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Shell Thickness

in General
https://cad.onshape.com/documents/5538ba81614b919b9e8ead16/w/64bbdc91224c9ddb8bdc64b4/e/5f465920eb122a3b2e82a520?renderMode=0&uiState=67d04732184f291641209b99
The outer radius is 130 mm
The inner radius is 126 mm
Shell Thickness is 2 mm
So difference of 2 mm more. Why is this?
THen I made another bowl th 133 mm with 2 mm thickenss which I thought would insert into the 130 mm bowl after 3 Print , but it not
where did I go wrong pleasee
0
Comments
Outer diameter is 130 mm.
Inner diameter is 126 mm.
Outer radius is 65 mm.
Inner radius is 63 mm.
65 - 63 = 2.