Metal dice made of aluminum or titanium "Precision Machined Dice"

In order to make a dice with six faces with equal probability the center of gravity of the dice needs to be positioned so that all eyes are evenly distributed,Dice for squidWe have also devised methods of making, but using five kinds of metals such as aluminum and brass, the precision dice that made the probability of each of the six sides nearly as close as possible "Precision Machined Dice"Has been made, and we are now recruiting investment for commercialization.

Precision Machined Dice by Amber Rix - Kickstarter
http://www.kickstarter.com/projects/124127689/precision-machined-dice

Details of Precision Machined Dice can be seen from the following movies.


Amber Rix, a college student who designed Precision Machined Dice. Five kinds of dice will be made of aluminum (18.4 g), brass (58.0 g), copper (60.7 g), stainless steel (54.5 g), titanium (32.2 g). Aluminum dice is silver, blue, black and red in four colors, if the project goes well, it is a rare metaltungstenAmber says he wants to make something (129.5 g).


For solid matter, the center of gravity is very important to determine the center of things, and in the case of a perfect cube, there are center of gravity at equal midpoints from all six sides. And in the case of dice, another important thing is rotational movement, but rotational dynamics is not only the center of matterMoment of inertiaIt also depends on. Moment of inertia is an amount representing the magnitude of inertia with respect to the rotation of an object rotating about its axis. The larger the moment of inertia around the axis, the harder the substance will turn around.


Amber is software for making cube 3D modelParasolidI decided to create a dice with minimum moment of inertia. Normally, the moment of inertia depends on the shape of the material, but since it is not enough to change the shape of the dice, close the center of the dice to the center of gravity without limit and set the moment of inertia within the range of the moment of inertia in an ideal cube I made it smaller. I could open the dice with the dice, but I adjusted the depth of each hole so that the center of gravity would not change.


In addition, Precision Machined Dice is currently recruiting investment for commercialization. The type and number of dice that can be received by the amount of contribution, such as aluminum dice set of 2 for 12 dollars (about 1000 yen), stainless steel dice set 2 dolls for 19 dollars (approx. 1,600 yen) will change, Extra shipping fee (5 dollars, about 420 yen ~) is required.


The deadline is Japan time, 7:12 am January 11, 2013.