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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 extracted from your scan — holes, posts, and similar geometry.
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 Automatic Feature Extraction has produced 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.