Radius (noun)

Plural: Radii

Meaning The distance from the center of a circle to its edge. In DFM, it defines the size of a rounded corner.

Think of… A coin used to round off a corner — the size of that rounded corner or fillet.

Etymology Latin radius = spoke of a wheel, ray.

DFM Meaning The measurement used to define the size of a fillet or rounded edge.

Singular - Use a 3 mm radius.

Plural - Increase the internal radii to reduce stress concentration.

Industry Example - All internal radii shall be at least 1.5 mm.

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Part of the Glossary reference.