Sorry for the dump question (and draft paint image) but I am a bit confused:
I have a TP callout for the hole (center of image) on a part like that. Datum A is the Upper plane (basic dimension value not important), Datum B is the vertical Ø through the part as displayed in dashed lines and Datums C as per picture. The callout is A/B/C and I was wondering since C is controlling the rotation in this datum structure, it would be wrong to control this hole as a circle right ? It would need to be a cylinder...
Thanks in advance for your help
In theory, all holes are cylinders, not circles.... In practice, the choice of measuring as a circle or a cylinder is often dependent on how thick the material is and the process used to produce the hole.
In theory, all holes are cylinders, not circles.... In practice, the choice of measuring as a circle or a cylinder is often dependent on how thick the material is and the process used to produce the hole.