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Cylindricity is a GD&T tolerance evaluation that quantifies how close a real cylinder is to a perfectly cylindrical form. The Cylindricity Tool in 3D Auto-Dimensioning runs this evaluation against any cylinder feature from your Feature Set — holes, posts, and similar geometry, whether extracted automatically or authored.
All measurements should be performed on an ROI that roughly orients your part to the correct orientation. Without a properly oriented ROI, downstream feature evaluation may not align with your part coordinate system.
The Cylindricity Tool is available in Dimensioning Mode once a Feature Set includes cylinder features on the parent reconstruction. Every ROI built on that reconstruction inherits those cylinders.

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Workflow

1

Select the Cylindricity Tool

Choose Cylindricity from the Toolbar in Dimensioning Mode.
2

Choose a cylinder feature

Click any cylinder feature on your ROI — holes, posts, and similar geometry. Eligible cylinders highlight on hover.
3

Set tolerance

Enter a tolerance value for the evaluation.
4

Submit

Submit to compute the Cylindricity deviation. The result appears as a deviation heatmap on the cylinder along with a pass/fail color-coded label and the standard Cylindricity metric.
Tolerance can be edited after evaluation. Use the Attributes Panel to iterate; the heatmap and pass/fail label update without resubmission.

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Interpreting results

The Cylindricity result is rendered as a heatmap projected onto the evaluated cylinder, with a numeric Cylindricity value and pass/fail state in the dimension label. The heatmap shows how close the surface is to a perfect cylinder. Use the leader and label controls in the Attributes Panel to adjust label placement so the result is easy to read alongside other dimensions in the scene.