nice fit and finish

My favorite puzzle by Eric at CD. Wait until you see the other quick and easy way to solve. There used to be a video of the process.

Very well made

Very clever indeed!

This puzzle was so cool! 😊

Such a simple solution yet the potential to be so infuriating. Gotta love it.

Nicely scalable box puzzle :)