In order to achieve the sharp interior corner, which cannot be reached with an endmill, each layer is composed of two pieces.  Each piece has matching holes into which I press-fit steel pins using a hydrolic press.
Nesting Cubes
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Nesting Cubes

The center cube is steel and 1" with a tolerance of .001". The outer layers are made of aluminum. Metal II - Wintersession 2016 - Professor Matth Read More

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