The Ring'n'Roll is made of two portions of spheres, one inside the other. The outer ring can turn freely around the inner one.
The internal diameter is 20 mm (ask me if you need other dimensions). The inner ring can turn inside the outer shell (the clearance between the ring is 0.75mm, the thickness of each ring is 2 mm)

SUCESSFULLY PRINTED in Alumide. Unfortunatelly Metal is not possible (movable parts). A version with holes (less expensive) is also available.

Very very addictive...

Dimensions

IN: 1.357 w x 1.357 d x 1.141 h
CM: 3.448 w x 3.448 d x 2.898 h

Comments

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@ArtefactStudio No, unfortunately, moving parts are not allowed in any metal: - https://www.shapeways.com/materials/steel-design-guidelines - https://www.shapeways.com/materials/brass-design-guidelines The only solution I see is to print the two parts separately and then force the smaller one into the bigger one. It is possible in plastic (you can disassemble and reassemble it), but I doubt the metal has the same flexibility.
November 12, 2013, 6:49 am
Could it be printed in any metal at all? (eg. Brass?) So captive parts are not allowed in Steel?!
November 12, 2013, 2:59 am
 
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