Loading

Double Dovetail Puzzle with a twist

by damienb, published

Double Dovetail Puzzle with a twist by damienb Mar 20, 2013

Description

The double dovetail puzzle is a classical brain teaser that defy intuition at first... How the 2 pieces where assembled with these two dovetails? I've added a twist inside to raise the disassembly difficulty.

You can see the puzzle in action in this video:
youtube.com/watch?v=djktBAgd2qU

Recent Comments

view all
Cool! I want to print one!
I've corrected the puzzle (V2) to:
- enlarge it so it's not possible to lose the marbles in any situations
- add 2 arrows to ease the assembly

The final size with 15.5mm marbles is a bit large for my taste (117*117*37mm) so I've generated a version for 10mm marbles (78*78*26mm), you can find them for cheap as steel ball bearings in online stores.

More from Puzzles

view more

Makes

Liked By

view all

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. Print Thing Tag

Instructions

This is my first brain teaser (and most complex assembly so far). You need 2 marbles (1/2inches diameter, STL provided) for the internal mechanism. I've added a 1mm clearance in the marble slots and the dovetails.

I finaly printed this one in PLA, 2 shells 20% infill, and got my first experience with warping on a non-heated bed... Only the external faces were warped, and the dovetail part was pretty flat, so I just had to do a little bit of sanding to make it slide nicely!

When doing the right actions there is a maximum of 4 steps to open the puzzle, but there are traps and dead-ends that will play tricks with anyone who's tempting to solve it. It's not an difficult puzzle probably 3/5 but should be challenging enough. You can check the solution here: wp.me/p3gI7M-2M at the end of the post.

To assemble the puzzle:
1/ push the 2 marbles in the holes (1 per piece)
2/ hold each marble/piece between the thumb and forefinger
3/ completly slide the the pieces starting with the corners with the arrows
4/ try to disassemble it!
Cool! I want to print one!
I've corrected the puzzle (V2) to:
- enlarge it so it's not possible to lose the marbles in any situations
- add 2 arrows to ease the assembly

The final size with 15.5mm marbles is a bit large for my taste (117*117*37mm) so I've generated a version for 10mm marbles (78*78*26mm), you can find them for cheap as steel ball bearings in online stores.
Top