December 2018 Print Contest

Description: This coin has planetary gear system inside, which is printed in place. After giving it a good hard tuck when it's printed, the gears come loose. The bottom has two holes to hold the coin. When you twist the outside ring in one direction, the top plate spins in the opposite direction. Every part fit's into another and together they hold everything in place. To be able to open the coin and show the inside as in the photo, the central axis rod has to broken. The challenge for this design was printing moving parts on top of each other. Printed with Verbatim Silver 1,75mm PLA 0,2mm layer height Brim, no supports