Please check out page 2 of the document that can be found at the link below:

http://www.reicon.com.cn/UploadSoft/DIN ... %B7%AE.pdf

I am looking at tolerance spec GTA 14 (table 1 on page 2). The table shows two lots of numbers: “intrinsic†and “not intrinsicâ€. Anyone know what this actually means? The “non-intrinsic†tolerances are much looser.

Surely any dimension on a die casting is “intrinsic†to the die, because the die determines the shape of the casting??? How can features be cast that are “not intrinsic†to the die?

 

Thanks Francois, I understand what you mean with regards to geometry, but to make it more relevant to the casting process I have found the following explanation at this link.

Intrinsic dimensions are those in the same parts of the tool.

Non-intrinsic dimensions are those created by the interaction of movable tool components, e.g. wall thickness and base thickness or dimensions affected by additives or extenders.