Measuring an Internal Spherical Diameter

[Jake E.]

So we have a couple of parts that we are getting, and they have an internal spherical diameter of Ø.873-.874 (finishes at Ø.8755/.8758).

What are the best options for inspecting this diameter with the part still loaded in the cnc machine?.

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[Jim Dawson]

I guess I would use a snap gauge or a dial bore gauge.