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Is Ovality the Same as Roundness?

James H. Sterling • • 6 min read
Is Ovality the Same as Roundness?

As nouns the difference between circularity and ovality
is that circularity is (uncountable) the state of being circular while ovality is (engineering) a measurement of deviation from circularity of an oval or approximately elliptical shape.

What is meant by roundness?

Roundness is defined as the ratio of the surface area of an object to the area of the circle whose diameter is equal to the maximum diameter of the object (13.18) (Leach, 2013). From: Computational Modelling of Biomechanics and Biotribology in the Musculoskeletal System (Second Edition), 2021.

How is ovality measured?

Generally, ovality is measured by difference between maximum diameter and minimum diameter (ID or OD). ... Acceptable ovality of a pipe should be determined by user, but as a guideline, 5% is a typical acceptance criterion, and ASME defaults to 8% [1].

James H. Sterling
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James H. Sterling

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.