I'm reproducing in Fusion 360 an object based on a technical drawing, but I have trouble understanding what this means:

enter image description here

When I read the Wikipedia article on Engineering drawing, abbreviations and symbols, it states:

Radius of an arc or circle. Flats and reversals (falling within the dimensional tolerance zone) are tolerated unless "CR" (controlled radius) is explicitly specified.

But I still don't understand how this radius is being measured and therefore how to reproduce it.


1 Answer 1


Measure 12.7 from both edges and the intersection gives the radius centre.


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