This is an upgraded version of my Octo-box iris box. To open the box, twist the recessed handles in an anti-clockwise direction. No supports are required for the parts.

I have made an updated lid for this box which hides the screws visible on the top of this design. I also have many more Iris box designs which you can find on my profile page including an improved version of this design 'Octo-Iris Box'. I have also produced a general Instructable guide on how to print my iris boxes to a high quality.

The box (unscaled) is 80mm overall in diameter, has a 64mm wide container opening and is around 80mm tall. The part files are designed for M2x6 countersunk/flathead screws such as these (as with all my other designs); 40 screws are required in total for one box. The parts can be scaled to use larger or smaller screws e.g. the larger printed examples are at 150% scale and use M3x8 screws.

There are two versions of the iris parts: plain flat parts and embossed decorated versions, designated with '(dec)' at the end. There is also a shortened version of the container 'Short Container', which reduces the height of the box from about 80mm to 40mm.

Part testing

Before printing off all the parts you should make sure the screw joints work correctly with your print settings. Print one 'top door' and one 'bottom door' parts. Check that your screws fit tightly in the holes in 'door top' but are free to rotate in the 'door base' holes and the head is flush with the bottom surface. You may need to use hole XY compensation (Ideamaker is a free slicer which does this) to get a good fit.

Printing and assembly

For the box you will need to print 8x 'Top' parts, 8x 'Bottom door', 8x 'Link' and 1x 'Container'. The 'Top door' and 'Top handle' parts can be assembled as you like on the top of the box although I recommend you position them in pairs (e.g. the smaller printed examples use 2, 4 and 8 handle parts).

To assemble the box, begin by screwing the non pointed end of the links to the container.

Next take the door top (and top handle) and door bottom parts and begin assembling them into the iris mechanism. Match the outer holes on the top parts to the outer holes on the base parts. The middle holes and holes on the points of the doors should also be matched together in a likewise fashion.

Continue assembling the doors, ideally in the closed position and keeping the screws straight to keep the box top as neat as possible. Be sure not to overtighten the screws, otherwise opening the box will be difficult. Once assembled, the iris mechanism should be free to open and close in your hands.

Next open the iris fully and place it upside down on a flat surface then take the container assembly and place it upside down on top of the iris door mechanism. Finally screw the other ends of the links to the final holes in the base of the iris.

The 'Octo-Box' should now be fully functional. Let me know if you have any questions or problems with the design.