Cylindricity

Combines straightness and circularity: how close the whole surface is to a perfect cylinder.

In the shop

Adds taper and barrel shape to roundness. Taper from tool or workpiece deflection shows first in long bores and slender shafts: keep boring bar overhang short and finish with a light cut.

General shop guidance in our own words. The drawing and the standard it cites decide; verify on a sample part.

Related form tolerances

Circularity · Flatness · Straightness

Ask about your drawing

Tell the advisor the feature, the tolerance on the drawing and the material. It answers with machining choices, brand-neutral.

Sources

Definition written in our own words and checked against keyence.com. Symbol and term names follow ISO 1101; we do not reproduce standard text. See the full index.