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Made a cube in a 1 inch ball

Joe in Oz

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#3
Now tell us how, please :) Curious. Might be a good excercise to do with my grandkids....
 

MontanaAardvark

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#5
Could you post a larger picture?

To these old eyes it looks like you made three cubes in three one inch spheres that were one piece, so maybe a 3x1 bar? Or out of three completely separate spheres that you somehow attached to each other? Or are the three just stacked on top of each other?


Bob
 

markso125

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#8
These are what I have been having my students make. I pass them out to school/state administrators and business representatives when they take tours of our facility. Its a cool easy project and they are awesome PR when students are looking for jobs in the area
 

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markso125

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#10
You can make this on a milling machine both cnc and manual its a lot easier then you think it is, the question is how many people have figured out the secret to doing it?

Depending on what material you are using you could even do it on a lathe with a 4 jaw chuck, it wouldn't be easy but it can be done.
My students make the dice out of 1.5" inch aluminum cubes and they retain most of that original size. It is the same process for doing it out of round parts
 

Jimsehr

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#11
Mark

Do you think your students could make this on a manual lathe? A 3/8 ball in a 5/8 ball in a 7/8 ball in a 1 inch cube all parts freefloating.

I have made a part similar to your dice in a shop class on a cnc machine. It had a different shape for each face of the cube. So you had to program each face . Like you
said it is easier then it looks. You make the part in a mill vice and after you do five sides , on the last side you pinch the center part in the vice by using a piece of shim
so part is supported while cutting .

I also think if you can hold a diameter and a depth on a lathe it is easy to make a make a cube in a cube. It is Quite a bit harder to make a ball in a cube or a ball in a ball.
How would you make your dice if the outside was round? How would you hold it?
jimsehr


 

markso125

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#12
I don't think I have anyone at this point in time that could do a ball in a cube, none of my students are up to that skill level yet.

As for holding round parts I usually have them make soft jaws for the mill vices. That reduces the risk of flattening the sides.
 

FOMOGO

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#13
I think you guys have to come help me grind my concrete floors for sealant. You have way too much time on your hands. Free food, adult inebriate's, and tall tales around the fire. Nice work by the way. Cheers, Mike