cylindricity

Grinding produces higher dimensional accuracy of roundness and cylindricity.

Examples of primary form include surface flatness, surface roundness, and surface cylindricity.

Then the part is honed to improve a form characteristic such as roundness, flatness, cylindricity, or sphericity.

Taper, roundness error, and cylindricity error of such a hole, although they would be considered negligible in most other parts, may be unacceptable for a few applications.